Engine starting control device for a hybrid vehicle
First Claim
Patent Images
1. A drive device for a hybrid vehicle, comprising:
- an engine and a motor/generator;
a first clutch disposed between the engine and the motor/generator that has an ability to change a transfer torque capacity therebetween;
a second clutch disposed between the motor/generator and a drive wheel that has an ability to change a transfer torque capacity therebetween; and
a control device that has the ability to control the engine, the motor/generator, the first clutch and the second clutch; and
wherein the control device has the ability to select an electric operation mode releasing the first clutch while engaging the second clutch, or a hybrid operation mode engaging both the first clutch and the second clutch;
is equipped with a first clutch engagement control means for starting the engine by engagement progression of the first clutch when changing modes during operation from electric operation mode to hybrid operation mode;
is equipped with a second clutch engagement control means that causes a slip engagement of the second clutch during starting the engine; and
is equipped with a motor/generator control means for controlling the motor/generator so that the motor/generator operates so as to maintain the slip engagement when the second clutch slip engages.
1 Assignment
0 Petitions
Accused Products
Abstract
An engine of a hybrid vehicle is lift started by reducing a rotational speed of a motor/generator of the hybrid vehicle by adjusting a gearshift ratio of a transmission coupled to the motor/generator, and engaging a clutch to couple the engine, while in a stopped state, to the rotating motor/generator for imparting the rotation to the engine.
-
Citations
50 Claims
-
1. A drive device for a hybrid vehicle, comprising:
-
an engine and a motor/generator;
a first clutch disposed between the engine and the motor/generator that has an ability to change a transfer torque capacity therebetween;
a second clutch disposed between the motor/generator and a drive wheel that has an ability to change a transfer torque capacity therebetween; and
a control device that has the ability to control the engine, the motor/generator, the first clutch and the second clutch; and
wherein the control device has the ability to select an electric operation mode releasing the first clutch while engaging the second clutch, or a hybrid operation mode engaging both the first clutch and the second clutch;
is equipped with a first clutch engagement control means for starting the engine by engagement progression of the first clutch when changing modes during operation from electric operation mode to hybrid operation mode;
is equipped with a second clutch engagement control means that causes a slip engagement of the second clutch during starting the engine; and
is equipped with a motor/generator control means for controlling the motor/generator so that the motor/generator operates so as to maintain the slip engagement when the second clutch slip engages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A drive device for a hybrid vehicle, comprising:
-
an engine and a motor/generator;
a first clutch disposed between the engine and the motor/generator that has an ability to change a transfer torque capacity therebetween;
a second clutch disposed between the motor/generator and a drive wheel that has an ability to change a transfer torque capacity therebetween; and
a control device that has an ability to control the engine, the motor/generator, the first clutch and the second clutch; and
wherein the control device has the ability to select an electric operation mode by releasing the first clutch while engaging the second clutch, or a hybrid operation mode by engaging both the first clutch and the second clutch;
is equipped with a first clutch engagement controller for starting the engine by engagement progression of the first clutch when changing modes during operation from electric operation mode to hybrid operation mode;
is equipped with a second clutch engagement controller that causes a slip engagement of the second clutch; and
is equipped with a motor/generator controller for controlling the motor/generator so that the motor/generator operates so as to maintain a slip engagement when the second clutch slip engages in accordance with this means. - View Dependent Claims (25, 26, 27, 28)
-
-
29. A method for switching operation modes of a drive device for a hybrid vehicle, comprising:
-
selecting an electric operation mode by releasing a first clutch disposed between an engine and a motor/generator while engaging a second clutch disposed between the motor/generator and a drive wheel, or a hybrid operation mode by engaging both the first clutch and the second clutch;
starting the engine by engagement progression of the first clutch when changing modes during operation from the electric operation mode to the hybrid operation mode;
causing a slip engagement of the second clutch to prevent the transfer torque fluctuation of the first clutch that accompanies the starting of the engine from being transferred to the drive wheel; and
controlling the motor/generator so that the motor/generator operates so as to maintain the slip engagement when the second clutch slip engages. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
-
Specification