Internal-combustion engines – Charge forming device – Heating of combustible mixture
Patent
1995-09-25
1997-08-12
McMahon, Marguerite
Internal-combustion engines
Charge forming device
Heating of combustible mixture
F02G 500, F02M 1500, F02M 2314
Patent
active
056555067
ABSTRACT:
A temperature control system in an internal combustion engine includes a heating arrangement which channels a flow of temperature control fluid from an engine to and from a heat exchanger used to preheat intake air flowing to an engine intake manifold when the ambient air temperature is relatively cold (e.g., below 20.degree. F.). In one embodiment, the heat exchanger is mounted upstream from a throttle body. The heat exchanger consists of a panel of high capacity heat transferring fins, which are heated by heat conductive tubes wrapped around the periphery of the panel. Flow of temperature control fluid to and from the heat exchanger is regulated by a control valve which is controlled by an engine computer unit in accordance with a set of predetermined values which define a curve that is a function of engine oil temperature and ambient air temperature.
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