Diesel systems for railways
In railway operation, the diesel engine can serve as drive engine and as generator. Bosch has the right technology for various applications and different emission regulations.
Electronic Diesel Control (EDC) regulates the functions of the injection system in such a way that the engine provides the demanded engine torque. The injection parameters are constantly matched to the engine and the driving situation. Engines with an electronically controlled diesel system from Bosch combine maximum dynamic performance with minimum fuel consumption and emissions.
- Cleaner and economical engine operation thanks to the rapid adaptation of all injection parameters
UPS Unit Pump System
The Unit Pump System (UPS) consists of electronically controlled single cylinder pumps and nozzle-holder assemblies. Injection pressure is up to 1,800 bar at the nozzle. Each engine cylinder is equipped with one fuel pump. A pressure balanced 2/2 way valve enables a variable start of injection which is limited by the camshaft profile.
The nozzle-holder assembly for both pump types is selected depending on supply quantity, spray shape and injection pressure.
- Established system
- Electronically controlled. Quick and infinitely variable adjustment of the injection quantity
- Highly robust, therefore suitable for many applications
Modular Common Rail System
Bosch offers the first fully modular Common Rail Systems for operation in large off-highway diesel engines. Instead of the high-pressure rail these systems feature specific fuel-storage volumes in the high-pressure pump and the injectors.
High pressure is generated by single-cylinder pumps or inline pumps. The number of pump cylinders always corresponds to that of the diesel engine. The pumps comprise an integrated high-pressure accumulator, pressure sensor and pressure safety valve.
The high-pressure injectors are each equipped with their own high-pressure accumulator, safety flow limiter and solenoid valve for multiple injection. Because the injectors are connected with one another using short high-pressure lines, modular Common Rail Systems are particularly versatile.
- High injection pressure independent of engine speed
- Lower operating noise
- Reduced fuel consumption
- Adherence to stricter emission limits
- Adaptation to exhaust-gas treatment possible
- Long lifetime