US Patent Application No: 2012/0085,318

Number of patents in Portfolio can not be more than 2000

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

ALSO PUBLISHED AS: 8793058

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Abstract

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A control device for an internal combustion engine provided by the present invention is a control device which can satisfy both a requirement relating to exhaust gas performance of the internal combustion engine and a requirement relating to operation performance by properly regulating a change speed of a required air-fuel ratio, in the internal combustion engine which uses torque and an air-fuel ratio as control variables. The control device receives the requirement relating to the exhaust gas performance of the internal combustion engine, and calculates an air-fuel ratio which satisfies the requirement as a required air-fuel ratio. When a predetermined reduction condition is not satisfied, an original required air-fuel ratio is directly determined as a final required air-fuel ratio. However, when the reduction condition is satisfied, the change speed is reduced by processing the signal of the original required air-fuel ratio, and determines the required air-fuel ratio with the change speed reduced as the final required air-fuel ration. The reduction condition includes a condition that the change amount of the original required air-fuel ratio, in more detail, a change amount per calculation period is larger than a predetermined air-fuel ratio change determination value.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TOYOTA JIDOSHA KABUSHIKI KAISHAAICHI-KEN11179

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawakami, Hajime Nishinomiya, JP 52 255
Okazaki, Shuntaro Susono, JP 68 63
Shibayama, Masashi - 15 0
Shokatsu, Kaoru - 12 0
Yoshizaki, Satoshi Susono-shi, JP 29 25

Cited Art Landscape

Patent Info (Count) # Cites Year
 
HITACHI, LTD. (2)
* 5,660,157 Output torque control apparatus and method for an internal combustion engine 17 1995
* 5,979,404 Output torque control apparatus and method for an internal combustion engine 26 1997
 
FORD GLOBAL TECHNOLOGIES, INC. (1)
* 6,425,373 System and method for determining engine control parameters based on engine torque 14 1999
 
HYUNDAI MOTOR COMPANY (1)
* 7,520,263 Engine torque control apparatus and engine torque control method 1 2007
 
MAZDA MOTOR CORPORATION (1)
* 6,178,943 Control system for an engine 20 1999
* Cited By Examiner

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