Modular Common Rail System MCRS-T
Customer benefits
 High injection pressure independent of engine speed
 Lower operation noise
 Reduced fuel consumption
 Adherence to stricter emission limits
 Reduced efforts in exhaust-gas treatment
 Long lifetime
Unique in the world, Bosch is the only company to offer diesel injection systems and components for applications from the smallest passenger-car engines to the largest medium-speed heavy fuel oil engines.
Bosch offers injection equipment for large diesel engines in all regions and to many well-known customers. Large diesel engines are usually defined by a rated power larger than 560 kW.
Operating principle
The MCRS-specific fuel-storage volume in the highpressure pump and the injectors minimizes hydraulic pulsations in the high-pressure system, which enables a simple modular system layout. The fuel accumulator inside the injector ensures a nearly constant pressure during injection and guarantees maximum flexibility for multiple injections.
For medium-speed diesel engines, one of the changes to the MCRS platform is the addition of larger solenoid valves and nozzles.
The MCRS opens potentials for the development of fuel-efficient engines. This leads to a significant competitive advantage for our customers. Additional reductions in emissions and fuel consumption are possible by further increasing the pressure from the current 1,600 bar to 2,200 bar in the future.
Large diesel engines with a displacement of more than
2.5 liters per cylinder can be equipped with a Modular
Common Rail System (MCRS). This system features a wide range of possible applications and offers all benefits of Common Rail injection technology.
Possible applications
With the MCRS series, Bosch offers the first fully modular Common Rail Systems for operation in large diesel engines. Typical applications for the MCRS-T are locomotives, cargo ships, and generator sets. In order to guarantee reliable operation even with fuels of low lubricity, high-pressure pumps and injectors are designed to be particularly robust. The system sets standards regarding robustness, hydraulic efficiency and the ability to generate multiple injections.

Diesel Systems | Modular Common Rail System MCRS-T for large diesel engines
Technical features (application example)
Max. system pressure 1,600 bar
Number of injections 3
Fuel mass delivered CP9.2 9 l/min
Operating voltage
Control unit
Lifetime
Fields of application
1
4
24 V
Engine manufacturer or Bosch
20,000 h
Marine, locomotives,
Max. engine power gensets
500 kW/cyl.
Max. engine speed 1,400 rpm
Max. number of cylinders 20
Components MCRS-T system
5
1
2
3
CP9.2 high-pressure pump
Metering unit
CRIN-LE-T injector
5 EDC17CV41 electronic control unit
2
3
System design
The Bosch MCRS-T is a Common Rail System in a modular design for large diesel engines which does not require a separate rail. The electronically controlled and oil-lubricated CP9.2-type high-pressure single- cylinder pump generates high pressure. Depending on performance requirements up to three pumps per engine can be used.
Fuel is injected into the combustion chamber by a
CRIN-LE-type injector. The injector is equipped with a high-pressure accumulator, a safety flow limiter and a solenoid valve. The injectors are connected one to another using short high-pressure lines (also doublewalled), therefore the MCRS-T is particularly flexible.
Its special design incorporating high-pressure accumulators inside the pump and the injector plus short high-pressure lines minimizes pressure pulsations.
This secures constant injection pressure at the nozzle even for multiple injections.
The Bosch EDC17CV41 electronic engine control unit is suitable for installation close to the engine.
Modular system
The injection system can easily be adapted to different engine types on the basis of a modular system: the number and size of injectors and pumps is varied accordingly.
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© Robert Bosch GmbH 2014. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights
Robert Bosch GmbH
Diesel Systems
Postfach 30 02 20
70442 Stuttgart
Germany diesel@bosch.com
www.bosch-diesel.de
Printed in Germany
292000P1A2-C/CCA-201409-En