Control apparatus for regulating engagement of a fluid operated

Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position

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192109F, B60K 4106

Patent

active

051196972

ABSTRACT:
An electronically mechanized control method for regulating the engagement rate or stroke time of a fluid operated torque transmitting device, wherein the flow rate is controlled with a flow control device having a low flow state and a high flow state. The shift is initiated with the flow control device in the high flow state. After a variable delay time, the flow control valve is activated to the low flow state to complete the shift. The delay time is scheduled as an open-loop function of various system parameters to achieve the optimum amount of overlap between the on-coming and off-going torque transmitting devices. An adaptive learning control superimposed on the open-loop control trims the open-loop schedule to compensate for changes in system parameters or tolerance variations which affect the stroke time.

REFERENCES:
patent: 4501173 (1985-02-01), Honig
patent: 4665776 (1987-05-01), Sugano
patent: 4688451 (1987-08-01), Sakai et al.
patent: 4722251 (1988-02-01), Sumiya et al.
patent: 4930080 (1990-05-01), Suzuki
patent: 5035312 (1991-07-01), Asayama et al.
THM 700-R4 "Principles of Operation" (2nd. Ed.) by Hydra-Matic of GMC.
Isuzu Technician Guide, "Principles of Operation and Diagnosis", Automatic Transmission 4L30-E.

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