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. 27, 2007
Filed:
Jul. 08, 2004
Yoichiro Goya, Susono, JP;
Hidenori Moriya, Susono, JP;
Yoichiro Goya, Susono, JP;
Hidenori Moriya, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An internal combustion engine () generates power by burning a mixture of fuel and air in each combustion chamber (). The internal combustion engine () is provided with an in-cylinder pressure sensor () disposed in the combustion chamber () and an ECU (). The ECU () calculates control parameters each of which is a product of an in-cylinder pressure detected by the in-cylinder pressure sensor () and a value obtained by exponetiating an in-cylinder volume at timing of detecting the in-cylinder pressure with a predetermined index at two predetermined points during a period from opening timing of an intake valve (Vi) to closing timing thereof, and calculates a quantity of air aspirated into each combustion chamber () based upon a difference in the control parameter between the two predetermined points.