Oil-gas mixing structure of a diesel engine

Abstract

The present invention relates to the technical field of diesel engines, specifically to an oil-gas mixing structure of a diesel engine, including a crankshaft, on which a piston is rotatably connected; a combustion chamber, in which the end of the piston away from the crankshaft is slidably connected in the combustion chamber, and the combustion chamber is provided with an air inlet and an air outlet; a high-pressure fuel injection port, in which the high-pressure fuel injection port is fixedly connected above the combustion chamber, and an oil pipe is fixedly connected to the end of the high-pressure fuel injection port away from the combustion chamber; a heating module, in which the heating module is arranged on the oil pipe; a heat pipe, in which the heat pipe is fixedly connected to the outer wall of the combustion chamber; and a temperature control module, in which the temperature control module is arranged on the oil pipe. By arranging the heating module, the present invention can heat the diesel in the oil pipe when starting under low oil temperature, so that the oil temperature can be quickly increased, thereby increasing the starting speed of the diesel engine in cold weather and allowing the diesel engine to work quickly.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engines, in particular to an oil-gas mixing structure of a diesel engine. Background Art

[0002] A diesel engine is an internal combustion engine that uses diesel as fuel. A diesel engine is a compression ignition engine, and is often called a diesel engine after its main inventor, Diesel. When a diesel engine is working, the air in the diesel engine cylinder is compressed to a high degree due to the movement of the piston, reaching a high temperature of 500 to 700 degrees Celsius. The fuel is then sprayed into the high-temperature air in the form of a mist, mixed with the high-temperature air to form a combustible mixture, which automatically ignites and burns. The energy released during combustion acts on the top surface of the piston, pushing the piston and converting it into rotational mechanical work through the connecting rod and crankshaft.

[0003] The existing diesel engine's oil-gas mixing structure is that the starting device drives the crankshaft to rotate. After the crankshaft rotates, the piston slides back and forth in the combustion chamber. When the piston is below the combustion chamber, air is taken in through the air intake, and the piston squeezes the air in the combustion chamber to reach high pressure. The high-pressure fuel injection port sprays diesel, and the high-pressure flammable characteristics of diesel are used to ignite the diesel to obtain power.

[0004] However, in cold weather, the oil-gas mixture structure of existing diesel engines will make the diesel become viscous, making it difficult for the fuel injector to spray out, thus causing the diesel engine to be difficult to start. Existing diesel engines are equipped with a preheating device, the basic principle of which is to heat the air at the air intake or increase the temperature of the coolant to increase the temperature in the combustion chamber, but this method cannot directly heat the diesel, resulting in slow heating of the diesel and low heating efficiency.

[0005] Therefore, an oil-gas mixing structure of a diesel engine is proposed. Summary of the invention

[0006] The object of the present invention is to provide an oil-gas mixing structure of a diesel engine. By setting a heating module, the diesel in the oil pipe can be heated when starting under low oil temperature, so that the oil temperature can be quickly increased, the starting speed of the diesel engine in cold weather is increased, and the diesel engine can work quickly, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An oil-gas mixing structure of a diesel engine, comprising:

[0009] a crankshaft, on which a piston is rotatably connected;

[0010] A combustion chamber, wherein one end of the piston away from the crankshaft is slidably connected in the combustion chamber, and the combustion chamber is provided with an air inlet and an air outlet;

[0011] A high-pressure fuel injection port, wherein the high-pressure fuel injection port is fixedly connected above the combustion chamber, and an end of the high-pressure fuel injection port away from the combustion chamber is fixedly connected to an oil pipe;

[0012] Also includes:

[0013] A heating module, wherein the heating module is arranged on the oil pipe;

[0014] A heat conducting pipe, wherein the heat conducting pipe is fixedly connected to the outer wall of the combustion chamber;

[0015] A temperature control module is arranged on the oil pipe.

[0016] Preferably, the heating module comprises a heating chamber, the heating chamber is fixedly connected to the oil pipe, the heating chamber adopts a double-wall structure, and the gap between the inner wall and the outer wall is vacuum-treated.

[0017] Preferably, the inner wall of the heating chamber is made of stainless steel.

[0018] Preferably, a heating wire is fixedly connected in the heating chamber, the heating wire is arranged in a spiral shape, and the heating wire is a nickel-chromium alloy heating wire.

[0019] Preferably, a heat-conducting wire is fixedly connected to the heating wire, the other end of the heat-conducting wire is connected to the high-pressure oil injection port along the oil pipe, and the heat-conducting wire is arranged in a spiral shape.

[0020] Preferably, the heat pipe is wound around the outer wall of the combustion chamber, one end of the heat pipe extends to the oil pipe and is wound around the oil pipe, the heat pipe is provided with a broken groove between the combustion chamber and the oil pipe, and an interruption structure is provided at the broken groove.

[0021] Preferably, the interruption structure includes a sliding block, which is slidably connected to the heat pipe, one end of the sliding block is fixedly connected to a magnet, the heat pipe is fixedly installed with an electromagnet near the magnet, and the end of the sliding block away from the magnet is fixedly connected to a spring.

[0022] Preferably, a protective cover is provided outside the interruption structure, the protective cover is fixedly connected to the heat conducting pipe, the protective cover wraps the interruption structure, and one end of the spring away from the sliding block is fixedly connected to the inner wall of the protective cover.

[0023] Preferably, a separation groove is provided at one end of the protective cover away from the electromagnet, the separation groove separates the oil pipe and the protective cover, and heat insulation cotton is fixedly installed in the separation groove.

[0024] Preferably, the temperature control module includes a temperature control box, which is fixedly mounted on the oil pipe below the heating module. Piezoelectric ceramics are fixedly connected inside the temperature control box, and the piezoelectric ceramics are electrically connected to the electromagnet. An expansion airbag is provided inside the temperature control box, and the expansion airbag is fixedly connected to the oil pipe.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Compared with the traditional technical solutions, the oil-gas mixing structure of a diesel engine described in the present invention can heat the diesel in the oil pipe when starting under low oil temperature by setting a heating module, so that the oil temperature can be quickly increased, the starting speed of the diesel engine in cold weather is increased, and the diesel engine can work quickly.

[0027] 2. The oil-gas mixing structure of a diesel engine described in the present invention can transfer part of the heat generated in the combustion chamber to the oil pipe by setting a heat pipe, so as to preheat the diesel and reduce the burden of the heating module, so that the temperature of the diesel entering the high-pressure fuel injection port is maintained within a normal range.

[0028] 3. The oil-gas mixing structure of a diesel engine described in the present invention interrupts the heat conduction of the heat pipe and the heating of the heating wire when the oil temperature is too high by setting a temperature control module and an interruption structure, thereby avoiding damage to the oil pipe caused by excessive oil temperature. After the oil temperature returns to normal, the heating wire and the heat pipe are restored so that the heating wire and the heat pipe can work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2 is a side view of the present invention;

[0031] Figure 3 for Figure 2 A magnified view at point A;

[0032] Figure 4 It is a front view and a partial cross-sectional view of the present invention;

[0033] Figure 5 for Figure 4 Enlarged view at B;

[0034] Figure 6 for Figure 5 Enlarged view at C.

[0035] In the figure: 1. crankshaft; 2. piston; 3. combustion chamber; 301. air inlet; 302. air outlet; 4. high-pressure fuel injection port; 5. oil pipe; 6. heating module; 7. heat pipe; 8. temperature control module; 601. heating chamber; 602. heating wire; 603. heat conducting wire; 604. broken groove; 605. interruption structure; 6051. sliding block; 6052. magnet; 6053. electromagnet; 6054. spring; 606. protective cover; 6061. partition groove; 6062. thermal insulation cotton; 801. temperature control box; 802. piezoelectric ceramic; 803. expansion airbag. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods:

[0037] An oil-gas mixing structure of a diesel engine, comprising:

[0038] A crankshaft 1, to which a piston 2 is rotatably connected;

[0039] A combustion chamber 3, wherein one end of the piston 2 away from the crankshaft 1 is slidably connected in the combustion chamber 3, and the combustion chamber 3 is provided with an air inlet 301 and an air outlet 302;

[0040] A high-pressure fuel injection port 4 is fixedly connected above the combustion chamber 3, and an end of the high-pressure fuel injection port 4 away from the combustion chamber 3 is fixedly connected to an oil pipe 5;

[0041] Also includes:

[0042] A heating module 6, wherein the heating module 6 is arranged on the oil pipe 5;

[0043] A heat conducting pipe 7, the heat conducting pipe 7 is fixedly connected to the outer wall of the combustion chamber 3;

[0044] The temperature control module 8 is arranged on the oil pipe 5 .

[0045] The existing oil-gas mixing structure of the diesel engine is that the starting device drives the rotation of the crankshaft 1. After the crankshaft 1 rotates, the piston 2 slides and reciprocates in the combustion chamber 3. When the piston 2 is below the combustion chamber 3, the air is taken in through the air inlet 301, and the piston 2 squeezes the air in the combustion chamber 3 to reach high pressure. The high-pressure fuel injection port 4 sprays the diesel, and the high-pressure flammable property of the diesel is used to ignite the diesel to obtain power. In the existing diesel engine oil-gas mixing structure, in cold weather, the diesel will become viscous, making it difficult to spray out of the high-pressure fuel injection port 4, thereby making it difficult to start the diesel engine. Therefore, a heating module 6 is provided to heat the diesel in the oil pipe 5 during startup, and a heat pipe 7 is provided to transfer part of the heat generated in the combustion chamber 3 to the oil pipe 5 to preheat the diesel to reduce the burden of the heating module 6. A temperature control module 8 is provided to interrupt the heat conduction of the heat pipe 7 when the oil temperature is too high to prevent the oil pipe 5 from being damaged by excessive oil temperature.

[0046] As an embodiment of the present invention, refer to Figure 5 The heating module 6 includes a heating chamber 601, which is fixedly connected to the oil pipe 5. The heating chamber 601 adopts a double-wall structure, and the gap between the inner wall and the outer wall is vacuum-treated.

[0047] The inner wall of the heating chamber 601 adopts a structure similar to the inner wall of a thermos cup, with two layers of inner walls and a vacuum in the middle gap, which can effectively improve the insulation effect. When the diesel engine is turned off, the residual heat in the heating chamber 601 maintains the temperature of the diesel as much as possible, delaying the time for the oil temperature to drop, so that the diesel engine can start quickly within a period of time.

[0048] As an embodiment of the present invention, refer to Figure 5 The inner wall of the heating chamber 601 is made of stainless steel.

[0049] In this embodiment, in order to extend the oil temperature drop time as much as possible, the inner wall of the heating chamber 601 is made of stainless steel. Stainless steel is corrosion-resistant and not easy to rust. It can better maintain the oil temperature and will not be easily corroded and oxidized by diesel.

[0050] As an embodiment of the present invention, refer to Figure 5 A heating wire 602 is fixedly connected in the heating chamber 601 . The heating wire 602 is arranged in a spiral shape and is made of a nickel-chromium alloy heating wire.

[0051] The heating wire 602 is activated when the power is turned on, and is used to increase the oil temperature in the heating chamber 601. The spiral arrangement of the heating wire 602 can evenly transfer heat to the entire heating chamber 601, thereby improving the heating efficiency. The advantages of the nickel-chromium alloy heating wire are high strength in a high temperature environment, and it is not easy to deform or change the structure during long-term high temperature operation. The nickel-chromium alloy electric heating tube has good plasticity at room temperature, and it is relatively simple to repair it after deformation. In addition, the nickel-chromium alloy heating wire has high emissivity, is non-magnetic, has good corrosion resistance, and has a long service life.

[0052] As an embodiment of the present invention, refer to Figure 5 A heat-conducting wire 603 is fixedly connected to the heating wire 602 , and the other end of the heat-conducting wire 603 is connected to the high-pressure oil injection port 4 along the oil pipe 5 , and the heat-conducting wire 603 is arranged in a spiral shape.

[0053] The heat conducting wire 603 is made of memory alloy metal, and the heating wire 602 is intermittently heated. The memory alloy with a two-way effect will repeatedly deform and reset during the temperature change process, which plays a stirring role, stirring the viscous diesel and accelerating heat transfer. When the heating module 6 is heated, the heating rate of the oil pipe 5 between the heating chamber 601 and the combustion chamber 3 is slow. In order to increase the heating rate, the heat conducting wire 603 is set. The heat conducting wire 603 can transfer the heat of the heating wire 602 to the oil pipe 5, so that the oil temperature in the oil pipe 5 rises rapidly. The heat conducting wire 603 is arranged in a spiral shape, which can evenly transfer heat to the oil pipe 5, thereby further increasing the oil temperature heating rate.

[0054] As an embodiment of the present invention, refer to Figure 1-5 The heat pipe 7 is wound around the outer wall of the combustion chamber 3, one end of the heat pipe 7 extends to the oil pipe 5 and is wound around the oil pipe 5, a broken groove 604 is provided on the heat pipe 7 between the combustion chamber 3 and the oil pipe 5, and an interruption structure 605 is provided at the broken groove 604.

[0055] The heat pipe 7 is provided to transfer part of the heat generated in the combustion chamber 3 to the oil pipe 5, and preheat the diesel to reduce the burden of the heating module 6. Due to the cold weather, the oil temperature rises slowly from the oil tank to the heating module 6 during a period of startup, resulting in a continuous flow of low-temperature oil into the heating chamber 601. If the throttle is increased, the flow rate of the oil is fast, and the oil temperature may not rise before entering the high-pressure injection port 4, which reduces the injection efficiency of the high-pressure injection port 4. The low-temperature viscous diesel is inefficient in mixing with gas and is prone to incomplete combustion, which not only reduces the power and economy of the diesel engine, but also a part of the unburned diesel flows down along the inner wall of the combustion chamber 3 to the crankshaft 1, and the oil film on the inner wall of the combustion chamber 3 is diluted, and the engine oil in the crankshaft 1 box is diluted, which affects the engine oil properties to a certain extent, thereby further increasing the wear of the diesel engine; the interruption structure 605 is used to interrupt the heat conduction of the heat pipe 7 when the oil temperature is too high, so as to avoid damage to the oil pipe 5 caused by excessive oil temperature.

[0056] As an embodiment of the present invention, refer to Figure 2-3 The interruption structure 605 includes a sliding block 6051, which is slidably connected to the heat pipe 7, one end of the sliding block 6051 is fixedly connected to a magnet 6052, an electromagnet 6053 is fixedly installed on the heat pipe 7 near the magnet 6052, and the end of the sliding block 6051 away from the magnet 6052 is fixedly connected to a spring 6054.

[0057] Under normal circumstances, the sliding block 6051 is simultaneously mounted on both ends of the broken groove 604, and the sliding block 6051 can transfer heat from one end to the other end. When the oil temperature is too high, the electromagnet 6053 is started, and the sliding block 6051 will be driven by the magnet 6052 to move toward the electromagnet 6053, so that the sliding block 6051 is disconnected from the end of the broken groove 604 close to the oil pipe 5, so that heat cannot be transmitted to the oil pipe 5, thereby preventing the oil temperature from being too high and causing damage to the oil pipe 5. When the oil temperature drops, the electromagnet 6053 is powered off, and the sliding block 6051 will be restored under the action of the spring 6054, so that the sliding block 6051 is again mounted on both ends of the broken groove 604 at the same time, and the heat generated by the combustion chamber 3 can be transmitted to the oil pipe 5 through the sliding block 6051 again.

[0058] As an embodiment of the present invention, refer to Figure 2-3 A protective cover 606 is provided outside the interruption structure 605 , and the protective cover 606 is fixedly connected to the heat pipe 7 . The protective cover 606 wraps the interruption structure 605 , and one end of the spring 6054 away from the sliding block 6051 is fixedly connected to the inner wall of the protective cover 606 .

[0059] The protective cover 606 is used to prevent impurities from entering the interruption structure 605 . The protective cover 606 can be provided to prevent foreign objects from entering the interruption structure 605 and affecting the normal operation of the interruption structure 605 .

[0060] As an embodiment of the present invention, refer to Figure 3 A separation groove 6061 is formed at one end of the protective cover 606 away from the electromagnet 6053 , and the separation groove 6061 separates the heat pipe 7 and the protective cover 606 , and a heat insulation cotton 6062 is fixedly installed in the separation groove 6061 .

[0061] The separation groove 6061 and the heat-insulating cotton 6062 are provided to prevent the heat generated by the combustion chamber 3 from being transmitted to the oil pipe 5 through the protective cover 606, causing the interruption structure 605 to fail. The heat-insulating cotton 6062 has the characteristics of high temperature resistance, non-flammability, and low thermal conductivity. It can effectively block the heat transfer between the protective cover and the heat pipe 7.

[0062] As an embodiment of the present invention, refer to Figure 6 The temperature control module 8 includes a temperature control box 801, which is fixedly installed on the oil pipe 5 below the heating module 6. A piezoelectric ceramic 802 is fixedly connected to the temperature control box 801, and the piezoelectric ceramic 802 is electrically connected to the electromagnet 6053. An expansion airbag 803 is arranged in the temperature control box 801, and the expansion airbag 803 is fixedly connected to the oil pipe 5.

[0063] In this embodiment, excessive oil temperature may cause damage to the oil pipe 5, so a temperature control module 8 is provided. The expansion airbag 803 contains a gas that is easily expanded when heated, such as carbon dioxide. The airbag has elasticity, and the heated gas expands and is easily deformed under the action of air pressure. When the oil temperature in the oil pipe 5 is too high, the expansion airbag 803 will expand when heated. When the piezoelectric ceramic 802 is squeezed, the piezoelectric ceramic 802 generates an electrical signal, and the heating wire 602 is powered off, so that the heating of the heating chamber 601 stops, and the heat is maintained by the residual heat. The electromagnet 6053 is started, and the sliding block 6051 is driven by the magnet 606. 052 moves toward the electromagnet 6053, thereby disconnecting the sliding block 6051 from one end of the broken groove 604, so that the heat cannot be transmitted to the oil pipe 5; when the expansion airbag 803 is restored, the piezoelectric ceramic 802 is powered off, the heating wire 602 is started, the heating chamber 601 continues to heat, the electromagnet 6053 is powered off, and the sliding block 6051 is restored under the action of the spring 6054, so that the sliding block 6051 is simultaneously mounted on both ends of the broken groove 604, and the heat generated by the combustion chamber 3 can be transmitted to the oil pipe 5 through the sliding block 6051 again.

[0064] Working principle: Turn on the power, the heating wire 602 in the heating module 6 heats up, and the low-temperature diesel in the heating chamber 601 is raised. The heat-conducting wire 603 transfers the heat of the heating wire 602 to the oil pipe 5, so that the oil temperature in the oil pipe 5 can be rapidly raised. When the oil temperature rises to a normal state, the engine can operate normally. When the engine is running, the heat generated in the combustion chamber 3 will be transferred back to the oil pipe 5 through the heat-conducting pipe 7 to reduce the burden of the heating module 6, and to maintain the diesel temperature to prevent incomplete combustion. When the oil temperature is too high, the heating wire 602 is powered off, the interruption structure 605 disconnects the heat-conducting pipe 7, the heating chamber 601 stops heating, and the heat-conducting pipe 7 stops conducting heat. When the oil temperature recovers, the heating wire 602 resumes power supply. The interruption structure 605 is restored, and the heat-conducting pipe 7 transmits heat again.

[0065] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An oil-gas mixing structure of a diesel engine, comprising: A crankshaft (1), to which a piston (2) is rotatably connected; A combustion chamber (3), wherein one end of the piston (2) away from the crankshaft (1) is slidably connected in the combustion chamber (3), and the combustion chamber (3) is provided with an air inlet (301) and an air outlet (302); a high-pressure fuel injection port (4), wherein the high-pressure fuel injection port (4) is fixedly connected above the combustion chamber (3), and one end of the high-pressure fuel injection port (4) away from the combustion chamber (3) is fixedly connected to an oil pipe (5); characterized in that: it also includes: a heating module (6), wherein the heating module (6) is arranged on the oil pipe (5); a heat pipe (7), wherein the heat pipe (7) is fixedly connected to the outer wall of the combustion chamber (3); and a temperature control module (8), wherein the temperature control module (8) is arranged on the oil pipe (5); The heating module (6) comprises a heating chamber (601), the heating chamber (601) is fixedly connected to the oil pipe (5), the heating chamber (601) adopts a double-wall structure, and the gap between the inner wall and the outer wall is vacuum-treated; The inner wall of the heating chamber (601) is made of stainless steel; A heating wire (602) is fixedly connected in the heating chamber (601), the heating wire (602) is arranged in a spiral shape, and the heating wire (602) is a nickel-chromium alloy heating wire (602); A heat-conducting wire (603) is fixedly connected to the heating wire (602), the other end of the heat-conducting wire (603) is connected to the high-pressure oil injection port (4) along the oil pipe (5), and the heat-conducting wire (603) is arranged in a spiral shape; The heat conducting wire (603) is made of memory alloy metal, and the heating wire (602) is intermittently heated. The memory alloy with a two-way effect will repeatedly deform and reset during the temperature change process. The heat conducting pipe (7) is wound around the outer wall of the combustion chamber (3), one end of the heat conducting pipe (7) extends to the oil pipe (5) and is wound around the oil pipe (5), the heat conducting pipe (7) is provided with a broken groove (604) between the combustion chamber (3) and the oil pipe (5), and an interruption structure (605) is provided at the broken groove (604); The interruption structure (605) comprises a sliding block (6051), the sliding block (6051) is slidably connected to the heat conducting pipe (7), one end of the sliding block (6051) is fixedly connected to a magnet (6052), the heat conducting pipe (7) is fixedly installed with an electromagnet (6053) near the magnet (6052), and one end of the sliding block (6051) away from the magnet (6052) is fixedly connected to a spring (6054); The interruption structure (605) is provided with a protective cover (606) outside, the protective cover (606) is fixedly connected to the heat conducting pipe (7), the protective cover (606) wraps the interruption structure (605), and the end of the spring (6054) away from the sliding block (6051) is fixedly connected to the inner wall of the protective cover (606); A separation groove (6061) is provided at one end of the protective cover (606) away from the electromagnet (6053), the separation groove (6061) separates the oil pipe (5) and the protective cover (606), and a heat insulation cotton (6062) is fixedly installed in the separation groove (6061); The temperature control module (8) comprises a temperature control box (801), which is fixedly mounted on the oil pipe (5) below the heating module (6). A piezoelectric ceramic (802) is fixedly connected inside the temperature control box (801), and the piezoelectric ceramic (802) is electrically connected to the electromagnet (6053). An expansion airbag (803) is arranged inside the temperature control box (801), and the expansion airbag (803) is fixedly connected to the oil pipe (5).

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