Method of controlling automatic clutch for motor vehicles
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYoshinori Yamamoto, Yoshikazu Ishikawa
Life of this patent
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Abstract
A vehicle speed is determined from a detected signal, e.g., pulses produced by a rotation sensor for detecting rotation of the output shaft of a transmission, which signal corresponds to rotation of road wheels. Then, the deceleration of the vehicle speed is calculated from the detected vehicle speed, and then a rate of change of the deceleration is calculated from the calculated deceleration. If the rate of change of the deceleration is larger than a predetermined value, thereby indicating a panic braking condition of the vehicle, an automatic clutch incorporated in the transmission is disengaged to prevent stalling of the vehicle engine.
Claims10
A method of controlling an automatic clutch in a motor vehicle having an engine, road wheels, a transmission, and said automatic clutch for controlling transmitting power of the engine to the road wheels, said method comprising the steps of:
- detecting a vehicle speed from a signal representative of rotation of the road wheels;
- calculating a first value corresponding to a deceleration of the vehicle speed from the detected vehicle speed;
- calculating a second value corresponding to a rate of change of said deceleration from the calculated first value;
- and
- disengaging the automatic clutch to reduce the transmitting power to zero if said second value is larger than a predetermined value.
A method of controlling an automatic clutch in a motor vehicle having an engine, road wheels, a transmission, and said automatic clutch for controlling transmitting power of the engine to the road wheels, said method comprising the steps of:
- detecting a vehicle speed from a signal representative of rotation of the engine and a speed reduction ratio of the transmission;
- calculating a first value corresponding to a deceleration of the vehicle speed from the detected vehicle speed;
- calculating a second value corresponding to a rate of change of said deceleration from the calculated first value;
- and
- disengaging the automatic clutch to reduce the transmitting power to zero if said second value is larger than a predetermined value.
Dependencies are inferred from the claim text.