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:
Apr. 22, 2008
Filed:
Mar. 31, 2006
Yuji Narita, Kariya, JP;
Yoshiyuki Takahashi, Kariya, JP;
Hisanobu Suzuki, Toyota, JP;
Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A main control computer commands a second sub-control computer to perform a reduced-cylinder operation when the coolant temperature detected by a coolant temperature sensor is greater than or equal to a reference temperature, and the exhaust temperature detected by a temperature sensor is less than a reference exhaust temperature and is within a reduced-cylinder operation allowable range in which a combination of the engine speed and the engine load is set in advance. The second sub-control computer deactivates a second cylinder group based on a command of the reduced-cylinder operation. The main control computer commands a first sub-control computer and the second sub-control computer to perform an all-cylinder operation when the coolant temperature detected by the coolant temperature sensor is less than the reference temperature, and the exhaust temperature detected by the temperature sensor is greater than or equal to the reference exhaust temperature or is out of the reduced-cylinder operation allowable range in which a combination of the engine speed and the engine load is set in advance.