Title: Computer control of an exhaust gas recirculation device for an internal combustion engine

Abstract: Disclosed herein is a computer control system of an exhaust gas recirculation device for an internal combustion engine, wherein values of the parameters of desired EGR ratios when various conditions in the engine intake system exist are preliminarily stored in the memory of the computer, and wherein a value of a parameter is read out from the memory by detecting a value of the engine condition during its operation. In the system, values of temperature correction factors with respect to at least one temperature characteristic of the engine are also preliminarily stored in the memory. A temperature correction value is read out from the memory in accordance with a detected temperature value of at least one portion of the engine. The computer calculates the amount of EGR needed from the read out values of desired EGR and temperature correction and produces an electrical signal for controlling operation of the EGR value.

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Inventors: Nohira, Hidetaka (Mishima, JP)
Kobashi, Kiyoshi (Susono, JP)
Nakano, Jiro (Toyota, JP)

Application Number: 858533
Filing Date: 1977-12-07
Publication_date: 1979-08-07
Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Aichi, JP)
Primary Class(es): 701/108 123/568.27, 123/678
Other Classes:
US Patent Ref:

3799133	Mar, 1974	Frank	123/119.
3807376	Apr, 1974	Glockler et al.	123/119.
3969614	Jul, 1976	Moyer et al.	364/442.
4011845	Mar, 1977	Mayer et al.	123/119.
4018198	Apr, 1977	Williams	123/119.
4026256	May, 1977	Fenn	123/119.
4060065	Nov, 1977	Hata et al.	123/119.

Other Refs: 4977028

Jul, 1974	JP.

Primary Examiner: Gruber, Felix D.
Assistant Examiner:
Attorney: Stevens, Davis, Miller & Mosher