Device for controlling the intake air temperature of a carbureto

Internal-combustion engines – Charge forming device – Heating of combustible mixture

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123552, 236 13, F02M 3100

Patent

active

042313430

ABSTRACT:
A device for adjusting the intake air temperature of a carburetor-equipped internal combustion engine whose air intake system has a flapper valve in a duct junction admitting cold raw air and/or preheated raw air to the intake filter, depending on the raw air temperature, the flapper valve position being controlled by a pneumatic membrane actuator which receives negative pressure from the intake manifold, via a vacuum line with a thermostat-controlled relief valve responsive to the temperature of the air mixture. In the drive connection between the membrane actuator and the flapper is arranged a wax thermostat which increases or decreases the effective length of the connection in response to the ambient air temperature, thereby adding the thermostat displacements to the actuator displacements, the effective length of the drive connection being further adjustable by means of a threaded connection which is arranged between the membrane support body of the actuator and the wax thermostat.

REFERENCES:
patent: 3830210 (1974-08-01), Muller
patent: 4144857 (1979-03-01), Bendig
patent: 4161930 (1979-07-01), Bendig

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