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Device and method for decreasing delays in fuel injected internal combustion engines

  • US 5,137,000 A
  • Filed: 03/29/1991
  • Issued: 08/11/1992
  • Est. Priority Date: 03/29/1991
  • Status: Expired due to Term
First Claim
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1. A fuel injection controller for use with a fuel injected multi-cylinder internal combustion engine, said fuel injection controller comprising:

  • throttle means for producing a throttle signal corresponding to a desired engine power output level;

    means for sensing engine position and producing a position signal corresponding with engine camshaft rotational position;

    means for sensing engine coolant temperature and producing a temperature signal in response thereto;

    means for sensing air pressure of the intake manifold of the engine and producing a pressrue signal in response thereto;

    means for supplying fuel to the cylinders of the engine;

    said means for supplying including a plurality of fuel signal inputs each corresponding to a cylinder of the engine, said means for supplying responding to signals supplied to said fuel signal inputs and metering fuel to corresponding cylinders of the engine;

    circuit means responsive to said throttle signal, said temperature signal, and pressure signal and said engine position signal and producing a fueling signal for each power stroke of each cylinder of the engine, said fueling signals supplied to corresponding one fo said fuel signal inputs;

    wherein said circuit means is a microcomputer including RAM, ROM, analog to digital converter means and digital I/O, and wherein said microcomputer calculates a duration time interval corresponding to said fueling signals in accordance with said temperature signal, said pressure signal, and said throttle signal and wherein said microcomputer repeatedly calculates said duration time before the expiration of each of said fueling signals so that the duration of each of said fueling signals is altered immediately in accordance with changes in said temperature signal, said pressure signal, and said throttle signal when neccessary.

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