KR101090664B1 - Automatic engine torque selection system corresponding to load factor - Google Patents

Abstract

The present invention relates to an automatic engine torque converter according to the workload of construction equipment, in particular, an engine controller for controlling the overall drive of the engine, a torque conversion selection switch and construction equipment that the driver can manually convert the torque of the engine In construction equipment having an equipment controller for controlling the driving of various electrical appliances installed in the apparatus, a CAN is additionally installed between the engine controller and the equipment controller, and the equipment controller includes two or more torque characteristics including fuel consumption information. By additionally inputting a control program, the equipment controller receives the engine fuel consumption output from the engine controller through the CAN at predetermined time intervals, calculates the load ratio based on the load, and compares the result with a preset reference load ratio. To select engine torque characteristics for your workload By sending a control signal corresponding to the engine torque characteristic to the engine controller causes the engine controller is characterized in that to control the fuel injection quantity and injection timing of the engine according to the torque characteristic selected by the machine controller.

Therefore, the engine torque characteristic can be automatically selected to produce sufficient torque in working conditions that require large torque characteristics, and the engine torque characteristic can be automatically selected so that excessive torque is not used under the operating conditions that require small torque characteristics, so that fuel is unnecessary. Can be prevented from being consumed, and the engine torque can be automatically converted according to the change of the workload and work type at that time without the need of a separate torque changeover switch. Can solve the problem.

Construction equipment, engine controller, equipment controller, torque characteristics, fuel consumption, load rate

Description

Automatic engine torque selection system corresponding to load factor of construction equipment

1 is a schematic configuration diagram of a conventional torque converter.

2 is a block diagram of an apparatus of the present invention.

3 is a torque characteristic diagram of an engine to which the present invention device is applied.

Explanation of symbols on the main parts of the drawings

1: torque conversion selection switch

2: engine

3: engine controller

4: Equipment controller

5: CAN

The present invention relates to an automatic engine torque converter according to a workload of construction equipment. More specifically, a machine control unit (MCU) receives fuel consumption information from an engine control unit (ECU) Based on this, the control signal for calculating the average workload and operating the engine with the appropriate torque characteristics is outputted from the machine controller to the engine controller, so that the engine torque characteristics are automatically generated to produce sufficient torque in working conditions that require large torque characteristics. In order to make a selection and under the working conditions requiring a small torque characteristic, the invention is invented to greatly reduce fuel by automatically selecting engine torque characteristics so that excessive torque is not used.

That is, the average workload of the equipment is calculated by using the fuel consumption information, which is one of the information of the engine controller installed in the construction equipment, and based on this, it is automatically converted into the engine torque characteristic suitable for the current working load condition. It relates to an automatic engine torque converter according to the workload of the construction equipment invented to significantly reduce unnecessary fuel consumption.

In Korea, the Americas, and Europe, environmental regulations such as emission regulations are gradually tightening for automobiles, as well as various construction equipment such as excavators and wheel loaders.

Therefore, in order to satisfy this, most of the equipment is equipped with an electronic control engine capable of precisely controlling the fuel injection amount and injection timing through the engine controller.

Such an electronically controlled engine usually has a lot of information necessary for the operation of the engine, such as engine speed, engine oil temperature, pressure, coolant temperature, and fuel consumption, and the MCU, which is an equipment controller, communicates with the controller through CAN (Controller Aided Network) communication. Can be received from the ECU, the engine controller, and the equipment can implement various control functions using the same.

In addition, the conventional engine, in which the fuel injection amount and the injection timing are controlled by the mechanical structure, has only one characteristic of torque indicating engine performance, whereas in an electronic control engine, it is possible to have one or more torque characteristics through an engine controller. Despite this, the conventional construction equipment did not have such a function.

That is, in the conventional construction equipment, although the equipment controller 4 is provided, the engine torque conversion is not automatically performed as described above, and as shown in FIG. 1, the driver subjectively determines the working condition or the load and is located in the driver's seat. The engine controller 3 for selectively operating the torque conversion selection switch 1 to control the engine 2 is configured to be manually operated such that the engine is operated with a preset torque characteristic.

In this case, the torque conversion of the engine operates independently of the MCU which is the equipment controller.

In the conventional construction equipment configured as a manual as described above, torque conversion is made based on the driver's judgment, not on the objective workload, so that the engine can be driven with a small torque characteristic in a work condition requiring a large torque characteristic. On the contrary, there is a problem in that the engine is driven by a large torque characteristic under a condition requiring a small torque characteristic, which consumes a lot of fuel unnecessarily; There is help.

The present invention has been made in order to solve such a conventional problem, and continuously receives fuel consumption information from the engine controller (ECU) in the equipment controller (MCU) installed in various construction equipment based on this calculates the average workload Then, by outputting a control signal that allows the engine to operate with the appropriate torque characteristic to the engine controller, the engine torque characteristic is automatically selected to produce sufficient torque in working conditions that require large torque characteristics. By automatically selecting the engine torque characteristics so that excessive torque is not used under working conditions that require the characteristics, it is possible to prevent unnecessary fuel consumption and to change the workload and work type without the need for a separate torque conversion switch. Engine torque can be changed automatically It is to provide an automatic engine torque converter according to a workload of construction equipment which can solve the trouble of having to operate a separate switch, the torque conversion that purpose.

In order to achieve the above object, the present invention apparatus detects operation information of an engine such as engine speed, oil temperature, pressure, coolant temperature, and fuel consumption, and controls fuel injection amount and injection timing required for driving the engine. An engine controller comprising: an engine controller; and a construction controller including a torque conversion selection switch installed in a driver's seat so as to allow a driver to manually convert the torque of an engine, and an equipment controller for controlling the operation of various electrical appliances installed in construction equipment. A CAN, which is a communication interface, is additionally installed between the controller and the equipment controller, and the equipment controller additionally inputs two or more torque characteristic control programs including fuel consumption information so that the equipment controller receives the engine controller from the engine controller through the CAN. The load factor is calculated based on the engine fuel consumption output. By comparing this with the preset reference load rate, the engine torque characteristic corresponding to the workload is selected and the control signal corresponding to the engine torque characteristic is sent to the engine controller so that the engine controller does not operate the torque conversion selection switch. Characterized in that the fuel injection amount and the injection timing of the engine in accordance with the torque characteristics.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows a block diagram of the apparatus of the present invention, Figure 3 shows a torque characteristic diagram of the engine to which the apparatus of the present invention is applied.

Accordingly, the apparatus of the present invention detects the operation information of the engine, such as the rotational speed of the engine 2 and the oil temperature, the pressure, the coolant temperature, and the fuel consumption, as well as the fuel injection amount and the injection timing required for driving the engine 2. The engine controller 3 to control, the torque conversion selector switch 1 installed in the driver's seat so that the driver can manually convert the torque of the engine 2, and the equipment controller to control the driving of various electric appliances installed in the construction equipment (4) construction equipment comprising:

A communication interface CAN 5 is additionally installed between the engine controller 3 and the equipment controller 4, and the equipment controller 4 additionally includes two or more torque characteristic control programs including fuel consumption information. Inputs the engine fuel consumption output from the engine controller 3 through the CAN 5 to calculate the load ratio based on the input, and then compares it with a preset reference load ratio to perform a corresponding workload. After selecting the proper engine torque characteristic, the control signal corresponding to the corresponding engine torque characteristic is sent to the engine controller 3 so that the engine controller 3 can control the torque characteristic even if the driver does not operate the torque conversion selection switch 1. It is characterized in that to control the fuel injection amount and the injection timing of the engine.

Referring to the operation and effect of the device of the present invention configured as described above are as follows.

First, the apparatus of the present invention is a known construction equipment comprising an engine controller 3, a torque conversion selection switch 1, and an equipment controller 4, which communicates between the engine controller 3 and the equipment controller 4; An interface CAN 5 is additionally installed, and the equipment controller 4 additionally inputs two or more torque characteristic control programs including fuel consumption information to cause the equipment controller 4 to perform current work on construction equipment. After determining the engine torque characteristic according to the load ratio, the result is generated in the engine controller 3 so that the engine controller 3 controls the fuel injection amount and the injection timing of the engine according to the torque characteristic. .

At this time, the engine controller 3 detects the operation information of the engine, such as the rotational speed of the engine 2 and oil temperature, pressure, coolant temperature and fuel consumption, as described above, and controls the engine through its own program. (2) controlling the fuel injection amount and the injection timing required for the operation of the engine, as well as the fuel injection amount of the engine in accordance with the engine torque characteristics selected by the equipment controller 4 received through the CAN (5) sent from the equipment controller (4) And injection timing.

In the above description, the load ratio refers to a percentage obtained by dividing the actual fuel consumption value currently being consumed by the engine by the theoretical fuel consumption value required to exhibit the maximum torque at the rated engine operation.

In addition, the equipment controller 4 receives the fuel consumption information continuously from the engine controller 3 through the CAN 5 normally, and calculates and sets in advance the average load ratio currently being worked on the equipment. Compared with the reference load ratio, and when the result is higher than the reference load ratio, the control signal corresponding to the large torque characteristic is automatically sent to the engine controller 3, and the engine controller 3 causes the engine to operate at the corresponding torque characteristic. Allow control to operate.

When the average load ratio is smaller than the set load ratio as a result of the comparison in the equipment controller 4 as described above, a control signal corresponding to a small torque characteristic is automatically sent to the engine controller 3 to cause the engine controller 3 to engine the engine. By controlling to operate with this small torque characteristic, unnecessary fuel consumption can be prevented.

When controlled in this way, the electronic control engine 2 should have a function capable of exhibiting two torque characteristics, such as large torque characteristics and small torque characteristics, depending on the weight of the workload, and in some cases, the workload described above. The application is also possible to subdivided into three or more torque characteristics.

On the other hand, the above-mentioned average load ratio calculation cycle and reference load ratio values can be programmed to be changed and set by the designer in consideration of the type of construction equipment (for example, excavator or wheel loader) and the nature of the workplace, When changing to different torque characteristics in a short time interval, there is a risk of increasing the driving fatigue to the driver. Therefore, calculating the average load ratio at least one minute or more so that the corresponding torque characteristics are transmitted to the engine controller 3. desirable.

In addition, Figure 3 is a torque characteristic diagram showing the two torque characteristics of the above-mentioned electronic control engine, the large torque characteristics shown by the solid line is designed to meet the general standard work or the work that requires a large force, the dotted line The small torque characteristics indicated by the design are designed for light load applications that do not require large forces.

It should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

As described above, according to the apparatus of the present invention, the equipment controller installed in various construction equipment continuously receives fuel consumption information from the engine controller, calculates an average workload ratio based on the same, and then operates the engine with a suitable torque characteristic. By outputting a control signal to the engine controller, the engine torque characteristic can be automatically selected to produce sufficient torque in working conditions requiring large torque characteristics, and the engine is prevented from using excessive torque under working conditions requiring small torque characteristics. The automatic selection of the torque characteristics prevents unnecessary fuel consumption, as well as automatically converts the engine torque according to changes in the workload and work type at that time without the need for a separate torque conversion switch. Separate torque conversion switch It is a very useful invention that can solve the trouble of manipulating the position (that is, improving the operability of the driver).

Claims (3)

In the construction equipment having an engine controller for controlling the overall driving of the engine, a torque conversion selection switch for converting the torque of the engine and an equipment controller for controlling the operation of the electrical equipment installed in the construction equipment, A CAN, which is a communication interface, is additionally installed between the engine controller and the equipment controller, and a program for controlling torque characteristics including fuel consumption information is input into the equipment controller so that the equipment controller is controlled from the engine controller through the CAN. The engine fuel consumption is input at a predetermined time interval, and the load ratio is calculated based on the engine fuel consumption. The result is compared with the preset reference load ratio to select the engine torque characteristic corresponding to the workload. And an engine controller for controlling the fuel injection amount and the injection timing of the engine according to the torque characteristics selected by the equipment controller by transmitting a control signal to the engine controller. delete delete

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