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:
Feb. 25, 2020
Filed:
Nov. 04, 2015
Guangzhou Automobile Group Co., Ltd., Guangzhou, Guangdong Province, CN;
Jian Wu, Guangzhou, CN;
Fan Mo, Guangzhou, CN;
Xinzhi Huang, Guangzhou, CN;
Xuewu Liu, Guangzhou, CN;
Anwei Zhang, Guangzhou, CN;
GUANGZHOU AUTOMOBILE GROUP CO., LTD., Guangzhou, Guangdong Province, CN;
Abstract
A gear-shifting control system of an automatic transmission includes a main pump, four gear-shifting cylinders, a gear-shifting control valve, a first gear switching valve, a second gear switching valve, a first gear on-off valve, and a second gear on-off valve. The gear-shifting control valve has an inlet and two outlets, the first gear switching valve has two inlets and four outlets, the second gear switching valve has two inlets and four outlets. The first gear on-off valve is connected between the first gear switching valve and the gear-shifting control valve, to disconnect or connect the gear-shifting control valve and the first gear switching valve. The second gear on-off valve is connected between the second gear switching valve and the gear-shifting control valve, to disconnect or connect the gear-shifting control valve and the second gear switching valve. The four outlets of the first gear switching valve and the four outlets of the second gear switching valve are connected with the four gear-shifting cylinders.