The HDEV5 high-pressure injection valve and the HDP5 high-pressure pump
Motronic for direct injection comprises a high-pressure pump, high-pressure rail with injection valve, and engine control unit. If mixture formation is homogeneous, the HDEV5 high-pressure injection valve makes a major contribution to optimum, and thus fuel efficient combustion. Up to seven individually positioned injection holes enable the spray pattern to be adapted flexibly to different combustion chambers. The high-pressure injection valve and the high-pressure pump are designed for system pressures up to 200 bar. The demand-controlled HDP5 high-pressure pump is characterised by its compact dimensions and its light weight of 780 grams. Thanks to the use of stainless steel, the current components of the gasoline direct injection system can handle ethanol blends as well as fuels of varying quality, and are thus designed for worldwide use.
Downsizing engines with turbochargers
In combination with turbocharging, gasoline direct injection allows internal-combustion engines to be downsized. In downsized engines, lower displacement and fewer cylinders mean lower friction losses, and thus lower consumption. Moreover, this is achieved without sacrificing torque and performance. Bosch will be manufacturing modern turbocharging systems for these new engine designs from late 2011, in its Bosch Mahle Turbo Systems joint venture.