Diesel Systems

Modern common-rail systems

By means of products such as unit pumps, unit injectors or even the common-rail system, Bosch made a significant contribution to the development of modern diesel systems. Bosch technology stands for the powerful performance and the efficient fuel combustion of modern diesel engines.

In 1997, Bosch launched the first common rail system onto the market. The system’s name is based on the common rail supplying all cylinders with fuel. At conventional diesel injection systems, the fuel pressure for each injection cycle has to be generated separately. At common-rail systems, however, pressure build-up and injection are separated from each other. Fuel is thus always available at the required injection pressure.

Bosch offers a broad spectrum of common-rail systems that delivers state-of-the-art answers to typical requirements. Bosch common-rail injectors for the off-highway segment work with pressures between 1400 and 2700 bar. The various types of common-rail pumps are suitable for use in a wide range of off-highway applications.

Modular common-rail system for commercial and Off-Highway vehicles

The modular common-rail system CRSN for commercial vehicles and off-highway applications ensures efficient fuel supply and fuel injection in diesel engines. It is scalable for pressure levels between 1800 bar and 2500 bar and can be used variably in engine sizes with up to eight cylinders. The system is suitable for displacements of 4 to 17 liters and engine powers of up to 850 kW. High nozzle flow rates enable optimization of the combustion strategy as well as high engine performance. The system is designed for the electrification of the powertrain.

The system consists of a high-pressure pump, a high-pressure rail, a leakless injector for each cylinder and an electronic engine control unit.

System components and modules can be combined in different configurations to meet the engine manufacturer’s specific requirements.

Features

- No. of cylinders: up to 8

- Available system pressure levels: 1800/ 2000/ 2500 bar

- Max. 5-8 injections per cycle

- 12 V and 24 V operating voltage

Customer benefits

- For 6 cylinder engine power up to 850 kW

- Contribution to Euro VI and comparable standards

- Modular combination of various system components and modules

- Scalable for available pressure levels

- Oil and fuel lubricated pumps possible

- High hydraulic nozzle flow rates for improved combustion and high engine performance

- Start-stop and hybrid capability

Solenoid valve injector CRIN
Specialist for long lifetime and high performance

The rapidly switching solenoid valve injectors are a central component of the CRSN modular system and inject a specific quantity of fuel into the cylinders to match the driving situation and ensure economical combustion. The leakless solenoid valve injectors allow a high degree of freedom for the injection rate shaping. The high efficiency of the injector contributes towards reducing fuel consumption and CO₂ emissions. The solenoid valve of the injector is controlled by the electronic control unit. The control unit causes the nozzle needle lift. Thus, the fuel can be injected directly into the engine's combustion chamber.

The injector is permanently supplied with fuel from the rail via the high-pressure connection. The injection is initiated by the control unit via the electrical connection. The backflow quantities arising during the injection flow back to the tank via the fuel-return line.

Solenoid valve injectors for commercial vehicles made by Bosch are available for pressure levels between 1800 bar and 2500 bar. They are highly successful in the market and are used for all on and off-highway applications in medium-duty through to heavy-duty commercial vehicles. The injectors have a modular design and can be adapted to the customer's needs. The variants tailor-made for each application vary among others concerning lifetime, nozzle design, injector length, exterior injector design and compatibility with different fuels.

Features (CRIN Baseline with ball valve )

- Solenoid injector with ball valve

- Two piece armature leads to excellent dynamics due to reduced armature bouncing

- Available system pressure levels: 1600/1800/2000 bar

- Max. 5 injections per cycle

Customer benefits

- Market-specific solution for medium duty, heavy duty and off-highway for emerging markets

- Functionality and lifetime adapted to market requirement

- Compatibility of injector design allows same mounting and engine assembly as previous generation

- Robust ball-valve solenoid injectors

- Start-stop capability

- Robust design for selected standardized fuel qualitites

CRI is a diesel fuel injector for medium duty and off-highway derived from PC/LD-system with additional robustness packages and additional lifetime packages.

Features (CRI2 OHW )

- Solenoid injector with ball valve at 1600 bar or pressure balanced valve ≥ 1800 bar

- Available system pressure levels: 1600/ 1800/ 2000 bar

- Max. 5 injections per cycle (1600 bar),
max. 8 injections per cycle ≥ 1800 bar

Customer benefits

- Robust solution for all 4-6 cylinder diesel engines in medium duty and off-highway applications world wide

- Contribution to BS6,CN6, EU Stage V and comparable standards

- Functionality and lifetime adapted to market requirement

- Compatibility of injector design allows same mounting and engine assembly as previous generation

- Robust design for selected standardized fuel qualities

- Start-stop capability

- Single governor concept possible

Various types of common-rail pumps are available for a wide range of off-highway applications.

The high-pressure pump CPN6 delivers the fuel into the connected rail under high pressure. The pump camshaft is driven by the engine and moves the pump piston to generate the required high pressure.

The CPN6 high-pressure pump is based on the heavy-duty Bosch common-rail pumps, which have been produced in millions of units. Designed for heavy-duty applications, the pump handles pressure levels from 1800 to 2500 bar and is used for both on and off-highway. The variants tailor-made for each segment differentiate themselves regarding lubrication concept, fuel pre feed, fuel metering and maximum delivery quantity.

Demand-based delivery from tank to rail

Typically, the feed pump is connected to the fuel tank via a feed connection and delivers the fuel via a low-pressure outlet in the pressure-side filter. From the filter, the fuel is routed back into the high-pressure pump via a further low-pressure connection, before reaching the metering unit. The metering unit is connected electrically to the control unit and ensures the requirement-driven supply of the pump with fuel. The fuel lines lead from the high-pressure connectors on both high-pressure elements to the rail. Fuel which is no longer needed flows back into the tank via a further low-pressure connection.

Features (CPN6-family)

- For engines up to 16l high heavy duty

- Available pressure levels: 1800 / 2000 / 2500 bar

- Cam drive

- Two plungers in line

- Fuel or oil lubrication

Customer benefits

- Improved energetic efficiency with fuel lubrication concept

- Improved robustness with oil lubrication concept

- Weight reduced design compared to previous generation

- Pressure upgrade without change of outer shape of the pump

- Robust design for selected standardized fuel qualities

- Start-stop and hybrid capability

- Modular concept supports customer specific requirements

High pressure rail for common-rail systems

Precise fuel injection and reduced emissions

The high-pressure rail gives its name to the common-rail system and binds the pump and injectors together as the central hydraulic component. It stores the compressed fuel and supplies this to the injectors. A rail pressure sensor and - independent of the system configuration - an additional pressure control valve or pressure limiting valve are always fitted on the high-pressure rail as rail assembled components.

The rail consists of a forged steel tube into which the rail pressure sensor (RPS) and pressure control valve (PCV) are screwed. Independent of the high-pressure pump used, the rail has one or two fuel lines to connect to the high-pressure pump. Corresponding to the number of cylinders, further high-pressure connections for the fuel lines leading to the injector are present. The PCV-controlled fuel is conveyed back to the tank via the low-pressure connection.

Customized variants for every segment

High-pressure rails made by Bosch are available for pressure levels between 1400 bar and 2700 bar. They are used for all on-highway applications in cars up to heavy duty vehicles and for all off-highway applications. The rails have a modular construction and can be specifically adapted to the customer's needs or adjusted to the application specifications. The variants tailor-made for each application scenario differentiate themselves with regard to, for example, the rail assembled components, rail length, number of high-pressure connections, installation concept on the motor, and lifetime.

Various rail assembled components are fitted on the high-pressure rail depending on the system configuration. The rail pressure sensor (RPS) installed on the high-pressure rail communicates with the control unit. The transmitted pressure values serve to regulate the system pressure and control the injectors. The pressure control valve (PCV, PCVN) sets the system pressure supplied by the control unit in the rail. The pressure limiting valve (PLV) reduces the system pressure in case of overload and thus protects the other injection components from damage.

Features (Hot Forged Rail HFR )

-No. of cylinders: 1 to 8

-Available pressure levels: 1600 / 1800 / 2000 bar

-Length adaptable between 160 and 600 mm;
min. length 120 mm for short rails up to 1800 bar with RPS only

Customer benefits

-Market specific solution for 1 to 8 cylinder diesel engines for small medium duty (IN, CN, ASEAN) and off-highway applications

-Flexible modular concept allows easy adaption on customer packaging requirements with standardized customer interfaces

-Improved design reduces weight

-Robust design for selected standardized fuel qualities

-Start-stop and hybrid capability

-Identical basic design for all pressure levels

Each cylinder of an inline injection pump is supplied with fuel by an own pump element and via a pressure valve and a high-pressure line. The engine drives the pump’s camshaft by means of either gears or a chain. The pump runs synchronously with the pistons – that is, half as fast as the engine. To ensure this performance throughout hundreds of thousands of kilometers of operation, Bosch pump elements feature a particularly high material and production quality.

Pump elements consist of a pump piston and a pump cylinder. They work with overflow principle and beveled-edge control. Thanks to the high fitting accuracy of the pump piston, no special seal is required –not even in case of high pressures and low rotational speeds.

No matter whether contact surfaces, bores or threads, pump elements need to be processed thoroughly and with top precision to prevent pump damages affecting the operation of the engine. Bosch pump elements are produced according to a clearly defined quality guideline.

Advantages at a glance:

- As human eyes hardly see the details involved in the production of pump elements, being a Bosch product provides certainty and safety at the product selection

- Production with high precision prevents increased fuel consumption, loss of power and a shortened service life of both pump and engine as well as breakdowns and engine damage

Valves are among the most strained components of conventional and modern diesel injection systems. Therefore, the high quality of Bosch valves is particularly important. Especially valve pistons and pieces have to fit into one another accurately. As one of the world’s largest OE suppliers and diesel system developer, Bosch provides pressure valves with excellent quality both as original equipment and on the aftermarket.

Advantages at a glance:

- Low friction losses due to valve pistons and pieces perfectly fitting into one another

- Reduced surface roughness of valve sets due to accurate processing

- Increased service life and consumption benefits due to the use of high-tenacity materials – in part even with additional tempering or hard chromium plating

- Particularly high manufacturing precision due to stringent checks and permanent monitoring of the dimensional accuracy throughout the production

Injection nozzles are used in conventional and modern diesel systems to precisely atomize the fuel spraying it into the combustion chamber for an optimum combustion. Concomitantly, the nozzle also seals off the fuel system against the combustion chamber in a reliable manner. The versatile and broad range of Bosch nozzles covers all common applications. It includes comprehensive know-how Bosch bears as an important partner of international vehicle manufacturers.

Advantages at a glance:

- Production with very high precision due to moving parts’ guide clearance amounting to 0.002 mm and fuel pressures of up to 2000 bar

- Particularly long service life of Bosch nozzle needles due to their carbon coating

- Bosch injection nozzles prevent increasing smoke formation – especially after cold starting – as well as combustion noises with a cold engine, uneven engine performance and even loss of power or increased consumption

The unit pump injection system (UPS) injects the fuel into the engine cylinder. It consists of an electronically controlled unit pump and a nozzle holder assembly connected via a precisely adapted high-pressure line, which is proven for many years.

The unit pump system is a modular, time-controlled single-pump injection system. Each engine cylinder is supplied by a separate module consisting of a high-pressure plug-in pump with integrated, fast-switching solenoid valve and nozzle holder assembly. The unit pump is integrated in the diesel engine block and powered directly by an injection cam on the engine camshaft via a roller plunger.

A fuel pump (injection pump) is fitted for each engine cylinder. The pump piston is fitted in the pump cylinder with such precision that high injection pressure is guaranteed, even at low speeds. A 2/2-way valve provides the full range of functions. The valve closes against the high-pressure circuit with the fuel feed or outlet. The injection start and duration determined by the camshaft profile can be adapted as required. As a result, the injection pressures and delivery rates required for efficient combustion are available, even at low speeds. The nozzle holder assembly is selected to match the delivery rate, spray form and injection pressure.

The unit injector system (UIS) is a nozzle holder assembly with integrated high-pressure pump.

Features

- Injection pressure: up to 1800 bar

- Engine speed: up to 1200 rpm

- Specific power output engine:
UPS up to 350 kW/cyl. , UIS up to 210 kW/cyl.

Customer benefits

- Robust and reliable through proven series technology, therefore suitable for many applications

- Contribution to emission standards like EPA Tier 1/2, IMO 1/2, world bank emission limits - fulfillment of more stringent limits in combination with exhaust gas treatment possible

- Electronically control feasible with Large Engine- tailored engine control unit MD1CE200. Quick and variable adjustment of the injection quantity.

- Robust design for selected and standardized fuel qualities

- Design to cover to a wide range of multi-cylinder engine applications

- Remanufacturing established with wide range of spare parts

• Unit Injectors (UI)

The robust unit injector has an integrated high-pressure pump and injects the right amount of fuel required for efficient combustion into the cylinder. The electronically controlled, camshaft-driven unit injector generates a high fuel pressure using the integrated piston pump and injects exact quantities of fuel into the combustion chamber. The advantage of the unit injector system is that there is no high-pressure line between the high-pressure pump and injection nozzle.

The electronically controlled unit injector is a single-cylinder injection pump with integrated injection nozzle and solenoid valve that is installed directly in the cylinder head of the diesel engine. A separate injector is assigned to each engine cylinder. The unit injectors are powered by an injection cam on the engine camshaft via a rocker lever.

The injection start and quantity are determined by the fast switching solenoid valve, although these variables can be freely selected in the program. The solenoid valve is opened when not energized. This ensures a free passage from the fuel feed of the low-pressure system through the pump area and back into the low-pressure system in the cylinder head of the engine, which allows filling of the pump chamber during the suction stroke of the pump piston. This bypass is closed when the solenoid valve is energized during the delivery stroke of the pump piston. This causes pressure to build up in the high-pressure area and the injection of fuel into the engine's combustion chamber when the nozzle opening pressure is exceeded.

Please visit the Bosch Mobility Solutions Website for further information and interactive graphics.

Features

- Injection pressure: up to 1350 bar

- Max. engine speed: up to 950 rpm

- Specific power output engine: up to 210 kW/cyl.

Customer benefits

- Robust and reliable through proven series technology, therefore suitable for many applications

- Contribution to emission standards like e.g. EPA Tier 0/1, world bank emission limits

- Electronically controlled - quick and variable adjustment of the injection quantity

- Long service life allows sustainable product use

- Remanufacturing established with wide range of spare parts

- Retrofit of mechanical UI equipped engines to reduce fuel consumption feasible

• Unit Pumps (UP)

With high pressure, the unit pump ensures excellent mixture preparation and combustion of fuel with specific high performance, which contributes towards compliance with emission guidelines and a reduction in fuel consumption. The camshaft driven unit pump (UP) delivers fuel to the nozzle holder assembly, which injects the fuel directly into the combustion chamber.

If the solenoid valve is open, the pump cylinder can be filled during the suction stroke of the pump piston and return flow is possible during the delivery stroke. If the solenoid valve is energized and therefore closed, a pressure in the high-pressure range builds up between the pump piston and injection nozzle during the delivery stroke of the pump piston. If the nozzle opening pressure is exceeded, fuel is injected into the engine's combustion chamber. Closure of the solenoid valve determines the start of the injection process, while opening of the valve determines the injection quantity.

Please visit the Bosch Mobility Solutions Website for further information and interactive graphics

Features

- Injection pressure: up to 1800 bar

- Max. engine speed: up to 1200 rpm

- Specific power output engine: up to approx. 450 kW/cyl.

Customer benefits

- Robust and reliable through proven series technology, therefore suitable for many applications

- Electronically controlled. Quick and variable adjustment of the injection quantity.

- The UPS system can be tailored to various engine sizes and power output levels. Users can select the pump element as well as the drive, housing, and injection pressure as required.

- Design to cover to a wide range of multi-cylinder engine applications; typically locomotives, marine and gensets with 6, 8, 12 or 16 cylinders

- Long service life

- Remanufacturing allows sustainable product use

The MCRS is a modular common-rail system with injectors, high-pressure pump, and a ECU tailored for large engines.

The Modular Common-Rail System (MCRS) for large engines supports compliance with emissions standards and also offers savings potential. It ensures excellent mixture preparation and combustion of fuel with specific high performance to help reduce emissions and fuel consumption. The right injection system can be provided for all power outputs within a range of 50 to 450 kW/cylinder.

In high-speed and medium-speed large engines, the modular common-rail system MCRS is applied, mainly used for high and medium speed engines in stationary, construction & industry, maritime and railway applications.

For compact large engines, the common rail system CRSN for commercial vehicles can be used.

For special applications, mixed systems of CRSN and MCRS products can be provided.

The MCRS is a modular common-rail system. The electronically controlled, oil-lubricated type CP9 inline high-pressure pump is used to generate high pressure. The fuel is injected into the combustion chamber by a CRIN-LE injector. High-pressure accumulators are integrated into the pump and the injectors, which are damping pressure oscillations and ensure highly precise metering of the fuel. A separate rail is not required. The heart of the injection system is the electronic engine management that links the individual functions to form an overall system.

Better efficiency, lower emissions:

The MCRS offers all the benefits of Common Rail injection. It injects fuel at 1600 bar/ 2200 bar. Hydraulic pulsations in the high-pressure system are minimized thanks to the fuel storage volume in the high-pressure pump and injectors, which is specific to the MCRS. The fuel accumulator in the injector also ensures a nearly constant pressure, even during injection, as well as maximum flexibility during multiple injection. This means that the MCRS reduces fuel consumption and contributes to the compliance with stricter exhaust gas limits. The system is also very robust in every detail and boasts impressive service life.

In use around the world

The MCRS from Bosch is suitable for large diesel engines. It is the first fully modular Common Rail system for this kind of engine and is used by vehicle and engine manufacturers around the world. Thanks to its modular construction, it is extremely flexible and is used in large diesel engines from 4-cylinder inline engines up to 24-cylinder V engines.

Please visit the Bosch Mobility Solutions Website for further information and interactive graphics.

Features

- No. of cylinders: up to 24

- System pressure levels: 1600/ 2200 bar

- Injector with integrated accumulator volume, edge filter, flow limiter, and inline magnet valve

- Multi injection capability: up to 6 inj./cycle

- Pump (L2 – L5 type) with integrated accumulator volume and gear pump; single pump available for 1600 bar, too

- Control unit: MD1CE200, LE-specific

Customer benefits

- Fully modular design in injector, pumps and ECU, which can be tailored to various engine sizes and power outputs

- Power range: 500 kW to 5000 kW

- Contribution to emission standards up to EPA TIER 4, IMO 3 or Euro Stage V

- Ability for dual fuel operation: pilot injection for gas ignition feasible by MCRS

- Supports improvement of TCO by increased fuel efficiency and subsequently reduces CO2 output

- Provides flexibility to improve combustion strategy with high torque / power output, allows high dynamic engine operation

- High injection pressure independent of engine speed

- Robust design for selected and standardized fuel qualities

- Sustainable product use by remanufacturing and long service life

MCRS components

• CRIN-LE injector

The robust CRIN-LE common-rail injector injects exactly the right amount of fuel required for efficient combustion into the cylinder. The injector is permanently supplied with fuel via the high-pressure connection. The injection process is initiated by the control unit via the electrical connection. The high-pressure accumulator integrated in the injector allows a flexible engine design. The right injector can be provided for every power output within a range of 50 to 450 kW/cylinder.

The fast switching CRIN-LE injectors are a central component of the modular Common-Rail System (MCRS) and inject fuel into the cylinders for efficient combustion. Up to five individual injections are possible per injection cycle. The engine's fuel consumption as well as CO2, pollutant and noise emissions can be reduced using high injection pressure and multiple injections. A pressure accumulator integrated in the CRIN-LE injector ensures a consistently high injection pressure and reduces pressure fluctuations.

The solenoid valve with durable ball valve located near to the nozzle is actuated by the electronic control unit. The actuation causes the nozzle needle of the injector to open, allowing the fuel to be injected directly into the engine's combustion chamber.

Please visit the Bosch Mobility Solutions Website for further information and interactive graphics.

Features

- Available pressure levels: 1600 / 2200 bar

- Available in three nozzle flow-rate categories: T1 and T1+, T

- Up to 5 injections per injection cycle

- Supply voltage 24 V

Customer benefits

- Up to 450 kW/cyl. power output feasible

- Integrated accumulator volume reduces fuel pressure peaks, which results in a high mean effective injection pressure

- Integrated pressure wave damper enables multiple injection capability and reduces nozzle seat wear

- Variable injector length

- Multiple injection w/ small pilot injection quantities

- Robust design for selected and standardized specific fuel qualities

- No leakage / high efficiency

- Long service life

- Ability for dual fuel operation: pilot injection for gas ignition feasible

• CP9 inline high-pressure pump

The oil-lubricated CP9 high-pressure pump delivers the fuel into the piping system leading to the injector under high pressure. The CP9 consists of up to five high-pressure elements, each integrated in a housing with separate camshaft. The pump camshaft is driven by the engine and moves the pump piston to generate the required high pressure.

A pre-feed pump integrated in the high-pressure pump supplies fuel from the low-pressure side to the high-pressure pump. The volume is controlled by a metering unit installed on the suction side, which is regulated by the control unit and is responsible for supplying the pump with the required amount of fuel.

The camshaft is the central drive component. It drives the pump elements that generate the high pressure and delivers the fuel. The robust pump elements consist of pistons, cylinders, corresponding suction and pressure valves, including a seal element and a roller plunger that transfers the drive forces from the camshaft to the piston. The high-pressure accumulator integrated in the high-pressure pump allows for a flexible engine design, minimizes overpressure and guarantees a consistently high pressure in the injection system.

The CP9 is a highly successful common-rail pump on the large engine market. It has a modular construction and can be adapted to meet the engine's requirements. The CP9 is suitable for pressure levels ranging from 1600 to 2200 bar and is used for applications in the stationary engine, surface mining, marine and locomotive sectors, for example.

Please visit the Bosch Mobility Solutions Website for further information and interactive graphics.

Features

- Available pressure levels: 1600 / 2200 bar

- High-pressure pump can be scaled via the number of plungers

- Inline pump family from two up to five plungers (L2 - L5) with integrated fuel metering unit and gerotor (gear pump)

- Covers engine power of up to 5000 kW- depending on application using single or dual pump configuration

- Oil lubricated pump

Customer benefits

- Modular design offers greater flexibility

- Integrated accumulator volume reduces pressure peaks, which results in high mean effective injection pressure

- Economical and versatile due to modular design, which allows flexibility to engine layout

- Robust design for selected and standardized specific fuel qualities

- Long service life

- Remanufacturing allows sustainable product use

The basic configuration of the hot forged rail (HFRN) includes a rail pressure sensor (RPS).

Depending on the system/application and other specific requirements a pressure control valve (PCVN/PCVN2) or a pressure limiting valve (PLV4/PLV5) can be used additionally.

• Features

- No. of cylinders: 4 to 8

- Available pressure levels: 1600 / 1800 / 2000 / 2500 bar

- Length adaptable between 160 and 600 mm

• Customer benefits

- Market specific solution for 4 to 8 cylinder diesel engines in medium duty, heavy duty off-highway and large engine applications

- Flexible modular concept allows easy adaption on customer packaging requirements with standardized customer interfaces

- Improved design reduces weight

- Robust design for selected standardized fuel qualities

- Start-stop and hybrid capability

- Identical basic design for all pressure levels

Pressure Control Valve PCVN2

- Magnetic valve for rail pressure control and active rail pressure ramp down

- Current-less closed

- Allows pressure control and limp home functionality in one valve

• Features

- Available pressure levels: up to 2500 bar

- PCVN25 designed for battery energy management (BEM)

- Usage of PCVN25 or PCVN2-25 also depending on required max. flow rate and pressure characteristic in limp home operation

• Customer benefits

- Standardized hydraulic interface to rail for all pressure levels

- Robust design for selected standardized fuel qualities

- Market specific solution for diesel engines in medium duty, heavy duty, off-highway and large engine applications

- Applicable in all CRSN FIE

- Start-stop and hybrid capability

- Identical basic design for all pressure levels

Pressure Limiting Valve PLV4-6

- Mechanical security valve to avoid improper FIE pressure levels in failure case.

- In failure case system pressure level will be reduced to limp home pressure level

• Features of PLV4

- Available pressure levels: 1400 / 1600 / 1800 bar

- Designed for max. 50 operation sequences over lifetime

- Limp home functionality allows to reach the garage in failure case with reduced power

- Limp home pressure depending on nominal pressure level

• Features of PLV5

- Available pressure level: 2000 bar

- Designed for max. 50 operation sequences over lifetime

- Limp home functionality allows to reach the repair shop in failure case with reduced power

- Limp home pressure depending on nominal system pressure level

- Identical outer dimensions for all pressure levels

• Features of PLV6 (MCRS)

- Available pressure level: 2200 bar

- Max. flow rate: 1200 l/h

- Designed for max. 50 operation sequences over lifetime

- Limp home functionality allows to reach the service in failure case with reduced power

- Limp home pressure depending on nominal pressure level

• Customer benefits

- Standardized hydraulic interface of all PLV generations to rail for all pressure levels

- Applicable in all CRSN FIE and CRS off-highway FIE

- Increase of system security

- Avoidance of overload of FIE-components in failure case

- Robust design for selected standardized fuel qualities

- Identical outer dimensions for all pressure levels

- Applicable in all MCRS fuel injection systems

Rail Pressure Sensor RPS4

- Electric sensor to measure the rail pressure level

- Stainless steel sensing element with metals thin film strain gauges

- Digital circuit concept with analogue output signal

• Features at a glance of RPS4:

- Available pressure levels: 1800 / 2000 / 2500 bar (2700 bar for PC/LD)

- Variants for different voltage outputs available

- Fault diagnostic using signal range check

- Variants with dual sensing element concept available to meet OBD II requirements

- Identical outer dimensions for all pressure levels

• Customer benefits

- Standardized hydraulic interface of all RPS4 versions to rail for all pressure levels

- Cost optimized design

- Product design for selected standardized fuel qualities

- Applicable in all CRS(N) FIE and CRS off-highway FIE

- Resistant to media, hermetic sealing against measured media

- Vibration resistant, high thermal stability