Control device for a hybrid electric vehicle
First Claim
1. A control device for a hybrid electric vehicle arranged such that a driving force of an electric motor can be transmitted to driving wheels and that a rotary shaft of the electric motor can be coupled with an output shaft of an engine, comprising:
- a starter motor provided separately from the electric motor and capable of starting the engine by transmitting a driving force to the output shaft of the engine;
a battery that supplies electric power to the electric motor;
an electric power source provided separately from the battery to supply electric power to the starter motor;
a braking force maintaining means configured to be activated by electric power from the electric power source to maintain a braking force on the vehicle;
an abnormality detection means for detecting a specified abnormal condition which makes the starting of the engine by the electric motor impracticable; and
a control means which, in a case where a request for starting the engine is made, if the abnormality detection means does not detect the abnormal condition, causes the engine to be started by the electric motor, and if the abnormality detection means detects the abnormal condition, causes the engine to be started by the starter motor when the braking force maintaining means is not active.
1 Assignment
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Accused Products
Abstract
A hybrid electric vehicle is arranged such that a driving force of an electric motor can be transmitted to driving wheels and that a rotary shaft of the electric motor can be coupled with an output shaft of an engine. The vehicle comprises a starter motor provided separately from the electric motor, an electric power source provided separately from a battery that supplies power to the electric motor, to supply power to the starter motor, and a braking force maintaining device configured to be activated by power from the power source to maintain a braking force on the vehicle. When a request for starting the engine is made, if a specified abnormal condition which makes the starting of the engine by the electric motor impracticable is detected, an ECU causes the engine to be started by the starter motor when the braking force maintaining device is not active.
32 Citations
5 Claims
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1. A control device for a hybrid electric vehicle arranged such that a driving force of an electric motor can be transmitted to driving wheels and that a rotary shaft of the electric motor can be coupled with an output shaft of an engine, comprising:
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a starter motor provided separately from the electric motor and capable of starting the engine by transmitting a driving force to the output shaft of the engine; a battery that supplies electric power to the electric motor; an electric power source provided separately from the battery to supply electric power to the starter motor; a braking force maintaining means configured to be activated by electric power from the electric power source to maintain a braking force on the vehicle; an abnormality detection means for detecting a specified abnormal condition which makes the starting of the engine by the electric motor impracticable; and a control means which, in a case where a request for starting the engine is made, if the abnormality detection means does not detect the abnormal condition, causes the engine to be started by the electric motor, and if the abnormality detection means detects the abnormal condition, causes the engine to be started by the starter motor when the braking force maintaining means is not active. - View Dependent Claims (2, 3, 4, 5)
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Specification