Exhaust gas purification system for hybrid vehicle
First Claim
1. An exhaust gas purification system for a hybrid vehicle comprising:
- an internal combustion engine and an electric motor each arranged for providing power output for the vehicle,an exhaust gas purification device disposed in an exhaust passage of the engine to treat exhaust gas components contained in exhaust gas from the engine,a controller arranged and configured to selectively perform a regeneration operation of the exhaust gas purification device to burn and remove deposits accumulated in the exhaust gas purification device, andthe controller further arranged and configured to control the engine and the electric motor such that the exhaust gas purification device is restrained from reaching an excessive temperature during the regeneration operation of the exhaust gas purification device,a section to determine the excessive temperature of the exhaust gas purification device, andwherein when the excessive temperature of the exhaust gas purification device is detected during the regeneration operation, the engine is controlled to increase the power output with a rich air-fuel ratio operation and an excess power output caused by the increase in the power output of the engine is used to generate electric power by the electric motor.
1 Assignment
0 Petitions
Accused Products
Abstract
An exhaust gas purification system for a hybrid vehicle is disclosed. An internal combustion engine and an electric motor are each arranged for providing power output for the vehicle. An exhaust gas purification device is provided in an exhaust gas passage of the engine to treat exhaust gas components contained in the exhaust gas from the engine. A controller is arranged and configured to selectively perform a regeneration operation of the exhaust gas purification device to burn and remove deposits accumulated in the exhaust gas purification device. The controller is further arranged and configured to control the internal combustion engine and the electric motor such that the exhaust gas purification device is restrained from reaching an excessive temperature during the regeneration operation of the exhaust gas purification device.
19 Citations
23 Claims
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1. An exhaust gas purification system for a hybrid vehicle comprising:
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an internal combustion engine and an electric motor each arranged for providing power output for the vehicle, an exhaust gas purification device disposed in an exhaust passage of the engine to treat exhaust gas components contained in exhaust gas from the engine, a controller arranged and configured to selectively perform a regeneration operation of the exhaust gas purification device to burn and remove deposits accumulated in the exhaust gas purification device, and the controller further arranged and configured to control the engine and the electric motor such that the exhaust gas purification device is restrained from reaching an excessive temperature during the regeneration operation of the exhaust gas purification device, a section to determine the excessive temperature of the exhaust gas purification device, and wherein when the excessive temperature of the exhaust gas purification device is detected during the regeneration operation, the engine is controlled to increase the power output with a rich air-fuel ratio operation and an excess power output caused by the increase in the power output of the engine is used to generate electric power by the electric motor. - View Dependent Claims (2, 3, 4, 5, 6, 10, 11, 12)
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7. The exhaust gas purification system under 5, wherein
the control for increasing the power output of the engine is carried out after the state of charge of the battery has dropped below a first level and until the state of charge of the battery increases to a second level that is set higher than the first level.
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13. An exhaust gas purification system for a hybrid vehicle comprising:
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an internal combustion engine and an electric motor each arranged for providing power output for the vehicle, an exhaust gas purification device disposed in an exhaust passage of the engine to treat exhaust gas components contained in exhaust gas from the engine, a controller arranged and configured to selectively perform a regeneration operation of the exhaust gas purification device to burn and remove deposits accumulated in the exhaust gas purification device, the controller further arranged and configured to control the engine and the electric motor such that the exhaust gas purification device is restrained from reaching an excessive temperature during the regeneration operation of the exhaust gas purification device, a battery arranged and configured to be selectively charged with electric power generated by the electric motor that is capable of being driven by the engine, wherein a rotational speed of the engine is increased by an increase in the power output of the electric motor to prevent the exhaust gas purification device from reaching the excessive temperature, when the regeneration operation of the exhaust gas purification device is completed, and wherein the controller is further arranged and configured to control the engine by an increase in the power output of the engine to increase a state of charge of the battery before the increase in the power output of the electric motor to prevent the exhaust purification device from reaching the excessive temperature, wherein the controller stops a supply of fuel to the engine when the rotational speed of the engine is increased by the increase in the power output of the electric motor. - View Dependent Claims (14, 15, 16, 17)
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18. An exhaust gas purification system for a hybrid vehicle comprising:
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an internal combustion engine and an electric motor each arranged for providing power output for the vehicle, an exhaust gas purification device disposed in an exhaust passage of the engine to treat exhaust gas components contained in exhaust gas from the engine, a controller arranged and configured to selectively perform a regeneration operation of the exhaust gas purification device to burn and remove deposits accumulated in the exhaust gas purification device, the controller further arranged and configured to control the engine and the electric motor such that the exhaust gas purification device is restrained from reaching an excessive temperature during the regeneration operation of the exhaust gas purification device, a battery arranged and configured to be selectively charged with electric power generated by the electric motor that is capable of being driven by the engine, wherein a rotational speed of the engine is increased by an increase in the power output of the electric motor to prevent the exhaust gas purification device from reaching the excessive temperature, when the regeneration operation of the exhaust gas purification device is completed, wherein the controller is further arranged and configured to control the engine by an increase in the power output of the engine to increase a state of charge of the battery before the increase in the power output of the electric motor to prevent the exhaust purification device from reaching the excessive temperature, wherein the state of charge of the battery is controlled to a target charge value that is determined based upon an amount of the deposits accumulated in the exhaust gas purification device. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification