Hybrid vehicle
First Claim
1. A hybrid vehicle comprising:
- a first generator-motor connected to an output shaft of an engine that generates a driving force of the vehicle and also connected to either one of a pair of front wheels and a pair of rear wheels of the vehicle through the intermediary of a transmission so as to be capable of imparting torque to one of the pairs of wheels through the intermediary of the transmission;
a second generator-motor connected to the other pair of wheels of the vehicle through the intermediary of a rotation transmitting means that has a higher torque transmission efficiency than at least the transmission so as to be capable of imparting torque to the other pair of wheels through the intermediary of the rotation transmitting means;
target deceleration force setting means for setting a target deceleration force of the vehicle when the vehicle decelerates;
second permissible maximum braking torque setting means for setting a second permissible maximum braking torque as a permissible maximum value of braking torque to be applied to the other pair of wheels from the second generator-motor;
a target braking torque determining means for determining a target decelerating torque of the vehicle that corresponds to the target deceleration force or the second permissible maximum braking torque, whichever is smaller, as a target braking torque to be imparted to the other pair of wheels from the second generator-motor, and for determining the target braking torque by taking a remaining torque, which is obtained by subtracting a target braking torque related to the second generator-motor from the target deceleration torque, as an upper limit of a target braking torque to be imparted to the one pair of wheels from the first generator-motor; and
control means for making the generator-motors perform regenerative operations such that the determined target braking torques are imparted to corresponding wheels from the respective generator-motors.
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Accused Products
Abstract
A hybrid vehicle is capable of performing regenerative operations of generator-motors disposed adjacently to front wheels and/or rear wheels of the vehicle so as to achieve efficient conversion of kinetic energy of the vehicle into electric energy as much as possible when the vehicle slows down, thereby permitting higher use efficiency of energy. When the vehicle decelerates, a target deceleration force or a target deceleration torque of the vehicle is set, and a permissible maximum value of the braking torque to be imparted to rear wheels from a second generator-motor is set, and the permissible maximum value and the target deceleration torque of the vehicle, whichever is smaller, is set as a target braking torque to be imparted from the second generator-motor to the rear wheels. Furthermore, with the remaining torque of the target deceleration torque being set as an upper limit, a target braking torque to be imparted to front wheels from a first generator-motor is determined, and a friction type braking mechanism compensates a shortfall torque of a total sum of the target braking torques of the two generator-motors to reach the target deceleration torque.
118 Citations
12 Claims
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1. A hybrid vehicle comprising:
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a first generator-motor connected to an output shaft of an engine that generates a driving force of the vehicle and also connected to either one of a pair of front wheels and a pair of rear wheels of the vehicle through the intermediary of a transmission so as to be capable of imparting torque to one of the pairs of wheels through the intermediary of the transmission;
a second generator-motor connected to the other pair of wheels of the vehicle through the intermediary of a rotation transmitting means that has a higher torque transmission efficiency than at least the transmission so as to be capable of imparting torque to the other pair of wheels through the intermediary of the rotation transmitting means;
target deceleration force setting means for setting a target deceleration force of the vehicle when the vehicle decelerates;
second permissible maximum braking torque setting means for setting a second permissible maximum braking torque as a permissible maximum value of braking torque to be applied to the other pair of wheels from the second generator-motor;
a target braking torque determining means for determining a target decelerating torque of the vehicle that corresponds to the target deceleration force or the second permissible maximum braking torque, whichever is smaller, as a target braking torque to be imparted to the other pair of wheels from the second generator-motor, and for determining the target braking torque by taking a remaining torque, which is obtained by subtracting a target braking torque related to the second generator-motor from the target deceleration torque, as an upper limit of a target braking torque to be imparted to the one pair of wheels from the first generator-motor; and
control means for making the generator-motors perform regenerative operations such that the determined target braking torques are imparted to corresponding wheels from the respective generator-motors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification