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:
Sep. 05, 2000
Filed:
Sep. 16, 1998
Applicant:
Inventor:
Toshiya Fukumoto, Sakai, JP;
Assignee:
Kubota Corporation, , JP;
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
192-358 ; 192-362 ; 192 / ; 1921 / ;
Abstract
In carrying out a shifting operation in a working vehicle such as a tractor, an actual acceleration of the working vehicle is measured, and a feedback control of a control hydraulic pressure applied to a hydraulic clutch is performed to fix a jerk which is a differentiation of the measured acceleration with respect to time. Thereafter, a feedback control is performed to fix the acceleration. A theoretical running speed is derived from a rotating speed of the engine and a speed position detected. When an actual speed of the working vehicle becomes equal to the theoretical running speed, The control hydraulic pressure applied to the hydraulic clutch is increased to a maximum.