Cold start fuel enrichment circuit

Details Cold start fuel enrichment circuit Cold start fuel enrichment circuit

1987-06-09

1988-08-16

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

123479, 123179G, F02D 4106, F02D 4114

Patent

active

047636254

ABSTRACT:
A cold start fuel enrichment circuit for an internal combustion engine includes a thermistor (204) sensing engine temperature, a voltage source (V.sub.DD) continually biasing the thermistor such that the voltage across the thermistor continually varies with engine temperature and provides an output fuel enrichment signal, and a circuit (218, 220) connecting the engine battery (206) through the start switch (208) to the thermistor to additionally bias the thermistor during cranking of the engine. A combination cold start and knock prevention fuel enrichment circuit is also provided.

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