Intake vacuum sensing system with correction device for an inter

Details Intake vacuum sensing system with correction device for an inter Intake vacuum sensing system with correction device for an inter

1980-09-24

1983-03-22

Lall, P. S.

Internal-combustion engines

Charge forming device

Fuel injection system

123463, 123478, 73115, 73116, F02M 5100

Patent

active

043771459

ABSTRACT:
An intake vacuum sensor with a correction device for determining intake vacuum in an engine intake manifold can correct the sensor output when intake vacuum temperature introduced into the sensor is relatively high or the engine is driven for a relatively long period. The correction device comprises a memory unit for storing a correction coefficient, a correction circuit for correcting the sensor output based on the correction coefficient and a valve means for selectively introducing the intake vacuum and atomospheric air to the vacuum sensor. The memory unit, correction circuit and valve means are operatively responsive to the correction command from an engine control means.

REFERENCES:
patent: 3460520 (1969-08-01), Huber
patent: 3712275 (1973-01-01), Jackson
patent: 3908614 (1975-09-01), Ironside et al.
patent: 4111041 (1978-09-01), Rice
patent: 4165650 (1979-08-01), Weissler
patent: 4195531 (1980-04-01), Okamura

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