Method for recognizing the power stroke of a four-stroke engine

Details Method for recognizing the power stroke of a four-stroke engine Method for recognizing the power stroke of a four-stroke engine

1993-10-06

1995-04-04

Raevis, Robert

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

054026750

ABSTRACT:
A method for recognizing a power stroke of each cylinder in a four-stroke engine calls for sensing a parameter of a cylinder in the engine for producing a signal of the parameter, the parameter being selected from the group consisting of pressure and knocking, and comparing the signal with a threshold value for determining whether the signal exceeds the threshold value and thereby is indicative of the cylinder being in a corresponding combustion stroke. In addition to sensing the pressure and knocking of the cylinder, sensing of sound signals from the cylinder is also employed in order to determine power and intake strokes of the cylinders.

REFERENCES:
patent: 4147054 (1979-04-01), Hohenberg et al.
patent: 4424709 (1984-01-01), Meier, Jr. et al.
patent: 4730484 (1988-03-01), Olshefski
patent: 4744243 (1988-05-01), Tanaka
patent: 4899711 (1990-02-01), Tabara et al.
Patent Abstracts of Japan, vol. 3, No. 158, Dec. 1979, & JP-A-54 137524 (Hino Jidosha Kogyo K.K.) Oct. 1979.
"Motronic", Robert Bosch GmbH, 1993.

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