Internal-combustion engines – Charge forming device – Heating of combustible mixture
Patent
1993-03-04
1994-02-08
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Heating of combustible mixture
123556, 261142, 261DIG20, F02M 2314
Patent
active
052841227
ABSTRACT:
An internal combustion engine has a carburetor for mixing fuel with air entering through an inlet. A heat exchanger is mounted onto the carburetor air inlet so that heat from the heat exchanger is conducted to the carburetor housing. The heat exchanger has a plurality of channels through which air from an air cleaner pass on the way to the carburetor. An electric heating device attached to said heat exchanger and a first thermostat controls the electric heating device to raise the temperature of the heat exchanger when the fuel-air mixture falls below a given temperature. A second thermostat senses the temperature of the heat exchanger and prevents the temperature from exceeding a level at which a user's skin will blister if the exchanger is touched accidentally. In cold operating environments, the heat exchanger assembly raises the temperature of the air above the dew point, thus effectively lowering the relative humidity. The carburetor also is heated so that water vapor in the air will not condense on the surfaces of the carburetor. This prevents accumulation of water which can freeze and affect the operation of the carburetor.
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King James L.
Will Lawrence N.
Argenbright Tony M.
Kohler Co.
Macy M.
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