Cruise control system using positive pressure to boost vacuum

Details Cruise control system using positive pressure to boost vacuum Cruise control system using positive pressure to boost vacuum

1977-12-27

1979-01-16

Betts, Kenneth H.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

123103R, 417190, B60K 3100

Patent

active

041344707

ABSTRACT:
An aspirator using pressure from a suitable source boosts the vacuum available when intake vacuum drops. The pressure source may be the A.I.R. pump, for example. At low throttle settings engine vacuum is high and pump pressure is low. At 25% throttle engine vacuum is lower and the A.I.R. pump pressure is higher. With some flow the output vacuum from the aspirator is greater than the engine vacuum. This is also true at greater throttle openings. The device has a regulation effect causing output variation to be less than the variation in manifold vacuum. This makes the lock-up transient and lockup error less dependent on engine speed and makes cruise performance more uniform over the entire range of cruise speeds.

REFERENCES:
patent: 1417853 (1922-05-01), Nash
patent: 1560190 (1925-11-01), Richard
patent: 1820884 (1931-08-01), Hueber
patent: 2747790 (1956-05-01), Schnitz
patent: 3322227 (1967-05-01), Thorner
patent: 3441104 (1969-04-01), Hagler

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