Method and apparatus for RPM limitation in internal combustion e

Details Method and apparatus for RPM limitation in internal combustion e Method and apparatus for RPM limitation in internal combustion e

1976-04-22

1977-11-15

Cox, Ronald B.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123118, 123 32EA, F02B 300, F02B 7700

Patent

active

040581063

ABSTRACT:
The maximum speed of an internal combustion engine is limited by a device which compares the period of rpm-synchronous pulses with the time constant of a reference multivibrator. If the engine rpm is so high that a pulse terminates prior to expiration of the reference time period, a gate is activated and acts through further multivibrator circuits to interrupt the fuel delivery to the engine, e.g., the fuel injection control pulses are suppressed. If the maximum rpm is exceeded only intermittently, the device restores normal fuel injection control pulses after a predetermined number of pulses has been suppressed. If the maximum rpm is exceeded continuously, the device restores normal fuel control somewhat later than the time at which the engine speed drops to below maximum rpm.

REFERENCES:
patent: 3572302 (1971-03-01), Wollesen
patent: 3601103 (1971-08-01), Swiden
patent: 3884203 (1975-05-01), Cliffgard
patent: 3916865 (1975-11-01), Kiencke

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