| 摘要 |
PROBLEM TO BE SOLVED: To reduce torque shock felt by a driver, when opening of a throttle valve is changed since switching of a combustion air-fuel ratio is required without changing engine output. SOLUTION: A throttle valve control device for an internal combustion engine provided with at least a first cylinder group B1 and a second cylinder group B2 comprises: a first throttle valve S1 disposed to an intake passage 31 of the first cylinder group; and a second throttle valve S2 disposed to an intake passage 32 of the second cylinder group. When the switching of the combustion air-fuel ratio of the internal combustion engine without changing the engine output is required, the opening of the first throttle valve is changed so as to switch the combustion air-fuel ratio of the first cylinder group, and the opening of the second throttle valve is changed so as to switch the combustion air-fuel ratio of the second cylinder group after the first throttle valve. COPYRIGHT: (C)2008,JPO&INPIT
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