Power switchover apparatus for a hybrid vehicle
First Claim
1. A power switchover apparatus for a hybrid vehicle, the hybrid vehicle including a starting clutch provided between a crankshaft of an engine and an automatic transmission, a one-way clutch interposed between the automatic transmission and a drive shaft, and a drive motor connected to the drive shaft, wherein, upon starting, the one-way clutch is controlled to idle using the motor as a power source, and thereafter, the one-way clutch is connected to switch over the power source to the engine, said power switchover apparatus for a hybrid vehicle comprising:
- target rotational speed setting means for setting a target rotational speed of the engine when the power source is to be switched over from the motor to the engine; and
control means for controlling the engine rotational speed and the transmission ratio of the automatic transmission in response to the target rotational speed, said control means including;
means for controlling the engine rotational speed to follow up the target rotational speed; and
means for controlling the transmission ratio of the automatic transmission to rise until the power of the engine is transmitted to the drive shaft while the engine rotational speed remains following up the target rotational speed.
1 Assignment
0 Petitions
Accused Products
Abstract
To provide a power switchover apparatus for a hybrid vehicle, which can perform power switchover smoothly. Target follow-up control is started, and when the engine speed reaches a clutch-in speed of a starter clutch, the input power shaft of a continuously variable transmission starts rotation. The speed of the output power shaft also begins to gradually rise in response to the starting of rotation. The engine speed then reaches a target, and transmission ratio raising control of raising the transmission ratio based on the difference between the motor speed of a drive shaft and the speed of a driven side pulley is started. The motor speed Nm of the drive motor and the speed of the driven side power transmission pulley then become equal to each other and the one-way clutch is placed into a connected state. Consequently, the transmission ratio raising control is stopped and normal control is entered.
-
Citations
20 Claims
-
1. A power switchover apparatus for a hybrid vehicle, the hybrid vehicle including a starting clutch provided between a crankshaft of an engine and an automatic transmission, a one-way clutch interposed between the automatic transmission and a drive shaft, and a drive motor connected to the drive shaft, wherein, upon starting, the one-way clutch is controlled to idle using the motor as a power source, and thereafter, the one-way clutch is connected to switch over the power source to the engine, said power switchover apparatus for a hybrid vehicle comprising:
-
target rotational speed setting means for setting a target rotational speed of the engine when the power source is to be switched over from the motor to the engine; and control means for controlling the engine rotational speed and the transmission ratio of the automatic transmission in response to the target rotational speed, said control means including; means for controlling the engine rotational speed to follow up the target rotational speed; and means for controlling the transmission ratio of the automatic transmission to rise until the power of the engine is transmitted to the drive shaft while the engine rotational speed remains following up the target rotational speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A power switchover apparatus for a hybrid vehicle, comprising:
-
a target rotational speed setting device, said target rotational speed setting device setting a target rotational speed of an engine when a power source of the hybrid vehicle is to be switched over from a motor to the engine; and a control, said control controlling a rotational speed of the engine and a transmission ratio of an automatic transmission in response to the target rotational speed, controlling the engine rotational speed to follow up the target rotational speed and controlling the transmission ratio of the automatic transmission to rise until the power of the engine is transmitted to a drive shaft while the engine rotational speed remains following up the target rotational speed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification