Engine crankcase ventilation anti-icing heating device

Abstract

This utility model provides an engine crankcase ventilation anti-icing heating device, belonging to the field of engine technology. It includes a heater connected between the gas inlet of the turbocharger and the air filter intake pipe, a first coolant passage passing through the engine block and cylinder head, and a second coolant passage passing through the turbocharger. The heater contains a gas flow channel and a liquid flow channel. The first cooling passage, inlet pipe, liquid flow channel, outlet pipe, second cooling passage, and water pump form a circulating coolant flow channel. One end of the gas flow channel is connected to the gas inlet of the turbocharger, and the other end is connected to the air filter intake pipe. A crankcase ventilation connecting pipe is connected to the outer wall of the heater, and the crankcase ventilation connecting pipe communicates with the gas flow channel. By mixing blow-by gas with cold air and ensuring complete combustion in the engine to meet engine environmental requirements, the coolant heats the heater to prevent water vapor generated after the blow-by gas comes into contact with the cold air from condensing into ice inside the pipe, thus protecting the engine's operational safety.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to an engine crankcase ventilation and anti-icing heating device. Background Technology

[0002] When an engine is running, some of the exhaust gas produced by fuel combustion in the combustion chamber leaks into the crankcase through the piston ring gaps. This is called crankcase blow-by. If blow-by is directly released into the atmosphere, it will cause air pollution. If the blow-by is not discharged in time, it will cause the crankcase pressure to rise, leading to failure of the engine's internal and external seals and oil leakage. In severe cases, a significant reduction in engine lubricating oil can endanger engine operating safety. Current environmental regulations require natural gas engines to use a closed-loop forced crankcase ventilation system. This means that crankcase blow-by is not allowed to be directly discharged into the atmosphere; it must be recirculated into the engine's intake system for combustion and then discharged with the exhaust. Simultaneously, the crankcase pressure should be lower than the current atmospheric pressure during engine operation. Based on these requirements, crankcase blow-by must be mixed with fresh air at the engine intake before entering the engine combustion chamber for re-combustion and discharge.

[0003] When the engine is used in the extremely cold conditions of northern winters, the hot air coming out of the crankcase outlet mixes with the cold air coming from the engine air filter intake at the front intake of the turbocharger. The alternation of hot and cold air will form a large amount of condensate. Some of this condensate will freeze and block the crankcase ventilation pipe at the intersection of the crankcase ventilation outlet and the intake pipe, endangering the safe operation of the engine. Utility Model Content

[0004] In view of the above problems, this utility model provides an engine crankcase ventilation and anti-icing heating device.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0006] A crankcase ventilation and anti-icing heating device for an engine is provided, comprising a heater connected between the gas inlet of the turbocharger and the air filter intake pipe, a first coolant passage passing through the engine block and cylinder head, and a second coolant passage passing through the turbocharger.

[0007] The heater is equipped with a gas flow channel. One end of the gas flow channel is connected to the gas inlet of the turbocharger and the other end is connected to the air filter intake pipe. The outer wall of the heater is connected to the crankcase ventilation connection pipe. The gas leaking in the crankcase ventilation connection pipe mixes with the cold air in the air filter intake pipe in the heater.

[0008] The heater is equipped with a liquid flow channel. The two ends of the liquid flow channel on the heater are connected to the inlet pipe and the outlet pipe, respectively. One end of the first coolant channel is connected to the inlet pipe, and one end of the second coolant channel is connected to the outlet pipe. The other end is connected to the first coolant channel through a water pump.

[0009] The gas in the gas flow channel of the heater exchanges heat with the mixed gas of cold air and the coolant in the liquid flow channel.

[0010] Furthermore, the heater includes an inner tube and an outer tube, with the outer tube spaced outside the inner tube. A gas flow channel is disposed inside the inner tube, and an annular liquid flow channel is formed between the inner tube and the outer tube.

[0011] Furthermore, the inner tube and the outer tube are integrally cast.

[0012] Furthermore, the heater is equipped with an inlet steel pipe, an outlet steel pipe, and a ventilation steel pipe that correspond one-to-one with the inlet pipe, the outlet pipe, and the crankcase ventilation connection pipe. The inlet steel pipe and the ventilation steel pipe are both connected to the liquid flow channel, and the ventilation steel pipe is connected to the gas flow channel. The inlet steel pipe, the outlet steel pipe, and the ventilation steel pipe are all interference-fitted to the heater.

[0013] Furthermore, the gas flow channel inside the inner tube is L-shaped, and the crankcase ventilation connection pipe is connected to the middle bend of the gas flow channel.

[0014] Furthermore, the end of the heater closest to the turbocharger is detachably connected to the heater via a clamp, which is a V-shaped clamp.

[0015] The beneficial effects of this invention are as follows: by introducing blow-by gas from the crankcase into the heater, it mixes with the cold air entering the engine from the air filter intake pipe, and then fully combusts it again in the engine before being discharged, thus meeting the engine's environmental emission requirements. At the same time, when the blow-by gas and cold air are mixed in the heater, the coolant used by the engine is heated to heat the heater, effectively preventing the water vapor generated after the blow-by gas comes into contact with the cold air from condensing on the inner wall of the pipe, thus playing a safety protection role for the normal operation of the engine. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the heater according to an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the exploded structure of the heater according to an embodiment of this application.

[0018] Figure 3 This is a cross-sectional structural diagram of the heater according to an embodiment of this application.

[0019] Figure 4 This is a cross-sectional view of the heater according to another embodiment of this application.

[0020] Among them, 1. heater; 11. inner tube; 12. outer tube; 2. gas flow channel; 3. liquid flow channel; 4. liquid inlet pipe; 41. liquid inlet steel pipe; 5. liquid outlet pipe; 51. liquid outlet steel pipe; 6. crankcase ventilation connection pipe; 61. ventilation steel pipe; 7. clamp. Detailed Implementation

[0021] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0022] This application discloses an engine crankcase ventilation and anti-icing heating device, referring to... Figure 1 , Figure 2 , Figure 3 and Figure 4 The system includes a heater 1, a first coolant passage connecting the engine block and cylinder head, and a second coolant passage connecting the turbocharger. A gas flow channel 2 is provided within the heater 1, with one end connected to the turbocharger's gas inlet and the other end connected to the air filter intake pipe. Cold air flowing from the air filter intake pipe to the turbocharger's intake port passes through the heater 1. A crankcase ventilation connection pipe 6 is connected to the outer wall of the heater 1, allowing blow-by gas to pass through. Blow-by gas in the crankcase ventilation connection pipe 6 enters the heater 1, mixes with the cold air in the air filter intake pipe, and then enters the turbocharger to supply the engine's intake system for combustion before being discharged. This properly treats the blow-by gas in the engine crankcase, ensuring that the engine's emissions meet standards.

[0023] The heater 1 also includes a liquid flow channel 3. The two ends of the liquid flow channel 3 are connected to an inlet pipe 4 and an outlet pipe 5, respectively. One end of the first coolant channel is connected to the inlet pipe 4, and one end of the second coolant channel is connected to the outlet pipe 5. The other end of the second coolant channel is connected to a water pump, and after passing through the water pump, it connects to the other end of the first coolant channel, thus forming a closed-loop coolant circulation heating path. When the engine is running, the coolant passes through the engine block and cylinder head, where it exchanges heat and cools the former two components, raising the coolant temperature to between 80°C and 100°C. After entering the heater 1, the coolant uses its own heat to heat the heater 1 body and exchange heat with the cold air in the gas flow channel 2, effectively preventing gas leakage and ice formation on the inner wall of the pipes during mixing with the cold air, ensuring safe engine operation.

[0024] Specifically, the heater 1 includes an inner tube 11 and an outer tube 12. The outer tube 12 is spaced outside the inner tube 11, and both ends of the outer tube 12 are sealed to the inner tube 11. A gas flow channel 2 extends through the inner tube 11, and a liquid flow channel 3 is formed between the inner tube 11 and the outer tube 12. By enclosing the inner tube 11 with the liquid flow channel 3, the coolant can comprehensively heat the inner tube 11 as it passes through the liquid flow channel 3, effectively preventing water vapor condensation on the inner wall of the inner tube 11.

[0025] In this embodiment, the inner tube 11 and the outer tube 12 are integrally cast, which enables efficient heat transfer between the inner tube 11 and the outer tube 12 and gives the liquid flow channel 3 good sealing performance.

[0026] In this embodiment, the heater 1 is provided with an inlet steel pipe 41, an outlet steel pipe 51, and a ventilation steel pipe 61, which correspond one-to-one with and are connected to the inlet pipe 4, the outlet pipe 5, and the crankcase ventilation connection pipe 6. Both the inlet steel pipe 41 and the ventilation steel pipe 61 are connected to the liquid flow channel 3, and the ventilation steel pipe 61 is connected to the gas flow channel 2. All three pipes are fixedly connected to the heater 1 via an interference fit. In the gas embodiment, the inlet steel pipe 41, the outlet steel pipe 51, and the ventilation steel pipe 61 can also be fixed to the heater 1 by threaded connection or by interlocking.

[0027] The gas flow channel 2 inside the inner tube 11 is L-shaped, and the crankcase ventilation connecting pipe 6 is connected to the middle bend of the gas flow channel 2. The L-shaped gas flow channel 2 can reduce the flow velocity of cold air when it passes through the gas flow channel 2. In this embodiment, the ventilation steel pipe 61 is connected to the heater 1 perpendicular to the centerline of the gas flow channel 2, which allows the blow-by gas to fully contact and mix with the cold air in the gas flow channel 2, and further reduces the flow velocity of the cold air through the blow-by gas, so that the mixed air can exchange heat with the coolant in the liquid flow channel 3 for a longer time in the gas flow channel 2, preheating the cold air and improving the energy utilization rate of the engine.

[0028] In this embodiment, the end of heater 1 near the booster is detachably connected to heater 1 via a clamp 7, which can specifically be a V-shaped clamp. By using a V-shaped clamp, heater 1 and booster 1 can be detachably connected. The clamp 7 ensures that the contact surfaces of heater 1 and booster 1 are tightly fitted. A sealing ring is provided between the contact surfaces to ensure locking and sealing at the connection. Those skilled in the art should understand that although preferred embodiments of this utility model have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Thus, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An engine crankcase ventilation and anti-icing heating device, characterized in that: Includes a heater (1) connected between the gas inlet of the turbocharger and the air filter intake pipe, a first coolant passage through the engine block and cylinder head, and a second coolant passage through the turbocharger; The heater (1) is provided with a gas flow channel (2). One end of the gas flow channel (2) is connected to the gas inlet of the turbocharger and the other end is connected to the air filter inlet pipe. The outer wall of the heater (1) is connected to a crankcase ventilation connection pipe (6). The gas in the crankcase ventilation connection pipe (6) mixes with the cold air in the air filter inlet pipe in the heater (1). The heater (1) is provided with a liquid flow channel (3). The two ends of the liquid flow channel (3) on the heater (1) are respectively connected to the inlet pipe (4) and the outlet pipe (5). One end of the first coolant channel is connected to the inlet pipe (4), one end of the second coolant channel is connected to the outlet pipe (5), and the other end is connected to the first coolant channel through a water pump. The gas in the gas flow channel (2) of the heater (1) exchanges heat with the mixed gas of cold air and the coolant in the liquid flow channel (3).

2. An engine crankcase ventilation anti-icing heating device according to claim 1, characterised in that, The heater (1) includes an inner tube (11) and an outer tube (12). The outer tube (12) is spaced outside the inner tube (11). The gas flow channel (2) is disposed inside the inner tube (11). An annular liquid flow channel (3) is formed between the inner tube (11) and the outer tube (12).

3. An engine crankcase ventilation anti-icing heating device according to claim 2, characterised in that, The inner tube (11) and the outer tube (12) are integrally cast.

4. An engine crankcase ventilation anti-icing heating device according to claim 2, characterised in that, The heater (1) is provided with an inlet steel pipe (41), an outlet steel pipe (51), and a ventilation steel pipe (61) that correspond one-to-one with the inlet pipe (4), the outlet pipe (5), and the crankcase ventilation connection pipe (6). The inlet steel pipe (41) and the ventilation steel pipe (61) are both connected to the liquid flow channel (3), and the ventilation steel pipe (61) is connected to the gas flow channel (2). The inlet steel pipe (41), the outlet steel pipe (51), and the ventilation steel pipe (61) are all interference-fitted to the heater (1).

5. An anti-icing heating device for an engine crankcase ventilation according to claim 4, characterized in that The gas flow channel (2) inside the inner tube (11) is L-shaped, and the crankcase ventilation connecting pipe (6) is connected to the middle bend of the gas flow channel (2).

6. An engine crankcase ventilation anti-icing heating device according to claim 1, characterized in that The heater (1) is detachably connected to the heater (1) at the end near the booster via a clamp (7), which is a V-shaped clamp.

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