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

Claim 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.

Claim 3

A device for controlling fuel injection in connection with a mulit-cylinder internal combustion engine, said device comprising: temperature sensor means for producing a temperature signal corresponding to coolant temperature of the engine; pressure sensor means for producing a pressure signal corresponding to intake manifold air pressure of the engine; accelerator sensor means for producing a power signal corresponding to power output desired from the engine in response to actuation of said accelerator sensor means by an operator of the engine; means for sensing engine position and producing a position signal corresponding to engine camshaft rotational position; means for sensing engine speed and producing a speed signal in accordance therewith; a plurality of fuel injectors corresponding one for one with the cylinders of the engine, wherein each of said fuel injectors includes a fueling input and wherein said fuel injectors supply fuel to the corresponding cylinders of the engine in accordance with the duration of signals supplied to said fueling inputs; a microcomputer including analog to digital converter means for inputting analog signals, digital I/O, ROM and RAM, said microcomputer being responsive to said power signal, said position signal, said temperature signal, said pressure signal and said speed signal, said microcomputer producing a plurality of fueling signals and supplying one of said plurality of fueling signals to a corresponding one of said fueling inputs of said plurality of fuel injectors prior to each power stroke of the corresponding cylinder of the engine, said microcomputer responding to changes in said power signal, said temperature signal, said pressure signal and said speed signal to shorten or lengthen the duration of each of said plurality of fueling signals accordingly before the expiration of each of said plurality of fueling signals; wherein said microcomputer includes a fuel map in ROM for determining the appropriate duration for each of said plurality of fueling signals in response to said power signal, said temperature signal, said pressure signal, and said speed signal.

Claim 4

A device for controlling fuel injection in connection with a mulit-cylinder internal combustion engine, said device comprising: temperature sensor means for producing a temperature signal corresponding to coolant temperature of the engine; pressure sensor means for producing a pressure signal corresponding to intake manifold air pressure of the engine; accelerator sensor means for producing a power signal corresponding to power output desired from the engine in response to actuation of said accelerator sensor means by an operator of the engine; means for sensing engine position and producing a position signal corresponding to engine camshaft rotational position; means for sensing engine speed and producing a speed signal in accordance therewith; a plurality of fuel injectors corresponding one for one with the cylinders of the engine, wherein each of said fuel injectors includes a fueling input and wherein said fuel injectors supply fuel to the corresponding cylinders of the engine in accordance with the duration of signals supplied to said fueling inputs; a microcomputer including analog to digital converter means for inputting analog signals, digital I/O, ROM and RAM, said microcomputer being responsive to said power signal, said position signal, said temperature signal, said pressure signal and said speed signal, said microcomputer producing a plurality of fueling signals and supplying one of said plurality of fueling signals to a corresponding one of said fueling inputs of said plurality of fuel injectors prior to each power stroke of the corresponding cylinder of the engine, said microcomputer responding to changes in said power signal, said temperature signal, said pressure signal and said speed signal to shorten or lengthen the duration of each of said plurality of fueling signals accordingly before the expiration of each of said plurality of fueling signals; wherein said microcomputer includes a fuel map in ROM for determining the appropriate duration for each of said plurality of fueling signals in response to said power signal, said temperature signal, said pressure signal, and said speed signal.

Claim 10

A method of controlling the supply of fuel to an internal combustion engine comprising the steps of: (1) receiving a fueling request; (2) determining a fueling requirement based upon said fueling request; (3) producing a fueling signal for each power stroke of the engine in accordance with said fueling requirement; (4) continuously repeating steps (1) and (2) and altering the duration of said fueling signal before the expiration thereof.

Claim 11

A method of controlling the supply of fuel to an internal combustion engine comprising the steps of: (1) receiving a fueling request; (2) determining a fueling requirement based upon said fueling request; (3) producing a fueling signal for each power stroke of the engine in accordance with said fueling requirement; (4) continuously repeating steps (1) and (2) and altering the duration of said fueling signal before the expiration thereof.

Claim 15

A device for controlling fuel injection in connection with a multi-cylinder internal combustion engine, said device comprising: accelerator sensor means for producing a power signal corresponding to power output desired from the engine in response to actuation of said accelerator sensor means by an operator of the engine; means for sensing engine position and producing a position signal corresponding to engine camshaft rotational position; a plurality of fuel injectors corresponding one for one with the cylinders of the engine, wherein each of said fuel injectors includes a fueling input and wherein said fuel injectors supply fuel to the corresponding cylinders of the engine in accordance with the duration of signals supplied to said fueling inputs; controller means responsive to said power signal and said position signal for supplying signals to each of said fueling inputs of said plurality of fuel injectors, said controller means producing a plurality of fueling signals and supplying one of said plurality of fueling signals to a corresponding one of said plurality of fuel injectors prior to each power stroke of the corresponding cylinder of the engine, said controller means responding to changes in said power signal to shorten or lengthen the duration of each of said plurality of fueling signals accordingly before the expiration of each of said plurality of fueling signals.

Claim 16

A device for controlling fuel injection in connection with a multi-cylinder internal combustion engine, said device comprising: accelerator sensor means for producing a power signal corresponding to power output desired from the engine in response to actuation of said accelerator sensor means by an operator of the engine; means for sensing engine position and producing a position signal corresponding to engine camshaft rotational position; a plurality of fuel injectors corresponding one for one with the cylinders of the engine, wherein each of said fuel injectors includes a fueling input and wherein said fuel injectors supply fuel to the corresponding cylinders of the engine in accordance with the duration of signals supplied to said fueling inputs; controller means responsive to said power signal and said position signal for supplying signals to each of said fueling inputs of said plurality of fuel injectors, said controller means producing a plurality of fueling signals and supplying one of said plurality of fueling signals to a corresponding one of said plurality of fuel injectors prior to each power stroke of the corresponding cylinder of the engine, said controller means responding to changes in said power signal to shorten or lengthen the duration of each of said plurality of fueling signals accordingly before the expiration of each of said plurality of fueling signals.