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US 9,963,142 B2Granted
Driving device for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorNoritaka Takuda
Life of this patent
Estimating the term…
Abstract
A vehicle includes an engine, a first MG (motor generator), a second MG, a planetary gear mechanism provided among the engine, the first MG and the second MG, a battery, and an ECU. The ECU executes batteryless travel control when the battery is abnormal. The batteryless travel control includes engine F/B control for controlling a rotation speed of the engine to become a target rotation speed, and power balance control for controlling a requested driving force to be output and allowing a power generated by the first MG to become equal to a power discharged by the second MG. When the rotation speed of the engine is higher than a threshold speed higher by a prescribed value than the target rotation speed while the batteryless travel control is in execution, the ECU decreases the requested driving force.
Claims3
A driving device for a vehicle, comprising:
- an engine;
- a first rotating electric machine;
- a second rotating electric machine connected to a driving wheel;
- a planetary gear mechanism having a rotating element connected to the engine, a rotating element connected to the first rotating electric machine, and a rotating element connected to the second rotating electric machine, the planetary gear mechanism mechanically connecting the engine, the first rotating electric machine and the second rotating electric machine such that when a rotation speed of one of the engine and the first rotating electric machine decreases in a case where a rotation speed of the second rotating electric machine is constant, a rotation speed of the other of the engine and the first rotating electric machine decreases;
- a battery configured to be electrically connectable to the first rotating electric machine and the second rotating electric machine;
- and
- a controller configured, when the battery is abnormal, to disconnect the battery from the first rotating electric machine and the second rotating electric machine and to execute batteryless travel control,
- the batteryless travel control being control that executes:
- (i) engine feedback control for executing feedback control of the engine such that the rotation speed of the engine becomes a target rotation speed;
- and
- (ii) power balance control for controlling the first rotating electric machine and the second rotating electric machine such that a power corresponding to a requested driving force is transmitted to the driving wheel and a power generated by the first rotating electric machine becomes equal to a power consumed by the second rotating electric machine, and
- when the rotation speed of the engine is higher than a threshold speed higher than the target rotation speed during the batteryless travel control, the controller being configured to set a value of the requested driving force used for the power balance control to be smaller than that when the rotation speed of the engine is lower than the threshold speed.
9 more elements
A driving device for a vehicle, comprising:
- an engine;
- a first rotating electric machine;
- a second rotating electric machine connected to a driving wheel;
- a planetary gear mechanism having a rotating element connected to the engine, a rotating element connected to the first rotating electric machine, and a rotating element connected to the second rotating electric machine, the planetary gear mechanism mechanically connecting the engine, the first rotating electric machine and the second rotating electric machine such that when a rotation speed of one of the engine and the first rotating electric machine decreases in a case where a rotation speed of the second rotating electric machine is constant, a rotation speed of the other of the engine and the first rotating electric machine decreases;
- a battery configured to be electrically connectable to the first rotating electric machine and the second rotating electric machine;
- and
- a controller configured, when the battery is abnormal, to disconnect the battery from the first rotating electric machine and the second rotating electric machine and to execute batteryless travel control,
- the batteryless travel control being control that executes:
- (i) engine feedback control for executing feedback control of the engine such that the rotation speed of the engine becomes a target rotation speed;
- and
- (ii) power balance control for controlling the first rotating electric machine and the second rotating electric machine such that a power corresponding to a requested driving force is transmitted to the driving wheel and a power generated by the first rotating electric machine becomes equal to a power consumed by the second rotating electric machine, and
- when the rotation speed of the engine is higher than a threshold speed higher than the target rotation speed and the requested driving force is greater than a threshold driving force during the batteryless travel control, the controller being configured to execute at least one of a first process and a second process, the first process being a process for decreasing a gain used for the engine feedback control as compared with the gain at least one of when the rotation speed of the engine is lower than the threshold speed and when the requested driving force is smaller than the threshold driving force, the second process being a process for increasing the target rotation speed as compared with the target rotation speed at least one of when the rotation speed of the engine is lower than the threshold speed and when the requested driving force is smaller than the threshold driving force.
9 more elements
Dependencies are inferred from the claim text.