Patent · US Expired

Apparatus for generating an ignition control signal for an internal combustion engine

US4326486A · kind A · utility

4Cited by

2References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Manfred Mezger · Markgröningen, DE
Reinhard Leussink · Leinfelden, DE
Adolf Fritz · Stuttgart, DE

Key dates

Filing date	Oct 4, 1979
Grant date	Apr 27, 1982
Priority date	—
Expiry date	Oct 4, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In order to control the spark advance of an internal combustion engine in the idling domain, the invention provides circuitry for increasing the spark advance below an upper rpm limit and returning the ignition timing to normal when the engine speed drops below a second lower limit. The continuous temporal shift of an output signal which may be used for engaging the ignition control system of the engine is provided by a very small number of elements, in particular only two timing elements, a flip-flop and a number of logical gates. The two flip-flops are triggered by the respective leading and trailing edges of the engine speed transducer signal. One of the flip-flops defines the upper engine speed limit while the second timing element defines the lower engine speed limit. Two embodiments of the invention are described.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.