Title: Method and apparatus for determining the injection time in externally ignited internal combustion engines

Abstract: A method and an apparatus for the determination of the injection time in externally ignited internal combustion engines, which serve to provide the optimal injection time under given operating conditions, this injection time being derived on the basis of the rpm and the angle of the throttle valve wherein a basic injection time signal is derived from an rpm and a throttle valve angle signal and this signal is subsequently modified by means of a controlled nonlinear function generator to closely approximate an empirically ascertained optimal value for the injection time under given operating conditions, the basic injection time signal being formed in a divider circuit to provide an output signal which is fed to at least one nonlinearity function generator controllable in accordance with the throttle valve angle and the rpm.

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Inventors: Anlauf, Jurgen (Goppingen, DE, US)
Schnurle, Hans (Walheim, DE, US)

Application Number: 930110
Filing Date: 1978-08-01
Publication_date: 1980-04-01
Assignee: Robert Bosch GmbH (Stuttgart, DE)
Primary Class(es): 123/488 123/478
Other Classes:
US Patent Ref:

3483364	Dec, 1969	Leeso, Jr.	123/32.
3724430	Apr, 1973	Adler	123/32.
3750632	Aug, 1973	Zechnall	123/32.
3796197	Mar, 1974	Locher et al.	123/32.
4034722	Jul, 1977	Miyakawa	123/32.
4048964	Sep, 1977	Kissel	123/139.

Other Refs: 2426976

May, 1976	DE

Primary Examiner: Lazarus, Ronald H.
Assistant Examiner: Lall, P. S.
Attorney: Greigg; Edwin E.