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:
Apr. 07, 2020
Filed:
Nov. 21, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Jun Goto, Nagoya, JP;
Kenta Kumazaki, Anjo, JP;
Masato Yoshikawa, Toyota, JP;
Nobufusa Kobayashi, Anjo, JP;
Hiromichi Kimura, Okazaki, JP;
Kazuyuki Shiiba, Miyoshi, JP;
Tooru Matsubara, Toyota, JP;
Takeshi Kitahata, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A control apparatus () for a vehicular drive system () having a step-variable transmission portion () which is shifted to a selected one of speed positions having respective speed ratio values, with engaging and releasing actions of coupling devices (B, C), and a drive power source portion () operatively connected to an input shaft () of the step-variable transmission portion, the control apparatus being configured to implement a speed synchronizing control upon a shift-down action of the step-variable transmission portion in a coasting run of a vehicle (), wherein an input shaft speed of the step-variable transmission portion is raised with an input shaft torque transmitted from the drive power source portion to the input shaft, from a pre-shift-down synchronizing speed to a post-shift-down synchronizing speed. The control apparatus includes a torque control portion () configured to change the input shaft torque transmitted from the drive power source portion () to the input shaft () during the speed synchronizing control, on the basis of a temperature of a lubricant in the step-variable transmission portion such that the input shaft torque is larger when the lubricant temperature is comparatively low than when the temperature is comparatively high.