Electronic fuel injection control device

• US 7,905,217 B2
• Filed: 08/02/2006
• Issued: 03/15/2011
• Est. Priority Date: 08/05/2005
• Status: Expired due to Fees

• Current Assignee: Keihin Corporation (Hitachi, Ltd.)
• Original Assignee: Keihin Corporation (Hitachi, Ltd.)
• Inventors: Namari, Takashi, Ono, Masato
• Primary Examiner(s): Cronin; Stephen K
• Assistant Examiner(s): VILAKAZI, SIZO BINDA
• Application Number:
  US11/497,314
• Publication Number:
  US 20070028898A1
• Time in Patent Office: 1,686 Days
• Field of Search: 123/491, 123/478, 123/406.47, 123/406.53, 123/497, 123/179.17, 123/490
• US Class Current: 123/491
• CPC Class Codes: F02D 41/062 for starting F02D41/061 takes precedence
• CPC Class Codes: F02N 3/04 having foot-actuated levers

Abstract

An electronic fuel injection control device of the present invention has at least a fuel injection device for injecting a fuel devoted to a combustion, and a power source circuit for rectifying and stabilizing an alternating-current voltage generated, based on a rotation of a crank shaft; controls the fuel injection device in an internal combustion engine started by rotating the crank shaft through a manual operation; and further has a power source voltage detection mechanism for detecting a value of a power source voltage supplied to the injection device by the circuit, and an Information processing mechanism for starting an operation when receiving a supply of a direct-current voltage from the circuit, initializing itself, inputting a power source voltage value detected by the detection mechanism, and instructing a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value.

Claims

1. An electronic fuel injection control device for an internal combustion engine in which no battery is mounted and that includes a fuel injection device for injecting a fuel devoted to combustion, and a power source circuit for rectifying and stabilizing an alternating current voltage generated by a power source comprising a generator, based on a rotation of a crank shaft of the internal combustion engine being started by rotating the crank shaft through a manual operation, whereby electrical generation power is by manual operation during a period when the power source voltage rises;

the electronic fuel injection control device comprising;

a power source voltage detector configured to detect a value of a power source voltage supplied to the fuel injection device by the power source circuit; and

an information processor programmed to perform first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit;

to initialize itself inputting the power source voltage value detected by the power source voltage detection mechanism; and

to instruct a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value;

wherein the information processor comprises means for performing first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit;

means for initializing itself inputting the power source voltage value detected by the power source voltage detection mechanism; and

means for instructing a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value;

means for, when finishing own initialization, outputting from the information processor an ON signal for instruction ON of a power source of the fuel pump;

means for, when finishing the first fuel injection processing, outputting from the mechanism an OFF signal comprising means for instructing OFF of the power source of the fuel pump; and

means for, when finishing first ignition processing, outputting from the mechanism the ON signal for instructing ON of the power source of the fuel pump.

2. An electronic fuel injection control device for an internal combustion engine in which no battery is mounted and that includes a fuel injection device for injecting a fuel devoted to combustion, and a power source circuit for rectifying and stabilizing an alternating current voltage generated by a power source comprising a generator, based on a rotation of a crank shaft of the internal combustion engine being started by rotating the crank shaft through a manual operation, whereby electrical generation power is by manual operation during a period when the power source voltage rises;

the electronic fuel injection control device comprising;

a power source voltage detector configured to detect a value of a power source voltage supplied to the fuel injection device by the power source circuit; and

an information processor programmed to perform first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit;

to initialize itself inputting the power source voltage value detected by the power source voltage detection mechanism; and

to instruct a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value;

wherein the information processor comprises means for performing first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit;

means for initializing itself inputting the power source voltage value detected by the power source voltage detection mechanism; and

means for instructing a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value;

means for performing ignition processing of instructing to perform a first ignition for an igniter of the internal combustion engine, means for the information processor performing stroke discrimination processing with respect to the internal combustion engine in advance of the ignition processing; and

means for, when the stroke discrimination processing is enabled, the mechanism performing the ignition processing, and means for following fuel injection processing according to normal fuel injection processing;

said first fuel injection processing of starting an operation occurring at the initial start of the internal combustion engine;

means for performing ignition processing of instructing to perform a first ignition for an igniter of the internal combustion engine, means for the information processor performing stroke discrimination processing with respect to the internal combustion engine in advance of the ignition processing; and

means for, when the stroke discrimination processing is enabled, the mechanism performing the ignition processing, and means for following fuel injection processing according to normal fuel injection processing;

means for, when finishing own initialization, outputting from the information processor an ON signal for instruction ON of a power source of the fuel pump;

means for, when finishing the first fuel injection processing, outputting from the mechanism an OFF signal comprising means for instructing OFF of the power source of the fuel pump; and

means for, when finishing first ignition processing, outputting from the mechanism the ON signal for instructing ON of the power source of the fuel pump.

3. An electronic fuel injection control device for an internal combustion engine in which no battery is mounted and that includes a fuel injection device for injecting a fuel devoted to combustion, and a power source circuit for rectifying and stabilizing an alternating current voltage generated by a power source comprising a generator, based on a rotation of a crank shaft of the internal combustion engine being started by rotating the crank shaft through a manual operation, whereby electrical generation power is by manual operation during a period when the power source voltage rises;

the electronic fuel injection control device comprising;

a power source voltage detector configured to detect a value of a power source voltage supplied to the fuel injection device by the power source circuit; and

an information processor programmed to perform first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit to initialize itself inputting the power source voltage value detected by the power source voltage detection mechanism; and

to instruct a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value;

wherein the information processor comprises means for performing first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit;

means for initializing itself inputting the power source voltage value detected by the power source voltage detection mechanism; and

means for instructing a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value;

a first fuel injection standard time memory mechanism, coupled to the processor, including means for making a first fuel injection standard time correspond respectively to every value of the power source voltage; and

means for memorizing the first fuel injection standard time, which the first fuel injection standard time is set in advance with means for considering a response time until starting a fuel injection and a fuel pressure of a fuel pump that supplies a fuel to the fuel injection control device when the fuel injection device receives a fuel injection instruction signal, and

means for in the first fuel injection processing the information processor referring to the memory mechanism and deriving the first fuel injection standard time, based on the power source voltage value detected by the power source voltage detection mechanism;

mean for performing a compensation computation defined in advance according to an engine temperature input from a temperature sensor that detects a temperature of the internal combustion engine for the derived first fuel injection standard time; and

means for outputting a signal comprising means for instructing a fuel injection to the fuel injection device, comprising means for making the obtained value by the computation a fuel injection time of the first fuel injection,

said first fuel injection processing of starting an operation occurring at the initial start of the internal combustion engine;

means for, when finishing own initialization, outputting from the information processor an ON signal for instruction ON of a power source of the fuel pump;

means for, when finishing the first fuel injection processing, outputting from the mechanism an OFF signal comprising means for instructing OFF of the power source of the fuel pump; and

means for, when finishing first ignition processing, outputting from the mechanism the ON signal for instructing ON of the power source of the fuel pump.

4. An electronic fuel injection control device for an internal combustion engine in which no battery is mounted and that includes a fuel injection device for injecting a fuel devoted to combustion, and a power source circuit for rectifying and stabilizing an alternating current voltage generated by a power source comprising a generator, based on a rotation of a crank shaft of the internal combustion engine being started by rotating the crank shaft through a manual operation, whereby electrical generation power is by manual operation during a period when the power source voltage rises;

the electronic fuel injection control device comprising;

a power source voltage detector configured to detect a value of a power source voltage supplied to the fuel injection device by the power source circuit; and

an information processor programmed to perform first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit;

to initialize itself inputting the power source voltage value detected by the power source voltage detection mechanism; and

to instruct a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value;

wherein the information processor comprises means for performing first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit;

means for initializing itself inputting the power source voltage value detected by the power source voltage detection mechanism; and

means for instructing a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value;

a first fuel injection standard time memory mechanism, coupled to the processor, including means for making a first fuel injection standard time correspond respectively to every value of the power source voltage; and

means for memorizing the first fuel injection standard time, which the first fuel injection standard time is set in advance with means for considering a response time until starting a fuel injection and a fuel pressure of a fuel pump that supplies a fuel to the fuel injection control device when the fuel injection device receives a fuel injection instruction signal, and

means for in the first fuel injection processing the information processor referring to the memory mechanism and deriving the first fuel injection standard time, based on the power source voltage value detected by the power source voltage detection mechanism;

mean for performing a compensation computation defined in advance according to an engine temperature input from a temperature sensor that detects a temperature of the internal combustion engine for the derived first fuel injection standard time; and

means for outputting a signal comprising means for instructing a fuel injection to the fuel injection device, comprising means for making the obtained value by the computation a fuel injection time of the first fuel injection,

said first fuel injection processing of starting an operation occurring at the initial start of the internal combustion engine;

means for performing ignition processing of instructing to perform a first ignition for an igniter of the internal combustion engine, means for the information processor performing stroke discrimination processing with respect to the internal combustion engine in advance of the ignition processing; and

means for, when the stroke discrimination processing is enabled, the mechanism performing the ignition processing, and means for following fuel injection processing according to normal fuel injection processing;

means for, when finishing own initialization, outputting from the information processor an ON signal for instruction ON of a power source of the fuel pump;

means for, when finishing the first fuel injection processing, outputting from the mechanism an OFF signal comprising means for instructing OFF of the power source of the fuel pump; and

means for, when finishing first ignition processing, outputting from the mechanism the ON signal for instructing ON of the power source of the fuel pump.

5. A method of controlling fuel injection in an internal combustion engine in which no battery is mounted and that includes a fuel injection device for injecting a fuel devoted to combustion, and a power source circuit for rectifying and stabilizing an alternating current voltage generated by a power source comprising a generator, based on a rotation of a crank shaft of the internal combustion engine being started by rotating the crank shaft through a manual operation, whereby electrical generation power is by manual operation during a period when the power source voltage rises;

the method comprising;

configuring a power source voltage detector to detect a value of a power source voltage supplied to the fuel injection device by the power source circuit; and

configuring an information processor to perform first fuel injection processing of a starting operation when receiving a supply of a direct current voltage from the power source circuit;

initializing the power source voltage value detected by the power source voltage detection mechanism;

instructing a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value; and

when finishing own initialization, outputting from the information processor an ON signal for instruction ON of a power source of the fuel pump;

outputting from the mechanism, when finishing the first fuel injection processing, an OFF signal for instructing OFF of the power source of the fuel pump; and

when finishing first ignition processing, outputting from the mechanism the ON signal for instructing ON of the power source of the fuel pump.