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:
Oct. 28, 1997
Filed:
Feb. 29, 1996
Hideo Furukawa, Wako, JP;
Tatsuyuki Ohashi, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A vehicle automatic transmission control system having a torque converter having an input connected to an internal combustion engine mounted on the vehicle and an output connected to a gear system of the transmission, which makes it possible to estimate an ATF temperature without using an expensive ATF temperature sensor. The estimation of the ATF temperature is configured such that based on the coolant temperature at engine starting, it calculates the temperature increase owing to heat inflow to the ATF per unit time and the temperature decrease owing to heat outflow from the ATF per unit time quantitatively and uses the sum of the calculated values to determine the estimated ATF temperature TATF. The parameters used for calculating the temperature include the state of the torque converter, the type of gearshift, a vehicle speed (temperature increase owing to stirring of the ATF), the state of a heat exchanger, and the like.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile