Power control device

Details Power control device Power control device

1975-10-08

1976-12-28

Ostrager, Allen M.

Power plants

Motor operated by expansion and/or contraction of a unit of...

Unit of mass is a gas which is heated or cooled in one of a...

60660, 290 2, 290 40B, F02G 106

Patent

active

039993884

ABSTRACT:
A hot gas engine uses inexpensive digital solenoid type control valves to govern engine output as a function of the amount of working gas. Electrical control signals are obtained by comparing a generator voltage derived from engine speed with a control voltage to develop a set of control signals including pulse width modulated pulses which are open over a duty cycle which produces the effect of analog solenoid valve control.

REFERENCES:
patent: 3397533 (1968-08-01), Steiner et al.
patent: 3527049 (1970-09-01), Bush
patent: 3699770 (1972-10-01), Bennethum

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