Control device for carburetor
First Claim
1. In a carburetor comprising an idle and low speed circuita control valve mounted in said circuit for controlling admission of fuel-air mixture in said circuit,first means for generating a first signal the amplitude of which is representative of the amplitude of the variations between the durations of two engine cycles, andsecond means for generating a control signal for controlling said valve to modulate admission of said fuel-air mixture,said second means being responsive to said first signal for generating said control signal whose duration decreases as a function of the level of said first signal.
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Accused Products
Abstract
A control circuit for delivering control signals to interrupt admission of the fuel-air mixture in the low speed and idle circuit of the carburetor of an internal combustion engine. The control circuit is operated according to the engine operating conditions. The control signal is delivered in response to comparison of a signal whose level is representative of the amplitude of the variations, i.e., the absolute value of the variations in the duration of an engine cycle, with a substantially periodic signal to generate a pulse-shaped signal. The pulses have a relatively narrow width when the amplitude of the variations is great, and a larger width when the amplitude of the variations is smaller.
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Citations
20 Claims
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1. In a carburetor comprising an idle and low speed circuit
a control valve mounted in said circuit for controlling admission of fuel-air mixture in said circuit, first means for generating a first signal the amplitude of which is representative of the amplitude of the variations between the durations of two engine cycles, and second means for generating a control signal for controlling said valve to modulate admission of said fuel-air mixture, said second means being responsive to said first signal for generating said control signal whose duration decreases as a function of the level of said first signal.
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10. Control circuit for generating a control signal adapted to close a normally open valve disposed in the idle and low speed circuit of a carburetor for an engine, said control circuit comprising:
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first means for generating a first signal representative of the amplitude of the variations between the durations of two successive engine cycles, second means for generating a substantially periodic second signal, first comparing means for comparing said first and second signals and for delivering said control signal whenever said first and second signals are in a predetermined relationship, the duration of said control signal being a decreasing function of the value of said first signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification