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. 14, 2014
Filed:
Mar. 09, 2010
Hiromichi Yasuda, Gotemba, JP;
Yusuke Suzuki, Hadano, JP;
Hiromichi Yasuda, Gotemba, JP;
Yusuke Suzuki, Hadano, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
Heat generation amount PV(θ) is calculated with the use of cylinder pressure P(θ), detected by a cylinder pressure sensor, cylinder volume V(θ), and specific heat ratio κ (stepsto). A crank angle θ, at which the value of PV(θ) peaks, is determined as a start crank angle, at which an adiabatic process after combustion starts (step). A correction coefficient Kis calculated based on the variation of the value of PV(θ) after θ(step). An actual heat generation amount PV(θ) is calculated with the use of the correction coefficient K(step). A cooling loss coefficient Kthat determines a correlation between the cooling loss and crank angles may be calculated based on a water temperature and an engine speed and the actual heat generation amount PV(θ) may be made to reflect the cooling loss coefficient K.