Method and apparatus for controller power train of motor vehicle
First Claim
1. An apparatus for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising:
- a road condition detector for detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient;
a road surface condition detector for detecting a road surface condition;
a calculating unit for calculating a friction coefficient based on detected road surface condition, and for calculating a targeted vehicle speed of said motor vehicle based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, a road gradient, and on said friction coefficient; and
an actuator for controlling at least one of said engine, said automatic transmission, and said braking system such that a vehicle speed of said motor vehicle approaches said calculated targeted vehicle speed.
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Abstract
The vehicle power train control method and apparatus according to the invention secures both operability and safety by controlling an actual acceleration/deceleration to a target acceleration/deceleration requested by a driver under safe traveling condition, and changing the target acceleration/deceleration so as to take precedence for safe traveling if the driver encounters a dangerous traveling condition. According to the invention, acceleration/deceleration and speed of a motor vehicle are detected; a target acceleration/deceleration is determined; and a road condition such as a road gradient or presence or absence of a forward motor vehicle is detected to decide whether the road condition is dangerous. The target acceleration is changed if the condition is decided to be dangerous.
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Citations
9 Claims
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1. An apparatus for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising:
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a road condition detector for detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; a road surface condition detector for detecting a road surface condition; a calculating unit for calculating a friction coefficient based on detected road surface condition, and for calculating a targeted vehicle speed of said motor vehicle based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, a road gradient, and on said friction coefficient; and an actuator for controlling at least one of said engine, said automatic transmission, and said braking system such that a vehicle speed of said motor vehicle approaches said calculated targeted vehicle speed.
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2. An apparatus for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising:
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a road condition detector for detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; a seat belt engagement state detector for detecting a seat belt engagement state; a calculating unit for calculating a targeted vehicle speed of said motor vehicle, based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient, and on said seat belt engagement state; and an actuator for controlling at least one of said engine, said automatic transmission, and said braking system such that a vehicle speed of said motor vehicle approaches said calculated targeted vehicle speed.
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3. An apparatus for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising:
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a road condition detector for detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; a memory for storing data defining a center of gravity of said motor vehicle; a calculating unit for calculating a targeted vehicle speed of said motor vehicle, based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient, and on said data stored in said memory; and an actuator for controlling at least one of said engine, said automatic transmission, and said braking system such that a vehicle speed of said motor vehicle approaches said calculated targeted vehicle speed.
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4. An apparatus for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising:
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a road condition detector for detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; a road surface condition detector for detecting a road surface condition; a calculating unit for calculating a friction coefficient based on detected road surface condition, and for calculating a targeted torque of an output shaft of said automatic transmission based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient, and on said friction coefficient; and an actuator for controlling at least one of said engine, said automatic transmission, and said braking system such that a torque of said output shaft of said automatic transmission approaches said calculated targeted torque.
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5. An apparatus for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising:
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a road condition detector for detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; a seat belt engagement state detector for detecting a seat belt engagement state; a calculating unit for calculating a targeted torque of an output shaft of said automatic transmission based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient, and on said seat belt engagement state; and an actuator for controlling at least one of said engine, said automatic transmission, and said braking system such that a torque of said output shaft of said automatic transmission approaches said calculated targeted torque.
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6. An apparatus for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising:
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a road condition detector for detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; a memory for storing data defining a center of gravity of said motor vehicle; a calculating unit for calculating a targeted torque of an output shaft of said automatic transmission of said motor vehicle based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient, and on said data stored in said memory; and an actuator for controlling at least one of said engine, said automatic transmission, and said braking system such that a torque of said output shaft of said automatic transmission approaches said calculated targeted torque.
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7. A method for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising the steps of:
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detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; detecting a road surface condition; calculating a friction coefficient based on detected road surface condition, and for calculating at least one of a targeted vehicle speed of said motor vehicle and a targeted torque of an output shaft of said automatic transmission based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient, and on said friction coefficient; and controlling at least one of said engine, said automatic transmission, and said braking system such that a vehicle speed of said motor vehicle approaches said targeted vehicle speed or a torque of said output shaft of said automatic transmission approaches said calculated targeted torque.
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8. A method for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising the steps of:
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detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; detecting a seat belt engagement state; calculating at least one of a targeted vehicle speed of said motor vehicle and a targeted torque of an output shaft of said automatic transmission based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient, and on said seat belt engagement state; and controlling at least one of said engine, said automatic transmission, and said braking system such that a vehicle speed of said motor vehicle approaches said targeted vehicle speed, or a torque of said output shaft of said automatic transmission approaches said calculated targeted torque.
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9. A method for controlling a power train of a motor vehicle having an engine, an automatic transmission, and a braking system, comprising the steps of:
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detecting at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient; storing data defining a center of gravity of said motor vehicle in a memory; calculating at least one of a targeted vehicle speed of said motor vehicle and a targeted torque of an output shaft of said automatic transmission of said motor vehicle based on said at least one of an obstacle in front of said motor vehicle, a road curvature radius, and a road gradient, and on said data stored in said memory; and controlling at least one of said engine, said automatic transmission, and said braking system such that a vehicle speed of said motor vehicle approaches said targeted vehicle speed or a torque of said output shaft of said automatic transmission approaches said calculated targeted torque.
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Specification