Thermal throttle actuator

Details Thermal throttle actuator Thermal throttle actuator

1989-08-24

1991-01-15

Dolinar, Andrew M.

Internal-combustion engines

Starting device

For airplane

123339, 261 391, 261 65, F02D 902

Patent

active

049845420

ABSTRACT:
A thermal throttle actuator adapted to be mounted in an opening of a throttle body of an internal combustion engine wherein the fuel system is electronically controlled. The thermal throttle actuator comprises a housing in which a plunger is mounted for reciprocating movement and is adapted to contact a spring loaded throttle plate in the throttle body. The plunger is yieldingly urged toward the throttle plate by a bias spring. A shape memory alloy in the shape of a helical spring is provided to produce a force on the plunger in a direction opposite to that of the bias spring when the shape memory alloy is heated to a temperature above a predetermined temperature. When the temperature is below the predetermined temperature, the shape memory alloy spring is readily deformable, the bias spring functions to provide a force on the throttle plate which maintains the throttle plate in an open position to enhance performance during cold starting of the engine.

REFERENCES:
patent: 2868185 (1959-01-01), Bellicardi
patent: 3695591 (1972-10-01), Caisley
patent: 4096212 (1978-06-01), Rogerson et al.
patent: 4099506 (1978-07-01), Kolb
patent: 4222236 (1980-09-01), Hegedus et al.
patent: 4311653 (1982-01-01), Kushida
patent: 4630578 (1986-12-01), Nusser et al.

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