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:
Jul. 10, 2001
Filed:
Apr. 27, 2000
Jun Harada, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An air-conditioning system heats the passenger compartment with coolant circulating in the water jacket of an engine. An electronic control unit of the engine controls the engine to perform homogeneous-charge combustion when the engine load is high and to perform stratified-charge combustion when the engine load is low. However, the ECU further controls the engine to perform the homogenous-charge combustion when the heating performance of the air-conditioning system is insufficient. This lowers the heat efficiency of the engine and increases heat transferred from combustion gas to the coolant. As a result, the heating performance of the air-conditioning system will be sufficient.