Automotive vehicle engine with cylinder suspending mechanism for switching between a partial-cylinder non-working mode and an all-cylinder working mode depending on running conditions of the engine

摘要

PCT No. PCT/JP92/01717 Sec. 371 Date Aug. 18, 1993 Sec. 102(e) Date Aug. 18, 1993 PCT Filed Dec. 25, 1992 PCT Pub. No. WO93/13311 PCT Pub. Date Jul. 8, 1993.The present invention relates to an automotive vehicle engine having controls for switching between a whole cylinder working mode and a partial cylinder non-working mode by making a valve motion arrangement operated in the intake and exhaust process. The automotive vehicle engine comprises-a revolution sensor, a boost pressure sensor, an ignition driving apparatus and a controlling apparatus for controlling the cylinder suspending mechanism and the ignition driving apparatus. The partial cylinder non-working mode or the all cylinder working mode is determined on the basis of the revolution speed "Ne" and the boost pressure data "Pb". An ignition timing retard process and an idle speed shifting-up process are performed so as to control the torque variation of the engine caused at the time when the all cylinder working mode is switched to the partial cylinder non-working mode or when the partial cylinder non-working mode is switched to the all cylinder working mode, thereby preventing torque shock from occurring and thereby preventing the engine from stopping and enhancing drivability.