A diesel vehicle engine preheating and cab heating system and its application

Abstract

This invention discloses a diesel vehicle engine preheating and cab heating system and its application, including a water chamber preheating system and a cab heating system. The water chamber preheating system includes a fuel boiler, which serves as the heat source for both the engine preheating and cab heating systems. The fuel boiler is connected to the engine water chamber via an inlet pipe, and a water pump is installed at the connection between the fuel boiler and the inlet pipe. The fuel boiler is also connected to the engine water chamber via a return pipe and a short-connection water pipe. The engine preheating system (oil chamber preheating system) also includes a guide pipe connected to the fuel boiler. One end of the guide pipe, away from the fuel boiler, is connected to an oil pan guide groove at the bottom of the engine oil chamber. The fuel boiler uses the water pump to extract and heat the cooling water circulating in the engine water chamber. One path is delivered to the engine water chamber to preheat the engine block, and the other path is delivered to the cab heat exchanger to heat the cab, thus achieving the functions of engine block preheating and cab heating.

Description

Technical Field

[0001] This invention belongs to the field of diesel engine preheating technology, specifically relating to a diesel automobile engine preheating and cab heating system and its application. Background Technology

[0002] The high-altitude regions of Northwest my country face extreme climates year-round, including low temperatures, low air pressure, and strong winds. Winter temperatures often remain below -20°C, and at times even drop below -40°C, posing a severe challenge to the stable operation of open-pit mine production equipment and the safety of workers. Currently, mining areas primarily utilize heavy-duty mining trucks as transportation equipment, equipped with K38, K2000E, and QSK60 diesel engines as the core drive units, providing crucial support for mine transportation operations. However, in extreme low-temperature environments, diesel engines face multiple bottlenecks: when the engine oil temperature drops below -4°C, the engine control system triggers a low-temperature protection mechanism, restricting starting operations. Forced starting results in a sharp increase in oil viscosity and decreased fluidity, leading to poor lubrication. This can cause abnormal wear of engine components, or even serious mechanical accidents such as cylinder scoring and bearing failure, significantly shortening engine lifespan. For example, the cost of overhauling a QSK60 engine due to improper low-temperature operation is more than twice that of a normal overhaul, significantly increasing equipment maintenance costs and impacting the continuity of production in the mining area. Meanwhile, if the engine suddenly fails and stops during winter operations, the cab's air conditioning system will also fail, exacerbating the safety risks of frostbite and lack of heating for workers, further aggravating on-site safety hazards. To address these challenges, ensure reliable equipment operation, reduce maintenance costs, and strengthen personnel safety, it is urgently necessary to develop an integrated preheating system for diesel-powered mining heavy-duty truck engines and a cab heating system suitable for high-altitude and frigid conditions, providing comprehensive low-temperature protection for both equipment and personnel. Summary of the Invention

[0003] The purpose of this invention is to provide a diesel vehicle engine preheating and cab heating system and its application, in order to solve the problems mentioned in the background art.

[0004] The objective of this invention is achieved through the following technical solution: a diesel vehicle engine preheating and cab heating system, comprising a water chamber preheating system and a cab heating system, wherein the water chamber preheating system includes a fuel boiler, which serves as the heat source for the engine preheating and cab heating system, the fuel boiler being connected to the engine water chamber via an inlet pipe, a water pump being installed at the connection between the fuel boiler and the inlet pipe, and the fuel boiler being connected to the engine water chamber via a return pipe and a short-connection water pipe;

[0005] The cab heating system includes a cab heat exchanger and a heat exchanger inlet pipe connected to the inlet of the cab heat exchanger. The return water outlet of the cab heat exchanger is connected to the heat exchanger return water pipe. The other end of the heat exchanger return water pipe is connected to the engine water chamber. Cooling water heated by the fuel boiler is transported to the cab heat exchanger through the return water pipe, regulating valve, and heat exchanger inlet pipe. After being cooled by the built-in fan, it is then transported to the engine water chamber through the heat exchanger return water pipe.

[0006] The cooling water circulating in the engine water chamber is drawn out by a water pump, heated, and then delivered in two ways: one way to the engine water chamber to preheat the engine block, and the other way to the cab heat exchanger to heat the cab, thus achieving the functions of preheating the engine block and heating the cab.

[0007] Furthermore, it also includes an oil chamber preheating system, which includes a guide pipe connected to the fuel boiler. The end of the guide pipe away from the fuel boiler is connected to the oil pan guide groove at the bottom of the engine oil chamber, and an exhaust pipe is provided on one side of the oil pan guide groove.

[0008] Furthermore, an oil inlet pipe is connected to the oil boiler, an oil pump is installed at the connection between the oil boiler and the oil inlet pipe, the other end of the oil inlet pipe is connected to an oil tank, a return oil pipe is connected to the oil tank, and the other end of the return oil pipe is connected to the oil boiler.

[0009] The oil pump supplies fuel from the oil tank to the fuel oil boiler through the oil inlet pipe. The remaining fuel is then transported back to the oil tank through the oil return pipe, thus realizing the oil supply function of the fuel oil boiler.

[0010] Furthermore, the heat exchanger inlet pipe and return pipe are connected to the regulating valve, and one end of the short-circuit water pipe is connected to the regulating valve, while the other end is connected to the heat exchanger return pipe.

[0011] Furthermore, a water chamber temperature sensor is installed on the engine water chamber. The water chamber temperature sensor monitors the temperature of the cooling water in the engine water chamber, and the monitoring signal is transmitted to the fuel boiler through the water chamber temperature sensor wiring harness.

[0012] An oil chamber temperature sensor is installed on the engine oil chamber. The oil chamber temperature sensor monitors the oil temperature in the engine oil chamber, and the monitoring signal is transmitted to the fuel boiler through the oil chamber temperature sensor wiring harness.

[0013] Furthermore, the power supply for the control of the fuel-fired boiler and the power supply for the heat exchanger in the cab are both supplied by the starting battery of the mining heavy-duty truck.

[0014] Furthermore, the regulating valve can be either a manual regulating valve or an electric regulating valve, mainly serving the function of water flow distribution.

[0015] Furthermore, the fuel-fired boiler serves as the heat source for the engine preheating and cab heating system. It is a diesel-fired fuel-fired boiler, and the fuel supply system of the fuel-fired boiler is independently set up or directly draws fuel from the main fuel tank of the mining heavy-duty truck for combustion in the fuel-fired boiler.

[0016] Furthermore, the oil pan guide channel is detachably connected to the lower part of the engine oil pan, and the inside of the oil pan guide channel is coated with anti-corrosion material and the outside is coated with heat insulation material;

[0017] The oil pan guide groove is detachably connected to the lower part of the engine oil pan by bolts.

[0018] An application of a diesel vehicle engine preheating and cab heating system is disclosed, which is used to preheat the diesel vehicle engine and heat the cab of a diesel mining heavy-duty truck in high-altitude and cold-weather conditions, providing comprehensive low-temperature protection for equipment and personnel.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention utilizes a fuel-fired boiler to pump and heat the cooling water circulating in the engine water chamber. One path of the heated water is delivered to the engine water chamber to preheat the engine block; the other path is delivered to the cab heat exchanger to heat the cab. This achieves both engine block and cab preheating. The exhaust gas from the fuel-fired boiler is delivered through a guide pipe to the oil pan guide channel to preheat the engine oil, thus achieving engine oil preheating.

[0021] Before starting the engine, the fuel boiler is started first. When the temperature of the cooling water in the engine water chamber and the temperature of the engine oil in the oil chamber reach the set value, the fuel boiler automatically shuts down. Then the engine is started and runs normally, avoiding wear and tear on parts caused by low-temperature engine start-up and operation.

[0022] This invention can effectively reduce wear on engine components caused by low-temperature starting and also solve the problem of heating personnel after the engine stops. This invention is simple, practical, and easy to maintain. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall connection of the present invention. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] like Figure 1 As shown, a diesel vehicle engine preheating and cab heating system includes a water chamber preheating system and a cab heating system. The water chamber preheating system includes a fuel boiler 1, which serves as the heat source for the engine preheating and cab heating system. The fuel boiler 1 is connected to the engine water chamber 8 via a water inlet pipe 7. A water pump 6 is installed at the connection between the fuel boiler 1 and the water inlet pipe 7. The fuel boiler 1 is connected to the engine water chamber 8 via a return water pipe 9 and a short-connecting water pipe 14.

[0028] The cab heating system includes a cab heat exchanger 12 and a heat exchanger inlet pipe 11 connected to the inlet of the cab heat exchanger 12. The return water outlet of the cab heat exchanger 12 is connected to the heat exchanger return water pipe 13. The other end of the heat exchanger return water pipe 13 is connected to the engine water chamber 8. Cooling water heated by the fuel oil boiler 1 is transported to the cab heat exchanger 12 through the return water pipe 9, the regulating valve 10, and the heat exchanger inlet pipe 11. After being cooled by the built-in fan, it is transported to the engine water chamber 8 through the heat exchanger return water pipe 13. The fuel oil boiler 1 is installed on the frame on the side of the mining heavy-duty truck engine and is fixed by steel structure brackets and bolts.

[0029] The water pump 6 draws out the cooling water circulating in the engine water chamber 8, heats it, and then sends one stream to the engine water chamber 8 to preheat the engine block; the other stream sends it to the cab heat exchanger 12 to heat the cab, thus achieving the functions of preheating the engine block and heating the cab.

[0030] It also includes an oil chamber preheating system, which includes a guide pipe 17 connected to the fuel boiler 1. The end of the guide pipe 17 away from the fuel boiler 1 is connected to the oil pan guide groove 19 at the bottom of the engine oil chamber 18. An exhaust pipe 20 is provided on one side of the oil pan guide groove 19 (the exhaust gas discharged from the fuel boiler carries residual heat and is transported to the backflow groove through the guide pipe (based on the principle of Northeast earthen kang) to preheat the oil in the oil chamber).

[0031] The oil-fired boiler 1 is connected to an oil inlet pipe 3. An oil pump 2 is installed at the connection between the oil-fired boiler 1 and the oil inlet pipe 3. The other end of the oil inlet pipe 3 is connected to an oil tank 4. An oil return pipe 5 is connected to the oil tank 4. The other end of the oil return pipe 5 is connected to the oil-fired boiler 1.

[0032] The oil pump 2 supplies fuel oil from the oil tank 4 to the fuel oil boiler 1 through the oil inlet pipe 2. The remaining fuel oil is then transported back to the oil tank 4 through the oil return pipe 5, thus realizing the fuel oil supply function of the fuel oil boiler.

[0033] The fuel-fired boiler uses a water pump to extract and heat the cooling water circulating in the engine water chamber. One stream is then sent to the engine water chamber to preheat the engine block; the other stream is sent to the cab heat exchanger to heat the cab. This achieves the functions of preheating the engine block and heating the cab.

[0034] The heat exchanger inlet pipe 11 and return pipe 9 are connected to the regulating valve 10. One end of the short-connecting water pipe 14 is connected to the regulating valve 10. The regulating valve is a two-position three-way solenoid valve, and the other end is connected to the heat exchanger return pipe 13.

[0035] A water chamber temperature sensor 15 is installed on the engine water chamber 8. The water chamber temperature sensor 15 monitors the temperature of the cooling water in the engine water chamber 8, and the monitoring signal is transmitted to the fuel boiler 1 through the water chamber temperature sensor wiring harness 16. The water chamber temperature sensor is a resistance temperature detector (RTD) or a thermocouple sensor.

[0036] An oil chamber temperature sensor 21 is installed on the engine oil chamber 18. The oil chamber temperature sensor 21 monitors the oil temperature in the engine oil chamber 18. The monitoring signal is transmitted to the fuel boiler 1 through the oil chamber temperature sensor wiring harness 21. The oil chamber temperature sensor is a resistance temperature detector (RTD) or a thermocouple sensor. The detection data of the water chamber temperature sensor and the oil chamber temperature sensor are transmitted to the control system of the fuel boiler through the wiring harness.

[0037] The power supply for the control of the fuel-fired boiler 1 and the power supply for the cab heat exchanger 12 are both supplied by the starting battery of the mining heavy-duty truck.

[0038] The regulating valve 10 can be either a manual regulating valve or an electric regulating valve, and mainly serves the function of water flow distribution.

[0039] The fuel-fired boiler 1 serves as the heat source for the engine preheating and cab heating system. It is a diesel-fired fuel-fired boiler, and the fuel supply system of the fuel-fired boiler 1 is independently set up or directly draws fuel from the main fuel tank of the mining heavy-duty truck for combustion in the fuel-fired boiler.

[0040] The oil pan guide channel 19 is detachably connected to the lower part of the engine oil pan, and the inside of the oil pan guide channel 19 is coated with anti-corrosion material and the outside is coated with heat insulation material.

[0041] The oil pan guide groove 19 is detachably connected to the lower part of the engine oil pan by bolts.

[0042] The water chamber preheating system works as follows: Water pump 6 supplies cooling water from the engine water chamber 8 to the fuel boiler 1 via inlet pipe 7. After being heated by the fuel boiler 1, the cooling water is then transported back to the engine water chamber 8 via return pipe 9, regulating valve 10, and short-connecting water pipe 14, thus preheating the cooling water in the engine water chamber 8. Water chamber temperature sensor 15 monitors the temperature of the cooling water in the engine water chamber 8, and the monitoring signal is transmitted to the fuel boiler 1 via the water chamber temperature sensor wiring harness to control the operating status of the fuel boiler 1.

[0043] The working principle of the cab heating system is as follows: the cooling water heated by the fuel boiler 1 is transported to the cab heat exchanger 12 through the return water pipe 9, regulating valve 10, and heat exchanger inlet pipe 11. After being cooled by the built-in fan, it is then transported to the engine water chamber 8 through the heat exchanger return water pipe 13 to achieve the heating function of the cab.

[0044] The oil chamber preheating system works as follows: the exhaust gas from the fuel boiler 1 is transported through the guide pipe 17 to the oil pan guide groove 19, thereby preheating the oil in the engine oil chamber 18. The oil chamber temperature sensor 21 monitors the oil temperature in the engine oil chamber 18, and the monitoring signal is then transmitted to the fuel boiler 1 through the oil chamber temperature sensor wiring harness to control the working status of the fuel boiler 1.

[0045] The oil-fired boiler serves as the heat source for engine preheating and the cab heating system. Either a gasoline-powered or diesel-powered oil-fired boiler can be used. Gasoline-powered boilers are unaffected by low ambient temperatures; their independent fuel supply system and regular refueling of the tank ensure normal operation. Diesel-powered boilers are more susceptible to ambient temperatures and can use low-grade diesel fuel (-35#, -50#) to ensure normal operation. They can also be equipped with an independent fuel supply system (meaning a separate fuel tank and fuel lines installed on the side frame of the mining truck engine) or draw fuel directly from the main fuel tank of the mining truck for combustion.

[0046] An application of a diesel vehicle engine preheating and cab heating system is disclosed, which is used to preheat the diesel vehicle engine and heat the cab of a diesel mining heavy-duty truck in high-altitude and cold-weather conditions, providing comprehensive low-temperature protection for equipment and personnel.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. 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 embodiments that can be understood by those skilled in the art.

Claims

1. A diesel vehicle engine preheating and cab heating system, characterized in that: It includes a water chamber preheating system and a cab heating system. The water chamber preheating system includes a fuel oil boiler, which serves as the heat source for the engine preheating and cab heating systems. The fuel oil boiler is connected to the engine water chamber through a water inlet pipe. A water pump is installed at the connection between the fuel oil boiler and the water inlet pipe. The fuel oil boiler is connected to the engine water chamber through a return water pipe and a short-connection water pipe. The cab heating system includes a cab heat exchanger and a heat exchanger inlet pipe connected to the inlet of the cab heat exchanger. The return water outlet of the cab heat exchanger is connected to the heat exchanger return water pipe. The other end of the heat exchanger return water pipe is connected to the engine water chamber. Cooling water heated by the fuel boiler is transported to the cab heat exchanger through the return water pipe, regulating valve, and heat exchanger inlet pipe. After heat dissipation, it is transported to the engine water chamber through the heat exchanger return water pipe. The cooling water circulating in the engine water chamber is drawn out by a water pump, heated, and then delivered in two ways: one way to the engine water chamber to preheat the engine block, and the other way to the cab heat exchanger to heat the cab, thus achieving the functions of preheating the engine block and heating the cab.

2. The diesel engine preheating and cab heating system according to claim 1, characterized in that: It also includes an oil chamber preheating system, which includes a guide pipe connected to the fuel boiler. The end of the guide pipe away from the fuel boiler is connected to the oil pan guide groove at the bottom of the engine oil chamber. An exhaust pipe is provided on one side of the oil pan guide groove.

3. The diesel engine preheating and cab heating system according to claim 2, characterized in that: The oil-fired boiler is connected to an oil inlet pipe, and an oil pump is installed at the connection between the oil-fired boiler and the oil inlet pipe. The other end of the oil inlet pipe is connected to an oil tank, and a return oil pipe is connected to the oil tank. The other end of the return oil pipe is connected to the oil-fired boiler. The oil pump supplies fuel from the oil tank to the fuel oil boiler through the oil inlet pipe. The remaining fuel is then transported back to the oil tank through the oil return pipe, thus realizing the oil supply function of the fuel oil boiler.

4. The diesel engine preheating and cab heating system according to claim 3, characterized in that: The heat exchanger inlet and outlet water pipes are connected to the regulating valve. One end of the short-connector water pipe is connected to the regulating valve, and the other end is connected to the heat exchanger outlet water pipe.

5. The diesel engine preheating and cab heating system according to claim 4, characterized in that: A water chamber temperature sensor is installed on the engine water chamber. The water chamber temperature sensor monitors the temperature of the cooling water in the engine water chamber, and the monitoring signal is transmitted to the fuel boiler through the water chamber temperature sensor wiring harness. An oil chamber temperature sensor is installed on the engine oil chamber. The oil chamber temperature sensor monitors the oil temperature in the engine oil chamber, and the monitoring signal is transmitted to the fuel boiler through the oil chamber temperature sensor wiring harness.

6. The diesel engine preheating and cab heating system according to claim 5, characterized in that: The power supply for the control of the fuel-fired boiler and the power supply for the heat exchanger in the cab are both supplied by the starting battery of the mining heavy-duty truck.

7. The diesel engine preheating and cab heating system according to claim 6, characterized in that: The regulating valve can be either a manual regulating valve or an electric regulating valve, and its main function is to distribute water flow.

8. The diesel engine preheating and cab heating system according to claim 7, characterized in that: The fuel-fired boiler serves as the heat source for the engine preheating and cab heating system. It is a diesel-fired fuel-fired boiler, and the fuel supply system of the fuel-fired boiler is independently set up or directly draws fuel from the main fuel tank of the mining heavy-duty truck for combustion in the fuel-fired boiler.

9. The diesel engine preheating and cab heating system according to claim 8, characterized in that: The oil pan guide channel is detachably connected to the lower part of the engine oil pan, and the inside of the oil pan guide channel is coated with anti-corrosion material and the outside is coated with heat insulation material. The oil pan guide channel is detachably connected to the lower part of the engine oil pan by bolts.

10. An application of the diesel vehicle engine preheating and cab heating system according to claim 9, characterized in that: Applying diesel engine preheating and cab heating systems to diesel mining heavy-duty trucks operating in high-altitude and cold conditions provides comprehensive low-temperature protection for equipment and personnel.

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