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. 21, 2008
Filed:
Sep. 09, 2005
Kanako Shimojo, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Kanako Shimojo, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control system which is capable of avoiding an overloaded state of an actuator without using sensors or the like. An ECUof the control systemcalculates a lift control input U_Liftin to a variable valve lift mechanismwith an algorithm expressed by equations (2) to (5), such that the valve lift Liftin follows up a target valve lift Liftin_cmd, calculates a cumulative value Simot by cumulative calculation of the product of the value Imot of electric current flowing through the variable valve lift mechanismand a sampling time period Stime, and when SImot≧Simot_Jholds, sets two parameters pole_f_lf and ploe_lf to respective predetermined failure-time parameters pole_f_lf_Jand ploe_lf_Jwhich cause the lift control input U_Liftin to become smaller than when Simot<Simot_Jholds.