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. 17, 1998
Filed:
Jun. 05, 1997
Shinya Sakaguchi, Kariya, JP;
Akira Takagi, Obu, JP;
Denso Corporation, Kariya, JP;
Abstract
Hydraulic pressure applied to an LR/B is controlled by a first solenoid valve when a forward-movement range is selected, and is controlled by a second solenoid valve when a backward-movement range is selected. In addition, in the forward-movement range, the second solenoid valve controls hydraulic pressure applied to an OD/C which couples at a different gear position from the LR/B. When both solenoid valves fall into non-excitation states due to the breaking of an electric signal line, the failure of an AT ECU or the like, the output hydraulic pressures of the solenoid valves is held high and low, respectively. Therefore, even in this case, double coupling of the LR/B and the OD/C can be prevented in the forward-movement range as well as a predetermined gear position can be established in each of the forward-movement range and the backward-movement range.