INTERNAL COMBUSTION ENGINE AND ITS CONTROL METHOD AND POWER OUTPUT UNIT

• Main Author: SUGAI SHINICHI
• Format: Patent
• Language: English
• Published: 07.10.2008
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; COMBUSTION ENGINES; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; CONTROLLING COMBUSTION ENGINES; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

When operation of an engine is stopped, rotation of the engine is lowered smoothly after elapsing a predetermined time of self sustaining operation of the engine at stop rotation speed. Nstop, and lowering of the rotation speed Ne of the engine is started (S100, S140, S150, S170, S180) by setting a lowering vibration suppressing torque for suppressing a vibration produced incident to lowering of rotation as the torque command Tm1* of a motor MG1. A correction torque Tmod is then set (S200) based on the crank angle CA and the engine water temperature Tw when the rotation speed Ne reaches a threshold Nref, and the set correction torque Tmod is added to the lowering vibration suppressing torque at lowering to set the added value as the torque command Tm1* of the motor MG1 (S210). The engine is prevented from exceeding the top dead center immediately before stopping and vibration otherwise caused by exceeding the top dead center is suppressed.