System for monitoring and improving motor vehicle operating efficiency
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United States of America Patent
Stats
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Jul 28, 1981
Issued Date -
N/A
app pub date -
Apr 13, 1979
filing date -
Mar 23, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system responsive to engine manifold pressure for monitoring engine operating efficiency and reducing engine load during periods of low operating efficiency is disclosed. The system includes a switch which actuates a first relay when manifold vacuum pressure drops below a threshold level. In this condition, the first relay activates a time delay relay in the control circuit of the air conditioning compressor to remove this load from the engine after a first interval and maintain it in the off condition for a second interval.
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