Power transmission device
This patent describes a multistage gear shifting device for a motor vehicle in which first speed to fourth speed gear trains and reverse gear trains are arranged between two shafts in an order such that a low speed gear train comes first, one gear of each gear train being able to engage with and disengage from one of the two shafts through a hydraulic clutch, the gear shifting device including a manual valve which has operating positions corresponding to first speed to fourth speed and reverse and which is adapted to selectively operate hydraulic clutches for the respective gear trains, the one gear of the fourth speed gear train and one gear of the reverse gear train being integrally formed with each other and loosely fitting on one of two shafts and detachably engaged with one of the two shafts through a common hydraulic clutch, the other gears of the fourth speed and reverse gear trains being loosely fitting on the other shaft, the multistage gear shifting device including a selector for selectively engaging the other gears of the fourth speed and reverse gear trains, an actuator for actuating the selector in response to the action of the manual valve, and a switching valve annexed to the actuator, the switching valve guiding hydraulic oil from the manual valve to the common hydraulic clutch when the manual valve is brought to an operating position corresponding to fourth speed or reverse and discharging the hydraulic oil in the common hydraulic clutch to a drain through the manual valve.
- Assignee:
- Honda Giken Kogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4785682
- OSTI ID:
- 6483214
- Resource Relation:
- Patent File Date: Filed date 20 May 1987
- Country of Publication:
- United States
- Language:
- English
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