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:
Jun. 23, 2020
Filed:
Sep. 19, 2014
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Yuji Noto, Isesaki, JP;
Hideki Sekiguchi, Isesaki, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
The present invention relates to a range switching device for performing range switching of an automatic transmission by using an actuator that is electrically controlled to be driven, and to a switching method thereof. A range switching device of an automatic transmission that can reduce collision noise occurring from a detent mechanism and a switching method thereof are provided. The automatic transmission includes a detent mechanism that presses a roller against a groove by using a spring, moves the roller between grooves, and determines a range position of the transmission, and a range of the transmission is changed by driving the detent mechanism by the actuator. In changing a range position of the transmission, the actuator is braked in accordance with a drawing force of the spring into a groove so that energy of the velocity when the roller reaches a target stop position can be controlled to approach zero.