Controller for vehicle
First Claim
1. A control apparatus for a vehicle including a power transmitting system between an engine and wheels, said transmitting system having a continuously variable transmission (CVT) and a motor-generator actuated in one of a regenerating operation mode and an assisting operation mode, wherein said motor-generator serves as a generator in the regenerating operation mode and as a motor in the assisting operation mode, said apparatus comprising:
- determining means for determining a shift of engine speed;
computing means for computing a total moment of inertia of the engine, the CVT and the motor-generator, for computing the torque of the engine, the CVT and the motor-generator based on each of the computed inertia moments and a difference between the engine speeds of the current cycle and the previous cycle, and for computing the total amount of torque; and
correcting means for correcting the engine speed using at least one of said computed values, said correcting means selecting one of the operation modes of the motor-generator to actuate the motor-generator based on the determined shift of engine speed.
1 Assignment
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Accused Products
Abstract
A control apparatus for a vehicle includes a power transmitting system between an engine and wheels. The transmitting system has a continuously variable transmission (CVT) and a motor-generator actuated in one of a regenerating operation mode and an assisting operation mode. The motor-generator serves as a generator in a regenerating operation mode and as a motor in an assisting operation mode. The apparatus includes an electric control unit (ECU) that determines a shift of engine speed, computes the total amount of torque of the engine, the CVT and the motor-generator and selects one of the operation modes and actuates the motor-generator base on the selected operation mode to corrects the engine speed.
54 Citations
25 Claims
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1. A control apparatus for a vehicle including a power transmitting system between an engine and wheels, said transmitting system having a continuously variable transmission (CVT) and a motor-generator actuated in one of a regenerating operation mode and an assisting operation mode, wherein said motor-generator serves as a generator in the regenerating operation mode and as a motor in the assisting operation mode, said apparatus comprising:
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determining means for determining a shift of engine speed; computing means for computing a total moment of inertia of the engine, the CVT and the motor-generator, for computing the torque of the engine, the CVT and the motor-generator based on each of the computed inertia moments and a difference between the engine speeds of the current cycle and the previous cycle, and for computing the total amount of torque; and correcting means for correcting the engine speed using at least one of said computed values, said correcting means selecting one of the operation modes of the motor-generator to actuate the motor-generator based on the determined shift of engine speed. - View Dependent Claims (2, 3, 4, 5)
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6. A control apparatus for a vehicle including a power transmitting system between an engine and wheels, said transmitting system having a continuously variable transmission (CVT) and a motor-generator actuated in one of a regenerating operation mode and an assisting operation mode, wherein said motor-generator serves as a generator in the regenerating operation mode and as a motor in the assisting operation mode, said apparatus comprising:
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a power source for supplying an electric power to the motor-generator actuated in the assist operation mode and charged by the motor-generator actuated in the regenerating operation mode, wherein said motor-generator regenerates a maximum amount of voltage based on a currently residual voltage of the power source; computing means for computing a total amount of torque of the engine, the CVT and the motor-generator, and a maximum shiftable speed based on the total amount of the torques and the maximum amount of the voltage; adjusting means for adjusting a rotational speed of the CVT using at least one of the computed values; and control means for controlling the adjusting means based on the maximum electric power and a target rotational speed of the CVT. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A control apparatus for a vehicle including a power transmitting system between an engine and wheels, said transmitting system having a continuously variable transmission (CVT) and a motor-generator actuated in one of a regenerating operation mode and an assisting operation mode, wherein said motor-generator serves as a generator in the regenerating operation mode and as a motor in the assisting operation mode, wherein the motor-generated actuated in the regenerating operation mode charges a power source to induce torque required for reducing the engine speed, wherein a maximum chargeable voltage is determined based on a currently residual voltage in the power source, and wherein speed of the vehicle is manually shifted, said apparatus comprising:
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detecting means for detecting the manual shift operation for reducing a speed of the vehicle; computing means for computing a total moment of inertial of the engine, the CVT and the motor-generator, for computing the torque of the engine, the CVT and the motor-generator based on each of the computed inertia moments and a difference between the engine speeds of the current cycle and the previous cycle, and for computing the required torque based on the vehicle speed and an acceleration of the vehicle; comparing means for comparing the required torque and the maximum chargeable voltage; and control means for controlling the motor-generator, wherein said control means actuates the motor-generator in the regenerating operation mode based on the required torque being smaller than the maximum chargeable voltage, and wherein said control means controls to reduce the rotational speed of the CVT based on an excessive level of the required torque when the required torque is greater than the maximum chargeable voltage. - View Dependent Claims (14, 15, 16, 17)
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18. A control apparatus for a vehicle including a power transmitting system between an engine and wheels, said transmitting system having a continuously variable transmission (CVT) and a motor-generator actuated in one of a regenerating operation mode to reduce engine speed and an assisting operation mode to increase the engine speed, said apparatus comprising:
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recognizing means for recognizing a shift of the engine speed; computing means for computing a total moment of inertia of the engine, the CVT and the motor-generator, for computing the torque of the engine, the CVT and the motor-generator based on each of the computed inertia moments and a difference between the engine speeds of the current cycle and the previous cycle, and for computing the total amount of torque; actuating means for actuating the motor-generator in one of the operation modes in accordance with the recognized shift of the engine speed; and correcting means for correcting the engine speed using at least one of said computed values. - View Dependent Claims (19, 20, 21)
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22. A control apparatus for a vehicle including a power transmitting system between an engine and wheels, said transmitting system having a continuously variable transmission (CVT) and a motor-generator actuated in one of a regenerating operation mode to charge a power source and reduce the engine speed and an assisting operation mode to increase the engine speed, said apparatus comprising:
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hydraulic control means for controlling said CVT; detecting means for detecting a temperature of fluid in the hydraulic control means being smaller than a predetermined magnitude, wherein said predetermined magnitude is a minimum level for ensuring a start-up pressure of the fluid; determining means for determining an increase of the engine speed; computing means for computing torque required to reduce the engine speed in association with a delay of the start-up pressure of the fluid; and actuating means for actuating the motor-generator in the regenerating mode to charge the power source with voltage based on the required torque, wherein the CVT includes; an input shaft for receiving engine power; a pair of input plates relatively movable away from and toward each other on the input shaft; an output shaft; a pair of output plates relatively movable away from and toward each other on the output shaft; and a power transmitting belt for operably connecting the input plates and the output plates, wherein the rotational speed of the CVT is selectively increased and reduced based on the relative movement of the input plates toward and away from each other. - View Dependent Claims (23, 24)
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25. A continuously variable transmission for an engine driven vehicle, comprising:
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an input shaft for receiving engine power; a pair of input plates relatively movable away from and toward each other on the input shaft; an output shaft; a pair of output plates relatively movable away from and toward each other on the output shaft; and a power transmitting belt for operably connecting the input plates and the output plates, wherein the rotational speed of the CVT is selectively increased and reduced based on the relative movement of the input plates toward and away from each other.
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Specification