An integrated cylinder head structure

Abstract

The application discloses an integrated cylinder head structure, characterized in that: a thermostat is arranged in a water jacket cavity on one side of the front end of an engine body cylinder head water jacket; a water pump is arranged on the top of the front end of the engine body cylinder head water jacket; the engine body cylinder head water jacket is connected with a hydraulic buffer through a first pipeline; the hydraulic buffer is connected with the thermostat through a second pipeline; a small circulation outlet of the thermostat is connected with the water pump through a small circulation pipeline; a large circulation outlet of the thermostat is connected with a cooling water tank through a large circulation pipeline; and the cooling water tank is connected with the water pump through a third pipeline. The thermostat is arranged on the front end of the engine body cylinder head water jacket, the pipeline from the thermostat to the water pump and the pipeline from the thermostat to the cooling water tank are greatly shortened, the water pipeline is simplified, the related parts are reduced, the cost is lowered, the thermostat is arranged more compactly, and the space utilization rate of the engine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to an integrated cylinder head structure. BACKGROUND

[0002] With the increasing demand for safety performance of commercial vehicles, the engine configuration hydraulic retarder has also become a trend in the market industry. The hydraulic retarder can provide reliable auxiliary braking, especially on long downhill sections, while effectively reducing the wear of the brake, prolonging the service life of the tire, improving the operation rate and safety of the vehicle.

[0003] The use of the hydraulic retarder requires the engine to provide cooling water for cooling. After the cooling water cools the engine, it cools the hydraulic retarder, and then passes through the thermostat and enters the small circulation according to the water temperature to enter the engine or enters the large circulation to enter the cooling water tank.

[0004] The prior art adopts an external thermostat scheme, which installs the thermostat on the water path after the cooling hydraulic buffer. The external thermostat arrangement is not only not compact enough, but also causes complex water pipe lines and reduces the engine space utilization. SUMMARY

[0005] The present application provides an integrated cylinder head structure. It comprises an engine body cylinder head water jacket, a water pump, a hydraulic buffer, a thermostat, a cooling water tank, a thermostat small circulation water outlet, a thermostat large circulation water outlet, a first pipe line, a second pipe line, a small circulation pipe line, a large circulation pipe line and a third pipe line.

[0006] The thermostat is arranged in the water jacket cavity on one side of the front end of the engine body cylinder head water jacket;

[0007] The water pump is arranged on the top of the front end of the engine body cylinder head water jacket;

[0008] The engine body cylinder head water jacket is connected to the hydraulic buffer through the first pipe line;

[0009] The hydraulic buffer is connected to the thermostat through the second pipe line;

[0010] The thermostat small circulation water outlet is connected to the water pump through the small circulation pipe line;

[0011] The thermostat large circulation water outlet is connected to the cooling water tank through the large circulation pipe line;

[0012] The cooling water tank is connected to the water pump through the third pipe line.

[0013] Optionally, the thermostat small cycle water outlet, the thermostat large cycle water outlet, the first pipeline, the second pipeline, the small cycle pipeline, the large cycle pipeline and the third pipeline are arranged outside the engine cylinder head jacket.

[0014] Optionally, the hydraulic buffer is arranged outside the rear end side of the engine cylinder head jacket.

[0015] Optionally, the cooling water tank is arranged outside the front end side of the engine cylinder head jacket.

[0016] Optionally, the thermostat is internally provided with a sensor for measuring the temperature of the cooling liquid.

[0017] Optionally, the thermostat is internally provided with a first valve and a second valve, the first valve is connected with the small cycle pipeline, and the second valve is connected with the large cycle pipeline.

[0018] Optionally, the cooling liquid flows from the engine cylinder head through the first pipeline, passes through the hydraulic buffer, and then flows into the thermostat through the second pipeline, and the thermostat judges whether the water temperature meets the standard through the sensor.

[0019] Optionally, the thermostat judges whether the water temperature meets the standard through the sensor; if it meets the standard, the thermostat opens the first valve, and the cooling liquid flows to the water pump through the small cycle pipeline; if it does not meet the standard, the thermostat opens the second valve, and the cooling liquid flows to the cooling water tank for cooling through the large cycle pipeline.

[0020] Optionally, the cooled cooling liquid flows to the water pump through the third pipeline.

[0021] Optionally, a sealing gasket is arranged at the connection part of the outlet of the engine cylinder head jacket and the first pipeline.

[0022] From the above technical solutions, the present application has the following advantages:

[0023] 1. The thermostat is arranged at the front end of the engine cylinder head jacket, the pipelines from the thermostat to the water pump and from the thermostat to the cooling water tank are greatly shortened, the water pipe pipeline is simplified, the related parts are reduced, and the cost is reduced.

[0024] 2. The thermostat is arranged at the front end of the engine cylinder head jacket, so that the thermostat is arranged more compactly, and the space utilization rate of the engine is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a structural schematic view of an integrated cylinder head;

[0026] Fig. 2 Another structure diagram of the integrated cylinder head;

[0027] Fig. 3 A sectional view of a thermostat in the integrated cylinder head. DETAILED DESCRIPTION

[0028] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to illustrate the relative positional relationship between the components or constituent parts, and do not particularly limit the specific installation orientation of the components or constituent parts.

[0029] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific circumstances.

[0030] In addition, the terms "mount", "set", "provided with", "connected", "connected to" should be broadly understood. For example, it can be a fixed connection, a detachable connection, or a monolithic structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, elements or constituent parts. Those of ordinary skill in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific circumstances.

[0031] In addition, the structures, proportions, sizes, etc. shown in the drawings in the present application are only used to cooperate with the content disclosed in the specification, to enable those skilled in the art to understand and read, and do not have technical significance, and any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, still falls within the scope of the technical content disclosed in the present application.

[0032] The technical solutions in the present application will be described clearly and completely in the present application in combination with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present application.

[0033] Embodiment one, please refer to Figs. 1-3The application provides an integrated cylinder head structure, comprising: an engine body cylinder head water jacket 01, a water pump 02, a hydraulic buffer 03, a thermostat 04, a cooling water tank 05, a thermostat small circulation water outlet 06, a thermostat small circulation water outlet 07, a first pipeline 08, a first pipeline 09, a small circulation pipeline 10, a large circulation pipeline 11 and a third pipeline 12.

[0034] The thermostat 04 is arranged in the water jacket cavity on the front end side of the engine body cylinder head water jacket 01; the engine body cylinder head water jacket 01 and the thermostat 04 are provided with through holes, bolts matched with the through holes are screwed into the through holes of the engine body cylinder head water jacket 01 and the thermostat 04, and the thermostat 04 is fixed on the engine body cylinder head water jacket 01 in a bolt fixing mode. The thermostat 04 adjusts the temperature of the cooling liquid by sensing the temperature of the cooling liquid, and is arranged in the water jacket cavity on the front end side of the engine body cylinder head water jacket 01, so that the change of the engine cooling liquid can be directly sensed, and a timely reaction can be made.

[0035] The water pump 02 is arranged on the top of the front end of the engine body cylinder head water jacket 01; the water pump 02 is used for conveying liquid or pressurizing liquid, and the water jacket is arranged on the top of the front end of the engine body cylinder head water jacket 01, so that the flow of the cooling liquid can be assisted by gravity, the cooling liquid can quickly reach each position of the engine, the power of the water pump 02 can be reduced, and the utilization rate of space can be improved.

[0036] The engine body cylinder head water jacket 01 is connected with the hydraulic buffer 03 through the first pipeline 08; the hydraulic buffer 03 buffers the cooling liquid in the engine, the cooling liquid flows to the hydraulic buffer 03 from the engine water outlet through the first pipeline 08, and the hydraulic buffer 03 slows down the flow rate of the cooling liquid. The hydraulic buffer 03 is connected with the thermostat 04 through the first pipeline 09; after the flow rate of the cooling liquid is slowed down by the hydraulic buffer 03, the cooling liquid flows into the thermostat 04 through the first pipeline 09.

[0037] The thermostat small circulation water outlet 06 is connected with the water pump 02 through the small circulation pipeline 10; the thermostat small circulation water outlet 07 is connected with the cooling water tank 05 through the large circulation pipeline 11; and the cooling water tank 05 is connected with the water pump 02 through the third pipeline 12. When the working temperature of the engine is low, the thermostat 04 opens the first valve 13 to make the cooling liquid flow to the water pump 02. The cooling liquid can flow into the water pump 02 from the thermostat 04 through the small circulation pipeline 10, and then be sent back to the engine body cylinder head water jacket 01 by the water pump 02 for circulation. When the working temperature of the engine is high, the thermostat 04 closes the first valve 13 leading to the water pump 02 and opens the second valve 14, the cooling liquid is cooled in the cooling water tank 05 first, then flows into the water pump 02 through the third pipeline 12, and then is sent back to the engine body cylinder head water jacket 01 by the water pump 02, so that the cooling effect of the cooling liquid is enhanced, and the overheating of the engine is avoided.

[0038] Optionally, a sealing gasket is arranged at the connecting part between the outlet of the engine cylinder head water jacket 01 and the first pipeline 08 to prevent leakage of the coolant during circulation.

[0039] Optionally, the thermostat small circulation outlet 06, the thermostat small circulation outlet 07, the first pipeline 08, the first pipeline 09, the small circulation pipeline 10, the large circulation pipeline 11 and the third pipeline 12 are arranged outside the engine cylinder head water jacket 01. The thermostat small circulation outlet 06 is used to connect the small circulation pipeline 10, and the thermostat small circulation outlet 07 is used to connect the large circulation pipeline 11; the first pipeline 08 is arranged at the bottom of the engine cylinder head water jacket 01 and is used to transport the coolant from the engine cylinder head water jacket 01 to the hydraulic buffer 03; the first pipeline 09 is arranged at the bottom of the first pipeline 08 and is used to transport the coolant from the hydraulic buffer 03 to the thermostat 04; the small circulation pipeline 10 is arranged at the top of the thermostat 04 and is used to transport the coolant from the thermostat 04 to the water pump 02; the large circulation pipeline 11 is arranged at one side of the thermostat 04 and is used to transport the coolant from the thermostat 04 to the cooling water tank 05; and the third pipeline 12 is arranged at one side of the coolant and is used to transport the coolant from the cooling water tank 05 to the water pump 02.

[0040] Optionally, the hydraulic buffer 03 is arranged outside the engine cylinder head water jacket 01 at the rear end.

[0041] Optionally, the cooling water tank 05 is arranged outside the engine cylinder head water jacket 01 at the front end.

[0042] In this embodiment, the thermostat 04 is arranged at the front end of the engine cylinder head water jacket 01, and the pipelines from the thermostat 04 to the water pump 02 and from the thermostat 04 to the cooling water tank 05 are greatly shortened, which simplifies the water pipeline, reduces the related parts and lowers the cost. Arranging the thermostat 04 at the front end of the engine cylinder head water jacket 01 makes the thermostat 04 more compact and improves the space utilization of the engine.

[0043] Embodiment two, please refer to Figs. 1-3 After the coolant flows through the hydraulic buffer 03 to slow down the flow rate, the coolant flows into the thermostat 04. The thermostat 04 is a device for controlling the engine cooling system, which adjusts the flow of the coolant by measuring the temperature of the coolant to make the engine work in the optimal temperature range.

[0044] The cooling liquid flows from the outlet of the engine cylinder cover through the first pipeline 08, passes through the hydraulic buffer 03, and then flows into the thermostat 04 through the first pipeline 09. The thermostat 04 is internally provided with a sensor for measuring the temperature of the cooling liquid. When the cooling liquid flows through the thermostat 04, the sensor measures the temperature of the cooling liquid. The thermostat 04 is internally further provided with a first valve 13 and a second valve 14. The first valve 13 is connected with the small circulation pipeline 10, and the second valve 14 is connected with the large circulation pipeline 11. The thermostat 04 determines the opened valve according to the measured temperature.

[0045] When the cooling liquid flows through the thermostat 04, the sensor measures the temperature of the cooling liquid. The thermostat 04 determines whether the water temperature meets the standard according to the measured temperature. If the standard is met, the thermostat 04 closes the second valve 14 and opens the first valve 13, so that the cooling liquid flows into the water pump 02 through the small circulation pipeline 10. If the standard is not met, the thermostat 04 closes the first valve 13 and opens the second valve 14, so that the cooling liquid flows to the cooling water tank 05 through the large circulation pipeline 11 for cooling. The cooled cooling liquid then flows to the water pump 02 through the third pipeline 12.

[0046] In the embodiment, the thermostat 04 automatically adjusts the flow direction of the cooling liquid according to the temperature of the cooling liquid, so that the engine can work in the optimal temperature range, the overheat reaction or overcooling reaction of the engine is avoided, the service life of the engine is prolonged, and the efficiency of the engine is improved.

[0047] It should be noted that the above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated cylinder head structure, characterized in that: include: Engine cylinder head water jacket, water pump, hydraulic buffer, thermostat, cooling water tank, thermostat small circulation water outlet, thermostat large circulation water outlet, first pipeline, second pipeline, small circulation pipeline, large circulation pipeline and third pipeline; The thermostat is arranged in the water jacket cavity at one side of the front end of the cylinder head water jacket of the engine body; The water pump is arranged at the top of the front end of the water jacket of the cylinder head of the engine body; The engine block cylinder head water jacket is connected to the hydraulic buffer via the first pipeline; The hydraulic buffer is connected to the thermostat through the second pipeline; The small circulation water outlet of the thermostat is connected to the water pump through the small circulation pipeline; The large circulation water outlet of the thermostat is connected to the cooling water tank through the large circulation pipeline; The cooling water tank is connected to the water pump via the third pipeline; the thermostat small circulation water outlet, the thermostat large circulation water outlet, the first pipeline, the second pipeline, the small circulation pipeline, the large circulation pipeline, and the third pipeline are arranged outside the cylinder head water jacket of the engine body; a sensor is arranged inside the thermostat for measuring the temperature of the coolant; A first valve and a second valve are provided inside the thermostat. The first valve is connected to the small circulation pipeline, and the second valve is connected to the large circulation pipeline.

2. The integrated cylinder head structure according to claim 1, characterized in that: The hydraulic buffer is arranged outside the rear end side of the cylinder head water jacket of the engine body.

3. The integrated cylinder head structure according to claim 1, characterized in that: The cooling water tank is arranged outside the front end side of the cylinder head water jacket of the engine body.

4. The integrated cylinder head structure according to claim 1, characterized in that: The coolant flows from the engine cylinder head through the first pipeline, passes through the hydraulic buffer, and then flows into the thermostat through the second pipeline. The thermostat determines whether the water temperature meets the standard through the sensor.

5. The integrated cylinder head structure according to claim 4, characterized in that: The thermostat determines whether the water temperature meets the standard through the sensor; If the standard is met, the thermostat opens the first valve, and the coolant flows to the water pump through the small circulation pipeline; If the standard is not met, the thermostat opens the second valve, and the coolant flows through the large circulation pipeline to the cooling water tank for cooling.

6. The integrated cylinder head structure according to any one of claims 4 or 5, characterized in that: The cooled coolant flows to the water pump through the third pipeline.

7. The integrated cylinder head structure according to claim 6, characterized in that: A sealing gasket is provided at the connection portion between the outlet of the engine body cylinder head water jacket and the first pipeline.

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