Title: Early fuel evaporation carburetion system

Abstract: A carburetion system for providing improved cold start engine operation comprises a carburetor having an air-fuel passage, an air inlet to the passage, a fuel inlet to the passage for mixing fuel and air in the passage, and an outlet from the passage for delivering a mixture of air and vaporized fuel to the engine. A heater comprising a ceramic resistor body of a material of positive temperature coefficient of resistivity has a plurality of passages extending through the body and has means directing electrical current through the body for heating the body. The heater is mounted at the outlet of the air-fuel passage of the carburetor with the heater body passages aligned with the air-fuel passage to pass the air-fuel mixture through the heater passages in heat-transfer relation to the body to facilitate vaporization and mixing of the fuel in the air-fuel mixture.

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Inventors: Marcoux, Leo (Rehoboth, MA, US)
Berg, Peter G. (Norton, MA, US)

Application Number: 721728
Filing Date: 1976-09-09
Publication_date: 1979-02-27
Assignee: Texas Instruments Incorporated (Dallas, TX)
Primary Class(es): 123/549 123/552, 219/206, 219/207, 261/142, 392/502
Other Classes:
US Patent Ref:

2433374	Dec, 1947	Kruschke	219/207.
3262190	Jul, 1966	Rostoker	219/381.
3625190	Dec, 1971	Boissevain	123/122.
3666924	May, 1972	Jensen	219/505.
3719796	Mar, 1973	Abildtrup	219/381.
3927300	Dec, 1975	Wada	219/381.
3956614	May, 1976	Hervert	219/381.
3987772	Oct, 1976	McBride	123/122.
4020812	May, 1977	Hayward	219/206.

Other Refs:
Primary Examiner: Lazarus, Ronald H.
Assistant Examiner:
Attorney: Haug; John A., McAndrews; James P.