Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1976-05-06
1978-09-05
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123 32EE, F02M 700
Patent
active
041111710
ABSTRACT:
A closed-loop mixture control system for an internal combustion engine comprises an exhaust composition sensor, a comparator for comparing the signal derived from the sensor with a reference point to determine whether the air-fuel ratio of the mixture is above or below a desired value, and a sample-and-hold circuit for sampling the comparator output at intervals equal to or longer than the transport delay time of the engine and holding the sampled signals until the next sampling occurs. The output from the sample-and-hold circuit is connected to a controller for proportional amplification to vary the fuel quantity proportionally to the input signal applied thereto. Preferably, the system includes an analog shift register into which is serially clocked the output from the sample-and-hold circuit synchronously with the sampling frequency and then clocked out in parallel form to a weighting network before amplification by the controller.
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Aono Shigeo
Asano Masaharu
Adams Bruce L.
Burns Robert E.
Dolinar Andrew M.
Lobato Emmanuel J.
Myhre Charles J.
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