Ventilation anti-icing heating device for crankcase of engine

Abstract

The invention provides a ventilation anti-icing heating device for an engine crankcase, and belongs to the technical field of engines. Comprising a heater connected between a gas inlet of a supercharger and an air filter gas inlet pipe, a first cooling liquid channel passing through an engine body and a cylinder cover, and a second cooling liquid channel passing through the supercharger. A gas flow channel and a liquid flow channel are arranged in the heater, the first cooling channel, the liquid inlet pipe, the liquid flow channel, the liquid outlet pipe, the second cooling channel and the water pump form a circulating cooling liquid flow channel, one end of the gas flow channel is connected with a gas inlet of the supercharger, the other end of the gas flow channel is connected with an air filter gas inlet pipe, and a crankcase ventilation connecting pipe is connected to the outer wall of the heater. The crankcase ventilation connecting pipe is communicated with the gas flow channel; the blow-by gas and the cold air are mixed and then fully combusted in the engine to ensure the environment-friendly requirement of the engine, meanwhile, the heater is heated by the cooling liquid, water vapor generated after the blow-by gas makes contact with the cold air is prevented from being condensed into ice in a pipeline, and the operation safety of the engine is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an engine crankcase ventilation anti-icing heating device. Background Art

[0002] When the engine is running, some of the exhaust gas generated by the fuel combustion in the combustion chamber leaks into the crankcase through the gap between the piston rings. This exhaust gas, called crankcase blowby, is discharged directly into the atmosphere, causing air pollution. If the blowby is not promptly removed, crankcase pressure increases, leading to internal and external seal failure and oil leakage. In severe cases, a significant reduction in engine lubricating oil can endanger engine operation. Current environmental regulations require natural gas engines to utilize a closed, forced crankcase ventilation system. This means that crankcase blowby gas is not permitted to be discharged directly into the atmosphere. Instead, it is recirculated into the engine intake system, burned, and then discharged with the exhaust. Furthermore, crankcase pressure must be below atmospheric pressure during engine operation. Based on these requirements, crankcase blowby gas must mix with fresh air at the engine intake before entering the combustion chamber for further combustion and discharge.

[0003] When the engine is used in the extremely cold conditions of northern winter, the hot air rushing out of the crankcase outlet and the cold air coming from the engine air filter inlet are mixed at the air intake in front of the supercharger. The alternation of hot and cold air will form a large amount of condensed water. Part of the condensed water will freeze at the intersection of the crankcase ventilation outlet and the intake pipe, blocking the crankcase ventilation pipe and endangering the safe operation of the engine. Summary of the Invention

[0004] In view of the above problems, the present invention provides an engine crankcase ventilation anti-icing heating device.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows:

[0006] Provided is an engine crankcase ventilation anti-icing heating device, comprising a heater connected between a gas inlet of a supercharger and an air filter intake pipe, a first coolant passage passing through an engine body and a cylinder head, and a second coolant passage passing through the supercharger;

[0007] A gas flow channel is provided in the heater, one end of which is connected to the gas inlet of the supercharger 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. Blow-by gas in the crankcase ventilation connecting pipe and cold air in the air filter intake pipe are mixed in the heater.

[0008] A liquid flow channel is provided in the heater, and both ends of the liquid flow channel on the heater are connected to the liquid inlet pipe and the liquid outlet pipe respectively. One end of the first coolant channel is connected to the liquid inlet pipe, and one end of the second coolant channel is connected to the liquid outlet pipe, and the other end is connected to the first coolant channel through a water pump;

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

[0010] Furthermore, the heater includes an inner tube and an outer tube, the outer tube is sleeved on the outside of the inner tube at intervals, the gas flow channel is set through 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 provided with a liquid inlet steel pipe, a liquid outlet steel pipe and a ventilation steel pipe which correspond to and are connected one by one to the liquid inlet pipe, the liquid outlet pipe and the crankcase ventilation connecting pipe. The liquid 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 liquid inlet steel pipe, the liquid outlet steel pipe and the ventilation steel pipe are all interference-fixedly connected to the heater.

[0013] Furthermore, the gas flow channel in the inner tube is in an "L" shape, and the crankcase ventilation connecting pipe is connected to the middle turning point of the gas flow channel.

[0014] Furthermore, one end of the heater close to the supercharger is detachably connected to the heater via a clamp, and the clamp is a V-shaped clamp.

[0015] The beneficial effects of the present invention are as follows: by passing the blow-by gas in the crankcase into the heater, mixing it with the cold air entering the engine from the air filter intake pipe, and then fully burning it again in the engine before being discharged, the environmental emission requirements of the engine are met. At the same time, when the blow-by gas and cold air are mixed in the heater, the heater is heated by the coolant circulated by the engine, which effectively prevents the water vapor generated by the contact between the blow-by gas and the cold air from condensing on the inner wall of the pipe, thereby playing a safety protection role for the normal operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0018] Figure 3 This is a schematic cross-sectional structural diagram of a heater according to an embodiment of the present application from one perspective.

[0019] Figure 4 This is a schematic cross-sectional structural diagram of the heater from another perspective according to an embodiment of the present 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 connecting pipe; 61. Ventilation steel pipe; 7. Clamp. DETAILED DESCRIPTION

[0021] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] The present application discloses an engine crankcase ventilation anti-icing heating device, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , including a heater 1, a first coolant channel passing through the engine body and the cylinder head, and a second coolant channel passing through the supercharger. Among them, a gas flow channel 2 is provided in the heater 1, one end of the gas flow channel 2 is connected to the gas inlet of the supercharger, and the other end is connected to the air filter intake pipe. The cold air flowing to the air inlet of the supercharger through the air filter intake pipe passes through the heater 1. A crankcase ventilation connecting pipe 6 is connected to the outer wall of the heater 1, and the crankcase ventilation connecting pipe 6 is for the blowby gas to pass through. The blowby gas in the crankcase ventilation connecting pipe 6 enters the heater 1, and after mixing with the cold air in the air filter intake pipe in the heater 1, it enters the supercharger together and supplies the intake system in the engine body for combustion and then is discharged, so that the blowby gas in the engine crankcase is properly treated and the engine emissions meet the standards.

[0023] A liquid flow channel 3 is also provided in the heater 1. The two ends of the liquid flow channel 3 of the heater 1 are respectively connected to the liquid inlet pipe 4 and the liquid outlet pipe 5. One end of the first coolant channel is connected to the liquid inlet pipe 4, and one end of the second coolant channel is connected to the liquid outlet pipe 5. The other end of the second coolant channel is connected to a water pump and is connected to the other end of the first coolant channel after passing through the water pump, thereby forming a closed coolant circulation heating path. When the engine is working, the coolant exchanges heat and cools the engine body and cylinder head after passing through the engine body and cylinder head. The coolant temperature rises to between 80°C and 100°C. After the coolant enters the heater 1, it uses its own heat to heat the heater 1 body and to exchange heat with the cold air in the gas flow channel 2, effectively preventing the blowby gas from freezing on the inner wall of the pipe during the mixing process with the cold air, thereby ensuring the safe operation of the engine.

[0024] Specifically, the heater 1 includes an inner tube 11 and an outer sleeve 12. The outer sleeve 12 is spaced apart and sleeved outside the inner tube 11. Both ends of the outer sleeve 12 are sealed to the inner tube 11. The gas flow channel 2 is opened through the inner tube 11, and the liquid flow channel 3 is formed between the inner tube 11 and the outer sleeve 12. By having the liquid flow channel 3 wrap around the inner tube 11, the coolant can fully heat the inner tube 11 when passing through the liquid flow channel 3, effectively preventing the formation of water vapor condensation on the inner wall of the inner tube 11.

[0025] In the embodiment of the present application, the inner tube 11 and the outer tube 12 are integrally cast, which can achieve efficient heat transfer between the inner tube 11 and the outer tube 12 and provide the liquid flow channel 3 with good sealing performance.

[0026] In the embodiment of the present application, the heater 1 is provided with a liquid inlet steel pipe 41, a liquid outlet steel pipe 51, and a ventilation steel pipe 61 that correspond to and are connected to the liquid inlet pipe 4, the liquid outlet pipe 5, and the crankcase ventilation connecting pipe 6. The liquid 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 liquid inlet steel pipe 41, the liquid outlet steel pipe 51, and the ventilation steel pipe 61 are all fixedly connected to the heater 1 by interference fit. In the gas embodiment, the liquid inlet steel pipe 41, the liquid outlet steel pipe 51, and the ventilation steel pipe 61 can also be fixed to the heater 1 by threaded connection and screw thread connection.

[0027] The gas flow channel 2 within the inner tube 11 is L-shaped, and the crankcase ventilation connecting pipe 6 is connected to the mid-turn point of the gas flow channel 2. The L-shaped gas flow channel 2 can reduce the flow rate of cold air as it passes through the gas flow channel 2. In the embodiment of the present application, the ventilation steel pipe 61 is connected to the heater 1 perpendicular to the centerline of the gas flow channel 2, allowing the blowby gas to fully contact and mix with the cold air in the gas flow channel 2. The blowby gas further reduces the flow rate of the cold air, allowing the mixed air to exchange heat with the coolant in the liquid flow channel 3 for a longer period of time in the gas flow channel 2, thereby preheating the cold air and improving the energy utilization rate of the engine.

[0028] In the embodiment of the present application, the end of the heater 1 closest to the supercharger is detachably connected to the heater 1 via a clamp 7, which can be a V-shaped clamp. The V-shaped clamp allows for detachable connection between the heater 1 and the supercharger. The clamp 7 secures the contact surfaces between the heater 1 and the supercharger, and a sealing ring is provided between the contact surfaces to ensure a tight and sealed connection. Those skilled in the art will appreciate that while preferred embodiments of the present invention have been described, those skilled in the art may make further changes and modifications to these embodiments once they understand the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as covering the preferred embodiments and all variations and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, the present invention is intended to include such changes and modifications as fall within the scope of the claims and their equivalents.

Claims

1. An engine crankcase ventilation anti-icing heating device, characterized by: The invention comprises a heater (1) connected between a gas inlet of a supercharger and an air filter intake pipe, a first coolant channel passing through an engine body and a cylinder head, and a second coolant channel passing through the supercharger; A gas flow channel (2) is provided in the heater (1), one end of the gas flow channel (2) is connected to the gas inlet of the supercharger, and the other end is connected to the air filter intake pipe. A crankcase ventilation connecting pipe (6) is connected to the outer wall of the heater (1), and blowby gas in the crankcase ventilation connecting pipe (6) and cold air in the air filter intake pipe are mixed in the heater (1); A liquid flow channel (3) is provided in the heater (1), and both ends of the liquid flow channel (3) on the heater (1) are respectively connected to a liquid inlet pipe (4) and a liquid outlet pipe (5), one end of the first coolant channel is connected to the liquid inlet pipe (4), one end of the second coolant channel is connected to the liquid outlet pipe (5), and the other end is connected to the first coolant channel via a water pump; The mixed gas of blowby gas and cold air in the gas flow channel (2) in the heater (1) and the coolant in the liquid flow channel (3) perform heat exchange.

2. The engine crankcase ventilation anti-icing heating device according to claim 1, characterized in that: The heater (1) comprises an inner tube (11) and an outer tube (12), wherein the outer tube (12) is sleeved on the outside of the inner tube (11) at intervals, and the gas flow channel (2) is arranged through the inner tube (11), and an annular liquid flow channel (3) is formed between the inner tube (11) and the outer tube (12).

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

4. The engine crankcase ventilation anti-icing heating device according to claim 2, characterized in that: The heater (1) is provided with a liquid inlet steel pipe (41), a liquid outlet steel pipe (51) and a ventilation steel pipe (61) which correspond to and are connected to the liquid inlet pipe (4), the liquid outlet pipe (5) and the crankcase ventilation connecting pipe (6). The liquid inlet steel pipe (41) and the ventilation steel pipe (61) are both communicated with the liquid flow channel (3), and the ventilation steel pipe (61) is communicated with the gas flow channel (2). The liquid inlet steel pipe (41), the liquid outlet steel pipe (51) and the ventilation steel pipe (61) are all fixedly connected to the heater (1) by interference fit.

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

6. The engine crankcase ventilation anti-icing heating device according to claim 1, characterized in that: One end of the heater (1) close to the supercharger is detachably connected to the heater (1) via a clamp (7), and the clamp (7) is a V-shaped clamp.

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