| 摘要 |
A multi-cylinder Otto cycle internal combustion direct compound engine for motor vehicles with an exhaust-gas turbocharger (47) providing direct turbo compounding upon the engine control module (28) receiving a speed signal indicating that the vehicle is travelling in a predetermined cruise-speed mode. Upon receipt of the signal the module (28) turns-off each fuel injector (21-24) feeding a second group of the cylinders (13,14), while maintaining fuel injection to a first group of cylinders (11,12) and fully opening the electronic intake-air induction throttle (34). As a result pistons of the unfired second group of cylinders (13,14) are driven solely by compressed inlet-air pressure during the time the vehicle travels at or above a predetermined light-load cruising-speed, while positive pumping work occurs in all the cylinders. The engine thus conserves fuel during light load cruising speed while maintaining low pollutant emissions. <IMAGE> |
