192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1985-11-15
1988-03-22
Bonck, Rodney H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 0073, 192 0076, 192 008, 192 4B, 74336R, 74858, 74866, 74872, B60K 4128, B60K 4102, B60K 4108
Patent
active
047322462
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an automatic transmission apparatus which performs switching control of a gear position of a transmission, in addition to engagement/disengagement control of a clutch, in accordance with a vehicle speed.
BACKGROUND ART
Conventionally, a gear shift unit for finger touch control is known wherein a driver manually operates a gear shift lever. A transmission signal obtained therefrom is processed by a control box so as to supply a predetermined operation signal to the gear shift unit, and the unit switches a transmission using a booster driven by a pneumatic pressure. A gear shift unit of this type is disclosed in specifications and drawings of Japanese Utility Model Application Nos. 57-144735 and 57-138832. Such an apparatus can reduce fatigue of the driver since force to operate the transmission can be decreased. However, the clutch must be engaged/disengaged by the driver in the case of a transmission switching operation.
DISCLOSURE OF INVENTION
The present invention has been made in consideration of the above situation, and has, as its object, to provide an automatic transmission apparatus which needs no clutch engagement/disengagement operation by a driver, and can automatically drive a clutch and a transmission.
According to the present invention, there is provided an automatic transmission apparatus for a vehicle, characterized by comprising a parallel shaft type gear automatic transmission connected through a clutch to an engine mounted on a vehicle, an actuator for engaging/diseengaging the clutch, actuator control means for controlling an operation of the actuator, clutch position detecting means for detecting engagement/disengagement of the clutch, transmission position detecting means for generating a signal corresponding to a transmission position of the parallel shaft type gear automatic transmission, transmission position switching means for changing the meshing state of the parallel shaft type gear automatic transmission, operating condition detecting means for detecting operating conditions of at least one of the vehicle, the engine or the parallel shaft type gear automatic transmission, transmission position selecting means for supplying a transmission signal to the transmission position switching means so as to shift the parallel shaft type gear automatic transmission to a target transmission position in accordance with an operation by a driver, and automatic transmission control means comprising at least load detecting means for detecting a load state of the engine, first clutch control means for operating the actuator control means so as to actuate the clutch from a disengaged state to a half engaged state in accordance with an accelerator position signal from the operating condition detecting means, second clutch control means for operating the actuator control means so as to gradually engage the clutch when a load signal from the load detecting means is below a preset value after operation of the first clutch control means, and to disengage the clutch so as to reduce the load of the engine when the preset value is exceeded, and third clutch control means for operating the actuator control means so as to fully engage the clutch when the difference between an engine speed and an output shaft speed of the clutch, detected by the operating condition detecting means, becomes lower than a predetermined value after operation of the second clutch control means.
Furthermore, according to the present invention, there is provided an automatic transmission apparatus for a vehicle, characterized by comprising a parallel shaft type gear automatic transmission connected through a clutch to an engine mounted on a vehicle, an actuator for engaging/disengaging the clutch, actuator control means for controlling an operation of the actuator, clutch position detecting means for detecting engagement/disengagement of the clutch, transmission position detecting means for generating a signal corresponding to a transmission position of the parallel shaft typ
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Fukushima Shigeki
Ihara Osamu
Iwamoto Tomoyuki
Tateno Toshiaki
Bonck Rodney H.
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
Testardi David A.
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