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:
May. 28, 1991
Filed:
Sep. 20, 1988
Keiji Bota, Hiroshima, JP;
Kenji Sawa, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A control system for a power train provided in a vehicle to include an engine which has an engine output adjusting device, such as a throttle valve, controlled through an electric actuator in accordance with a controlled variable on an accelerator and an automatic transmission in which a speed change operation is automatically performed utilizing operating oil pressure produced in an oil hydraulic control circuit for actuating a speed change mechanism in the automatic transmission having engaging friction elements and controlled to vary in accordance with an operating condition of the engine, which comprises a first detecting device for detecting the controlled variable on the accelerator, a second detecting device for detecting a controlled variable on the engine output adjusting device, a third detecting device for detecting a travelling speed of the vehicle, a device for controlling the speed change mechanism to cause the same to carry out the speed change operation based on detection outputs of the first and third detecting devices, and a device for controlling the operating oil pressure applied to the engaging friction elements in the speed change mechanism based on a detection output of the second detecting device.