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. 06, 1990
Filed:
May. 24, 1989
Yoshihiko Sakurai, Saitama, JP;
Diesel Kiki Co., Ltd., Tokyo, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A method of controlling the idling rotational speed of an internal combustion engine for an automotive vehicle equipped with an air conditioning system having a variable capacity compressor disposed to be driven by the engine and capable of being controlled by an external control signal. A value of a capacity control signal as the external control signal for controlling the capacity of the compressor is calculated. A value of torque required for starting the compressor is calculated based upon ambient temperature and the calculated value of the capacity control signal. The engine idling rotational speed is increased in accordance with the calculated starting torque. When the ambient temperature is higher than a predetermined value, the required starting torque is calculated based only upon the ambient temperature irrespective of the calculated value of the capacity control signal, whereas when the ambient temperature is lower than the predetermined value, the required starting torque is calculated based upon both the ambient temperature and the calculated value of the capacity control signal.