Internal combustion engine having a variable valve train

• Main Authors: MATSUMOTO, ISAO, SAITOH, MITSURU, OGISO, MAKOTO
• Format: Patent
• Language: English; French; German
• Published: 04.03.2009
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BLASTING; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; STEAM ENGINES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL; WEAPONS

An internal combustion engine having a variable valve train (30, 31) capable of adjusting opening/closing timing and/or an opening amount of at least one of an intake valve (28) and an exhaust valve (29) of the internal combustion engine and a throttle valve (39) for adjusting an amount of intake air flowing through an intake passage (33, 34, 35) of the internal combustion engine, comprises engine control means (20) for controlling the variable valve train (30, 31) such that pump efficiency of the internal combustion engine is increased and for closing the throttle valve (39) by a predetermined amount when a predetermined condition is satisfied. The engine control means (20) controls the variable valve train (30, 31) and closes the throttle valve (39) such that occurrence of torque fluctuation in the internal combustion engine is prevented when said predetermined condition is satisfied.