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Electronic compensation system

  • US 6,186,117 B1
  • Filed: 10/09/1997
  • Issued: 02/13/2001
  • Est. Priority Date: 10/09/1996
  • Status: Expired due to Term
First Claim
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1. A method for adjusting the air/fuel mixture ratio for an engine during a cold start, comprising:

  • (a) supplying fuel from a float chamber to a venturi of a caburetor to be mixed with air and delivered to said engine;

    (b) generating a flow of pressurized air from pressure fluctuations within a crankcase of said engine;

    (c) supplying said flow to a control unit by a connecting line;

    (d) sensing the temperature of the engine and generating a signal when said temperature is below a normal operating temperature range;

    (e) supplying said signal to said control unit; and

    (f) utilizing said flow to elevate the pressure within said float chamber to increase fuel flow into the venturi and thus increase the fuel content of said mixture during periods when said signal is received;

    wherein said communication line delivers a flow of pressurized air at low speeds of rotation of the engine corresponding to cranking thereof, and wherein a mechanical pump, driven by pressure pulses generated in the crankcase chamber of the engine delivers the flow of pressurized air at speeds corresponding to idling and higher engine speeds.

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