Vehicle, method and device for controlling engine
First Claim
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1. A hybrid vehicle comprising:
- an engine;
a power storage device;
an electric motor to generate a vehicle driving force by being supplied with an electric power from said power storage device; and
a control unit programmed to control said hybrid vehicle in one of a CS (Charge Sustaining) mode and a CD (Charge Depleting) mode, whereineach of said CD mode and said CS mode has both a state in which said engine is driven and a state in which said engine is stopped,wherein said control unit controls the hybrid vehicle in said CS mode using either;
a first condition for permitting a suspension of said engine which is already started, in a case where said engine is started after said hybrid vehicle is switched to be controlled in said CS mode due to decrease in a state of charge of said power storage device while said hybrid vehicle is controlled in said CD control mode, ora second condition for permitting the suspension of said engine, in a case where said engine is started while said hybrid vehicle is controlled in said CS control mode since a point in time when said control unit was activated, andsaid first condition is set such that it is more difficult to suspend the engine which is already started, compared with said second condition.
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Abstract
A vehicle provided with a motor generator as a driving source includes a battery to supply electric power to the motor generator, an engine, and an ECU to control the vehicle in one of a CS mode and a CD mode in which opportunity for operation of the engine is limited compared to in the CS mode. The ECU controls the engine in accordance with a condition different from a condition used to control the engine in the CS mode, if the engine is started at least due to decrease in a state of charge of the battery while the vehicle is controlled in the CD mode.
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Citations
9 Claims
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1. A hybrid vehicle comprising:
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an engine; a power storage device; an electric motor to generate a vehicle driving force by being supplied with an electric power from said power storage device; and a control unit programmed to control said hybrid vehicle in one of a CS (Charge Sustaining) mode and a CD (Charge Depleting) mode, wherein each of said CD mode and said CS mode has both a state in which said engine is driven and a state in which said engine is stopped, wherein said control unit controls the hybrid vehicle in said CS mode using either; a first condition for permitting a suspension of said engine which is already started, in a case where said engine is started after said hybrid vehicle is switched to be controlled in said CS mode due to decrease in a state of charge of said power storage device while said hybrid vehicle is controlled in said CD control mode, or a second condition for permitting the suspension of said engine, in a case where said engine is started while said hybrid vehicle is controlled in said CS control mode since a point in time when said control unit was activated, and said first condition is set such that it is more difficult to suspend the engine which is already started, compared with said second condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of controlling a hybrid vehicle including an engine , a power storage device and an electric motor to generate a vehicle driving force by being supplied with an electric power from said power storage device comprising the steps of:
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controlling, by a control unit, said hybrid vehicle in one of a CS (Charge Sustaining) mode and a CD (Charge Depleting) mode; and controlling in the CS mode, by the control unit, said engine in a first condition or a second condition; wherein the first condition permits a suspension of said engine which is already started, in a case where said engine is started after said hybrid vehicle is switched to be controlled in said CS mode due to decrease in a state of charge of said power storage device while said hybrid vehicle is controlled in said CD control mode, wherein the second condition permits the suspension of said engine, in a case where said engine is started while said hybrid vehicle is controlled in said CS control mode since a point in time when said control unit was activated, wherein each of said CD mode and said CS mode has both a state in which said engine is driven and a state in which said engine is stopped, and said first condition is set such that it is more difficult to suspend the engine which is already started, compared with said second condition.
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9. A device of controlling an engine incorporated in a hybrid vehicle provided with a power storage device and an electric motor to generate a vehicle driving force by being supplied with an electric power from said power storage device, comprising:
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means for controlling said hybrid vehicle in one of a CS (Charge Sustaining) mode and a CD (Charge Depleting) mode and means for controlling said engine in said CS mode in a first condition or a second condition, wherein the first condition permits a suspension of said engine which is already started, in a case where said engine is started after said hybrid vehicle is switched to be controlled in said CS mode due to decrease in a state of charge of said power storage device while said hybrid vehicle is controlled in said CD control mode, wherein the second condition permits the suspension of said engine, in a case where said engine is started while said hybrid vehicle is controlled in said CS control mode since a point in time when said control unit was activated, wherein each of said CD mode and said CS mode has both a state in which said engine is driven and a state in which said engine is stopped, and said first condition is set such that it is more difficult to suspend the engine which is already started, compared with said second condition.
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Specification