JP2011236809A - Engine generator starting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine generator starting method capable of executing the re-starting processing in a normal state even when an electronic control device detects an abnormality by noise or the like.SOLUTION: After an electronic control device is in an operating state by the input of an external signal to start an engine, the cranking for starting the engine is executed. When the engine is not started by the ranking, the electronic control device is set in a non-operating state. After the electronic control device is again set to be in an operating state, the re-starting processing for executing the cranking again is performed.

Description

  The present invention relates to an engine generator starting method, and more particularly, to an engine generator starting method including an automatic starting device that automatically starts an engine that drives the generator with an external signal.

  Engine generators that generate power by driving a generator with an engine are often used as emergency power supplies in the event of a commercial power failure, and automatically start the engine in response to an engine start signal during a commercial power failure. It is set to start power generation. The operation for starting the engine is performed by turning on the control power, operating the starter to crank the engine, and completing the cranking after starting the engine. The control device adjusts the engine speed to a predetermined value (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 3-54400

  If the engine could not be started due to cranking, for a vehicle engine such as a general automobile, the start process is repeated at the discretion of the driver or other person, or the power supply (key switch) is turned off and the start process is performed after a while. If there is no problem with the engine itself, such as resuming the engine, and there is no problem with the battery, fuel, etc., it is possible to artificially perform a restart process to start the engine.

  On the other hand, in an engine generator that is operated unattended, if the engine cannot be started at the first cranking, a restart process that automatically repeats cranking after a predetermined time has elapsed is performed to start the engine. ing. In this restart process, if the cause of the failure to start the engine at the first cranking is a simple mechanical malfunction such as a starter disengagement, start the engine by repeating the restart process. Can do.

  In recent years, even in an engine used for an engine generator, an electronic control method using an electronic control device has been adopted in response to exhaust gas regulations. Engines that use electronic control systems have advanced engine control and perform various types of sensing. When the electronic control unit detects an abnormality in the engine, it performs control such as stopping the engine or making it impossible to start. Yes. However, if the electronic control unit malfunctions due to the influence of noise such as abnormal electromagnetic waves from the outside and becomes in the same state as the state where the engine abnormality is detected, restart processing cannot be performed, Even if the starting process is repeated, the engine may not be started.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for starting an engine generator that can perform a restart process in a normal state even when the electronic control device detects an abnormality due to noise or the like. .

  In order to achieve the above object, an engine generator start method according to the present invention includes an automatic start device that automatically starts an engine that drives the generator by an external signal, and an electronic control device that controls the engine. In the method of starting the generator, the automatic starter performs cranking for starting the engine after the electronic control unit is activated by inputting an external signal for starting the engine. When the engine is not started, the electronic control device is deactivated and the electronic control device is activated again, and then restart processing is performed to perform cranking again.

  Furthermore, the engine generator start method of the present invention outputs an error signal and ends the restart process when the engine does not start even if the restart process is repeated a preset number of times. When the engine is not started by cranking due to the error detection of the electronic control unit, the error content detected by the electronic control unit is checked, and the restart is performed when the error content cannot be generated when the engine is started. It is characterized by performing processing. Also, if the electronic control unit does not detect an error during the start process, it is determined that there is a start-up jam if it cannot be started with a preset number of normal restarts, but the electronic control unit detects an error. In some cases, the number of restarts is made larger than the normal number of restarts.

  According to the engine generator start method of the present invention, when the electronic control device has detected an abnormality due to noise, the electronic control device is deactivated and reset to detect abnormality due to noise. The state can be canceled and the electronic control unit can be returned to the normal state. Thereby, since the electronic control unit can perform the restart process in a normal state, the reliability of the automatic starter can be improved.

  Further, by repeating the restart process only when there is an error content that cannot occur at the time of starting the engine, it is possible to eliminate repeating unnecessary operations. Conversely, in the case of error details that can occur when the engine is started, unnecessary battery consumption can be prevented by terminating the cranking before a predetermined cranking time elapses, and the electronic control unit generates an error during the starting process. The probability that the engine can be started can be increased by increasing the number of restarts when an error is detected than the number of restarts when it is not detected.

It is explanatory drawing which shows a state when an engine starts by the cranking of the 3rd time in the starting method of the engine generator of this invention. It is explanatory drawing which shows a state when an engine cannot be started even if the restart process is repeated twice in the starting method of the engine generator of this invention. It is explanatory drawing which shows a state when an engine starts by the first cranking in the starting method of the engine generator of this invention.

  The starting method of the engine generator shown in this embodiment is a procedure for starting the diesel engine of the engine generator that drives the generator by the diesel engine controlled by the electronic control device by the automatic starting device. 1 to 3 show the ON / OFF state of each circuit, and the lower base line indicates the OFF state and the upper line indicates the ON state. Further, since various electronic control devices that are normally used can be used for the electronic control device, detailed description thereof is omitted.

  As shown in FIG. 1 to FIG. 3, the start operation of the diesel engine is performed by turning on the control power circuit in response to the input (ON) of an external signal (operation command) for starting the engine, and supplying power to the electronic control unit (ECU). The ECU control power supply circuit to be supplied is turned on and the electronic control device is activated, and various sensors and other pilot lamps and meters are activated. The remaining heat circuit is turned on and preheated by a heater or glow plug. Is done. After preheating is performed for a predetermined time or until a predetermined temperature is reached, the start circuit is turned on simultaneously with the remaining heat circuit being turned off, and the starter is operated to crank the engine.

  As shown in FIG. 3, when the engine starts in the first cranking for the first time, the power generation state of the generator is detected, the operation signal is turned on, the start circuit is turned off, and the signals from various sensors are used. By operating the electronic control unit, the fuel injection amount and the like are controlled, and the engine is operated at a rated speed of a predetermined number of revolutions, for example, 1500 revolutions per minute or 1800 revolutions per minute, from a generator driven by the engine. A constant voltage, constant frequency power supply is supplied to the load.

  When the operation command is turned off and the operation is stopped, the control power circuit and the ECU control power circuit are kept on for a predetermined time after the operation command is turned off. And the ECU control power supply circuit is turned off, the engine is stopped, and the operation signal is also turned off. In this way, when the engine is started at the first cranking, the start congestion circuit that outputs an error signal indicating that the engine has failed to start remains OFF, and the ECU reset for performing the restart process The command remains OFF.

  FIG. 1 shows a state in which the engine can be started by the third cranking. Similarly to the above, when the operation command is turned on, the control power circuit, ECU control power circuit and preheating circuit are turned on, respectively. After preheating, the starting circuit is turned on and the first cranking is performed for several seconds.

  If the engine cannot be started by this first cranking, the operation signal is OFF because the operation state of the engine is not detected even though the operation command, control power supply circuit, and ECU control power supply circuit are ON. Therefore, restart processing is performed. In this restart process, the start circuit is turned off to enter a rest state, the ECU reset command is turned on, the ECU reset command turns the ECU control power circuit off, the power to the electronic control device is shut off, and the electronic control device Is deactivated for a few seconds and the electronic control unit is reset. At the same time, the preheating circuit is turned on and preheating is performed again.

  After the preheating is completed, the preheating circuit is turned off and the starting circuit is turned on, and the second cranking is performed. If the engine cannot be started even by the second cranking, a second restart process is performed. In the second restart process, as in the first restart process, first, the start circuit is turned off to enter a halt state, the ECU reset command is turned on, the ECU control power circuit is turned off, and the electronic control is turned off. Reset the control unit. In addition, after the preheating circuit is turned on and preheating is performed again, the preheating circuit is turned off and the starting circuit is turned on, and the third cranking is performed by the second restart process.

  When the engine is started in the third cranking, the engine operating state is detected and the operation signal is turned on and the start circuit is turned off, and the electronic control unit is turned on in response to signals from various sensors. Controls the operating state of the engine. In this case as well, the starting congestion circuit remains OFF.

  On the other hand, if the number of restart processes is set to a maximum of 2 in advance and the engine fails to start in the third cranking, the start congestion circuit is turned on as shown in FIG. An error signal indicating failure has been output to a preset output destination. Note that the operation command, the control power supply circuit, and the ECU control power supply circuit continue to output the error signal by continuing the ON state until the confirmation processing at the error signal output destination is performed.

  In this way, even if the electronic control unit malfunctions due to noise from the surroundings of the place where the engine generator is installed, and the engine is in a control state in which the engine is stopped or in a control state in which the start is prohibited, By resetting the electronic control unit temporarily to the non-operating state when the starting of the electronic control unit fails, the electronic control unit can be returned to the normal operating state when there is no noise that causes the electronic control unit to malfunction. The engine can be started by the restart process.

  Although not shown in the figure, the error content of the electronic control unit is confirmed when the engine cannot be started by cranking, and restart processing is performed when the error content cannot be generated when the engine is started. In the case of error contents that may occur at the time of engine start, for example, when a disconnection of wiring is detected, the setting is made so that the restart process is not performed, so that adverse effects on each part of the engine can be reduced.

  The operation for resetting the electronic control unit to the non-operating state is to use the reset command when the operation command, the control power circuit and the ECU control power circuit are ON, and the residual heat circuit, the start circuit and the operation signal are OFF. Instead, the process of temporarily turning off the switch provided in the ECU control power circuit may be performed. Conversely, while the switch of the ECU control power circuit is kept on, the internal process of the electronic control device is performed by the reset command. Thus, it may be only the process of returning to the operating state after temporarily setting the same state as the non-operating state, and can be selected according to the configuration of the electronic control unit.

Claims (3)

  An engine generator starting method comprising: an automatic starting device that automatically starts an engine that drives a generator with an external signal; and an electronic control device that controls the engine, wherein the automatic starting device is an external device that starts the engine. After the electronic control device is activated by a signal input, cranking is performed to start the engine. When the engine is not started by the cranking, the electronic control device is deactivated and then restarted. A starting method for an engine generator, characterized in that after the electronic control device is put into an operating state, restart processing is performed for cranking again.   2. The engine generator start method according to claim 1, wherein if the engine is not started even if the restart process is repeated a preset number of times, an error signal is output and the restart process is terminated. .   When the engine does not start due to cranking, the error content detected by the electronic control unit is confirmed, and the restart process is performed when the error content cannot be generated when the engine is started. The starting method of the engine generator according to claim 1 or 2.

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