Pressure-amplified common rail system for commercial vehicles


The key to a successful layout of a combustion system for commercial vehicles is in the management of peak torque operation points. For this purpose, Bosch has enhanced its Common Rail System with increasing degrees of freedom — i.e. with flexible rate shaping. A second solenoid valve activates a pressure-amplifier inside the injector, an optimized offset of nozzle needle timing reduces the injection rate by half right at the start of injection, and the formation of nitrogen oxide is reduced considerably. This enables the engine manufacturer to adhere to the emission limits while further reducing fuel consumption and the engine-related effort for the air sytem.

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Correspondence to Dr. Rolf Leonhard.

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Leonhard, R., Parche, M., Alvarez-Avila, C. et al. Pressure-amplified common rail system for commercial vehicles. MTZ Worldw 70, 10–15 (2009).

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  • Solenoid Valve
  • Commercial Vehicle
  • Common Rail
  • Noise Emission
  • Rail Pressure