Kokusan Denki Co., Ltd.

Yuichi Kitagawa

Kazuyoshi Kishibata

Hiroyasu Sato

Tomoaki Sekita

Akira Shimoyama

A fuel injection and ignition control method including the steps of: calculating a total injection amount correction value at the restart of fuel injection by adding an injection amount correction value determined with respect to a fuel cut period and an engine operating state to an injection amount increase correction value in acceleration when an engine accelerating operation is performed in a state where fuel cut is performed and the engine is operated; determining an injection restart time ignition timing delay amount with respect to the total injection amount correction value and a throttle valve opening degree; and performing fuel injection control to increase a fuel injection amount to be higher than a fuel injection amount in normal time by the total injection amount correction value, and ignition control to delay ignition timing from ignition timing in normal operation by the injection restart time ignition timing delay amount.

Fuel injection and ignition control method and fuel injection and ignition control device of engine

A control device for controlling an engine driven vehicle that drives a generator by an engine to supply power to an external load when the vehicle is stopped, including: rotational speed limiting means for controlling to limit a rotational speed of the engine to a limit rotational speed or lower corresponding to an upper limit value accepted while driving when the vehicle is driven, and to limit the rotational speed of the engine to a limit rotational speed or lower corresponding to a rotational speed slightly higher than an upper limit value of the rotational speed required for supplying power from the generator to the external load when the vehicle is stopped to supply power from the generator to the external load.

Control device for engine driven vehicle incorporating generator

An engine fuel injection control device including: means for detecting an amount of change per minimal time in intake pipe pressure of an engine as an intake pipe pressure change amount; means for performing an arithmetical operation of calculating an opening area of an orifice from a relationship between a mass flow rate of gas and the intake pipe pressure change amount in a process for the intake pipe pressure to increase after an intake valve of the engine is closed, the gas flowing through said orifice by a difference in pressure on both sides of the orifice when a throttle valve is regarded as the orifice; and means for estimating the opening area of the orifice as an opening area of the throttle valve to arithmetically operate an acceleration increase correction value of injection time based on the estimated opening area; and means for correcting an injection amount in acceleration of the engine using the arithmetically operated acceleration increase correction value.

Engine throttle opening degree area estimation method, as well as engine acceleration detection method and device and engine fuel injection control method and device using the estimation method

An engine driven vehicle having a function of supplying power to an external load from a generator driven by an engine that is operated in a power generation mode while the vehicle is stopped, including: throttle position determination means for determining whether a throttle valve is placed closer to an acceleration side than a normal position in the power generation mode while the engine is operated in the power generation mode; and safety engine control means for conducting a control to prevent the engine from being operated at a higher speed than a set speed limit when the determination means determines that the throttle valve is placed closer to the acceleration side than the normal position in the power generation mode.

An engine rotation information detection device including: a generator that rotates in synchronization with an engine to output an AC voltage; a pulse signal generator that detects reluctors of a rotor having many reluctors and one reluctor missing portion to generate a pulse; counting means that counts the number of detections of a zero point of a waveform of the AC voltage in each detection section, the detection section being a section between a crank angle position where the pulse signal generator detects an edge of each reluctor and a crank angle position where the pulse signal generator detects a next reluctor; and reference crank angle position identification means that specifies a detection section including the reluctor missing portion from a count value counted by the counting means and identifies a pulse generated at a reference crank angle position based on the specified detection section.

Engine rotation information detection device

A fuel injection control system for an engine comprising: accelerating/decelerating state detection means which samples an intake pipe pressure of the engine at each sample timing which comes every time a very short time is passed from a timing at which a signal generator generates a signal at a reference crank angle position of the engine, and detects whether the engine is in an accelerating state or in a decelerating state when a difference between the intake pipe pressure sampled at each sample timing and an intake pipe pressure sampled at the corresponding sample timing one combustion cycle before exceeds a set value; and injector drive means which decides a fuel amount to be injected from an injector so as to be suitable for the detected state when the accelerating state or decelerating state is detected and drives the injector so as to inject the decided amount of fuel.

Fuel injection control system for engine

A transmission state determination method of a power transmission device for an internal combustion engine driven vehicle including steps of: driving a generator by an internal combustion engine with a vehicle driven by the internal combustion engine stopped; performing an intake air amount gradually increasing process for gradually increasing the intake air amount of the internal combustion engine when the internal combustion engine is controlled so as to generate predetermined power from the generator; determining that the power transmission device for transmitting the output of the internal combustion engine to wheels of the vehicle is in a state of transmitting power when slight movement of a vehicle body is detected in the intake air amount gradually increasing process; and determining that the power transmission device is in a state of cutting power transmission when movement of the vehicle body is not detected in the intake air amount gradually increasing process.

Method and device for determining transmission state of power transmission device for internal combustion engine driven vehicle

An electronic control system for an internal combustion engine comprising a controller having a fuel injection control section to control an injector of a fuel injection unit to supply fuel to the engine and an electric power source section to apply a driving power from a generator driven by the engine to the fuel injection unit and the controller, the controller having a first injection command generation section to generate an injection command when an output voltage of the generator reaches a set value whereby a first fuel injection at a start of the engine is made when the first fuel injection command generation section generates the injection command.

Electronic control system for engine

A vehicle driven by an internal combustion engine incorporating a power supply unit and including a power transmission on/off determination device that gradually opens a throttle valve of the engine to gradually increase a rotational speed of the engine, detects, as a determination value that reflects a load applied on the internal combustion engine when the speed of the engine increases to a power transmission start rotational speed, and then the throttle valve is further opened by a set angle, determines that the power transmission device is in a state of cutting the power transmission when it is determined from the determination value that the engine load is less than a preset magnitude, and determines that the power transmission device is in a state of performing the power transmission when it is determined from the determination value that the engine load is equal to or more than the preset magnitude.

Vehicle driven by internal combustion engine having generator

A fuel cut control device that stops supply of fuel to an internal combustion engine during deceleration of the internal combustion engine having a throttle valve for each cylinder, which detects a maximum value of an intake pipe pressure during one combustion cycle of the internal combustion engine, starts fuel cut control when it is detected that the detected maximum value of the intake pipe pressure becomes less than a set fuel cut start determination value, and stop the fuel cut control when it is detected that the detected maximum value of the intake pipe pressure exceeds a fuel supply restart determination value set higher than the fuel cut start determination value to restart the supply of the fuel to the internal combustion engine.

Fuel cut control device for internal combustion engine

A fuel injection and ignition system for an internal combustion engine adapted to apply a power source voltage to an injector, an ignition circuit, an electronic control unit and a fuel pump from a single voltage regulating power source circuit having as a power source a generator driven by the internal combustion engine through a power line and to control a drive current of the fuel pump in a pulse width modulating mode (PWM mode) so as to keep the power line voltage at a value higher than a reference voltage, which is set slightly higher than a voltage corresponding to one higher among the minimum operation voltages for the injector and that for the ignition circuit, in the course where the internal combustion engine starts.

Fuel injection and ignition system for internal combustion engine

An atmospheric pressure detecting method for controlling an internal combustion engine, which can detect atmospheric pressure and takes the atmospheric pressure as one of control conditions of the internal combustion engine without using a throttle sensor and an atmospheric pressure sensor, is provided; wherein a maximum value and a minimum value of intake pipe pressure generating while the internal combustion engine performs one combustion cycle are detected; wherein an absolute value of a difference between the maximum value and the minimum value of the intake pipe pressure is detected as an intake pipe pressure change quantity; and wherein the maximum value of the intake pipe pressure is taken as a detection value of atmospheric pressure when the intake pipe pressure change quantity is equal to or less than a set value.

Atmospheric pressure detecting method for controlling internal combustion engine and apparatus therefor

An electronic fuel injection control apparatus for an internal combustion engine, which is used for controlling a quantity of fuel injected from an injector into an intake pipe of the internal combustion engine, includes a microcomputer which performs an arithmetical operation for determining a pressure within the above described intake pipe based on a throttle valve opening degree and a rotational speed, an arithmetical operation for determining a variation relative to an arithmetically operated reference value of the intake pipe pressure, an arithmetical operation for determining a correction coefficient used for correcting an injection time when this variation exceeds a set value, and an arithmetical operation for determining an actual injection time by multiplying a basic injection time by the correction coefficient arithmetically operated immediately before a timing where the fuel is injected, and controls the injector such that the fuel is injected during the arithmetically operated injection time.

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Numazu, Japan

Yuichi Kitagawa