KR20130057615A

KR20130057615A - Engine control system for construction equipment

Info

Publication number: KR20130057615A
Application number: KR1020110123426A
Authority: KR
Inventors: 손근하; 임준성
Original assignee: 현대중공업 주식회사
Priority date: 2011-11-24
Filing date: 2011-11-24
Publication date: 2013-06-03

Abstract

The present invention provides an RPM selector for selecting revolution per minute (RPM); An operation input unit for inputting an operation of construction equipment; A speed controller controlling a speed of an engine driving an operation according to the input operation; And an equipment controller connected to the RPM selector, the operation input unit, and the speed controller, and sensing an input of the operation input unit to control the speed controller to maintain the engine speed at the selected RPM. It relates to a construction equipment engine control system. As a result, the low idle area of the engine, which is vulnerable to the load, rises to a predetermined engine speed from the operation of each operating device and the engine speed selection switch in the low idle area of the engine, thereby actively complementing the low idle area. In addition, by preventing excessive use of the accelerator pedal to prevent sudden start-off or start-up off, it is possible to prevent unnecessary engine speed increase and to select a desired engine speed when needed to improve fuel economy. In addition, the driver can reduce fatigue while driving and work efficiency can be improved.

Description

Engine Control System for Construction Equipment

The present invention, through the monitor capable of supporting the engine speed selection switch (RPM Select Switch) or the user interface (Interface) in the engine of a construction machine, the engine speed in conjunction with the various operating devices on the equipment to actively activate the engine speed More specifically, it relates to a system for realizing ascension, and more particularly to a hydraulic control lever for operating a gear selector for driving or operating a work device in the engine low idle range. During operation or when steering wheel is operated to change direction, it rises to the engine speed determined according to the selected switch and actively responds to the load on the machine, responding to excessive engine speed drop in the low idle area and reducing operator fatigue. And an engine control system for construction equipment that improves work efficiency.

In construction equipment, if the load on the machine is high in the low idle range of the engine, the engine will start off due to excessive engine speed deterioration, and the engine will suddenly turn off or stop before the driver reacts to the engine. In order to do this, the driver urges the accelerator pedal swiftly, which causes excessive fuel consumption and driver fatigue due to an increase in engine speed more than necessary.

On the other hand, in the invention disclosed in the following patent document, the engine torque characteristic can be automatically selected to produce sufficient torque in working conditions requiring a large torque characteristic, and the engine torque is prevented from using excessive torque under the working conditions requiring a small torque characteristic. The automatic selection of the characteristics prevents unnecessary fuel consumption, as well as the automatic conversion of the engine torque due to changes in the work load and work type at that time without the need for a separate torque conversion switch. This eliminates the need to operate separate torque conversion switches.

However, in work where the low speed range of the engine (eg 1200 RPM or less) is expected, such a complicated mechanism is not necessary. In addition, if the driver accidentally presses the accelerator pedal, it may cause fuel consumption to exceed the appropriate RPM.

Patent Publication No. 1020060129943

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to provide an engine for construction equipment to solve the problem of excessive use of an accelerator pedal and starting-off for an on-machine load in a low engine speed range. The present invention provides a control system, and more specifically, in the engine low idle, when the driver operates the forward / reverse lever for driving or the hydraulic control lever for working device operation or changes direction. The present invention provides a construction equipment engine control system that actively raises and responds to a load on a machine by preliminarily increasing the engine speed according to a selected switch when operating a steering wheel.

Construction equipment engine control system according to the present invention for solving the above problems, RPM selector for selecting a revolution (rpm); An operation input unit for inputting an operation of construction equipment; A speed controller controlling a speed of an engine driving an operation according to the input operation; And an equipment controller connected to the RPM selector, the operation input unit, and the speed controller, and sensing an input of the operation input unit to control the speed controller to maintain the engine speed at the selected RPM. It is done.

In this case, the RPM selector may be an RPM selection switch or a user interface monitor.

In addition, the range of the RPM may be OFF or 1000 to 1200 RPM.

In addition, the operation input unit may include a hydraulic control level, a steering handle, an electric steering lever and a travel switch, and a forward and reverse gear selector.

According to the present invention, the low idle area of the engine, which is vulnerable to the load, rises to a predetermined engine speed from the operation of each operating device and the engine speed selection switch in the low idle area of the engine. In addition, it prevents excessive acceleration pedal to prevent sudden start-up or start-up off, and prevents unnecessary increase of engine speed, and selector switch is used to select the desired engine speed if necessary to improve fuel economy. do. In addition, the driver can reduce fatigue while driving and work efficiency can be improved.

1 is a block diagram of a construction equipment engine control system according to an embodiment of the present invention.
2 is a block diagram of a construction equipment engine control system according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a construction equipment engine control system according to a preferred embodiment. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

In addition, the size of each component in the drawings may be exaggerated for the sake of explanation and does not mean a size actually applied.

1 is a block diagram of a construction equipment engine control system according to an embodiment of the present invention. Referring to Figure 1, the construction equipment engine control system according to an embodiment of the present invention, RPM selector 100 for selecting the revolution (rpm), the operation input unit 200 for inputting the operation of the construction equipment, It is connected to the speed controller 5 for controlling the speed of the engine 12 for driving the operation according to the input operation, and the RPM selector 100, the operation input unit 200, and the speed controller 5, And an equipment controller 3 which senses the input of the operation input unit 200 and controls the speed controller 5 to maintain the speed of the engine 12 at the selected RPM.

More specifically, the RPM selector 100 may be composed of an RPM selector switch 4 selectable to OFF / 1000 RPM / 1100 RPM / 1200 RPM, for example, as shown in FIG. 1. It may also consist of a user interface capable monitor 10 selectable from the monitor via an interface with the user. This RPM selector 100, for example an RPM selector switch 4, is connected to the machine controller 3 to send and receive signals to and from the low speed zone 1/2/3 contained on the engine low speed speed controller. . In this case, the low speed region 1 is connected to 1000 RPM of the RPM selection switch 4, the low speed region 2 is connected to 1100 RPM of the RPM selection switch 4, and the low speed region 3 is connected to 1200 RPM of the RPM selection switch 4.

When the input of the operation is applied to the operation input unit 200 for inputting the operation of the construction equipment through this connection, the speed controller 5 controls to maintain the speed of the engine 12 at the selected RPM. Here, as shown in FIG. 1, the operation input unit may include one or more of the hydraulic control lever 1, the steering handle 9, the electric steering lever, and the travel switch 11. The operation of the hydraulic control lever 1 is sensed by a pressure sensor 2 connected to the hydraulic control lever 1, which sends a sensing signal to the equipment controller 3. In addition, the operation of the steering handle 9 is sensed by the pressure sensor 13 connected to the hydraulic main P / P connected to the steering handle 9, the pressure sensor 13 transmits a detection signal to the equipment controller (3) . In addition, the operation of the electric steering lever and the travel switch 11 is sensed by the equipment controller 3.

Then, the machine controller 3 which has received a detection signal from the pressure sensor 2 or 13 or sensed the operation of the electric steering lever and the travel switch 11 selects OFF according to the RPM selection switch 4 selected by the driver. When no engine function is implemented, or when 1000 RPM is selected, the low speed zone l on the engine low speed zone speed controller (5) is signaled. When 1100 RPM is selected, the low speed zone 2 on the engine low speed zone speed controller (5) is signaled. The low speed zone 3 on the low speed zone speed controller 5 is signaled to ascend at a predetermined RPM.

2 is a block diagram of a construction equipment engine control system according to another embodiment of the present invention. Referring to Fig. 2, a feature of this embodiment is that the motion input unit 200 is composed of a gear selector 6 and a transmission controller 7.

More specifically, this embodiment is similar to the embodiment of Figure 1, RPM selection switch 4 installed in the driver's seat of the equipment is selected as OFF / LOOORPM / 1100 RPM / 1200 RPM as shown in Figure 1 and three RPM You can choose. This RPM selector switch 4 is connected to the machine controller 3 of the machine and communicates with the low speed zone 1/2/3 contained on the engine low speed zone speed controller. This low speed region 1 is connected to 1000 RPM of the RPM selector switch 4, the low speed region 2 is connected to 1100 RPM of the RPM selector switch 4, and the low speed region 3 is connected to 1200 RPM of the RPM selector switch 4.

Through this connection, the transmission controller 7 detects and controls the operation of the gear selector in the low speed region after starting the machine and transmits a signal to the equipment controller 3 of the equipment and receives the signal. The machine controller 3 does not implement the function when selecting OFF according to the RPM selection switch 4 selected by the driver, or signals low speed zone 1 on the engine low speed speed controller 5 when selecting LOOORPM, and selects the engine when 1100 RPM is selected. The low speed zone 2 on the low speed zone speed controller 5 is signaled, and when 1200 RPM is selected, the low speed zone 3 on the engine low speed zone speed controller 5 is signaled to rise to a predetermined RPM.

The construction machinery engine control system configured as described above solves the problems of excessive use of the accelerator pedal for the load on the equipment in the low idle area and the start-off problem, reducing the fatigue of the driver and improving work efficiency. In the engine low range (Low Idle), the machine operator and the engine actively responds to the load on the machine by pre-raising the engine speed according to the selected switch when operating the gear selector, hydraulic control lever, or steering wheel. It is possible to provide an interlock system of rotational speed.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical spirit of the present invention should not be limited to the above-described embodiments of the present invention, but should be determined by the claims and equivalents thereof.

1: Hydraulic Control Lever
2, 13: pressure sensor
3: equipment controller
4: RPM selector switch
5: Engine Low Idle Speed Controller (Low Speed 1/2/3)
6; Gear selector
7: Transmission controller
8: hydraulic main P / P
9: steering wheel
10: monitor with user interface
11: electric steering lever and drive switch
100: RPM selector
200: operation input unit

Claims

An RPM selector for selecting revolution per minute (RPM);
An operation input unit for inputting an operation of construction equipment;
A speed controller controlling a speed of an engine driving an operation according to the input operation; And
An equipment controller connected to the RPM selector, the operation input unit and the speed controller, and configured to sense an input of the operation input unit to control the speed controller to maintain the engine speed at the selected RPM; Construction equipment engine control system comprising a.

The method of claim 1,
The RPM selector is a construction equipment engine control system, characterized in that the RPM selection switch or a user interface monitor.

The method of claim 1,
The range of the RPM is off (OFF) or construction equipment engine control system, characterized in that 1000 to 1200 RPM.

The method of claim 1,
The operation input unit,
A construction engine control system comprising a hydraulic control lever, a steering handle, an electric steering lever and a travel switch and a forward and reverse gear selector.