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US 6,659,569 B2Granted
Vehicle braking control method and apparatus
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTsukasa Fukasawa
Life of this patent
Estimating the term…
Abstract
A method and apparatus control target deceleration of a vehicle in response to a master cylinder pressure and the like. A controlled braking mode in which the pressure in each wheel cylinder is controlled based on the target deceleration, and a driver braking mode in which the pressure in each wheel cylinder is directly controlled by a master cylinder. When an abnormality in the braking control is detected, the ratio of the wheel braking force to the amount of driver's braking operation is gradually adjusted closer to the ratio set for the driver braking mode.
Claims19
A braking control apparatus of a vehicle, comprising:
- a controller that controls a valve provided for each wheel, in a controlled braking mode in which a target amount of braking control is calculated based on an amount of braking operation performed by a driver on a braking member such that the valve is controlled based on the target amount of braking control, and in a driver braking mode in which a braking force is generated by transferring an operating force exerted on the braking member by the driver to the valve;
- and
- wherein the controller:
- predicts an abnormal state in which continuation of a control of the braking force in the controlled braking mode is impossible;
- switches from the controlled braking mode to the driver braking mode if the abnormal state is predicted;
- and
- adjusts a ratio of the braking force generated by the valve to the amount of braking operation of the driver, which the ratio is adjusted closer to a predetermined ratio set for the driver braking mode before the controlled braking mode is switched to the driver braking mode.
4 more elements
A braking control apparatus of a vehicle, comprising:
- a controller that controls valves provided for each wheel, in a controlled braking mode in which a target amount of braking control is calculated based on an amount of braking operation performed by a driver on a braking member such that the valves are controlled based on the target amount of braking control, and in a driver braking mode in which a braking force is generated by transferring an operating force exerted on the braking member by the driver to the valves;
- and
- wherein the controller:
- predicts an abnormal state;
- and
- switches from the controlled braking mode to the driver braking mode if the abnormal state occurs in which continuation of a control of the braking force in the controlled braking mode is impossible, wherein the controller adjusts a ratio of the braking force generated by the valves to the amount of braking operation of the driver, which the ratio is adjusted closer to a ratio set for the driver braking mode if the abnormal state is predicted during the braking control mode.
3 more elements
A method for braking a vehicle, comprising:
- controlling valves provided for each wheel, in a controlled braking mode in which a target amount of braking control is calculated based on an amount of braking operation performed by a driver on a braking member such that the valve is controlled based on the target amount of braking control, and in a driver braking mode in which a braking force is generated by transferring an operating force exerted on the braking member by the driver to the valve;
- predicting an abnormal state in which continuation of a control of the braking force in the controlled braking mode is impossible;
- switching from the controlled braking mode to the driver braking mode if the abnormal state is predicted;
- and
- adjusting a ratio of the braking force generated by the braking force to the amount of braking operation of the driver, which the ratio is adjusted closer to a predetermined ratio set for the driver braking mode before the controlled braking mode is switched to the driver braking mode.
2 more elements
A method for braking a vehicle, comprising:
- controlling valves provided for each wheel, in a controlled braking mode in which a target amount of braking control is calculated based on an amount of braking operation performed by a driver on a braking member such that the valves are controlled based on the target amount of braking control, and in a driver braking mode in which a braking force is generated by transferring an operating force exerted on the braking member by the driver to the valves;
- predicting an abnormal state;
- and
- switching from the controlled braking mode to the driver braking mode if the abnormal state occurs in which continuation of a control of the braking force in the controlled braking mode is impossible,
- adjusting a ratio of the braking force generated by the valves to the amount of braking operation of the driver, which the ratio is adjusted closer to a ratio set for the driver braking mode if the abnormal state is predicted during the braking control mode.
2 more elements
Dependencies are inferred from the claim text.