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. 05, 1992
Filed:
Jan. 17, 1990
Applicant:
Inventors:
Klaus Zahn, Oestringen, DE;
Werner Schmidt, Mannheim, DE;
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74866 ; 74878 ; 74877 ; 475208 ; 475256 ;
Abstract
A power shift stage in the driveline of an internal combustion engine, is shifted depending on the load on the engine between at least two rotational speed ratios. A control system automatically controls shifting to improve driving comfort and increase productivity. The control system includes a switch connected to a fuel adjusting element or throttle, an engine rotational speed sensor and a control unit. The control unit automatically shifts the power shift stage in dependence upon the status of the switch and upon the sensed engine speed.