HYBRID VEHICLE AND METHOD FOR CONTROLLING THE SAME
First Claim
1. A hybrid vehicle comprising:
- an internal combustion engine;
a first electric motor configured to have a power transmission path between the first electric motor and an output shaft of said internal combustion engine, for outputting a motoring torque when said internal combustion engine is started;
a second electric motor configured to have a power transmission path between the second electric motor and the output shaft of said internal combustion engine;
a vibration reduction torque calculation unit for setting, when said internal combustion engine is started, a periodic vibration reduction torque for suppressing torque pulsation occurring as said internal combustion engine rotates, based on a rotational position of the output shaft of said internal combustion engine; and
a torque control unit for controlling output torques of said first and second electric motors so that, when said internal combustion engine is started, a partial torque of said vibration reduction torque is output from said first electric motor and a shortage of said vibration reduction torque due to said partial torque is compensated for by the output torque from said second electric motor.
1 Assignment
0 Petitions
Accused Products
Abstract
A crankshaft of an engine, an output shaft of a first electric motor, and an output shaft of a second electric motor are directly or indirectly connected to each other mechanically. When the engine is started, a vibration reduction torque is caused to act on the crankshaft that is set in the form of a periodic torque based on the crank angle, so that torque pulsation of the engine is suppressed. The output torque of the first electric motor is controlled in accordance with the sum of a motoring torque and a part of the vibration reduction torque. The output torque of the second electric motor is controlled in accordance with the sum of its essential output torque for causing the vehicle to travel and a torque for compensating for a shortage of the vibration reduction torque that occurs because a part of the vibration reduction torque is output from the first electric motor.
-
Citations
17 Claims
-
1. A hybrid vehicle comprising:
-
an internal combustion engine; a first electric motor configured to have a power transmission path between the first electric motor and an output shaft of said internal combustion engine, for outputting a motoring torque when said internal combustion engine is started; a second electric motor configured to have a power transmission path between the second electric motor and the output shaft of said internal combustion engine; a vibration reduction torque calculation unit for setting, when said internal combustion engine is started, a periodic vibration reduction torque for suppressing torque pulsation occurring as said internal combustion engine rotates, based on a rotational position of the output shaft of said internal combustion engine; and a torque control unit for controlling output torques of said first and second electric motors so that, when said internal combustion engine is started, a partial torque of said vibration reduction torque is output from said first electric motor and a shortage of said vibration reduction torque due to said partial torque is compensated for by the output torque from said second electric motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for controlling a hybrid vehicle including:
- an internal combustion engine;
a first electric motor configured to have a power transmission path between the first electric motor and an output shaft of said internal combustion engine, for outputting a motoring torque (Tm) when said internal combustion engine is started; and
a second electric motor configured to have a power transmission path between the second electric motor and the output shaft of said internal combustion engine,said method comprising the steps of; setting, when said internal combustion engine is started, a periodic vibration reduction torque for suppressing torque pulsation occurring as said internal combustion engine rotates, based on a rotational position of the output shaft of said internal combustion engine; and controlling output torques of said first and second electric motors so that, when said internal combustion engine is started, a partial torque of said vibration reduction torque is output from said first electric motor and a shortage of said vibration reduction torque due to said partial torque is compensated for by the output torque from said second electric motor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
- an internal combustion engine;
Specification