Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-06-06
1979-01-16
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123119A, 123 32EK, F02P 100
Patent
active
041343743
ABSTRACT:
A method and apparatus for detecting cylinder malfunction by monitoring the actual rotational speed in an internal combustion engine, e.g. with an inductive transducer. This signal is compared in phase with pulses from a voltage controlled oscillator, the control voltage of which comes from an integrating circuit driven by the phase comparison signal in the manner of a phase-locked loop.
The VCO pulses are used to clock a shift register and the actual pulses provide the data input for the shift register. Thus, the relative arrival time of the two pulse trains determines the contents of the shift register. Decoding circuitry is used to interrogate the shift register and to actuate an output device when the contents of the register indicate an unsymmetric periodicity, caused by cylinder malfunction.
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Bianchi Valerio
Latsch Reinhard
Zeller Hans
Greigg Edwin E.
Myhre Charles J.
Nelli R. A.
Robert & Bosch GmbH
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