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. 10, 1987
Filed:
Oct. 30, 1986
Toshitaka Suketomo, Kawasaki, JP;
Kenjiro Nezuka, Sayama, JP;
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
Abstract
A control apparatus for a power transmission of vehicles such as construction machine having at least one work implement actuated by a hydraulic cylinder unit, a transmission gear with hydraulically operated speed-change clutch, and a torque converter interposed between an engine and the transmission gear so as to transmit rotational power of the engine and having a hydraulically operated stator clutch. The control apparatus has two solenoid actuated clutch pressure control valves respectively provided in two hydraulic circuits which connect a hydraulic fluid supply source with the speed-change clutch and the stator clutch, respectively, so as to change the hydraulic pressure in the hydraulic circuits by the operation of a controller to which respective solenoids of the clutch pressure control valves are connected on its output part and an engine rotation sensor, a pressure sensor for detecting the pressure in the hydraulic cylinder unit of the work implement and a speed-change lever position sensor for detecting the shift of the lever to its first speed position are connected on its input part.