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US 10,710,447 B2Granted
Hybrid vehicle drive system
AssigneeHonda Motor Co., Ltd.
InventorTakahiro Kasahara
Life of this patent
Estimating the term…
Abstract
A drive system of a hybrid vehicle including an internal combustion engine, a first motor-generator, a power transmission path, a power division mechanism, a second motor-generator, a one-way clutch, a mode change mechanism, and an electronic control unit having a microprocessor and memory. The microprocessor is configured to control the first motor-generator so as to reduce a reaction force acting on the first motor-generator at a time at which a state of the one-way clutch changes from an unlocked state to a locked state, when a drive mode is changed from an EV mode to a HV mode through a start mode by the mode change mechanism.
Claims8
A drive system of a hybrid vehicle, comprising:
- an internal combustion engine;
- a first motor-generator;
- a power transmission path including a first power transmission path and a second power transmission path connected with each other in series;
- a power division mechanism connected to the internal combustion engine to divide a power generated by the internal combustion engine to the first motor-generator and the first power transmission path;
- a second motor-generator connected to the second power transmission path;
- a one-way clutch interposed between an output shaft in the first power transmission path and an input shaft in the second power transmission path so that the output shaft and the input shaft integrally rotate in a locked state and the output shaft relatively rotates in relation to the input shaft in an unlocked state;
- a mode change mechanism provided in the first power transmission path to change a drive mode from an EV mode in which the hybrid vehicle is driven by a power of the second motor-generator with the internal combustion engine stopped to a HV mode in which the hybrid vehicle is driven by the power of the second motor-generator and the power generated by the internal combustion engine through a start mode in which the internal combustion engine is started;
- and
- an electronic control unit including a microprocessor and a memory and configured to perform controlling the internal combustion engine, the first motor-generator, the second motor-generator and the mode change mechanism, wherein
- the microprocessor is configured to perform
- the controlling including controlling the first motor-generator so as to reduce a reaction force acting on the first motor-generator, at a time at which a state of the one-way clutch changes from the unlocked state to the locked state, when the drive mode is changed from the start mode to the HV mode by the mode change mechanism.
8 more elements
A drive method of a hybrid vehicle, the hybrid vehicle including:
- an internal combustion engine;
- a first motor-generator;
- a power transmission path including a first power transmission path and a second power transmission path connected with each other in series;
- a power division mechanism connected to the internal combustion engine to divide a power generated by the internal combustion engine to the first motor-generator and the first power transmission path;
- a second motor-generator connected to the second power transmission path;
- a one-way clutch interposed between an output shaft in the first power transmission path and an input shaft in the second power transmission path so that the output shaft and the input shaft integrally rotate in a locked state and the output shaft relatively rotates in relation to the input shaft in an unlocked state;
- and a mode change mechanism provided in the first power transmission path to change a drive mode from an EV mode in which the hybrid vehicle is driven by a power of the second motor-generator with the internal combustion engine stopped to a HV mode in which the hybrid vehicle is driven by the power of the second motor-generator and the power generated by the internal combustion engine through a start mode in which the internal combustion engine is started,
- the drive method comprising controlling the internal combustion engine, the first motor-generator, the second motor-generator and the mode change mechanism, wherein
- the controlling includes controlling the first motor-generator so as to reduce a reaction force acting on the first motor-generator, at a time at which a state of the one-way clutch changes from the unlocked state to the locked state, when the drive mode is changed from the start mode to the HV mode by the mode change mechanism.
6 more elements
Dependencies are inferred from the claim text.