Control device for internal combustion engine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8793058
APP PUB NO 20120085318A1
SERIAL NO

13121325

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ATTORNEY / AGENT: (SPONSORED)

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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-KEN15535

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawakami, Hajime Susnono, JP 37 362
Okazaki, Shuntaro Sunto-gun, JP 54 160
Shibayama, Masashi Sunto-gun, JP 12 11
Shokatsu, Kaoru Susnono, JP 6 3
Yoshizaki, Satoshi Gotemba, JP 32 58

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MAZDA MOTOR CORPORATION (1)
* 6178943 Control system for an engine 25 1999
 
HYUNDAI MOTOR COMPANY (1)
* 7520263 Engine torque control apparatus and engine torque control method 2 2007
 
NISSAN MOTOR CO., LTD. (1)
6058906 Fuel/air ratio control for internal combustion engine 75 1998
 
FORD GLOBAL TECHNOLOGIES, INC. (1)
* 6425373 System and method for determining engine control parameters based on engine torque 16 1999
 
HITACHI, LTD. (2)
* 5660157 Output torque control apparatus and method for an internal combustion engine 17 1995
* 5979404 Output torque control apparatus and method for an internal combustion engine 26 1997
* Cited By Examiner

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