Engine ignition system for plateau environment and engine

Abstract

The invention relates to the technical field of engines, and particularly provides an engine ignition system for a plateau environment and an engine, and the engine ignition system comprises an oil supply device, a heating device and a first temperature sensor. The heating device is suitable for containing and heating fuel oil from the oil supply device. The first temperature sensor is suitable for detecting a first temperature value of the temperature of fuel oil in the heating device, and the heating device is configured to heat the fuel oil with first power in response to the fact that the first temperature value is larger than a first preset temperature and smaller than or equal to a second preset temperature. And in response to the fact that the first temperature value is larger than the second preset temperature, heating is conducted with second power.

Description

Technical Field

[0001] At least one embodiment of the present invention relates to the field of engine technology, and more specifically, to an engine ignition system and an engine for use in a plateau environment. Background Art

[0002] As a traditional internal combustion engine, the diesel engine has occupied an important position in various types of transportation and construction machinery since its advent with its high efficiency, durability and good fuel economy.

[0003] With the continuous advancement of science and technology, diesel engine technology has made significant progress in the following aspects: (1) High-pressure common rail fuel injection technology is one of the core technologies of modern diesel engines. This technology increases the fuel injection pressure, making the fuel atomization more uniform and the combustion more complete, thereby reducing fuel consumption and emission pollution. (2) Turbocharging technology uses the exhaust gas emitted by the engine to drive the turbocharger to increase the intake pressure, so that the engine has higher power output at the same displacement, has better low-speed torque characteristics, is suitable for heavy-load conditions, and helps to reduce the size and weight of the engine. (3) Exhaust after-treatment technology, mainly including selective catalytic reduction (SCR), nitrogen oxide storage reduction (NSR) and particulate matter filter (DPF) and other technologies. These technologies can effectively reduce nitrogen oxides (NOx) and particulate matter (PM) emitted by diesel engines and improve environmental quality.

[0004] In the related technology, diesel engines are widely used in large-scale engineering machinery, such as engineering vehicles working in harsh environmental conditions, because of their advantages of high efficiency, durability, low speed and high torque output. Especially in plateau areas, the oxygen is relatively thin and the temperature is low, which leads to increased viscosity of engine oil and diesel, low intake temperature and diesel temperature, which seriously affects the cold start of diesel engines and shortens their service life. In addition, during the operation process after starting, it still takes a long time to reach the optimal operating temperature, which also affects fuel economy. Therefore, how to improve the adaptability of diesel engines under plateau conditions and improve work efficiency has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of the above problems, the present invention provides an engine ignition system and an engine for use in a plateau environment, which can improve the cold start stability of the engine in a plateau environment and shorten the cold start time.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an engine ignition system for use in a plateau environment, comprising: a fuel supply device; a heating device, suitable for accommodating and heating the fuel from the above-mentioned fuel supply device; a first temperature sensor, suitable for detecting a first temperature value of the fuel temperature in the above-mentioned heating device, and the above-mentioned heating device is configured to: in response to the above-mentioned first temperature value being greater than a first preset temperature and less than or equal to a second preset temperature, heat with a first power; in response to the above-mentioned first temperature value being greater than a second preset temperature, heat with a second power.

[0007] In an illustrative embodiment, the heating device is further configured to: in response to the first temperature value being greater than the second preset temperature and less than or equal to the third preset temperature, heat at a second power; in response to the first temperature value being greater than the third preset temperature, stop heating.

[0008] In an illustrative embodiment, the fuel supply device includes: a fuel tank, adapted to contain fuel; and a fuel common rail mechanism, adapted to extract fuel from the fuel tank and deliver it to the heating device.

[0009] In an illustrative embodiment, a second temperature sensor is further included, which is adapted to detect a second temperature value of the fuel temperature in the fuel tank.

[0010] In an illustrative embodiment, a fuel tank heating device is further included, which is suitable for preheating the fuel in the above-mentioned fuel tank.

[0011] In an illustrative embodiment, the fuel tank heating device is configured as follows:

[0012] In response to the second temperature value being less than or equal to the first preset temperature, heating is performed at a third power;

[0013] In response to the second temperature value being greater than the first preset temperature and less than or equal to the second preset temperature, heating is performed at the first power;

[0014] In response to the second temperature value being greater than the second preset temperature, heating is stopped.

[0015] In an exemplary embodiment, the fuel common rail mechanism is configured to extract fuel from the fuel tank in response to the second temperature value being greater than a first preset temperature.

[0016] In an illustrative embodiment, it also includes a fuel injection nozzle, which is connected to the above-mentioned heating device through a fuel supply pipeline and is suitable for injecting heated fuel.

[0017] In an illustrative embodiment, the outside of the fuel supply pipeline between the heating device and the fuel injector is coated with a heating resistance wire.

[0018] The present invention also provides an engine, comprising an engine ignition system as in any of the above embodiments; a cylinder body, wherein a combustion chamber is defined inside the cylinder body, and an injector of the engine ignition system is arranged on the top of the cylinder body to inject fuel into the combustion chamber.

[0019] The engine ignition system for plateau environments provided by the present invention monitors the fuel temperature in the heating device in real time through a first temperature sensor, configures corresponding heating power to heat the fuel according to different temperature intervals of the first temperature value, and sprays the fuel for combustion after heating, which can shorten the cold start time of the engine and effectively improve the cold start stability of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0021] Figure 1 The present invention provides an engine ignition system and an engine schematic diagram for use in a plateau environment.

[0022] In the above drawings, the meanings of the reference numerals are as follows:

[0023] 1. Oil supply device;

[0024] 11. Fuel tank;

[0025] 12. Fuel common rail mechanism;

[0026] 2. Heating device;

[0027] 21. Main body;

[0028] 22. Control department;

[0029] 3. A first temperature sensor;

[0030] 4. Fuel injection nozzle;

[0031] 5. Second temperature sensor;

[0032] 6. Cylinder body;

[0033] 7. Piston;

[0034] 8. Air intake;

[0035] 9. Exhaust duct. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. The terms used herein are only for describing specific embodiments and are not intended to limit the present invention.

[0037] The terms "include", "comprising", etc. used herein indicate the presence of the features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components. All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0038] In this document, unless otherwise specified, directional terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device, element or component referred to must have a specific orientation, be constructed or operate in a specific orientation. It should be understood that when the absolute position of the described object changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms should not be understood as limiting the present invention.

[0039] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.

[0040] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0041] Figure 1The present invention provides an engine ignition system and an engine schematic diagram for use in a plateau environment.

[0042] The plateau environment is harsh, mainly characterized by low atmospheric pressure, low oxygen content and low ambient temperature. Under such conditions, the engines of construction machinery have difficulty starting. Specifically, in areas around 3,000 meters above sea level, the average temperature is about -4℃-0℃; in areas above 4,000 meters above sea level, the average temperature may be lower than -8℃. The diesel engines of construction machinery, which use No. 0 diesel, may wax when the temperature drops to -5℃ to -10℃, which in turn affects the normal starting of the engine.

[0043] Exemplary embodiments of the present invention provide an engine ignition system for a high altitude environment, such as Figure 1 As shown, it includes a fuel supply device 1, a heating device 2 and a first temperature sensor 3. The heating device 2 is suitable for accommodating and heating the fuel from the fuel supply device 1. The first temperature sensor 3 is suitable for detecting a first temperature value of the fuel temperature in the heating device 2. The heating device 2 is configured to heat the fuel at a first power in response to the first temperature value being greater than a first preset temperature and less than or equal to a second preset temperature. And, in response to the first temperature value being greater than a second preset temperature, heating is performed at a second power.

[0044] In such an implementation, the fuel temperature in the heating device 2 is monitored in real time by the first temperature sensor 3, and the corresponding heating power is configured to heat the fuel according to the different temperature intervals of the first temperature value, and the fuel is sprayed out for combustion after heating, which can shorten the cold start time of the engine and effectively improve the cold start stability of the engine.

[0045] For example, according to the plateau environmental conditions under normal circumstances, the first preset temperature is set to -10°C, and the second preset temperature is set to 0°C. When the first temperature sensor 3 detects that the fuel temperature in the heating device 2 is between -10°C and 0°C, the heating device 2 heats the fuel at the first power. In this embodiment, the first power is set to 20kw. When the first temperature sensor 3 detects that the fuel temperature in the heating device 2 is greater than 0°C, the heating device 2 heats the fuel at the second power. In this embodiment, the second power is set to 10kw.

[0046] In an exemplary embodiment, the heating device 2 is further configured to, in response to the first temperature value being greater than the second preset temperature and less than or equal to the third preset temperature, perform heating at the second power, and, in response to the first temperature value being greater than the third preset temperature, stop heating.

[0047] In such an embodiment, a third preset temperature is also set, and when the first temperature value, that is, the fuel temperature, is between the second preset temperature and the third preset temperature, the second power is used for heating. When the fuel temperature in the heating device 2, that is, the first temperature value, exceeds the third preset temperature, the heating device 2 stops heating the fuel.

[0048] Exemplarily, the third preset temperature is set to 20° C. When the fuel reaches 20° C., the engine has basically entered a stable operating state. At this time, the fuel heating is stopped to reduce energy consumption.

[0049] In some other embodiments, such as Figure 1 As shown, the heating device 2 includes a main body 21 and a control unit 22 . The main body 21 is suitable for containing fuel and directly heating the fuel. The control unit 22 is used to receive feedback information (such as instructions issued by the ECU) and adjust the heating power of the main body 21 .

[0050] In an exemplary embodiment, the fuel supply device 1 includes a fuel tank 11 for containing fuel and a fuel common rail mechanism 12 . The fuel common rail mechanism 12 is suitable for extracting fuel from the fuel tank 11 and delivering it to the heating device 2 .

[0051] In such an embodiment, the fuel common rail mechanism 12 is connected to the fuel tank 11 and the heating device 2 respectively through the fuel supply pipeline, and the fuel common rail mechanism 12 can maintain a relatively high injection pressure to improve the combustion efficiency.

[0052] In some other embodiments, an oil pump and a fuel consumption meter are further provided between the fuel common rail mechanism 12 and the fuel tank 11, which are suitable for monitoring the fuel consumption while extracting the fuel.

[0053] According to an embodiment of the present disclosure, the engine ignition system further includes a second temperature sensor 5 adapted to detect a second temperature value of the fuel temperature in the fuel tank 11 .

[0054] In such an implementation, since the ambient temperature of the plateau is relatively low, the second temperature sensor 5 is used to monitor the temperature of the fuel in the fuel tank 11, so that timely measures can be taken to avoid the phenomenon of waxing of the fuel.

[0055] According to an embodiment of the present disclosure, a fuel tank heating device is also included, which is suitable for preheating the fuel in the fuel tank 11.

[0056] In such an embodiment, the fuel tank heating device can be independently turned on and off, for example, using a vehicle battery or an external power supply. Before starting the engine, the fuel tank heating device is first started to preheat the fuel in the fuel tank 11 to avoid problems such as blockage of the fuel supply pipeline.

[0057] According to an embodiment of the present disclosure, the fuel tank heating device is configured to perform heating at a third power in response to the second temperature value being less than or equal to the first preset temperature, and to perform heating at a first power in response to the second temperature value being greater than the first preset temperature and less than or equal to the second preset temperature, and to stop heating in response to the second temperature value being greater than the second preset temperature.

[0058] In such an implementation, according to the different temperature intervals where the second temperature value is located, the corresponding heating power is configured to heat the fuel, and then in conjunction with the heating device 2, the cold start time of the engine is further shortened and the cold start stability of the engine is improved.

[0059] Exemplarily, the third power is greater than the first power. When the second temperature value is less than or equal to the first preset temperature, such as -10°C in the above embodiment, a power higher than 20kw is set for heating. In this embodiment, the third power is set to 30kw. Since the diesel may have waxed at around -10°C, a higher heating power is configured to restore the diesel to a normal state as soon as possible. When the second temperature value is between the first preset temperature and the second preset temperature, that is, greater than -10°C and less than or equal to 0°C, the first power, such as 20kw, is also used for heating. When the second temperature value is greater than the second preset temperature, that is, greater than 0°C, the fuel tank heating device no longer heats. When the diesel temperature is greater than 0°C, the secondary heating of the heating device 2 can meet the engine operation requirements. Since the amount of oil stored in the fuel tank 11 is large, it is less economical to continue heating the fuel in the fuel tank 11. Therefore, stopping heating or switching to the insulation mode is conducive to cost saving.

[0060] According to an embodiment of the present disclosure, the fuel common rail mechanism 12 is configured to draw fuel from the fuel tank 11 in response to the second temperature value being greater than the first preset temperature.

[0061] In such an embodiment, after the fuel in the fuel tank 11 is heated to a temperature greater than a first preset temperature, the fuel common rail mechanism 12 draws fuel therefrom and transports it to the heating device 2. The first preset temperature includes but is not limited to -10°C in the aforementioned embodiment. By preheating the fuel in the fuel tank 11 before drawing it, it is possible to avoid accidental start-up of the fuel common rail 12 and causing damage when the diesel in the fuel tank 11 has been waxed.

[0062] In an exemplary embodiment, the engine ignition system further comprises a fuel injector 4 connected to the heating device 2 via a fuel supply pipeline and adapted to inject heated fuel.

[0063] According to an embodiment of the present disclosure, the outside of the oil supply pipeline between the heating device 2 and the fuel injector 4 is coated with a heating resistance wire.

[0064] In such an embodiment, the heat generated by energizing the heating resistor wire is used to achieve a heat preservation effect on the fuel supply pipeline, thereby preventing the fuel from losing heat and causing the temperature to drop during the process of flowing from the heating device 2 to the fuel injector 4.

[0065] An embodiment of the present disclosure also provides an engine, comprising an engine ignition system and a cylinder body 6 in any of the above embodiments, wherein a combustion chamber is defined inside the cylinder body 6, and an injector 4 of the engine ignition system is arranged at the top of the cylinder body 6 to inject fuel into the combustion chamber.

[0066] According to the embodiment of the present disclosure, the piston 7, the intake passage 8 and the exhaust passage 9 are further included. The piston 7 is arranged in the cylinder body 6 and reciprocates along the axial direction of the cylinder body 6. The top of the piston 7 and the cylinder body 6 define a combustion chamber for the fuel to be ignited or compressed. The intake passage 8 is arranged on one side of the top of the cylinder body 6 and communicates with the combustion chamber for fresh air to enter. The exhaust passage 9 is arranged on the other side of the top 6 of the cylinder body 6 and communicates with the combustion chamber for exhaust gas after combustion.

[0067] The working process of the engine provided by the present disclosure is as follows: the piston 7 moves downward from the top dead center, the intake passage 8 opens, the exhaust passage 9 closes, and the air enters the combustion chamber from the intake passage 7. When the piston 7 passes the bottom dead center, the intake passage 8 closes, and the piston 7 moves upward to compress the air in the cylinder 6, so that the temperature and pressure in the combustion chamber continue to rise. At this time, the fuel in the fuel tank 11 passes through the oil pump and the fuel consumption meter, and then passes through the fuel common rail mechanism 12 to the main body 21 of the heating device 2. The heating device 2 feeds back the first temperature value to the ECU through the first temperature sensor 3, and the ECU sends the matching power information to the control unit 22, and then the control unit 22 controls the main body 21 to adjust to ensure that the fuel reaches the fuel injector 4 after being heated, and the temperature rise improves the atomization effect and the engine ignition performance. After the oil-gas mixture in the combustion chamber is compressed and ignited, the energy is released to push the piston 7 downward to output mechanical work. When the piston 7 approaches the bottom dead center, the exhaust passage 9 opens, and the piston 7 moves upward to discharge the exhaust gas in the cylinder 6, completing the entire working process.

[0068] In some other exemplary embodiments, the ECU can also adjust the intake volume when the engine is started by controlling the opening of the intake valve of the intake duct 8, so that the oil and gas synergy can be reasonably matched under the plateau environment, and the air-fuel ratio of the engine can be maintained within the optimal range to promote the formation of the mixture and improve the ignition performance of the mixture, so as to effectively improve the cold start stability of the engine under the plateau environment.

[0069] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. An engine ignition system for plateau environment, characterized in that: include: Oil supply device (1); A heating device (2) adapted to receive and heat the fuel from the fuel supply device (1); The first temperature sensor (3) is adapted to detect a first temperature value of the fuel temperature in the heating device (2), wherein the heating device (2) is configured as follows: In response to the first temperature value being greater than a first preset temperature and less than or equal to a second preset temperature, heating is performed at a first power; In response to the first temperature value being greater than a second preset temperature, heating is performed at a second power.

2. The engine ignition system according to claim 1, characterized in that: The heating device (2) is also configured as follows: In response to the first temperature value being greater than a second preset temperature and less than or equal to a third preset temperature, heating is performed at a second power; In response to the first temperature value being greater than a third preset temperature, heating is stopped.

3. The engine ignition system according to claim 2, characterized in that: The oil supply device (1) comprises: A fuel tank (11), adapted to contain fuel; The fuel common rail mechanism (12) is suitable for extracting fuel from the fuel tank (11) and delivering the fuel to the heating device (2).

4. The engine ignition system according to claim 3, characterized in that: It also includes a second temperature sensor (5) adapted to detect a second temperature value of the fuel temperature in the fuel tank (11).

5. The engine ignition system according to claim 4, characterized in that: It also includes a fuel tank heating device, which is suitable for preheating the fuel in the fuel tank (11).

6. The engine ignition system according to claim 5, characterized in that: The fuel tank heating device is configured as follows: In response to the second temperature value being less than or equal to the first preset temperature, heating at a third power; In response to the second temperature value being greater than the first preset temperature and less than or equal to the second preset temperature, heating is performed at the first power; In response to the second temperature value being greater than a second preset temperature, heating is stopped.

7. The engine ignition system according to claim 6, characterized in that: The fuel common rail mechanism (12) is configured to extract fuel from the fuel tank (11) in response to the second temperature value being greater than a first preset temperature.

8. The engine ignition system according to any one of claims 1 to 7, characterized in that: It also includes a fuel injection nozzle (4) connected to the heating device (2) via a fuel supply pipeline and suitable for injecting heated fuel.

9. The engine ignition system according to claim 8, characterized in that: The outside of the oil supply pipeline between the heating device (2) and the oil injection nozzle (4) is coated with a heating resistance wire.

10. An engine, characterized in that: include: The engine ignition system according to any one of claims 1 to 9; A cylinder body (6), wherein a combustion chamber is defined inside the cylinder body (6), and a fuel injection nozzle (4) of the engine ignition system is arranged at the top of the cylinder body (6) to inject fuel into the combustion chamber.

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