Terry R Toops

US Patent:

53822021, Jan 17, 1995

Filed:

Mar 12, 1993

Appl. No.:

8/030839

Inventors:

Jeffrey A. Solove - Blacklick OH
Thomas D. Buchanan - Newark OH
Richard L. Irvin - Columbus OH
Terry R. Toops - Columbus OH

Assignee:

Barney & White Auto Parts, Inc. - Columbus OH

International Classification:

F16H 546

US Classification:

475124

Abstract:

An control system and method for an automatic transmission are disclosed which are adapted to shift or actuate the gears of the transmission without engine vacuum assistance. A control valve is provided which is variably positionable in response to a pressure signal from a governor to select control positions controlling the flow of hydraulic fluid to the gear shift elements of the transmission. The control valve is biased at a first select control position and is movable in response to the pressure signal from the governor to a second select control position for providing hydraulic fluid to the gear shift elements at a pressure effective for actuating the elements at a preselect vehicle speed. An adjustable position delimiter maintains the control valve at the second preselect control position.