The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 1991
Filed:
Aug. 24, 1989
Kenneth L Rische, Canton, MI (US);
Roger D Affeldt, Davisburg, MI (US);
Edward A Urbanek, Jr, Southgate, MI (US);
McGuane Industries, Auburn Hills, MI (US);
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.