System for controlling rate of speed change in automatic transmission
A control system is described for an automatic transmission employed in a vehicle comprising: a torque converter coupled with an engine shaft of an engine, a power transmitting gear arrangement disposed at an output end of the torque converter for producing a plurality of speeds, speed change means for changing over power transmitting paths to one from another in the power transmitting gear arrangement to give rise to speed change, fluid servo control means having an applying chamber and a releasing chamber to each of which a fluid is supplied and operative selectively to cause the speed change means to be in a disengaging state, regardless of a condition of the fluid in the applying chamber, when the fluid is supplied to the releasing chamber,first additional control means for causing the releasing chamber of the fluid servo control means to be selectively in a first condition wherein the fluid is supplied to the releasing chamber and in a second condition wherein the fluid is drained from the releasing chamber.
- Assignee:
- Mazda Motor Corp., Hiroshima
- Patent Number(s):
- US 4831900
- OSTI ID:
- 5836818
- Country of Publication:
- United States
- Language:
- English
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