Increasing warm up enrichment as a function of manifold...

Details Increasing warm up enrichment as a function of manifold... Increasing warm up enrichment as a function of manifold...

G - Physics

05

D

341/38.14

G05D 7/06 (2006.01) F02D 41/06 (2006.01)

Patent

CA 1067179

INCREASING WARM UP ENRICHMENT AS A FUNCTION OF MANIFOLD ABSOLUTE PRESSURE ABSTRACT An electronic fuel control system for an internal combustion engine is disclosed capable of providing an enriched fuel/air mixture to the engine as a function of the engine's temperature and the engine's load during the transient warm up period. The fuel control unit embodies a full load warm up enrichment circuit controlling, in response to engine temperatures below a predetermined temperature and engine loads as determined from the pressure in the engine's intake manifold, the quantity of fuel being delivered to the engine. In the preferred embodiment-the full load warm up enrichment circuit is a current sink sinking a portion of the current charging the injection timing capacitor in the electronic control unit to increase the duration of the generated injection fuel delivery pulses.

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