Temperature regulator, engine and vehicle

Abstract

The thermolator comprises a first thermolator body, a second thermolator body and a bypass pipeline, the first thermolator body is provided with a first water inlet and a first water outlet, the second thermolator body is provided with a second water inlet, a bypass flow channel is communicated with the first water outlet, the second water inlet and a third water inlet, the first water inlet is communicated with a cylinder hole flow channel, and the second water inlet is communicated with a cylinder hole flow channel. The third water inlet is communicated with the engine cooling water outlet flow channel, the cooling effect of the cylinder body is controlled by controlling the opening degree of the first water inlet, the cooling effect of the engine oil cooler is controlled by controlling the opening degree of the third water inlet, and control over a cooling loop is finer; compared with a conventional scheme that a pipeline for connecting the engine oil cooler and the thermolator needs to be additionally arranged, the third water inlet is communicated with the engine cooling water outlet flow channel formed by matching the cylinder body with the water jacket partition plate, the pipeline for connecting the engine oil cooler and the thermolator does not need to be additionally arranged, and the structure of the engine is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a thermostat, an engine and a vehicle. Background Art

[0002] The engine drives the vehicle by converting the heat energy of fuel combustion into mechanical energy. The engine needs to be temperature controlled during operation to improve thermal efficiency and ensure that the engine is in the optimal operating range.

[0003] At present, the temperature control of the engine is mainly achieved by the cooling system, which is mainly composed of a water pump, a radiator, a thermostat and related pipelines, etc. At present, the cooling of each component of the engine requires the setting of independent cooling pipelines, which has a complex structure and the control of the cooling circuit is not precise enough. Utility Model Content

[0004] The utility model aims to provide a thermostat, an engine and a vehicle, which solve the problem that cooling of various engine parts requires setting up independent cooling pipelines, resulting in complex structure and imprecise control of the cooling circuit.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In the first aspect, the utility model provides a thermostat, comprising: a first thermostat, having a first chamber, a first water inlet and a first water outlet, one end of the first water inlet is connected to the first chamber, the other end of the first water inlet is used to connect to the cylinder bore flow channel, one end of the first water outlet is connected to the first chamber, and the first thermostat is used to control the opening of the first water inlet; a second thermostat, having a second chamber and a second water inlet, one end of the second water inlet is connected to the second chamber, and the second thermostat is used to control the opening of the second water inlet; a bypass pipe connected to the first thermostat and the second thermostat; the bypass pipe has a bypass flow channel and a third water inlet, one end of the bypass flow channel is connected to the first water outlet, the other end of the bypass flow channel is connected to the second water inlet, one end of the third water inlet is connected to the bypass flow channel, and the other end of the third water inlet is used to connect to the machine cooling water outlet flow channel.

[0007] In one embodiment, the first thermostat further has a fourth water inlet and a second water outlet, both of which are connected to the first chamber, the fourth water inlet is used to connect to the cylinder head, and the second water outlet is used to connect to the radiator.

[0008] In one embodiment, the second thermostat also has a fifth water inlet and a third water outlet, and the fifth water inlet and the third water outlet are both connected to the second chamber, the fifth water inlet is used to connect to the radiator, and the third water outlet is used to connect to the water pump, and the second thermostat is also used to control the opening of the fifth water inlet.

[0009] In one embodiment, the first thermostat includes a first control valve, which is accommodated in the first chamber and is used to adjust the opening of the first water inlet according to the temperature of the fourth water inlet.

[0010] In one embodiment, the second thermostat includes a second control valve, which is accommodated in the second chamber, and the second control valve is used to control the opening of the second water inlet, and / or the second control valve is used to control the opening of the fifth water inlet.

[0011] In one embodiment, the second control valve includes a first valve and a second valve arranged at intervals, the first valve is used to control the opening of the second water inlet, and the second valve is used to control the opening of the fifth water inlet; the first valve and the second valve are controlled in linkage so that when the first valve is closed, the second valve is opened, and when the first valve is opened, the second valve is closed.

[0012] In the second aspect, the utility model also provides an engine, comprising a cylinder block, a water jacket baffle and a thermostat described in any one of the various embodiments of the first aspect, wherein the cylinder block has a cylinder hole, a mounting groove, a cylinder hole water outlet and a thermostatic water outlet, the mounting groove surrounds the outer circumference of the cylinder hole, the water jacket baffle is received in the mounting groove and cooperates with the side wall of the mounting groove to form a cylinder hole flow channel and a machine cooling water outlet flow channel, the cylinder hole water outlet is connected to the cylinder hole flow channel, and the thermostatic water outlet is connected to the machine cooling water outlet flow channel; the thermostat is connected to the cylinder block, and the first water inlet is connected to the cylinder hole water outlet, and the third water inlet is connected to the thermostatic water outlet.

[0013] In one embodiment, the engine also includes a water pump and an oil cooler, the cylinder body also has a cylinder bore water inlet, a machine cooling water inlet and a machine cooling water return port, the cylinder bore water inlet is connected to the cylinder bore flow channel, the water pump is connected to the cylinder bore water inlet, the water jacket baffle cooperates with the side wall of the mounting groove to form a machine cooling water inlet flow channel, the machine cooling water inlet flow channel is connected to the cylinder bore water inlet, the machine cooling water inlet is connected to the machine cooling water inlet flow channel, the machine cooling water return port is connected to the machine cooling water outlet flow channel, and the oil cooler is connected to the machine cooling water inlet and the machine cooling water return port.

[0014] In one embodiment, the water jacket baffle includes a plate body, a machine cooling water inlet isolating rib and a machine cooling water outlet isolating rib, the machine cooling water inlet isolating rib and the machine cooling water outlet isolating rib are arranged on the outer peripheral surface of the plate body, the machine cooling water inlet isolating rib is tightly attached to the side wall of the mounting groove to enclose the machine cooling water inlet flow channel, and the machine cooling water outlet isolating rib is tightly attached to the side wall of the mounting groove to enclose the machine cooling water outlet flow channel.

[0015] In one embodiment, the engine further includes a radiator, and the radiator is connected to the second water outlet and the fifth water inlet of the thermostat.

[0016] In a third aspect, the present invention further provides a vehicle, comprising the engine described in any one of the various embodiments of the second aspect.

[0017] The thermostat provided by the utility model is provided with a first thermostat, a second thermostat and a bypass pipeline. The first thermostat has a first water inlet and a first water outlet, the second thermostat has a second water inlet, the bypass flow channel connects the first water outlet, the second water inlet and the third water inlet, and the first water inlet is connected to the cylinder bore flow channel, the third water inlet is connected to the machine cooling water outlet flow channel, the cooling effect of the cylinder body is controlled by controlling the opening of the first water inlet, the cooling effect of the oil cooler is controlled by controlling the opening of the third water inlet, the control of the cooling circuit is more precise, and compared with the conventional solution that requires additional pipelines connecting the oil cooler and the thermostat, the third water inlet is connected to the machine cooling water outlet flow channel formed by the cooperation of the cylinder body and the water jacket partition, and there is no need to additionally set up pipelines connecting the oil cooler and the thermostat, thereby simplifying the structure of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is an exploded view of a partial structure of an engine of an embodiment;

[0020] Figure 2 is a cross-sectional view of a cylinder body and a water jacket baffle of an embodiment;

[0021] Figure 3 is a three-dimensional view of a water jacket baffle of an embodiment;

[0022] Figure 4 is a cooling circuit diagram of an engine of an embodiment;

[0023] Figure 5 is a three-dimensional diagram of a thermostat according to an embodiment;

[0024] Figure 6 is a cross-sectional view of an embodiment.

[0025] Description of reference numerals:

[0026] 10-cylinder body, 11-cylinder hole, 12-mounting groove, 121-first side wall, 122-second side wall, 13-cylinder hole water outlet, 14-temperature adjustment water outlet, 15-cylinder hole water inlet, 16-machine cooling water inlet, 17-machine cooling water return port;

[0027] 20-water jacket baffle, 21-plate body, 211-cylinder bore water outlet hole, 212-cylinder bore water inlet hole, 213-cylinder bore flow channel, 22-machine cooling water inlet isolation rib, 221-machine cooling water inlet flow channel; 23-machine cooling water outlet isolation rib, 231-machine cooling water outlet flow channel; 24-cylinder head water inlet isolation rib, 241-cylinder head water inlet flow channel;

[0028] 30-water pump, 31-water pump outlet;

[0029] 40-engine oil cooler, 41-engine cooling water inlet, 42-engine cooling water outlet;

[0030] 50-thermostat, 51-first thermostat, 511-first chamber, 512-first water inlet, 513-first water outlet, 514-fourth water inlet, 515-second water outlet, 516-first control valve; 52-second thermostat, 521-second chamber, 522-second water inlet, 523-fifth water inlet, 524-third water outlet, 525-second control valve, 5251-first valve, 5252-second valve; 53-bypass pipeline, 531-bypass flow channel, 532-third water inlet;

[0031] 60-cylinder head;

[0032] 70-Radiator. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0035] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0036] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] The embodiment of the utility model provides a vehicle, including the engine in the embodiment of the utility model. The vehicle can be a fuel vehicle, a plug-in hybrid vehicle, a range-extended hybrid vehicle, or other vehicle types with an engine, without specific limitation. The first water inlet 512 of the thermostat 50 of the engine in the embodiment of the utility model is connected to the cylinder bore flow channel 213 of the cylinder body 10, and the third water inlet 532 is connected to the machine cooling water outlet flow channel 231 of the cylinder body 10. There is no need to set up an additional pipeline connecting the thermostat 50 and the cylinder body 10, which saves the water inlet pipeline of the thermostat 50 and simplifies the structure of the engine.

[0038] Please refer to Figure 1 and Figure 2 An embodiment of the utility model provides an engine, including a cylinder block 10.

[0039] The engine also includes Figure 1 and Figure 2 The cylinder head 60 (refer to Figure 4 ), crankshaft, connecting rod, piston, oil pan, intake and exhaust mechanism, spark plug, etc. One end of the cylinder block 10 (such as Figure 1 and Figure 2 The upper end shown in the figure) is connected to the cylinder head, and the other end (as shown in the figure) is connected to the cylinder head. Figure 1 and Figure 2 The crankshaft is connected to the bearing seat on the cylinder block 10 near the end of the oil pan, one end of the connecting rod is rotatably connected to the crankshaft, the cylinder block 10 is provided with a cylinder hole 11, the piston is received in the cylinder hole 11, and the other end of the connecting rod is rotatably connected to the piston. The cylinder head is provided with a combustion chamber (not shown), the combustion chamber is connected to the cylinder hole 11, and the intake and exhaust mechanism and the spark plug are arranged on the cylinder head.

[0040] When the engine is working, the intake mechanism delivers air and fuel into the combustion chamber, the spark plug ignites, and the high-temperature and high-pressure gas generated by the combustion of the fuel pushes the piston to perform telescopic movement in the cylinder bore 11, and the exhaust gas is discharged through the exhaust mechanism. In order to control the temperature of the engine to improve the thermal efficiency and ensure that the engine is in the optimal operating range, the embodiment of the utility model also designs a structure for controlling the temperature of the engine.

[0041] Specifically, refer to Figures 1 to 3 The engine of the embodiment of the utility model further includes a water jacket baffle 20. The cylinder block 10 is further provided with a mounting groove 12, a cylinder bore water outlet 13 and a thermostatic water outlet 14. The mounting groove 12 surrounds the outer periphery of the cylinder bore 11. The water jacket baffle 20 is received in the mounting groove 12 and cooperates with the side wall of the mounting groove 12 to form a cylinder bore flow channel 213 and a machine cooling water outlet flow channel 231. The cylinder bore water outlet 13 is communicated with the cylinder bore water outlet hole 211 of the water jacket baffle 20, and further communicated with the cylinder bore flow channel 213. The thermostatic water outlet 14 is communicated with the machine cooling water outlet flow channel 231.

[0042] The mounting groove 12 may surround all or part of the outer circumference of the cylinder hole 11, that is, the mounting groove 12 may be a structure that is connected end to end or not. Correspondingly, the water jacket baffle 20 received in the mounting groove 12 may also be a structure that is connected end to end or not. The mounting groove 12 is opened from the end surface of the cylinder body 10 for connecting with the cylinder head. After the water jacket baffle 20 is installed in the mounting groove 12, the water jacket baffle 20 may be flush with the end surface of the cylinder body 10 for connecting with the cylinder head.

[0043] refer to Figures 1 to 3 The mounting groove 12 includes a first side wall 121 and a second side wall 122 opposite to each other, and the first side wall 121 is close to the cylinder hole 11. The water jacket partition 20 includes a plate body 21, a portion of the inner peripheral surface of the plate body 21 is closely attached to the first side wall 121, and another portion of the first side wall 121 has a spacing distance to form a cylinder hole flow channel 213.

[0044] The outer peripheral surface of the plate body 21 of the water jacket partition 20 is provided with a machine cooling water intake isolation rib 22 and a machine cooling water outlet isolation rib 23. The machine cooling water intake isolation rib 22 is tightly attached to the side wall (second side wall 122) of the installation groove 12 to form a machine cooling water intake flow channel 221, and the machine cooling water outlet isolation rib 23 is tightly attached to the side wall (second side wall 122) of the installation groove 12 to form a machine cooling water outlet flow channel 231.

[0045] The shape of the mounting groove 12 can be adapted to the shape of the cylinder hole 11, and the shape of the water jacket partition 20 can be adapted to the shape of the mounting groove 12, that is, the shape of the water jacket partition 20 is adapted to the shape of the cylinder hole 11. Adaptation means that the wall thickness of the structure from the cylinder hole 11 to the mounting groove 12 is roughly equal, and since the cross section of the inner wall of the cylinder hole 11 is an arc shape, the shape of the water jacket partition 20 is also roughly an arc shape.

[0046] The engine may further include a cylinder gasket (not shown), which is disposed on the end surface of the cylinder block 10 for connection with the cylinder head and closes the mounting groove 12. The cylinder gasket may be provided with corresponding holes as required so that cooling water can flow between the cylinder block 10 and the cylinder head. It should be understood that the cooling water may be ordinary water, water containing a coolant, or a liquid medium such as cooling water, without limitation, and cooling water is used to refer to the liquid medium in the following text.

[0047] refer to Figure 1 The engine further includes a thermostat 50, which is connected to the cylinder body 10. Specifically, the thermostat 50 is directly mounted on the outer surface of the cylinder body 10 without pipeline connection, so as to simplify the structure and improve the integration of the engine. The thermostat 50 has a first water inlet 512 and a third water inlet 532. The first water inlet 512 is connected to the cylinder bore water outlet 13, and the third water inlet 532 is connected to the thermostat water outlet 14. In this way, the connection pipeline between the thermostat 50 and the cylinder body 10 is saved, and the structure of the engine is simplified.

[0048] refer to Figure 1 The engine further includes an oil cooler 40, which has a cooling water inlet 41 and a cooling water outlet 42, and the cylinder block 10 also has a cooling water intake 16 and a cooling water return 17. The oil cooler 40 is directly connected to the cylinder block 10, and the cooling water inlet 41 is connected to the cooling water intake 16, and the cooling water outlet 42 is connected to the cooling water return 17. In this way, the pipeline connecting the oil cooler 40 and the cylinder block 10 can be omitted, which simplifies the structure of the engine and improves the integration of the engine.

[0049] Cooling water flows from the cooling water inlet 16 into the cooling water inlet 41, flows through the oil cooler 40, and then flows out from the cooling water outlet 42 to the cooling water return port 17. The cooling water inlet 16 and the cooling water return port 17 both penetrate the outer surface of the cylinder body 10 to the side wall of the mounting groove 12, and can be surrounded by a pipe joint (not shown) on the outer surface of the cylinder body 10 to facilitate connection with the oil cooler 40.

[0050] Optional, reference Figure 1 and Figure 3 The machine cooling water inlet 16 is connected to the machine cooling water inlet channel 221 , and the machine cooling water return port 17 and the temperature regulating water outlet 14 are both connected to the machine cooling water outlet channel 231 .

[0051] After the cooling water flows into the engine cooling water inlet channel 221, it enters the engine oil cooler 40 through the engine cooling water inlet 16 and the engine cooling water inlet 41, cools the engine oil cooler 40, and then flows into the engine cooling water outlet channel 231 from the engine cooling water outlet 42 and the engine cooling water return port 17. In this way, the connecting pipeline of the engine oil cooler 40 is omitted, and the structure of the engine is simplified.

[0052] The cooling water flows in the cylinder bore flow channel 213 to cool the cylinder body 10 (i.e., the cylinder bore 11), and flows into the thermostat 50 through the cylinder bore water outlet hole 211, the cylinder bore water outlet 13, and the first water inlet 512; the cooling water for cooling the oil cooler 40 flows into the machine cooling water outlet flow channel 231 through the machine cooling water outlet 42 and the machine cooling water return port 17, and then flows into the thermostat 50 from the temperature control water outlet 14 and the third water inlet 532.

[0053] Since the position of fuel combustion is close to the junction of the cylinder body 10 and the cylinder head, the temperature of the junction of the cylinder body 10 and the cylinder head is relatively high, so an installation groove 12 is opened at one end where the cylinder body 10 and the cylinder head are connected. The installation groove 12 is close to the junction of the cylinder body 10 and the cylinder head. The cylinder bore flow channel 213 formed by the water jacket partition 20 in the installation groove 12 and the side wall of the installation groove 12 is relatively close to the high temperature area, and the cooling effect is good. The machine cooling water intake flow channel 221 and the machine cooling water outlet flow channel 231 are connected to the oil cooler 40. The cooling water can flow to the oil cooler 40 through the machine cooling water intake flow channel 221 and flow into the machine cooling water outlet flow channel 231, which can cool the oil cooler 40. There is no need to set up an independent pipeline to connect with the oil cooler 40, which simplifies the structure of the engine. The cooling water of the cylinder bore flow channel 213 and the machine cooling water outlet flow channel 231 flows into the thermostat 50, so that there is no need to set a connecting pipeline between the oil cooler 40 and the thermostat 50.

[0054] refer to Figure 1 The engine further includes a water pump 30, which is connected to the cylinder bore water inlet 15. The water pump 30 is directly connected to the cylinder body 10, and the water pump outlet 31 of the water pump 30 is directly connected to the cylinder bore water inlet 15. In this way, the pipeline connecting the water pump 30 and the cylinder body 10 can be omitted, further simplifying the structure of the engine. The water pump 30 can be a mechanical water pump 30, an electronic water pump 30, etc., without limitation.

[0055] The cylinder body 10 further has a cylinder bore water inlet 15 , which is in communication with the cylinder bore flow passage 213 . The water pump 30 is in communication with the cylinder bore water inlet 15 , so as to supply water to the cylinder bore flow passage 213 .

[0056] refer to Figure 1 and Figure 3 The plate body 21 is also provided with a cylinder bore water inlet hole 212 , and the cylinder head water inlet hole is connected with the cylinder bore water inlet port 15 and the cylinder bore flow channel 213 .

[0057] The outer peripheral surface of the plate body 21 is also provided with a cylinder head water inlet isolating rib 24, and the cylinder head water inlet isolating rib 24 cooperates with the side wall of the mounting groove 12 to enclose a cylinder head water inlet channel 241, and the cylinder head water inlet channel 241 is connected with the cylinder hole water inlet hole 212 and the machine cooling water intake channel 221, and the cylinder head water inlet channel 241 is used to connect to the cylinder head.

[0058] The cooling water delivered by the water pump 30 flows into the cylinder head water inlet channel 241 through the cylinder bore water inlet port 15, a part of it enters the cylinder bore channel 213 through the cylinder bore water inlet hole 212, another part flows into the engine cooling water intake channel 221 and flows into the oil cooler 40, and the rest flows into the cylinder head water inlet channel 241 and is used to flow into the cylinder head.

[0059] refer to Figure 1 and Figure 5 The engine also includes a radiator 70 (reference Figure 4 ), the radiator 70 is connected to the second water outlet 515 and the fifth water inlet 523 of the thermostat 50.

[0060] refer to Figure 1 , Figure 3 and Figure 4 The cooling water delivered by the water pump 30 enters the cylinder body 10 through the water inlet of the water pump 30 and the cylinder bore water inlet 15 and is divided into three paths; the first path enters the cylinder bore flow channel 213 through the cylinder bore water inlet hole 212 to cool the cylinder body 10 (i.e., the cylinder bore 11); the second path enters the cylinder head 60 through the cylinder head water inlet flow channel 241 to cool the cylinder head 60, and the third path enters the oil cooler 40 through the machine cooling water intake flow channel 221 to cool the oil cooler 40. The cooling water of the cylinder bore flow channel 213 for cooling the cylinder body 10 flows into the thermostat 50 (the first thermostat 51) through the cylinder bore water outlet hole 211, the cylinder bore water outlet port 13 and the first water inlet port 512; the cooling water for cooling the cylinder head 60 flows into the thermostat 50 and the radiator 70; the cooling water for cooling the oil cooler 40 enters the machine cooling water outlet flow channel 231 through the machine cooling water outlet port 42 and the machine cooling water return port 17, and enters the thermostat 50 (the second thermostat 52) ​​from the temperature regulating water outlet port 14 and the third water inlet port 532; the cooling water of the radiator 70 flows into the thermostat 50 (the second thermostat 52).

[0061] The thermostat 50 according to the embodiment of the present utility model is described in detail below.

[0062] refer to Figure 5 and Figure 6 An embodiment of the utility model provides a thermostat 50 , including a first thermostat 51 , a second thermostat 52 and a bypass pipeline 53 .

[0063] The first thermostat 51 has a first chamber 511, a first water inlet 512 and a first water outlet 513. One end of the first water inlet 512 is connected to the first chamber 511, and the other end of the first water inlet 512 is used to connect to the cylinder hole flow channel 213. One end of the first water outlet 513 is connected to the first chamber 511. The first thermostat 51 is used to control the opening of the first water inlet 512.

[0064] The second thermostat 52 has a second chamber 521 and a second water inlet 522 . One end of the second water inlet 522 is connected to the second chamber 521 . The second thermostat 52 is used to control the opening of the second water inlet 522 .

[0065] The bypass pipeline is connected to the first thermostat 51 and the second thermostat 52. Specifically, the first thermostat 51, the second thermostat 52 and the bypass pipeline 53 can be integrated into an integrated structure to improve the integration of the engine.

[0066] The bypass pipe has a bypass channel 531 and a third water inlet 532, one end of the bypass channel 531 is connected to the first water outlet 513, the other end of the bypass channel 531 is connected to the second water inlet 522, one end of the third water inlet 532 is connected to the bypass channel 531, and the other end of the third water inlet 532 is used to connect to the machine cooling water outlet channel 231.

[0067] Combination Figure 1 , Figures 3 to 6 , the first thermostat 51 can be a traditional mechanical thermostat 50, which uses the melting and solidification states of the wax bag to switch and control the opening of the first water inlet 512. Among them, the opening of the first water inlet 512 can be 0%-100%. When the opening is 0%, the first water inlet 512 is closed, and the cooling water of the cylinder bore flow channel 213 cannot flow into the first thermostat 51, that is, the cooling water of the cylinder bore flow channel 213 will not flow and take away the heat. When the engine is started, the water temperature of the cylinder body 10 can be quickly increased and the engine can be warmed up quickly. As the engine temperature rises, the opening of the first water inlet 512 gradually increases, and the cooling water of the cylinder bore flow channel 213 can flow to cool the cylinder body 10, which is conducive to keeping the engine in the optimal operating range. When the engine is working in a high-load state, the opening of the first water inlet 512 can be 100%, maximizing the cooling of the cylinder body 10 to ensure the performance and reliability of the engine.

[0068] The second thermostat 52 may be an electronic thermostat 50, which electronically controls the opening of the second water inlet 522. The bypass channel 531 connects the first water outlet 513, the second water inlet 522 and the third water inlet 532. The second water inlet 522 can control the flow rate and on-off of the cooling water flowing from the first water outlet 513 and the third water inlet 532 into the second thermostat 52 through the bypass channel 531. It should be understood that the bypass channel 531 is unidirectionally connected to the first water outlet 513, that is, the cooling water in the first chamber 511 can enter the bypass channel 531 through the first water outlet 513, while the cooling water in the bypass channel 531 cannot flow into the first chamber 511 through the first water outlet 513. Therefore, the cooling water flowing into the bypass flow channel 531 through the third water inlet 532 cannot flow into the first chamber 511 through the first water outlet 513, but can only flow into the second chamber 521 through the second water inlet 522. The opening degree of the second water inlet 522 can be 0%-100%. When the opening degree is 0%, the second water inlet 522 is closed, and the cooling water in the bypass flow channel 531 cannot flow into the second chamber 521 through the second water inlet 522, that is, the third water inlet 532 is in a closed state, and the cooling water in the oil cooler 40 will not flow. When the engine is started, the temperature of the oil in the engine is low, and there is no need to exchange heat with the cooling water through the oil cooler 40 for cooling, which can make the oil temperature rise quickly, which is conducive to rapid warm-up. As the temperature of the engine increases, the temperature of the oil increases, the opening of the second water inlet 522 gradually increases, and the cooling water in the bypass flow channel 531 can flow, so that the cooling water in the oil cooler 40 flows and exchanges heat with the oil with a higher temperature to ensure that the oil is in the optimal temperature range. When the engine is working under high load, the opening of the second water inlet 522 can be 100%, maximizing the cooling of the oil cooler 40 to ensure the performance and reliability of the engine.

[0069] The conventional thermostat 50 has only an entrance to the first chamber 511, that is, only the first water inlet 512 in the present invention, but no third water inlet 532. Therefore, it is difficult for the conventional thermostat 50 to control the cooling effect of the oil cooler 40, and the temperature control of the engine is not precise and accurate enough. Even if a pipeline is added to the conventional thermostat 50 to connect the thermostat 50 to control the cooling effect of the oil cooler 40, an additional pipeline is usually added to connect the thermostat 50 and the oil cooler 40.

[0070] The thermostat 50 provided in the embodiment of the utility model is provided with a first thermostat 51, a second thermostat 52 and a bypass pipeline 53. The first thermostat 51 has a first water inlet 512 and a first water outlet 513, the second thermostat 52 has a second water inlet 522, the bypass flow channel 531 is connected to the first water outlet 513, the second water inlet 522 and the third water inlet 532, and the first water inlet 512 is connected to the cylinder bore flow channel 213, and the third water inlet 532 is connected to the machine cooling water outlet flow channel 231. By controlling the first water inlet The opening of 512 is used to control the cooling effect of the cylinder block 10, and the opening of the third water inlet 532 is controlled to control the cooling effect of the oil cooler 40. The control of the cooling circuit is more precise. Compared with the conventional solution that requires additional pipes connecting the oil cooler 40 and the thermostat 50, the third water inlet 532 is connected to the machine cooling water outlet channel 231 formed by the cylinder block 10 and the water jacket partition 20. There is no need to set up additional pipes connecting the oil cooler 40 and the thermostat 50, which simplifies the structure of the engine.

[0071] Optional, reference Figures 4 to 6 The first thermostat 51 also has a fourth water inlet 514 and a second water outlet 515 , both of which are connected to the first chamber 511 . The fourth water inlet 514 is used to connect to the cylinder head 60 , and the second water outlet 515 is used to connect to the radiator 70 .

[0072] The cylinder head and the fourth water inlet 514 may be connected by a separate pipeline, and cooling water for cooling the cylinder head flows into the first chamber 511 through the fourth water inlet 514. The second water outlet 515 and the radiator 70 may be connected by a separate pipeline.

[0073] The first water outlet 513, the second water outlet 515 and the fourth water inlet 514 are in a normally open state, that is, the cooling water entering the first chamber 511 through the fourth water inlet 514 can flow into the bypass pipe 53 from the first water outlet 513, or flow into the radiator 70 from the second water outlet 515. The first thermostat 51 is used to control the opening of the first water inlet 512 according to the temperature of the cooling water entering through the fourth water inlet 514. When the engine is started, the temperature of the cylinder head 60 is not high. After the cooling water with a lower temperature of the cylinder head 60 enters the first chamber 511 through the fourth water inlet 514, the first thermostat 51 will not open the first water inlet 512, so that the cooling water for cooling the cylinder body 10 will not flow, and the engine will be warmed up quickly. After the engine has been running for a period of time, the temperature of the cylinder head 60 increases. After the cooling water with a higher temperature of the cylinder head 60 enters the first chamber 511 through the fourth water inlet 514, the first thermostat 51 opens the first water inlet 512, and can control the opening size of the first water inlet 512 according to the temperature of the cooling water entering from the fourth water inlet 514, so as to control the flow rate of the cooling water flowing in the cylinder bore flow channel 213, thereby achieving control of different cooling effects on the cylinder body 10.

[0074] Optional, reference Figures 4 to 6 The second thermostat 52 also has a fifth water inlet 523 and a third water outlet 524. The fifth water inlet 523 and the third water outlet 524 are both connected to the second chamber 521. The fifth water inlet 523 is used to connect to the radiator 70, and the third water outlet 524 is used to connect to the water pump 30. The second thermostat 52 is also used to control the opening of the fifth water inlet 523.

[0075] The fifth water inlet 523 and the radiator 70 may be connected via a pipeline, and the cooling water flowing out of the second water outlet 515 of the first thermostat 51 flows into the radiator 70 for heat dissipation, and then flows back to the fifth water inlet 523 of the second thermostat 52. The third water outlet 524 and the inlet of the water pump 30 may be connected via a pipeline, and the cooling water of the second chamber 521 flows into the water pump 30 through the third water outlet 524. It should be understood that the second chamber 521 and the third water outlet 524 are in a normally open state.

[0076] The second thermostat 52 can use electronic control to control the opening of the fifth water inlet 523 to control the flow rate and on-off of the 20 million water entering the second chamber 521 through the fifth water inlet 523. The opening of the fifth water inlet 523 can be 0%-100%. When the opening is 0%, the fifth water inlet 523 is closed, and the cooling water of the fifth water inlet 523 cannot enter the second chamber 521, that is, the cooling water of the radiator 70 cannot enter the second chamber 521 and flow, and the radiator 70 does not participate in the circulation of the cooling circuit. When the engine is started, the temperature of the engine is relatively low. According to the above description, the first water inlet 512 of the first thermostat 51 is closed, and the cooling water of the cylinder bore flow channel 213 will not enter the first chamber 511. Although the cooling water of the cylinder head 60 enters the radiator 70 through the fourth water inlet 514 and the second water outlet 515, the fifth water inlet 523 is controlled to be closed at this time, so the cooling water of the radiator 70 will not enter the second chamber 521, and the radiator 70 will not participate in the circulation of the cooling circuit, and can be quickly warmed up. After the engine has been running for a period of time, the temperature of the engine increases, and the opening of the fifth water inlet 523 can be controlled to gradually increase. The cooling water entering the radiator 70 through the second water outlet 515 can enter the second chamber 521 through the fifth water inlet 523, and then flow into the water pump 30 through the third water outlet 524, so that the radiator 70 participates in the circulation of the cooling circuit. The radiator 70 dissipates heat and cools the cooling water to reduce the temperature of the cooling water in the cooling circuit and ensure that the engine is in the optimal temperature range. When the engine is operating at a high load, the opening degree of the fifth water inlet 523 can be 100%, maximizing the use of the radiator 70 to cool the cooling water and ensuring the performance and reliability of the engine.

[0077] refer to Figure 5 and Figure 6 The first thermostat 51 includes a first control valve 516, which is accommodated in the first chamber 511 and is used to adjust the opening of the first water inlet 512 according to the temperature of the fourth water inlet 514. The first control valve 516 is automatically controlled by its own structure, and its specific structure is not limited. It may include a wax bag and other structures. After the cooling water of the cylinder head enters the second chamber 521 through the fourth water inlet 514, it is poured on the wax bag of the second control valve 525. According to the temperature of the cooling water, the wax bag will melt or solidify, thereby expanding or contracting, thereby controlling the opening of the first water inlet 512.

[0078] refer to Figure 5 and Figure 6 The second thermostat 52 includes a second control valve 525, which is accommodated in the second chamber 521, and is used to control the opening of the second water inlet 522, and / or the second control valve 525 is used to control the opening of the fifth water inlet 523.

[0079] The second control valve 525 is electronically controlled, and its specific structure is not limited. The second control valve 525 can independently control the opening of the second water inlet 522 and the fifth water inlet 523, or can simultaneously control the opening of the second water inlet 522 and the fifth water inlet 523, and its specific principle is not limited.

[0080] Optional, reference Figure 6 The second control valve 525 includes a first valve 5251 and a second valve 5252 which are arranged at intervals. The first valve 5251 is used to control the opening of the second water inlet 522, and the second valve 5252 is used to control the opening of the fifth water inlet 523. The first valve 5251 and the second valve 5252 are controlled in linkage so that when the first valve 5251 is closed, the second valve 5252 is opened, and when the first valve 5251 is opened, the second valve 5252 is closed.

[0081] The linkage control of the first valve 5251 and the second valve 5252 means that the total opening of the first valve 5251 and the second valve 5252 is 100%. For example, if the opening of the first valve 5251 is 0%, the opening of the second valve 5252 is 100%, that is, the first valve 5251 is closed, the second water inlet 522 is closed, the second valve 5252 is fully open, and the fifth water inlet 523 is fully open; for another example, if the opening of the first valve 5251 is 50%, the opening of the second valve 5252 is 50%, that is, the first valve 5251 and the second valve 5252 are both half open, and the second water inlet 522 and the fifth water inlet 523 are both half open. For another example, if the opening of the first valve 5251 is 100% and the opening of the second valve 5252 is 0%, the first valve 5251 is fully open, the second water inlet 522 is fully open, the second valve 5252 is closed, and the fifth water inlet 523 is closed.

[0082] The first valve 5251 and the second valve 5252 are arranged to be controlled in linkage, so that the flow path of the cooling water can be easily controlled.

[0083] Combination Figure 1 , Figures 3 to 6 The utility model is described with some specific embodiments. The flow path of cooling water is as follows:

[0084] In the first case, when the engine is started, the first control valve 516 is closed, the first valve 5251 of the second control valve 525 is closed, and the second valve 5252 is opened. The water of the water pump 30 flows through the cylinder head, the fourth water inlet 514 of the first thermostat 51, the first chamber 511, and the second water outlet 515, and then enters the radiator 70. The cooling water of the radiator 70 enters the second chamber 521 through the fifth water inlet 523 and then flows back to the water pump 30 through the third water outlet 524. In this case, no cooling water flows in the cooling circuit for cooling the cylinder block 10 and the oil cooler 40, and the cylinder block 10 can be quickly warmed up, while the temperature of the cylinder head is relatively high, and cooling water flows in the cooling circuit flowing through the cylinder head and dissipates heat through the radiator 70, so that the cylinder head can be cooled.

[0085] In the second case, after the engine has been running for a period of time, the engine temperature rises, the first control valve 516 is opened, the first valve 5251 of the second control valve 525 is opened, and the second valve 5252 is closed. The first cooling water of the water pump 30 flows through the cylinder head and the fourth water inlet 514 of the first thermostat 51 into the first chamber 511, the second cooling water of the water pump 30 flows through the cylinder body 10 (i.e., the cylinder bore flow channel 213) and then enters the first chamber 511 through the first water inlet 512, the third cooling water of the water pump 30 flows through the oil cooler 40 and then enters the bypass flow channel 531 from the third water inlet 532, the two cooling waters entering the first chamber 511 flow into the bypass pipeline 53 through the first water outlet 513, and after merging with the third cooling water, enter the second chamber 521 from the second water inlet 522, and flow back to the water pump 30 from the third water outlet 524.

[0086] In the third case, when the engine is working under high load, the engine temperature is very high and needs to be cooled down in time, the first control valve 516 is opened, the first valve 5251 of the second control valve 525 is closed, and the second valve 5252 is opened. The first cooling water of the water pump 30 flows through the cylinder head and the fourth water inlet 514 of the first thermostat 51 into the first chamber 511, and the second cooling water of the water pump 30 flows through the cylinder body 10 (i.e., the cylinder bore flow channel 213) and then enters the first chamber 511 through the first water inlet 512. The two cooling waters entering the first chamber 511 flow into the radiator 70 through the first water outlet 513, and after the heat is dissipated by the radiator 70, they enter the second chamber 521 from the fifth water inlet 523 and flow back to the water pump 30 from the third water outlet 524. In this case, the water temperature is very high, and it is impossible to exchange heat with the oil cooler 40 to reduce the temperature of the oil, so it is not necessary for the oil cooler 40 to be not in the flow path of the cooling water.

[0087] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0088] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A thermostat, characterized in that: include: A first thermostat, comprising a first chamber, a first water inlet and a first water outlet, wherein one end of the first water inlet is connected to the first chamber, the other end of the first water inlet is used to be connected to the cylinder hole flow channel, one end of the first water outlet is connected to the first chamber, and the first thermostat is used to control the opening of the first water inlet; a second thermostat, comprising a second chamber and a second water inlet, one end of the second water inlet being connected to the second chamber, and the second thermostat being used to control the opening of the second water inlet; A bypass pipe is connected to the first thermostat and the second thermostat; the bypass pipe has a bypass flow channel and a third water inlet, one end of the bypass flow channel is connected to the first water outlet, the other end of the bypass flow channel is connected to the second water inlet, one end of the third water inlet is connected to the bypass flow channel, and the other end of the third water inlet is used to connect to the machine cooling water outlet flow channel.

2. The thermostat according to claim 1, characterized in that: The first thermostat also has a fourth water inlet and a second water outlet, both of which are connected to the first chamber, the fourth water inlet is used to connect to the cylinder head, and the second water outlet is used to connect to the radiator.

3. The thermostat according to claim 2, characterized in that: The second thermostat also has a fifth water inlet and a third water outlet, both of which are connected to the second chamber, the fifth water inlet is used to connect to the radiator, the third water outlet is used to connect to the water pump, and the second thermostat is also used to control the opening of the fifth water inlet.

4. The thermostat according to claim 3, characterized in that: The first thermostat includes a first control valve, which is accommodated in the first chamber and is used to adjust the opening of the first water inlet according to the temperature of the fourth water inlet.

5. The thermostat according to claim 3, characterized in that: The second thermostat includes a second control valve, which is accommodated in the second chamber. The second control valve is used to control the opening of the second water inlet, and / or the second control valve is used to control the opening of the fifth water inlet.

6. The thermostat according to claim 5, characterized in that: The second control valve includes a first valve and a second valve arranged at intervals, the first valve is used to control the opening of the second water inlet, and the second valve is used to control the opening of the fifth water inlet; the first valve and the second valve are controlled in linkage so that when the first valve is closed, the second valve is opened, and when the first valve is opened, the second valve is closed.

7. An engine, characterized in that: It comprises a cylinder body, a water jacket baffle and a thermostat as claimed in any one of claims 1 to 6, wherein the cylinder body has a cylinder hole, a mounting groove, a cylinder hole water outlet and a thermostatic water outlet, the mounting groove surrounds the outer circumference of the cylinder hole, the water jacket baffle is received in the mounting groove and cooperates with the side wall of the mounting groove to form a cylinder hole flow channel and a machine cooling water outlet flow channel, the cylinder hole water outlet is communicated with the cylinder hole flow channel, and the thermostatic water outlet is communicated with the machine cooling water outlet flow channel; the thermostat is connected to the cylinder body, and the first water inlet is communicated with the cylinder hole water outlet, and the third water inlet is communicated with the thermostatic water outlet.

8. The engine according to claim 7, characterized in that The engine also includes a water pump and an oil cooler. The cylinder body also has a cylinder bore water inlet, a machine cooling water intake and a machine cooling water return port. The cylinder bore water inlet is connected to the cylinder bore flow channel, the water pump is connected to the cylinder bore water inlet, the water jacket baffle cooperates with the side wall of the mounting groove to form a machine cooling water intake flow channel, the machine cooling water intake flow channel is connected to the cylinder bore water inlet, the machine cooling water intake is connected to the machine cooling water intake flow channel, the machine cooling water return port is connected to the machine cooling water outlet flow channel, and the oil cooler is connected to the machine cooling water intake port and the machine cooling water return port.

9. The engine according to claim 8, characterized in that The water jacket baffle includes a plate body, a machine cooling water intake isolating rib and a machine cooling water outlet isolating rib, the machine cooling water intake isolating rib and the machine cooling water outlet isolating rib are arranged on the outer peripheral surface of the plate body, the machine cooling water intake isolating rib is tightly attached to the side wall of the installation groove to enclose the machine cooling water intake flow channel, and the machine cooling water outlet isolating rib is tightly attached to the side wall of the installation groove to enclose the machine cooling water outlet flow channel.

10. The engine according to claim 7, characterized in that The engine further comprises a radiator, and the radiator is in communication with the second water outlet and the fifth water inlet of the thermostat.

11. A vehicle, characterized in that: Comprising an engine as claimed in any one of claims 7 to 10.

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