Stopping solenoid of diesel engine

专利摘要:
The present invention relates to a stopping solenoid of a diesel engine which stops the engine by pulling an engine stop lever of a fuel pump or pulling a shutoff lever of an air damper installed at an air inlet of the engine, and constitutes a stop solenoid 4. The excitation / element control of the coil 46 is electrically processed by the circuit portions 41, 42, 43a, 43b, 44, and 45, and the power input line of the stop solenoid 4 is stopped and the operating power input line is stopped. Separated into the signal input line, since the diode 47 is connected in parallel to the coil 46 to form a closed circuit, the counter electromotive force is cut off, and the damage of the contact point for the stop signal is suppressed to improve the operation function.
公开号:KR20000046002A
申请号:KR1019980062662
申请日:1998-12-31
公开日:2000-07-25
发明作者:한찬석；김홍경；한재천
申请人:추호석；대우중공업 주식회사；
IPC主号:

专利说明:

Stop solenoid of diesel engine
The present invention relates to a stop solenoid for a diesel engine which stops the engine by pulling the engine stop lever of the fuel pump or pulling the shutoff lever of an air damper installed in the air inlet of the engine. The present invention relates to a stopping solenoid of a diesel engine in which an operation function is improved while damage to a signal contact is suppressed.
As is well known, the stopping solenoid of a diesel engine stops the diesel engine by pulling the engine stop lever of the fuel pump to stop the supply of fuel to the combustion chamber, or pulls the shutoff lever of the air damper installed in the air inlet to draw air into the combustion chamber. By stopping the inflow to stop the diesel engine, the stop solenoid 400 of the conventional diesel engine receives power from the stop signal contact 3 supplied through the limit switch 403, as shown in FIG. Pressed by a pulling coil 401 pulling a plunger (not shown), a holding coil 402 receiving power from the stop signal contact 3 to keep the plunger pulled out, and a plunger pulled to a restricted position. And a limit switch 403 that cuts off the power supply to the pulling coil 401.
When the operation of the stop solenoid 400 of the conventional diesel engine is described, when the stop signal contact 3 is turned on by the stop signal, the power of the battery 1 is transferred to the pulling coil 401 through the limit switch 403. While being supplied, power of the battery 1 flows into the holding coil 402 at the same time, so that the pulling coil 401 and the holding coil 402 are excited to draw the plunger. After the plunger is pulled to the limit position, the limit switch 403 is mechanically pressed by the tip of the plunger and is turned off, so that the power supply to the pulling coil 401 is cut off and the pulling coil 401 is demagnetized. Since the holding coil 401 maintains the excited state, the plunger maintains the pulled state up to the limit position.
On the other hand, when the plunger is pulled to the limit position, the engine stop lever of the fuel pump mechanically connected thereto or the shutoff lever of the air damper is pulled to stop the diesel engine.
However, in the stationary solenoid 400 according to the related art, since the pulling coil 401 and the holding coil 302 are disposed in parallel, the impedance values of the two coils 401 and 402 are relatively small. Since a large current flows through), the stop signal contact 3 has a disadvantage of requiring a large capacity.
In addition, since the counter electromotive force is generated in the pulling coil 401 when the limit switch 403 is turned off, adverse effects are applied to other equipment using the same power line as the stop solenoid, and furthermore, the installation position of the limit switch 403. If the error is not correct, the limit switch 5 repeats ON / OFF due to the vibration generated when the engine stops, so that a large current continues to flow through the pulling coil 401, so that the pulling coil 401 deteriorates and is damaged. As the counter electromotive force is repeatedly generated largely, the problem becomes more serious.
On the other hand, when the stop signal contact 3 is turned off after the diesel engine is stopped, the plunger is returned to its original state, so that the limit switch 403 is also returned to the original state and is turned on, while the plunger is held while the limit switch 403 is kept in the ON state. When returning to the original position, an arc is generated in the stop signal contact 3 by the generated counter electromotive force, which causes a problem that the stop signal contact 3 is damaged.
Accordingly, the present invention has been invented to solve the above problems, the object of the present invention is to provide a solenoid for stopping the diesel engine to be the reverse electromotive force is blocked, the operation function is improved while the damage of the stop signal contact is suppressed.
1 is a circuit diagram of a block treatment of a stop solenoid of a diesel engine according to the present invention;
2 is a circuit diagram of a solenoid for stopping a diesel engine according to the prior art.
One ; Battery, 2; fuse,
3; Contact for stop signal, 4; Stop solenoid,
41; Constant voltage circuit section 42; Timer circuit,
43a, 43b; Photo coupler, 44a; Gate driver,
45; Switching element, 46; coil,
47; diode.
The present invention for achieving the above object is, the coil connected to the power supply line, a constant voltage circuit unit for receiving and stabilizing the stop signal from the contact for the stop signal, the electrical signal by the stop signal from the constant voltage circuit unit in an electrically insulated state A photo coupler connected to the gate driver for outputting a stop signal to the gate driver, and a timer circuit unit for receiving a stop signal from the constant voltage circuit unit and outputting a stop signal to the photo coupler after a predetermined time has elapsed. The photocoupler is electrically connected by a stop signal from the timer circuit unit in an electrically insulated state and outputs a stop signal to the gate driver. Output gate It is a structure consisting of a switching element that is ON / OFF operation controlled by a driver and a gate driver to excite / deactivate the coil, and a diode arranged in parallel to the coil to form a closed circuit.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a circuit diagram of a block processing of a stop solenoid of a diesel engine according to the present invention, whereby the stop solenoid 4 according to the present invention comprises a coil 46 connected to a power supply line and a stop signal contact 2. A constant voltage circuit part 41 for receiving a stop signal of the input signal and stabilizing it, a photo coupler electrically connected by a stop signal from the constant voltage circuit part 41 in an electrically insulated state, and outputting a stop signal to the gate driver 44 ( 43a), the timer circuit section 42 which receives the stop signal from the constant voltage circuit section 41 and outputs a stop signal to the photo coupler 43b, but automatically cuts off the stop signal output to the photo coupler 43b after a predetermined time elapses. In the electrically insulated state, the stop signal from the timer circuit 42 is electrically connected to output the stop signal to the gate driver 44. ON / OFF by the gate driver 44 and the gate driver 44 which receive the stop signals from the photo coupler 43b and the photo coupler 42a and compare them, and output an operation signal to the switching element 44. The switching element 45 is operated and controlled to excite / element the coil 46, and the diode 47 is disposed in parallel to the coil 46 to form a closed circuit.
Each circuit part constituting the stop solenoid according to the present invention is applicable to all known circuits for maintaining the function of each circuit part.
Referring to the operation of the stop solenoid according to the present invention, when the stop signal contact (3) is ON, the stop signal is transmitted to the constant voltage circuit section 41 → photocoupler (43a) → gate driver 44, at the same time stop The stop signal from the signal contact 3 is transmitted to the constant voltage circuit section 41 → timer circuit section 42 → photocoupler 43b → gate driver 44, and thus the stop signal from both photo couplers 43a and 43b. Is input to the gate driver 44, the gate driver 44 detects / determines the operation and controls the switching element 45 to maintain the ON state. Thus, the plunger (not shown) is pulled because the coil 44a is kept in an excited state.
After that, since the stop signal is interrupted by the timer circuit 42 when the predetermined time elapses, the photo coupler 43b is electrically insulated and the output of the stop signal to the gate driver 45 is stopped. In this way, the photo coupler 43b When the output of the stop signal from the block is cut off, the gate driver 44 detects / determines it and operates the switching element 45 to repeat the ON / OFF at a predetermined speed to supply the coil 46 from the battery 1. Allow the amount of operating current to be reduced. Accordingly, the plunger quickly pulled through the coil 46 excited by the initial supply power from the battery 1 receives the reduced power by the switching element 45 that is switched ON / OFF. The state of pulling is maintained by means of (46).
Thereafter, when the stop signal contact 3 is turned off, the photo coupler 43a is also electrically insulated so that the output of the stop signal to the gate driver 44 is stopped, so that no stop signal is input to the gate driver 44. The operation of the gate driver 44 is stopped and the switching element 45 is turned off. As described above, after the switching element 45 is turned off, the counter electromotive force generated while the plunger is returned to the initial state due to the element of the coil 44b is induced in the diode 47 and then discharged in the closed circuit. In addition, since the photo couplers 43a and 43b are electrically insulated, the constant voltage circuit portion 41 and the timer circuit portion 46 are protected and the back electromotive force to the stop signal contact 3 is cut off.
Meanwhile, the electromotive force generated at both ends of the coil 44a is dissipated by the diode 47 connected in parallel to the coil 44a to form a closed circuit.
Further, according to the present invention, after the plunger is pulled to the limit position, the conversion for holding the pulled plunger is performed electrically by the timer circuit 46, so that there is less error in operation and mechanically of the conventional stop solenoid 400. The problem with the limit switch 403 actuated is solved.
According to the present invention as described above, while the input line of the stop solenoid is separated from the operating power input line and the stop signal input line, the excitation / element control of the coil is electrically processed by the respective circuit parts constituting the stop solenoid In addition, since the function of the stop signal is prevented from being damaged, the operation function is improved, and since a closed circuit is formed by a diode connected in parallel to the coil, the counter electromotive force is extinguished, thereby eliminating the problem caused by the conventional counter electromotive force.
On the other hand, according to the present invention, since the counter electromotive force is interrupted while the operation power input line and the stop signal input line are separated, the capacity of the stop signal contact can be minimized, and the effect of miniaturization and weight reduction is expected.
The present invention is not limited to the above embodiments and can be modified in various ways without departing from the scope of the following claims.

权利要求:
Claims (1)
[1" claim-type="Currently amended] The coil 46 connected to the power supply line, the constant voltage circuit portion 41 for receiving the stabilization signal from the stop signal contact 2 and stabilizing it, and by the stop signal from the constant voltage circuit portion 41 in an electrically insulated state. Connected to the photocoupler 43a for outputting the stop signal to the gate driver 44 and the stop signal from the constant voltage circuit unit 41 and outputting the stop signal to the photo coupler 43b, but after a predetermined time elapses. Timer circuit section 42 for blocking the output of the stop signal to the photo coupler 43b, electrically connected by the stop signal from the timer circuit section 42 in an electrically insulated state, and outputting a stop signal to the gate driver 44. A gate for receiving a stop signal from the photo coupler 43b and the photo coupler 42a and comparing the same, and outputting an operation signal to the switching element 44. Switching device 45 for ON / OFF operation controlled by driver 44, gate driver 44 to excite / element coil 46, and diode 47 arranged in parallel to coil 46 to form a closed circuit. Stop solenoid of the diesel engine consisting of.

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同族专利:

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引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
1998-12-31|Application filed by 추호석, 대우중공업 주식회사

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1998-12-31|Priority to KR1019980062662A

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2000-07-25|Publication of KR20000046002A

优先权:

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申请号 | 申请日 | 专利标题

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KR1019980062662A|KR20000046002A|1998-12-31|1998-12-31|Stopping solenoid of diesel engine|