Internal-combustion engines – Charge forming device – Heating of combustible mixture
Patent
1985-04-23
1986-04-15
Lazarus, Ronald H.
Internal-combustion engines
Charge forming device
Heating of combustible mixture
165 51, F02M 3100
Patent
active
045820406
ABSTRACT:
A fuel preheater and emission control device for heating fuel being supplied through a fuel conduit from a fuel supply to the engine, and thereby improving its combustion. Fuel heating is accomplished as a result of heat exchange between the fuel and engine coolant flowing in a coolant conduit. The preheater comprises a coolant tube adapted to have heated coolant flow therethrough and a fuel tube adapted to have fuel flow therethrough enroute to the engine. The fuel tube includes a coil having a plurality of convolutions extending around the exterior of the coolant tube and a downstream section extending for a substantial distance within the coolant tube. The region of the downstream section between the most downstream convolution and the location at which the downstream section enters the coolant tube is spaced from the coolant tube in a way to minimize the likelihood of vapor lock, while the downstream section assures adequate fast heating for improved cold-weather performance and emission control.
REFERENCES:
patent: 4436075 (1984-03-01), Campbell
patent: 4458642 (1984-07-01), Okubo
patent: 4463739 (1984-08-01), Niblett
Lazarus Ronald H.
Peterson Gordon L.
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