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:
Nov. 06, 1984
Filed:
May. 12, 1981
Tomio Oguma, Anjo, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
The transmission ratio of an infinitely variable transmission for automotive vehicles is controlled by a system including a hydraulic servo. The servo mechanism including an actuator which is driven by a line pressure to actuate the transmission and a spool having one end to which a signal pressure responsive to both throttle opening responsive pressure and vehicle speed responsive pressure is applied counteractingly against a spring. The spool provides a control valve function for the driving fluid pressure to the actuator. In response to signal pressure change to the spool the actuator is actuated in such direction that the transmission ratio is decreased or increased. The signal pressure is produced by a compensation valve due to a throttle opening responsive pressure and vehicle speed responsive pressure, e.g. governor pressure.