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:
Nov. 12, 2002
Filed:
Aug. 23, 2000
Shoji Katsumata, Gotenba, JP;
Toshio Fuwa, Nagoya, JP;
Keiji Yoeda, Numazu, JP;
Isao Matsumoto, Susono, JP;
Takashi Izuo, Toyota, JP;
Tatsuo Iida, Toyota, JP;
Hiroyuki Hattori, Toyota, JP;
Masahiko Asano, Toyota, JP;
Yoshinori Kadowaki, Toyota, JP;
Akihiro Yanai, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
The invention relates to a control apparatus for controlling a solenoid valve that functions to displace one of an intake valve or an exhaust valve of an internal combustion engine. The object of the invention is to adjust, when a valve element connected to the solenoid valve is displaced between a valve-open position and a valve-closed position, the magnitude of an electromagnetic force displacing the valve element, to a controlled value based on a pressure acting on the valve element. The solenoid valve displaces the valve element ( ) by a cooperation of resilient forces of an upper spring ( ) and a lower spring ( ) and electromagnetic forces of an upper coil ( ) and a lower coil ( ). In the control apparatus, a pressure acting on the valve element ( ) is detected directly or indirectly. When the valve element is displaced from one of the valve-open position and the valve-closed position to the other position, the magnitude of an electromagnetic force to displace the valve element ( ) to the other position is adjusted to a controlled value based on the valve-element pressure detected.