The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 1990
Filed:
Mar. 01, 1989
Ralph C Bolz, Livonia, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A throttle valve system for an automatic transmission control circuit comprising a solenoid pilot valve and a pressure regulating throttle pressure spool valve for developing a throttle valve pressure for use in initiating control functions in a multiple ratio transmission wherein the output signal of the throttle valve can be used as an indicator of the driving torque wherein the force requirements of the variable force solenoid are reduced and wherein the sensitivity of the pressure regulating throttle valve to the output signal of the pilot valve and to changes in engine torque is improved relative to prior art throttle valve systems, the pilot valve being effective to control a larger flow insensitive regulating valve and the stroke of the solenoid actuator for the pilot valve being minimal.