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. 04, 2016
Filed:
May. 23, 2014
Brent a Smith, Peosta, IA (US);
Mark E Hull, Peosta, IA (US);
Nathan J Horstman, Durango, IA (US);
Jeffrey a Bauer, Dubuque, IA (US);
Trent a Luoma, Dubuque, IA (US);
Neil V Harber, Holy Cross, IA (US);
Brent A Smith, Peosta, IA (US);
Mark E Hull, Peosta, IA (US);
Nathan J Horstman, Durango, IA (US);
Jeffrey A Bauer, Dubuque, IA (US);
Trent A Luoma, Dubuque, IA (US);
Neil V Harber, Holy Cross, IA (US);
DEERE & COMPANY, Moline, IL (US);
Abstract
A vehicle and drive system control method for a vehicle including first and second traction elements coupled to the vehicle, a variable displacement pump, a bi-directional variable displacement first motor coupled to the first traction element, and a bi-directional second motor coupled to the second traction element. The pump, and first and second motors are coupled fluidly in series with one another. A control unit can determine a desired speed for the traction elements, and determine pump, first and/or second motor displacements based on the desired speed. First and second speed sensors can sense output speeds of the motors, and the pump, first and/or second motor displacements can be determined based on the motor output speeds. Articulation and steering sensor signals can also be used to determine pump, first and/or second motor displacements.