Start circuit with anti-restart circuitry

Details Start circuit with anti-restart circuitry Start circuit with anti-restart circuitry

1995-05-15

1996-10-15

Dolinar, Andrew M.

Internal-combustion engines

Starting device

Condition responsive control of starting device

290 38R, F02N 1108

Patent

active

055643752

ABSTRACT:
A start circuit including: a current source; a start switch connected to the current source; a starter relay connected to the start switch; an anti-restart module connected to the starter relay, the anti-restart module including: a bi-directional thyristor having a gate, a first terminal connected to the starter relay and a second terminal connected to a ground; and a diode having a cathode and an anode, the anode being connected to the gate so as to allow current flow from the gate through the anode to the cathode; and a normally closed switch connected between the cathode and the ground, the normally closed switch becoming open upon detecting an engine run condition. The bi-directional thyristor A) is conductive when a) the cathode is connected to the ground through the normally closed switch and b) the start switch is closed so that the current source is electrically connected to the first terminal through i) the start switch and ii) the starter relay and B) latches when a) the start switch is closed and b) a current flows between the first terminal and the second terminal so that the current continues to flow through the bi-directional thyristor when the normally closed switch opens until the starter switch is opened.

REFERENCES:
patent: 3543039 (1970-11-01), Mosier
patent: 3783301 (1974-01-01), Nieukirk
patent: 4570583 (1986-02-01), Hamano et al.
patent: 4622930 (1986-11-01), Hamano et al.
patent: 4907562 (1990-03-01), Johansson et al.
patent: 4930466 (1990-06-01), Osborne, Jr.
patent: 4951620 (1990-08-01), Staerzl
patent: 4984543 (1991-01-01), Tharman
patent: 4986228 (1991-01-01), Tharman
patent: 5190019 (1993-03-01), Harvey
patent: 5195476 (1993-03-01), Schwarz

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