Hybrid vehicle and control method thereof
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYuki Nose, Masaaki Kobayashi
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Abstract
A hybrid vehicle includes a multi-cylinder engine, an exhaust gas control apparatus, an electric motor, an electricity storage device, and a controller. The controller is configured to control the electric motor so as to cover a driving power shortage resulting from execution of catalyst temperature raising control. The catalyst temperature raising control is control that involves stopping fuel supply to at least one of cylinders of the multi-cylinder engine and enriching air-fuel ratios for the other cylinders than the at least one cylinder.
Claims10
A hybrid vehicle comprising:
- a multi-cylinder engine;
- an exhaust gas control apparatus including a catalyst configured to remove harmful components of exhaust gas from the multi-cylinder engine;
- an electric motor;
- an electricity storage device configured to exchange electricity with the electric motor;
- and
- a controller configured to
- execute catalyst temperature raising control upon a request for raising a temperature of the catalyst during load operation of the multi-cylinder engine in the hybrid vehicle in which at least one of the multi-cylinder engine or the electric motor is configured to output driving power to a wheel, and
- control the electric motor so as to cover a driving power shortage resulting from execution of the catalyst temperature raising control, wherein
- the catalyst temperature raising control involves stopping fuel supply to at least one cylinder of cylinders of the multi-cylinder engine and enriching air-fuel ratios for other cylinders of the cylinders of the multi-cylinder engine, the other cylinders being different from the at least one cylinder, and
- the controller is configured to, in response to determining that the driving power shortage resulting from the execution of the catalyst temperature raising control is not coverable by the electric motor, prohibit the execution of the catalyst temperature raising control when the catalyst temperature raising control has not started.
A control method of a hybrid vehicle, the hybrid vehicle including a multi-cylinder engine, an exhaust gas control apparatus including a catalyst configured to remove harmful components of exhaust gas from the multi-cylinder engine, an electric motor, and an electricity storage device configured to exchange electricity with the electric motor, at least one of the multi-cylinder engine or the electric motor being configured to output driving power to a wheel, the control method of the hybrid vehicle comprising:
- upon a request for raising a temperature of the catalyst during load operation of the multi-cylinder engine, executing catalyst temperature raising control that involves stopping fuel supply to at least one cylinder of cylinders of the multi-cylinder engine and enriching air-fuel ratios for other cylinders of the cylinders of the multi-cylinder engine, the other cylinders being different from the at least one cylinder;
- controlling the electric motor so as to cover a driving power shortage resulting from execution of the catalyst temperature raising control;
- and
- in response to determining that the driving power shortage resulting from the execution of the catalyst temperature raising control is not coverable by the electric motor, prohibiting the execution of the catalyst temperature raising control when the catalyst temperature raising control has not started.
Dependencies are inferred from the claim text.