Engine cylinder head capable of quick warm-up

Abstract

This utility model discloses an engine cylinder head capable of rapid warm-up, belonging to the technical field of engine cylinder head technology. The engine cylinder head for rapid warm-up includes a cylinder head mounted on top of the engine cylinder. An intake manifold for air intake is located on one side of the cylinder head, and an exhaust manifold for air exhaust is located on the other side. A circulation mechanism for coolant circulation is located on one side of the engine cylinder. A waste heat recovery assembly for recovering exhaust heat is located on one side of the cylinder head, and a thermostat for controlling the passage is installed on a conduit at one end of the waste heat recovery assembly. Several piston ports for air intake and exhaust are provided at the bottom of the cylinder head. This utility model, by incorporating a waste heat recovery assembly, utilizes a heat-absorbing flat tube in contact with the periphery of the exhaust manifold to directly absorb unused heat from the exhaust gas, providing heating for the coolant and shortening the time it takes for the engine to reach operating temperature.

Description

Technical Field

[0001] This utility model belongs to the field of engine cylinder head technology, specifically relating to an engine cylinder head that can quickly warm up the engine. Background Technology

[0002] In the construction of a car, the engine is undoubtedly the core component. As the "heart" of the car, it is responsible for converting the chemical energy of fuel into mechanical power to propel the vehicle forward. The warm-up process plays an important role in the normal operation of the engine. It allows the various parts of the engine to reach the appropriate operating temperature, allows the engine oil to fully lubricate the moving parts, reduces friction and wear between parts, and optimizes fuel atomization and combustion, thereby improving the engine's efficiency and performance. When the warm-up is insufficient, engine wear will increase significantly, fuel economy will deteriorate, and emissions pollution will be aggravated.

[0003] However, traditional engine cylinder heads have problems during the warm-up process, the most prominent of which is the slow warm-up speed. Most cylinder heads use a shared cooling circuit between the cylinder block and the cylinder head. During cold starts, a large amount of low-temperature coolant flows directly through the cylinder head water jacket, quickly carrying away the heat generated by combustion, which slows down the warm-up speed of the cylinder head. At the same time, during the cold start stage, most of the combustion heat is discharged with the exhaust gas, and the exhaust temperature can reach 600-800℃. However, in the current design, the heat exchange path between the exhaust waste heat and the cylinder head is short and inefficient, and it is impossible to effectively recover the waste heat for cylinder head warm-up. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an engine cylinder head that can warm up quickly.

[0005] The technical solution adopted to solve the above technical problems is: an engine cylinder head that can quickly warm up the engine, including a cylinder head set on the top of the engine cylinder, an intake manifold for intake is provided on one side of the cylinder head, an exhaust manifold for exhaust is provided on the other side of the cylinder head, and a circulation mechanism for coolant circulation is provided on one side of the engine cylinder. A waste heat recovery assembly for exhaust gas waste heat recovery is provided on one side of the cylinder head, and a thermostat for controlling the passage is provided on one end of the waste heat recovery assembly's conduit. The bottom of the cylinder head has several piston ports for engine air intake and exhaust.

[0006] Furthermore, the cylinder head is provided with an exhaust passage and an intake passage, both of which are connected to the piston port. A coolant chamber is provided around the exhaust passage and the intake passage. A branch pipe outlet is provided on one side wall of the cylinder head. Several coolant inlets are provided at the bottom of the cylinder head. The coolant inlets and the branch pipe outlet are connected to the coolant chamber.

[0007] Through the above technical solution, the exhaust and intake passages in the cylinder head realize the exhaust and intake functions of the engine, respectively, and are connected to the piston port to adapt to the working cycle of the engine. The coolant chambers around the exhaust and intake passages can introduce coolant through the coolant inlet to initially recover the waste heat of the exhaust gas in the exhaust passage, and at the same time preheat the intake air. The branch pipe outlet is used to export the coolant after heat absorption, realize the circulation and heat exchange of the coolant, thereby ensuring that the cylinder head works at a suitable temperature and improving the thermal efficiency and stability of the engine.

[0008] Furthermore, the waste heat recovery assembly includes a heat-absorbing flat tube, which is provided with a plurality of drain branches. One end of the drain outlet of the branch on the cylinder head is provided with a branch interface, and the drain branch and the branch interface are connected by threads.

[0009] Through the above technical solution, the heat-absorbing flat tube of the waste heat recovery component can absorb the waste heat of the exhaust gas at the exhaust manifold and heat the coolant. The threaded connection between the drain branch pipe and the cylinder head branch pipe interface facilitates the disassembly and maintenance of the waste heat recovery component, while ensuring the sealing of the coolant passage. This allows the preheated coolant to be transported to the subsequent circulation mechanism through the conduit, achieving effective recovery and utilization of exhaust gas waste heat, accelerating engine warm-up, and reducing fuel consumption and wear during cold starts.

[0010] Furthermore, the circulation mechanism includes a liquid pump mounted on the engine cylinder, the liquid outlet of the engine cylinder being connected to the cooling chamber on the engine cylinder, a thermostat II being connected to the liquid pump inlet via a conduit, a conduit I and a conduit II being respectively mounted on the thermostat II, the conduit II being connected to an external heat sink, the other end of the conduit I being connected to the thermostat I, a main exhaust pipe being mounted on one side of the cylinder head, and the other end of the main exhaust pipe being mounted on the thermostat I.

[0011] Through the above technical solution, the liquid pump of the circulation mechanism provides power for the circulation of coolant, and the thermostat can control its flow direction according to the coolant temperature. When the temperature is low, the coolant enters the liquid pump and the engine through the first conduit for circulation and warm-up. When the temperature is high, it enters the external heat sink through the second conduit for heat dissipation. The thermostat also controls the passage of the waste heat recovery component, so that the entire cooling and waste heat recovery system can intelligently switch according to the engine operating conditions, which can not only ensure the engine warms up quickly, but also maintain a suitable temperature during normal operation, thereby improving the engine's working efficiency and reliability.

[0012] Furthermore, a number of exhaust branch pipes are provided on one side of the exhaust manifold, and an exhaust port is provided at one end of the exhaust passage on the cylinder head. The exhaust branch pipes are connected to the exhaust port by bolts.

[0013] The above technical solution, which uses bolts to connect the exhaust manifold to the cylinder head exhaust interface, facilitates the disassembly and maintenance of the exhaust manifold while ensuring the sealing of the exhaust passage. This allows the exhaust gas generated by the engine to pass smoothly through the exhaust passage and exhaust manifold into the exhaust manifold before being discharged from the engine, ensuring the smooth flow of the exhaust system and providing a stable exhaust environment for the engine's power output.

[0014] Furthermore, the number of exhaust and intake passages corresponds to the number of piston ports.

[0015] With the above technical solution, the number of exhaust ports and intake ports corresponds to the number of piston ports, which can ensure that each piston port can perform intake and exhaust functions. This allows each cylinder of the engine to complete independent intake, compression, power, and exhaust cycles, ensuring the synchronicity and balance of the operation of each cylinder of the engine, thereby improving the overall power output stability and working efficiency of the engine.

[0016] Furthermore, the cooling chamber inside the engine cylinder is connected to the coolant chamber inside the cylinder head through a coolant inlet, and several coolant chambers inside the cylinder head are connected to each other.

[0017] Through the above technical solution, the engine cylinder cooling chamber and the cylinder head coolant chamber are connected through the coolant inlet, and multiple coolant chambers in the cylinder head are interconnected, so that the coolant can form a complete circulation path between the engine cylinder and the cylinder head, realizing comprehensive cooling and preheating of the engine cylinder and cylinder head, ensuring uniform temperature of all parts of the engine, avoiding local overheating or overcooling, thereby improving the overall performance and service life of the engine.

[0018] The beneficial effects of this utility model are as follows: (1) By setting up a waste heat recovery component, this utility model uses a heat-absorbing flat tube to contact the periphery of the exhaust manifold to directly absorb the unused heat in the exhaust gas and provide heating for the coolant. During the cold start phase, the heat source obtained by the cylinder head increases from a single combustion heat to combustion heat and exhaust gas waste heat, which shortens the time for the engine to reach the working temperature; (2) By setting up thermostat one and thermostat two, this utility model achieves dynamic switching of the coolant circulation path through the synergistic effect of thermostat one and thermostat two, taking into account both the needs of rapid warm-up and normal heat dissipation. The control logic of the dual thermostats avoids the problem of heat loss during warm-up and heat accumulation during normal operation; (3) By opening a coolant cavity, the high-temperature exhaust gas flowing in the exhaust passage will directly transfer heat to the coolant in the cavity, avoiding the direct loss of exhaust gas heat with the exhaust manifold. At the same time, the coolant around the intake passage can moderately preheat the intake air, improving the intake air temperature and fuel atomization effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a bottom view of the cylinder head structure of this utility model; Figure 3 This is a top view of the cylinder head structure of this utility model; Figure 4 This is a cross-sectional view of the cylinder head structure of this utility model; Figure 5 This is a cross-sectional view of the cylinder head structure end face of this utility model.

[0020] Reference numerals: 1. Cylinder head; 101. Coolant inlet; 102. Exhaust passage; 103. Intake passage; 104. Coolant chamber; 105. Branch pipe outlet; 2. Engine cylinder; 3. Circulation mechanism; 301. Liquid pump; 302. Thermostat II; 303. Pipe I; 304. Main drain pipe; 305. Pipe II; 4. Waste heat recovery assembly; 401. Heat absorption flat tube; 402. Drain branch pipe; 403. Branch pipe interface; 5. Exhaust manifold; 501. Exhaust branch pipe; 502. Exhaust interface; 6. Intake manifold; 7. Thermostat I; 8. Piston port. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] like Figures 1-4 As shown in the figure, an engine cylinder head capable of rapid warm-up in this embodiment includes a cylinder head 1 disposed on top of an engine cylinder 2. The cylinder head 1 is fixed to the top of the engine cylinder 2 by bolts. The cylinder head 1 is made of high-strength aluminum alloy, which has good thermal conductivity and fatigue resistance. It is uniformly fixed to the top of the engine cylinder 2 by M12 high-strength bolts. Copper gaskets are added at the bolt connections to ensure sealing performance and prevent coolant leakage. The cylinder head 1 has an exhaust passage 102 and an intake passage 103 respectively. The number of exhaust passages 102 and intake passages 103 are consistent with the number of piston ports 8 of the engine cylinder 2, and they correspond one-to-one to ensure that the intake and exhaust of each piston are independent and smooth. At the same time, the exhaust passage 102... The inner walls of the exhaust port 102 and the intake port 103 are polished to reduce airflow resistance. Coolant chambers 104 are provided around the exhaust port 102 and the intake port 103. The coolant chambers 104 are annular cavity structures to ensure that the coolant can evenly surround the air passage and quickly absorb or release heat. A branch pipe outlet 105 is provided on one side wall of the cylinder head 1. The branch pipe outlet 105 is a circular interface used to discharge the coolant in the coolant chamber 104. Several coolant inlets 101 are provided at the bottom of the cylinder head 1. The coolant inlets 101 are adapted to the cooling chamber outlet of the engine cylinder 2. The coolant inlets 101 and the branch pipe outlet 105 are seamlessly connected to the coolant chamber 104 to form a complete coolant flow path.

[0023] like Figures 2-3 As shown, in this embodiment, one side of the cylinder head 1 is connected to an intake manifold 6 for intake via flange bolts. The intake manifold 6 is made of cast aluminum and has a bifurcated air passage structure inside. Each bifurcation corresponds one-to-one with the intake passage 103 of the cylinder head 1. To ensure that the outside air is evenly distributed to each piston port 8, the other side of the cylinder head 1 is connected to an exhaust manifold 5 for exhaust via flange bolts. Several exhaust branch pipes 501 are provided on one side of the exhaust manifold 5. The number of exhaust branch pipes 501 is the same as that of the exhaust passage 102, and the pipe diameter is adapted to the exhaust passage 102. One end of the exhaust passage 102 on the cylinder head 1 is provided with an exhaust interface 502. The exhaust interface 502 is a metal interface with a flange. The exhaust branch pipes 501 are connected to the exhaust interface 502 via bolts.

[0024] like Figures 1-4 As shown, in this embodiment, a circulation mechanism 3 for coolant circulation is provided on one side of the engine cylinder 2. The circulation mechanism 3 includes a liquid pump 301 fixed to the side wall of the engine cylinder 2 by a bracket. The liquid pump 301 is powered by the engine. The outlet of the engine cylinder 2 is connected to the cooling chamber on the engine cylinder 2. Its inlet is connected to the outlet of the thermostat 302 through a rubber hose. The thermostat 302 is a paraffin type thermostat with an opening temperature set at 80°C. It is connected to a first conduit 303 and a second conduit 305. The other end of the second conduit 305 is connected to an external heat sink to guide the high-temperature coolant into the heat sink for cooling. The other end of the first conduit 303 is connected to the first thermostat 7 to form a coolant circulation branch. A main outlet pipe 304 is provided on one side of the cylinder head 1. The main outlet pipe 304 is a stainless steel main conduit. One end is connected to the coolant chamber 104 inside the cylinder head 1, and the other end is connected to the first thermostat 7 through a flange to drain the coolant from the coolant chamber 104 inside the cylinder head 1.

[0025] like Figures 1-3As shown, in this embodiment, a waste heat recovery assembly 4 for exhaust gas waste heat recovery is provided on one side of the cylinder head 1. This assembly heats the coolant by recovering the heat from the exhaust gas, thereby achieving rapid engine warm-up. The waste heat recovery assembly 4 includes a heat-absorbing flat tube 401, which is made of copper alloy and has a flat flow channel inside to increase the contact area with the exhaust manifold 5. The heat-absorbing flat tube 401 is fixed tightly against the outer wall of the exhaust manifold 5, which can efficiently absorb the exhaust gas heat transferred by the exhaust manifold 5. Several drain branches 4 are provided on the heat-absorbing flat tube 401. 02. One end of the branch pipe outlet 105 on the cylinder head 1 is provided with a branch pipe interface 403. The number of drain branch pipes 402 is the same as that of the branch pipe outlet 105 on the cylinder head 1. The drain branch pipe 402 and the branch pipe interface 403 are connected by threads to ensure that the coolant in the coolant chamber 104 can flow into the heat absorption flat pipe 401. One end of the waste heat recovery component 4 is provided with a thermostat 7 for controlling the passage. The thermostat 7 is also a paraffin type thermostat with an opening temperature set at 70°C to control the opening and closing of the waste heat recovery branch. like Figure 4 As shown, the cylinder head 1 of this embodiment has several piston ports 8 at the bottom for engine intake and exhaust. The piston ports 8 are circular through holes with a diameter that matches the diameter of the top of the engine piston. The exhaust port 102 and the intake port 103 are both connected to the piston ports 8. Valve is installed at the corresponding position of the piston ports 8. The opening and closing of the valve controls the connection and disconnection of the intake port 103 and the exhaust port 102, ensuring normal engine intake, combustion and exhaust.

[0026] like Figures 1-4 As shown, in this embodiment, the cooling chamber in the engine cylinder 2 and the coolant chamber 104 in the cylinder head 1 are connected through the coolant inlet 101, and several coolant chambers 104 inside the cylinder head 1 are interconnected through a transverse connecting pipe to form an integral coolant circulation chamber, allowing the coolant to flow freely between the engine cylinder 2 and the cylinder head 1, ensuring uniform temperature between the cylinder block and the cylinder head 1. At the same time, in conjunction with the circulation mechanism 3 and the waste heat recovery component 4, the dual functions of rapid warm-up and stable temperature control are achieved.

[0027] Working principle: During engine cold start, the liquid pump 301 of the circulation mechanism 3 starts, and the coolant in the cooling chamber of engine cylinder 2 flows into the coolant chamber 104 of cylinder head 1 through coolant inlet 101, connecting the cylinder block and the cooling chamber of cylinder head 1. At this time, the thermostat 7 of the waste heat recovery assembly 4 is closed, and the coolant flows into the heat absorption flat tube 401 through the branch pipe outlet 105 and branch pipe interface 403 of cylinder head 1. The heat absorption flat tube 401 is in close contact with the exhaust manifold 5 to absorb heat from the exhaust gas. The heated coolant flows back to the thermostat 302 through the first conduit 303. When thermostat 2 302 is closed, the coolant is directly pumped back into the cooling chamber via liquid pump 301, forming a closed-loop preheating cycle that rapidly increases the temperature of cylinder head 1 and engine cylinder 2. When the engine temperature reaches 70°C, thermostat 1 7 opens, the waste heat recovery component 4 stops working, and the coolant in cylinder head 1 is discharged from the main outlet pipe 304 into thermostat 2 302. When the temperature reaches 80°C, thermostat 2 302 opens, and the coolant flows through conduit 2 305 into the external radiator for cooling. After cooling, it flows back to liquid pump 301 to achieve temperature balance.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. An engine cylinder head capable of quick warm-up, comprising a cylinder head (1) arranged on top of an engine cylinder (2), characterized in that: The cylinder head (1) is provided with an intake manifold (6) for intake, and the cylinder head (1) is provided with an exhaust manifold (5) for exhaust. The engine cylinder (2) is provided with a circulation mechanism (3) for coolant circulation. A waste heat recovery assembly (4) for exhaust gas waste heat recovery is provided on one side of the cylinder head (1), and a thermostat (7) for controlling the passage is provided on one end of the waste heat recovery assembly (4). The cylinder head (1) has several piston ports (8) at the bottom for engine air intake and exhaust.

2. The quick warm-up capable engine cylinder head according to claim 1, characterized by, The cylinder head (1) is provided with an exhaust passage (102) and an intake passage (103) respectively. The exhaust passage (102) and the intake passage (103) are both connected to the piston port (8). Coolant chambers (104) are provided around the exhaust passage (102) and the intake passage (103). A branch pipe outlet (105) is provided on one side wall of the cylinder head (1). Several coolant inlets (101) are provided at the bottom of the cylinder head (1). The coolant inlets (101) and the branch pipe outlets (105) are connected to the coolant chambers (104).

3. The quick warm-up capable engine cylinder head according to claim 1, characterized by, The waste heat recovery assembly (4) includes a heat-absorbing flat tube (401), and a plurality of drain branches (402) are provided on the heat-absorbing flat tube (401). One end of the branch outlet (105) on the cylinder cover (1) is provided with a branch interface (403). The drain branches (402) and the branch interface (403) are connected by threads.

4. The quick warm-up capable engine cylinder head according to claim 1, characterized by, The circulation mechanism (3) includes a liquid pump (301) installed on the engine cylinder (2). The outlet of the engine cylinder (2) is connected to the cooling chamber on the engine cylinder (2). The inlet of the liquid pump (301) is connected to a thermostat (302) via a conduit. The thermostat (302) is provided with a conduit (303) and a conduit (305) respectively. The conduit (305) is connected to an external heat sink. The other end of the conduit (303) is connected to the thermostat (7). A main exhaust pipe (304) is provided on one side of the cylinder head (1). The other end of the main exhaust pipe (304) is provided on the thermostat (7).

5. The quick warm-up capable engine cylinder head according to claim 1, characterized by, The exhaust manifold (5) has several exhaust branch pipes (501) on one side, and the exhaust port (502) on the cylinder head (1) has an exhaust port (502) at one end. The exhaust branch pipes (501) are connected to the exhaust port (502) by bolts.

6. The quick warm-up engine cylinder head of claim 2, wherein The number of exhaust passages (102) and intake passages (103) corresponds to the number of piston ports (8).

7. The quick warm-up capable engine cylinder head according to claim 1, characterized by, The cooling chamber in the engine cylinder (2) is connected to the coolant chamber (104) in the cylinder head (1) through the coolant inlet (101), and several coolant chambers (104) in the cylinder head (1) are connected.

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