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:
Mar. 03, 1992
Filed:
Dec. 04, 1989
Hayato Sugawara, Katsuta, JP;
Kenji Ohta, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Automotive Engineering, Ltd., Ibaraki, JP;
Abstract
A throttle valve position controlling apparatus comprises a motor serving to adjust the opening degree of a throttle valve disposed in an intake pipe of an engine, an air flow sensor attached to the intake pipe so as to detect an intake air amount, and a throttle control unit which is operative to obtain a deviation between a command air amount set beforehand and the intake air amount detectd by the air flow sensor and to effect a feed back control on the motor so as to minimize the deviation to zero. A slip controlling apparatus comprises revolution sensors for detecting the number of revolutions of driving wheels and driven wheels of a car, a slip control unit which has a table in which command air amounts are set beforehand in correspondence with the degree of slip and is operative to judge whether or not the car is in the state of slip from the results of detection by the revolution sensors and to retrieve the table, when the car is in the state of slip, so as to obtain a command air amount corresponding to the judged degree of slip.