Method and apparatus for monitoring intake manifold vacuum

Details Method and apparatus for monitoring intake manifold vacuum Method and apparatus for monitoring intake manifold vacuum

1976-11-15

1978-02-07

Myracle, Jerry W.

Measuring and testing

Vehicle drive train

Rear end

G01L 2324

Patent

active

040720470

ABSTRACT:
A method and apparatus for continuously monitoring and telemetering the condition of the vacuum pressure in the intake manifold of an automotive vehicle. The vacuum pressure is continuously sampled by a vacuum-pressure-sensitive device having one end that moves responsive to changes in the vacuum pressure. Mounted on the movable end of the device is a scanning arrangement that moves a pair of metal strips across the front of two light barrier devices as the pressure changes. In the preferred form, the two light barrier devices each consist of a photo-diode transmitter and a photo-transistor receiver. The output from the light barrier devices consists of an electrical signal having three stages as the pressure increases or decreases. The electrical signal passes through a switching arrangement which successively lights up three different-colored lights to inform the operator as to the condition of the vacuum in the intake manifold.

REFERENCES:
patent: 3894435 (1975-07-01), Shimada et al.
patent: 3922909 (1975-12-01), Dixson et al.
patent: 3937202 (1976-02-01), Heath

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