Device for reducing engine speed at idle

 

(57) Abstract:

The invention relates to engine, in particular to a device for the automatic translation engine to idle. Device for reducing engine speed at idle contains the current sensor, the input of which is connected with the load, and the output is connected through a threshold element and the amplifier with the throttle of the engine. The device further comprises a temperature sensor, the input of which is connected with an actuating device, and the second threshold element. The current sensor provides a selectable item. All threshold elements in the form of logic elements AND, the outputs of which are connected in parallel. The input of the first logic element AND IS NOT associated with the current sensor, the input of the second logical element AND-NOT - with temperature sensor. The technical result consists in increasing the reliability, saving energy and extending the functionality of working simultaneously on two channels. 1 Il.

The invention relates to a device for the automatic translation engine to idle and can be used in welding machines.

A device for otkatchiki zero speed), connected to the inputs of the system OR IS NOT connected via a threshold element, time relay and actuator valve of the engine.

However, when idling, the device does not reduce the engine speed and disables it. It does not ensure the constant readiness of the engine to work, which is especially important in the winter time. In addition, the sensors zero speed have rotating elements or movable electrical contacts, which reduces Nezhnost device.

It is also known actuating device AP-01 OJSC ISKRA" (Passport YEATS. 561712. 001 SS "welding Unit DAS-2502-1 U1" S. 12, 14-16, 19) designed to automatically reduce engine speed to idle, adopted as a prototype, containing a current sensor with analog element, the input of which is connected with the load, and the output - through limiting device, the first amplifier, the threshold element (trigger), the second amplifier and the actuator (solenoid) - with the throttle of the engine.

The disadvantage is the presence of a current sensor analog element having mechanical components (coil, insulation, etc., when heated rapidly destroyed), which reduces the reliable engine when switching to the idle mode, that does not provide the maximum reduction of the engine speed at idle, and only partial to 1200 rpm It increases energy consumption. The absence of the device as threshold elements logical elements AND IS NOT not possible to de-energize (turn off) the solenoid idling of the engine. As is known, the operating time of the engine idling significantly more time under load, which leads to a large consumption of electric power.

In addition, the absence of a temperature sensor, the second threshold element and the parallel connection of the outputs of the two logic elements AND NOT between them does not allow you to affect the execution unit via two channels simultaneously, but only one that reduces the functionality of the device. Finally, the disadvantage is the large number of radio, which reduces the reliability of the device.

The objective of the invention is to improve the reliability, economy of electric power and enhanced functionality due to work simultaneously on two channels.

The proposed device for reducing engine speed at idle contains data device, connected with the throttle of the engine.

Unlike the prototype, it further comprises a temperature sensor, the input of which is connected with an actuating device, and the second threshold element, and the current sensor provides a selectable item, all of the threshold elements in the form of logic elements AND, the outputs of which are connected in parallel, the input of the first logic element AND IS NOT associated with the current sensor, the input of the second logic element AND IS NOT associated with the temperature sensor.

The presence of a current sensor discrete element allows full (maximum) close the throttle of the engine when switching to idle mode. The logic state of the discrete element is changed from low (logical zero) to high (logical units) depending on the load. This allows you to open the throttle of the engine, providing the maximum reduction of the engine speed at idle to 800 rpm (1.5 times lower than in the prototype), which saves electrical energy. In addition, discrete element consists of chips (no mechanical components, as in an analog sensor prototype), which increases the reliability of the device. The nalitch is a separate estimate, AND IS NOT, and the parallel connection of the outputs of all logic elements AND NOT between them allows you to operate the device through two channels simultaneously: current and heat for one load, that extends the functionality. In addition, the presence of logical elements AND IS NOT possible to disable the electromagnet idling of the engine, as when there is no load on their outputs the logic state is changed from the high logic unit and to a minimum - a logical zero. This saves the consumption of electrical energy. Finally, the presence of logical elements AND does NOT allow to reduce the number of radio, which further enhances the reliability of the device.

As a result, all the hallmarks are significant and solve the assigned task.

The device shown in the drawing.

The inventive device includes a current sensor 1 with discrete element (based on the magnetic chip DD KK), mounted on the welding cable (not shown), and associated input load 2 (arc welding), and the output from the first logical element AND-NOT 3, connected via the amplifier 4 and the actuator 5 (includes solenoid) with the throttle of the engine 6, the second logical element AND-NOT 7 associated with the input with the output of the temperature sensor 8 (thermistor KMT-1). The temperature sensor 8 is mounted on the motor housing 6 and the input e of the horn elements and their outputs are connected in parallel.

The device operates as follows.

In the absence of load - welding (arc welding) - powered thermal channel: on the conclusions of the Executive device 5 serves voltage of 12 V and operates the temperature sensor 8 (with cold engine 6), which is a logical element AND-NOT 7 (with power logical unit of output) and the amplifier 4 acts on the electromagnet actuators 5, the maximum opening of the throttle valve of the engine 6. The engine 6 is gaining momentum from zero to nominal mode 1800 rpm as heat in the motor housing 6 and a temperature sensor 8 at the inputs of the logical element AND-NOT 7 the voltage of the logic unit is reduced and when the pre-set resistor (not shown) temperature rating 90oC becomes equal to 2.9, which corresponds to a logical zero. The output of the logical element AND-NOT 7 also appears logical zero, that through the amplifier 4 operates (turns off) the solenoid actuator 5, fully (maximum) closing the throttle of the engine 6 (flap returns to its original position). Thus, the motor 6 is automatically moved in idle mode, clochette current channel. At the moment of ignition of the welding arc welding cable (not shown) flows a current which creates a magnetic field that interacts with a discrete element of the current sensor 1, thereby providing load the emergence of logical units at its output and at the output of the logical element AND-NOT 3, acting through the amplifier 4 to the electromagnet actuators 5, which is the maximum (fully opens the throttle of the engine 6, and he goes into work mode with a nominal speed of 1800 Rev/min When the process breaks (1-3 min) current welding cable (not shown) is missing. The logic state at the output of the current sensor 1 is changed from logical one to logical zero and then a similar effect on the logical element AND-NOT 3, the output of which will be a logical zero. Then through the amplifier 4, the impact is transmitted to the electromagnet actuators 5, the maximum closing the throttle of the engine 6, and he goes and idling, reducing the speed to 800 rpm

Device for reducing engine speed at idle, containing the current sensor, the input of which is connected with the load, and exit through progammatic temperature, the inlet of which is connected with the actuating device and the second threshold element, and the current sensor provides a selectable item, all of the threshold elements in the form of logic elements AND, the outputs of which are connected in parallel, the input of the first logic element AND IS NOT associated with the current sensor, the input of the second logical element AND-NOT - with temperature sensor.

 

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