Mine car engine landing and rotating speed control auxiliary device
By using a DC adjustable power transformer and temporary wiring harness to drive the engine's EFC electronic speed governor, the problem of difficult fault diagnosis after engine shutdown is solved, enabling rapid fault diagnosis and simplified maintenance, and reducing maintenance costs and time.
Patent Information
- Application Number
- CN202423104448.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-17
AI Technical Summary
In the existing technology, the engine of the 130-ton electric wheel truck produced by BelAZ Automobile in Russia is prone to stalling when the control circuit or oil circuit fails, making fault diagnosis difficult, requiring the replacement of expensive spare parts, affecting production and increasing maintenance time.
Design an auxiliary device for starting and controlling the engine speed of a mining truck. The device uses a DC adjustable power transformer and a temporary wiring harness to directly drive the engine's EFC electronic speed governor. By adjusting the voltage to control the oil circuit valves, the device can start the engine and regulate its speed, thus simplifying fault diagnosis.
Quickly identify the cause of the malfunction, reduce repair time and spare parts costs, ensure safe vehicle transportation, avoid production stoppages, and save spare parts costs and time.
Smart Images
Figure CN223781523U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engine control technology, specifically an auxiliary device for starting and controlling the speed of a mining truck engine. Background Technology
[0002] The 75131 model 130-ton electric wheel truck produced by the BelAZ Automobile Plant in Russia is equipped with a KTA-50C engine manufactured by Cummins in the United States. The engine has a rated power of 1,600 horsepower, a rated speed of 1,950 rpm, and a rated displacement of 50 liters. The fuel control of this model engine is that diesel fuel is drawn from the fuel tank by a PT pump, pressurized by the PT pump, and then sent to the EFC electronic speed governor. After the EFC controls the flow, the diesel fuel enters the engine.
[0003] When starting the engine, a matching accelerator pedal, speed sensor, wiring harness, PT pump, and engine control module (ECM) manufactured by Cummins are required to drive the EFC electronic speed governor. However, in actual operation of large trucks, a fault in the engine's electrical or fuel system can cause the engine to suddenly stall. If the various sensor indicator lights on the dashboard are normal, it's impossible to quickly and accurately determine the cause of the fault or which of the aforementioned components is damaged and causing the engine stall. The only solution is to replace the component. However, the components controlling engine starting and speed are expensive, increasing costs and time. If the engine stalls and the truck is unable to start in narrow sections, manholes, or unloading areas, it will affect the operation of other vehicles and, in severe cases, cause production shutdowns.
[0004] Therefore, to avoid the inability to quickly find the cause of failure after the engine of a large electric wheel trolley stalls, we designed and developed a new type of auxiliary device for starting and controlling the engine speed of mining trucks. When all the sensor indicator lights on the instrument panel are normal, after the engine stalls, there is no need to use the original engine's accelerator pedal, speed sensor, wiring harness, and ECM to start the engine. Instead, a temporary DC adjustable power transformer and temporary wiring harness in the cab directly drive the engine's EFC electronic speed controller. Turning the key will start the engine and control the engine speed, allowing the vehicle to be driven to a safe location or repair area for maintenance without affecting the operation of other vehicles. If the engine cannot start, it can also quickly determine whether the engine stall is caused by a fault in the PT pump circuit or the ECM circuit. The fault diagnosis is convenient and quick, without the need for component replacement experiments, shortening the fault repair time and saving spare parts costs. Utility Model Content
[0005] The purpose of this utility model is to provide an auxiliary device for starting and controlling the speed of a mining car engine, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] An auxiliary device for starting and controlling the speed of a mining truck engine includes a DC adjustable power transformer, a potentiometer on the DC adjustable power transformer for adjusting the output voltage of the DC adjustable power transformer, a temporary input harness at the input end of the DC adjustable power transformer connected to the vehicle battery, and a temporary output harness at the output end of the DC adjustable power transformer connected to the engine EFC electronic speed controller.
[0008] Compared with the prior art, the beneficial effects of this utility model are:
[0009] This device connects a DC adjustable power transformer directly to the car battery and the engine's EFC (Electronic Fuel Control) system. While starting the vehicle, the voltage on the EFC system is adjusted by regulating the potentiometer on the DC adjustable power transformer. When the EFC system reaches its operating voltage, the fuel valve on the EFC system opens, allowing diesel fuel to enter the EFC system via the PT (Potential Transmission Pump). The fuel then enters the engine through the opening of the EFC system's fuel valve, thus starting the engine. By controlling the voltage of the EFC system, the system can control... The degree of opening and closing of its valve controls the amount of fuel entering the engine, thereby regulating the engine speed. After the engine starts, the voltage applied to the EFC electronic speed governor can be controlled by the maintenance personnel, and the driver can work together to drive the car to the repair location. If the engine still cannot start even when all the sensor indicator lights on the dashboard are normal, it can be determined that the engine failure to start is due to a PT pump oil circuit fault. The fault diagnosis is convenient and quick, without the need for frequent component replacement and testing, shortening the fault repair time and saving spare parts costs. The device has a simple structure and is highly practical. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the engine starting and speed control auxiliary device for the mining car of this utility model;
[0011] Figure 2 A schematic diagram of the control device for the original EFC electronic speed governor of the KTA-50C engine.
[0012] Figure 3 This is a schematic diagram of the diesel fuel flow direction in the engine.
[0013] In the diagram: 1. DC adjustable power transformer; 2. Potentiometer; 3. Transformer temporary input harness; 4. Car battery; 5. Transformer temporary output harness; 6. Engine EFC electronic speed controller; 7. ECM; 8. Accelerator pedal; 9. Fire stop solenoid valve; 10. Speed sensor. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1
[0015] Please see Figure 1-3 This embodiment provides an auxiliary device for starting and controlling the speed of a mining truck engine, including a DC adjustable power transformer 1. A potentiometer 2 is provided on the DC adjustable power transformer 1 for adjusting the output voltage of the DC adjustable power transformer 1. A temporary input harness 3 is provided at the input end of the DC adjustable power transformer 1 and is connected to the vehicle battery 4. A temporary output harness 5 is provided at the output end of the DC adjustable power transformer 1 and is connected to the engine EFC electronic speed controller 6.
[0016] To enable those skilled in the art to better understand this application, the operating principle of the KTA-50C engine will be explained below using the 75131 mining car as an example:
[0017] In practical applications, as a common design in this field, due to the harsh working environment of mining trucks, engine accessories installed on these vehicles frequently malfunction. The air and water systems required for engine operation are separate systems, rather than being integrated and interlocked through an ECM. This avoids the inability to accurately diagnose the cause of a fault after ECM failure. Various engine parameters (such as oil pressure, oil temperature, coolant level, water temperature, diesel pressure, and air filter blockage) are indicated by sensor indicator lights on the instrument panel. Problems can be manually repaired after they occur. Figure 2 As shown, the ECM only receives signals from the accelerator pedal 8, the engine shutdown solenoid valve 9, and the speed sensor 10. It then controls the opening and closing of the fuel line valves by controlling the voltage of the engine ECF electronic speed governor 6, thereby controlling the amount of diesel fuel entering the engine after being pressurized by the PT pump, so as to start the engine and regulate the engine speed.
[0018] The traditional starting method involves simply pressing the accelerator pedal 8 and turning the ignition key. This activates the ECM, opens the ignition solenoid valve 9, and simultaneously, the ECM7 controls the engine EFC electronic governor 6. The fuel valves of the engine EFC electronic governor 6 open, and the engine motor drives the engine to rotate. The engine rotation drives the PT pump, which draws diesel fuel from the fuel tank into its interior. After being pressurized by the PT pump, the fuel flows through the engine EFC electronic governor 6, controlling the flow rate and thus starting the engine. Pressing the accelerator pedal 8 causes a change in the potentiometer inside the pedal, which transmits a signal to the ECM7. The ECM7 outputs a control voltage to control the engine EFC electronic governor 6, causing the opening degree of its fuel valves to change synchronously with the engine speed, thereby controlling the amount of fuel entering the engine and regulating the engine speed.
[0019] If the mining truck stalls while in motion, and all sensor indicator lights on the dashboard are normal, and the engine's air and water systems are functioning correctly, but the engine fails to start when the key is turned and the accelerator pedal is pressed, the problem may lie with the ECM7 or PT pump. Therefore, if... Figure 1 As shown, disconnect the factory-installed control harness of the original engine EFC electronic speed governor 6, connect the DC adjustable power transformer 1 to the car battery 4 through the transformer temporary input harness 3, and connect the DC adjustable power transformer 1 to the engine EFC electronic speed governor 6 through the transformer temporary output harness 5. When starting the engine, one person turns the key while the other simultaneously adjusts potentiometer 2. After turning the key, the ignition solenoid valve 9 is energized, opening the oil passage to the engine and causing the engine and PT pump to rotate. Adjusting potentiometer 2 sets the engine EFC electronic speed governor 6 to its operating voltage, opening its oil passage valves. With both actions occurring simultaneously, the PT pump can then pump diesel fuel into the engine through the engine EFC electronic speed governor 6, allowing the engine to start and run. The diesel fuel flow direction is as follows: Figure 3 As shown, these are common knowledge familiar to those skilled in the art, and will not be described in detail here. After starting the engine, by adjusting potentiometer 2, the working voltage of the engine EFC electronic speed governor 6 is changed, which can change the opening and closing degree of the oil circuit valve of the engine EFC electronic speed governor 6, thereby adjusting the amount of oil entering the engine and thus controlling the engine speed.
[0020] If the engine still fails to start when the key is turned simultaneously and the engine EFC electronic speed governor 6 is at its operating voltage via potentiometer 2, the problem is likely with the PT pump or its oil circuit. The PT pump should be replaced or the engine oil circuit checked immediately. If the engine starts normally, the problem may lie with the ECM7, accelerator pedal 8, speed sensor 10, or the original engine wiring harness. The vehicle should be taken to a repair shop for repair. As is common knowledge familiar to those skilled in the art, if there is no engine start sound when the key is turned, the engine starter control circuit may be faulty, requiring immediate repair. Further details are omitted.
[0021] In practical applications, after a large vehicle experiences automatic engine shutdown, using this device can reduce the downtime by 5 hours per vehicle per instance (5 hours can transport 1500 tons of ore, generating a profit of 5000 yuan). Each vehicle can also reduce the cost of replacing spare parts by 30,000 yuan per instance. Based on a minimum of 10 instances of automatic engine shutdown per year, the annual profit can be at least 350,000 yuan. Furthermore, it can shorten maintenance time, ensure the safety of maintenance personnel, and has excellent practical performance.
[0022] It should be noted that the above embodiments are only specific and clear descriptions of the technical solutions and features of this application. Solutions or features that are prior art or common knowledge to those skilled in the art will not be described in detail in the above embodiments.
[0023] Furthermore, the technical solutions of this application are not limited to the above embodiments. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. An auxiliary device for starting and controlling the speed of a mining car engine, characterized in that, The system includes a DC adjustable power transformer (1), on which a potentiometer (2) is provided for adjusting the output voltage of the DC adjustable power transformer (1). A temporary input harness (3) is provided at the input end of the DC adjustable power transformer (1), which is connected to the car battery (4). A temporary output harness (5) is provided at the output end of the DC adjustable power transformer (1), which is connected to the engine EFC electronic speed controller (6).