| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine capable of more securely emitting NOx in forcedly setting an exhaust air-fuel ratio rich to emit NOx from NOx absorbing material by use of a turbo charger with a motor. <P>SOLUTION: This control device for an internal combustion engine is provided with the NOx absorbing material (NOx storage reduction catalyst) 29 which absorbs nitrogen oxide NOx when an exhaust air-fuel ratio is lean, and which emits NOx when it is rich or stoichiometric, a turbo charger 11 disposed to be attached on the internal combustion engine, the motor 11b capable of changing supercharge pressure by rotating a turbine/compressor 11 by exhaust currents, and performing regenerative power generation by exhaust energy, and motor control means 16 and 21 to control the motor 11b. The motor control means 16 and 21 controls the motor 11b to reduce intake air quantity when the exhaust air-fuel ratio is set rich to emit NOx from the NOx absorbing material 29. <P>COPYRIGHT: (C)2004,JPO |
