Vehicle speed limiting device

Details Vehicle speed limiting device Vehicle speed limiting device

1979-06-18

1981-10-13

Cox, Ronald B.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123390, 123358, F02B 7700

Patent

active

042942047

ABSTRACT:
A vehicle speed limiting device is designed for use with diesel engines, particularly those in over-the-road trucks. A D.C. pulse generator is attached at the wheel or transmission speedometer pickup and provides a signal to a speed switch which includes a frequency-to-voltage converter which processes the pulse signal. The converter output is then compared to a reference voltage corresponding to a predetermined speed limit, generally 55 miles an hour. When the vehicle speed and corresponding voltage exceeds the reference voltage and speed, the comparator operates a relay which opens or closes a solenoid valve in the fuel supply line of the truck. In most applications, the solenoid valve is placed between the fuel pump and the injector and fuel flow is diverted from the injectors to the upstream side of the pump. A small amount of fuel is allowed to continue to the injectors to provide for proper lubrication thereof.

REFERENCES:
patent: 3590798 (1971-07-01), Goodwin
patent: 3661130 (1972-05-01), Eheim
patent: 3735742 (1973-05-01), Aono
patent: 3809028 (1974-05-01), Luchaco
patent: 3885644 (1975-05-01), Seidler
patent: 4020814 (1977-05-01), Hewitt
patent: 4178901 (1979-12-01), Cunningham

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