System for monitoring and improving motor vehicle operating effi

Details System for monitoring and improving motor vehicle operating effi System for monitoring and improving motor vehicle operating effi

1979-04-13

1981-07-28

Lall, P. S.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123198D, 623231, 307 10R, F02B 7700, F25B 2700

Patent

active

042804574

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.

REFERENCES:
patent: 2601757 (1952-07-01), Horton
patent: 3606764 (1971-09-01), Yokouchi et al.
patent: 3678912 (1972-07-01), Hensler
patent: 3686891 (1972-08-01), Wills
patent: 3918543 (1975-11-01), Halem
patent: 4135368 (1979-01-01), Mohr et al.
patent: 4144862 (1979-03-01), Estkowski
patent: 4206613 (1980-06-01), Shockley

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