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:
Mar. 31, 2009
Filed:
Feb. 13, 2007
Hideki Asano, Obu, JP;
Katsumi Ishida, Obu, JP;
Tsutomu Miyazaki, Aichi-ken, JP;
Kazuhiro Minamitani, Toyota, JP;
Shigeru Kamio, Nagoya, JP;
Akihiro Kamiya, Takahama, JP;
Hideki Asano, Obu, JP;
Katsumi Ishida, Obu, JP;
Tsutomu Miyazaki, Aichi-ken, JP;
Kazuhiro Minamitani, Toyota, JP;
Shigeru Kamio, Nagoya, JP;
Akihiro Kamiya, Takahama, JP;
Aisan Kogyo Kabushiki Kaisha, Obu-shi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Denso Corporation, Kariya, JP;
Abstract
A throttle control apparatus comprises a throttle valve placed in an intake passage, a motor for driving the throttle valve, an electronic control unit (ECU) for controlling the motor, and a throttle sensor for detecting an actual opening degree of the throttle valve. The ECU determines that the throttle valve is frozen when the actual opening degree does not reach a target opening degree even after a driving time for driving the motor has exceeded a predetermined time, and then stores the actual opening degree at the time as an icing opening degree. The ECU supplies a driving duty to cause the motor to produce required driving torque for removal of icing and reverses the driving duty by open control, and controls the motor to bring an accumulated value of a deviation between the target opening degree and the icing opening degree to zero, thereby repeatedly swinging the throttle valve.