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:
Feb. 17, 2015
Filed:
Jun. 21, 2011
Jae Won Jung, Gyeonggi-do, KR;
Soon Woo Kwon, Gyeonggi-do, KR;
Kyu IL Lee, Gyeonggi-do, KR;
Sung Jin Chung, Gyeonggi-do, KR;
Sung Gone Yoon, Gyeonggi-do, KR;
Jae Won Jung, Gyeonggi-do, KR;
Soon Woo Kwon, Gyeonggi-do, KR;
Kyu Il Lee, Gyeonggi-do, KR;
Sung Jin Chung, Gyeonggi-do, KR;
Sung Gone Yoon, Gyeonggi-do, KR;
Hyundai Motor Company, Seoul, KR;
Abstract
The present invention provides a technique for controlling creep torque to prevent a vehicle from rolling backward on an upward slope. In particular, a gradient of a road is calculated in real time from a detection value of a sensor and vehicle acceleration. A maximum creep torque for preventing roll-back caused by gravity according to the gradient is calculated using the gradient and vehicle information. A first creep torque reference is calculated based on the maximum creep torque and the vehicle speed. A second creep torque reference is calculated based on the maximum creep torque and the vehicle acceleration. A torque command value according to an operation state of a brake is calculated based on the first creep torque reference value and the second creep torque reference value and the gradient. In response, a torque output of a driving motor is controlled according to the calculated torque command value.