Control device for hybrid vehicle
First Claim
1. A control device for a hybrid vehicle, comprising:
- an engine driving drive wheels via an engine-power transmission path;
a drive motor driving said drive wheels via a motor-power transmission path;
a power generating motor provided to said engine-power transmission path and generating an electric power by said engine;
a coupling having an input-side shaft and an output-side shaft and provided to said engine-power transmission path and switched between a connection state of transmitting a power of said engine to said drive wheels and a disconnection state of cutting off the transmission of the power of said engine to said drive wheels;
a first revolution sensor for detecting a revolution speed of said power generating motor;
a second revolution sensor for detecting a revolution speed of said drive motor; and
a control unit,wherein, in the case where a power of said drive motor is transmitted to said drive wheels and said coupling is intended to switch from the disconnection state to the connection state,said control unit controls a revolution speed of said power generating motor based on a revolution speed of said drive motor,said control unit synchronizes said input-side shaft and said output-side shaft based on revolution speeds detected by said first and second revolution sensors,said control unit connects said coupling, andsaid control unit controls the power of said drive motor and the power of said engine in accordance with a required power of the vehicle after said coupling is connected.
1 Assignment
0 Petitions
Accused Products
Abstract
A hybrid vehicle is driven by one or both of an engine and a drive motor. The engine is started by a power generating motor, and power generated by the engine is supplied to a battery. An engine-power transmission path is provided with a coupling for being shifted to a connection state of transmitting engine power to drive wheels and a disconnection state of cutting off the transmission. In connecting the coupling while the drive motor is driven and transmitting engine torque, a revolution speed of the power generating motor is controlled based on that of the drive motor. After a revolution speed of an input-side shaft of the coupling is synchronized with that of an output-side shaft, the coupling is connected. After the coupling is connected, torque of the drive motor and engine is controlled based on required torque of the vehicle.
-
Citations
24 Claims
-
1. A control device for a hybrid vehicle, comprising:
-
an engine driving drive wheels via an engine-power transmission path; a drive motor driving said drive wheels via a motor-power transmission path; a power generating motor provided to said engine-power transmission path and generating an electric power by said engine; a coupling having an input-side shaft and an output-side shaft and provided to said engine-power transmission path and switched between a connection state of transmitting a power of said engine to said drive wheels and a disconnection state of cutting off the transmission of the power of said engine to said drive wheels; a first revolution sensor for detecting a revolution speed of said power generating motor; a second revolution sensor for detecting a revolution speed of said drive motor; and a control unit, wherein, in the case where a power of said drive motor is transmitted to said drive wheels and said coupling is intended to switch from the disconnection state to the connection state, said control unit controls a revolution speed of said power generating motor based on a revolution speed of said drive motor, said control unit synchronizes said input-side shaft and said output-side shaft based on revolution speeds detected by said first and second revolution sensors, said control unit connects said coupling, and said control unit controls the power of said drive motor and the power of said engine in accordance with a required power of the vehicle after said coupling is connected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A control device for a hybrid vehicle, comprising:
-
an engine driving drive wheels via an engine-power transmission path; a drive motor driving said drive wheels via a motor-power transmission path; a power generating motor provided to said engine-power transmission path and generating an electric power by said engine; a coupling having an input-side shaft and an output-side shaft and provided to said engine-power transmission path and switched between a connection state of transmitting a power of said engine to said drive wheels and a disconnection state of cutting off the transmission of the power of said engine to said drive wheels; a first revolution sensor for detecting a revolution speed of the power generating motor; a second revolution sensor for detecting a revolution speed of the drive motor; and a control unit, wherein, in the case where the power of said engine is transmitted to said drive wheels and said coupling is intended to switch from the connection state to the disconnection state, said control unit controls a power of said drive motor and the power of said engine in accordance with a required power of the vehicle, said control unit disconnects said coupling, and said control unit controls a revolution speed of said power generating motor in accordance with a revolution speed of said drive motor based on revolution speeds detected by said first and second sensors after said coupling is disconnected, so that revolution speeds of said input-side shaft and said output-side shaft differ from each other. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
-
17. A control device for a hybrid vehicle, comprising:
-
an engine driving drive wheels via an engine-power transmission path; a drive motor driving said drive wheels via a motor-power transmission path; a power generating motor provided to said engine-power transmission path and generating an electric power by said engine; a coupling having an input-side shaft and an output-side shaft and provided to said engine-power transmission path and switched between a connection state of transmitting a power of said engine to said drive wheels and a disconnection state of cutting off the transmission of the power of said engine to said drive wheels; a first revolution sensor for detecting a revolution speed of the power generating motor; a second revolution sensor for detecting a revolution speed of the drive motor; and a control unit for controlling said coupling, wherein, in the case where a power of said drive motor is transmitted to said drive wheels and said coupling is intended to switch from the disconnection state to the connection state, said control unit sets a target revolution speed based on the revolution speed of the drive motor detected by said second revolution sensor, and said control unit determines a completion of synchronization of said input-side shaft and said output-side shaft of said coupling by judging if a difference between said target revolution speed and the revolution speed of said power generating motor detected by said first revolution sensor is within a predetermined range for a predetermined time. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
Specification