Structure for improving starting capability of engine in low-temperature state

Abstract

The utility model relates to a structure for improving the starting capability of an engine in a low-temperature state, which relates to the technical field of automobile part design, and comprises an engine main water pipe, a water inlet pipe I, a heating device, a water inlet pipe II, a urea box, a water return pipe and an engine water inlet pipe which are sequentially connected, and the heating device is further connected with an ECU (Electronic Control Unit) and a fuel tank. According to the structure for improving the low-temperature starting capacity of the engine, the cooling liquid heating device 3 is connected in series on the basis of an original heating pipeline of the urea box 5, the structure arrangement is simple, operation is convenient, cost is relatively low, the low-temperature adaptive capacity of a vehicle can be improved by-10 DEG C to-15 DEG C, and the environment adaptive capacity of the vehicle is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts design, in particular to a structure for improving the cold start ability of an engine at low temperature. Background Art

[0002] As is well known, in urban construction, various commercial vehicles and engineering models are widely used, and their operating environments are also diverse, ranging from high-temperature regions to low-temperature regions. Especially in low-temperature environments, it is a great challenge to the starting ability of the engine. Generally speaking, the low-temperature starting environment that the engine adapts to is -30°C. If the cold start ability needs to be further improved, it is necessary to further optimize the structural configuration of the engine. Usually, the solutions include increasing the explosion pressure of the engine, optimizing in-cylinder combustion, increasing the power of the starter, using power supply devices such as batteries to heat the engine coolant and intake air, etc. In these solutions, large technical accumulation or cost increase is often required, resulting in the inability to be widely applied in actual products.

[0003] Therefore, it is necessary to provide a structure for improving the low-temperature starting ability of the engine with simple layout, convenient operation and relatively low cost. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a structure for improving the low-temperature starting ability of the engine with simple layout, convenient operation and relatively low cost.

[0005] In order to achieve the above purpose, the technical solution of the utility model provides a structure for improving the starting ability of the engine in a low-temperature state, including an engine main water pipe, a first water inlet pipe, a heating device, a second water inlet pipe, a urea tank, a return water pipe, and an engine water inlet pipe connected in sequence. The heating device is also connected with an ECU and a fuel tank.

[0006] Preferably, the heating device draws water from the engine main water pipe.

[0007] Preferably, the return water of the heating device returns to the second water inlet pipe of the urea tank.

[0008] Preferably, the ECU controls the opening and closing of the heating device according to the threshold value of the coolant temperature.

[0009] Preferably, the heating function of the heating device comes from the fuel in the vehicle fuel tank.

[0010] Preferably, the heating device has two layers of cavities. The inner cavity is a water circulation pipeline, and the outer cavity is a combustion heating layer; the opening of its heating function is controlled by the ECU.

[0011] The structure for improving the starting ability of the engine in a low-temperature state of the utility model has the following beneficial effects compared with the prior art:

[0012] 1) The inlet and outlet water pipes of the urea tank are conventional configurations of the engine. The coolant heating device is installed in the original inlet water pipe, which has little impact on the vehicle layout, simple structure and convenient assembly;

[0013] 2) Using the water pipe of the urea tank to heat the engine coolant has an obvious effect on improving the cold start ability of the engine. It can adapt to low temperature environment and increase by -10~-15℃;

[0014] 3) The heating device does not use the vehicle battery for heating to ensure the cold start ability of the battery for the engine. Description of the Drawings

[0015] Figure 1 It is the front view of the structure for improving the starting ability of the engine in low temperature state of the present utility model;

[0016] Figure 2 It is the top view of the structure for improving the starting ability of the engine in low temperature state of the present utility model.

[0017] Reference Signs: 1, engine main water pipe; 2, first inlet water pipe; 3, heating device; 4, second inlet water pipe; 5, urea tank; 6, return water pipe; 7, engine inlet water pipe; 8, ECU; 9, fuel pipeline; 10, fuel tank. Detailed Description of the Invention

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0019] The embodiment of the present utility model discloses a structure for improving the starting ability of the engine in low temperature state, which includes an engine main water pipe 1, a first inlet water pipe 2, a heating device 3, a second inlet water pipe 4, a urea tank 5, a return water pipe 6, an engine inlet water pipe 7, an ECU 8, a fuel pipeline 9, and a fuel tank 10; wherein, the heating function of the heating device 3 comes from the fuel in the vehicle fuel tank, and it is a device for heating water by burning diesel, which is connected in series in the water pipe for heating the urea tank 5, and the heating device 3 takes water from the engine main water pipe 1.

[0020] Further, the first inlet water pipe 2 connects the engine main water pipe 1 and the heating device 3; the coolant flows out from the engine main water pipe 1, passes through the first inlet water pipe 2, and flows into the water intake of the heating device 3;

[0021] Further, the second water inlet pipe 4 connects the heating device 3 and the urea tank 5; the coolant flows out from the water return port of the heating device 3, passes through the second water inlet pipe 4, and flows into the urea tank 5;

[0022] Further, the water return pipe 6 connects the urea tank 5 and the engine water inlet pipe 7; the coolant flows out from the water return port of the urea tank 5, passes through the water return pipe 6, and flows into the engine water inlet pipe 7;

[0023] Further, the heating device 3 has two layers of cavities. The inner cavity is a water circulation pipeline, and the outer cavity is a combustion heating layer; the activation of its heating function is controlled by the ECU 8;

[0024] Further, when the vehicle key is powered on, the ECU 8 controls the activation and deactivation of the heating device 3 according to the threshold value of the coolant temperature. When the ECU 8 detects that the coolant temperature is lower than the conventional cold start temperature threshold T1, the heating device 3 is started. The heating device 3 heats the coolant therein by burning the fuel input from the fuel tank 10. When the coolant temperature reaches the threshold value T2, the heating is stopped and the engine is cold started;

[0025] For a vehicle adopting the present utility model, first, determine the positions of the first water inlet pipe 2 and the fuel pipeline 9 in the vehicle, and then select a suitable intermediate position to install the heating device 3, dividing the original water inlet pipeline into two sections: the first water inlet pipe 2 and the second water inlet pipe 4. Secondly, set appropriate threshold values T1 and T2 according to the cold start design capacity of the engine.

[0026] See Figures 1 to 2 , this embodiment provides a structural design for improving the starting ability of the engine in a low-temperature state. This structure actually includes parts such as the heating device 3, the fuel pipeline 9, and the water return pipe 6. The rest of the pipeline parts are original vehicle parts or basically reformed parts; by adding a heating device 3 on the basis of the original heating pipeline of the urea tank 5, this structure can improve the low-temperature cold start ability of the engine by -10 to -15 °C, and further expand the low-temperature application environment of the engine.

[0027] See Figure 1 , the coolant in the engine main water pipe 1 flows into the heating device 3 through the first water inlet pipe 2; the heating device 3 determines whether to start the heating function according to the control command of the ECU 8. If so, the heated water flows into the urea tank 5 through the second water inlet pipe 4, and then flows into the engine water inlet pipe 7 through the water return pipe 6.

[0028] The structure for improving the low-temperature cold start ability of the engine in this embodiment draws water from the engine main water pipe 1 and returns it to the engine inlet pipe 7. The coolant heating device 3 is installed in the original inlet pipe circuit, which has little impact on the vehicle layout, is simple in structure and convenient for assembly. Secondly, the water pipe of the urea tank 5 is used to heat the engine coolant, which has a significant effect on improving the cold start ability of the engine, and the low-temperature environment adaptability can be improved by -10 to -15 °C. Thirdly, the heating device 3 does not use the vehicle battery for heating, ensuring the cold start ability of the battery for the engine.

[0029] The utility model relates to the technical field of vehicles, and discloses a structure for improving the low-temperature starting ability of an engine. The structure includes an engine main water pipe 1, a first inlet pipe 2, a heating device 3, a second inlet pipe 4, a urea tank 5, a return pipe 6, an engine inlet pipe 7, an ECU 8, a fuel pipeline 9, and a fuel tank 10. Among them, the heating device 3 is a device for heating the coolant by burning diesel. The structure for improving the low-temperature starting ability of the engine provided by the utility model has a simple structure layout, is convenient to operate, has a relatively low cost, and can improve the low-temperature adaptability of the vehicle by -10 °C to -15 °C, further improving the environmental adaptability of the vehicle.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A structure for enhancing the starting ability of an engine at low temperatures, characterized in that It includes an engine main water pipe (1), a first water inlet pipe (2), a heating device (3), a second water inlet pipe (4), a urea tank (5), a return water pipe (6), and an engine water inlet pipe (7) connected in sequence. The heating device (3) is further connected to an ECU (8) and a fuel tank (10).

2. The structure for enhancing the starting ability of an engine in a low-temperature state according to claim 1, wherein The heating device (3) takes water from the engine main water pipe (1).

3. The structure for enhancing the starting ability of an engine in a low-temperature state according to claim 1, characterized in that, The return water of the heating device (3) returns to the urea tank (5) and the second water inlet pipe (4).

4. A structure for improving the starting ability of an engine in a low-temperature state according to claim 1, characterized in that The ECU (8) controls the opening and closing of the heating device (3) according to the threshold value of the coolant temperature.

5. A structure for enhancing the starting ability of an engine at low temperatures according to claim 1, characterized in that, The heating function of the heating device (3) comes from the fuel in the vehicle fuel tank.

6. The structure for improving the starting ability of the engine in a low-temperature state according to claim 1, characterized in that, The heating device (3) has two layers of cavities. The inner cavity is a water circulation pipeline, and the outer cavity is a combustion heating layer; the opening of its heating function is controlled by the ECU (8).

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