Engine and traveling equipment

By setting up an intake pipe, air withdrawal pipe and control valve in the diesel engine, and using the engine intake pipe to directly take air, the problem of high gas withdrawal cost in the urea box is solved, and the effect of reducing costs and improving measurement accuracy is achieved.

CN223018713UActive Publication Date: 2025-06-24WEICHAI POWER CO LTD
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Patent Information

Application Number
CN202422358853.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-26
Publication Date
2025-06-24
Estimated Expiration
2034-09-26

AI Technical Summary

Technical Problem

The cost of gas extraction of urea tanks in existing diesel engines is high, mainly because the bubbles in the urea tank affect the measurement of urea concentration, resulting in an additional gas tank being needed for inflation, which increases space occupation and cost.

Method used

By setting up an intake pipe, air withdrawal pipe and control valve in the engine, the engine intake pipe is used to directly take air to replenish the gas in the urea box, avoiding the need to set up a separate gas tank.

Benefits of technology

It effectively reduces the gas withdrawal cost of the urea box, reduces internal changes of the engine, improves the accuracy of urea concentration measurement, and avoids the problem of torque and speed limit caused by bubbles.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223018713U_ABST
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Abstract

The engine comprises an air inlet pipe, a urea box, an air taking pipe, a control valve and a urea box parameter monitoring device, the air inlet pipe is connected with an air inlet valve and the air outlet end of an intercooler, and the air taking pipe is connected with the air inlet pipe and the urea box. The control valve is installed on the gas taking pipe to control on-off of gas flow of the gas taking pipe, and the measuring end of the urea box parameter monitoring device is installed in the urea box. According to the engine provided by the invention, the gas is directly taken through the gas inlet pipe of the engine, so that the gas in the urea box is supplemented, a gas tank does not need to be independently arranged, the condition of supplementing the gas to the gas tank in the later period is not involved, the engine is slightly modified, and the gas taking cost of the urea box is effectively reduced.
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Description

Technical Field

[0001] The utility model relates to the technical field of urea measurement, and particularly relates to an engine and a driving device. Background Art

[0002] The urea concentration sensor for diesel engines can measure the urea concentration in real time. When the urea concentration is unqualified, in order to control pollutant emissions and protect the environment, the ECU will trigger the vehicle to limit torque and speed.

[0003] However, when the vehicle is running, the urea in the urea tank will generate bubbles on the surface of the urea concentration sensor probe due to reasons such as shaking, which affects the concentration measurement. In order to reduce the bubbles in the urea tank, an air tank is usually arranged inside the engine to inflate the urea tank. However, additionally arranging an air tank inside the engine to inflate the urea tank occupies a large space, and considering that the air tank needs to be inflated, the position of the air tank and the corresponding equipment also need to be improved, resulting in a high cost for taking gas from the urea tank.

[0004] Therefore, how to reduce the gas-taking cost of the urea tank is a technical problem that needs to be solved urgently by those skilled in the art. Content of the Utility Model

[0005] The purpose of the utility model is to provide an engine to reduce the gas-taking cost of the urea tank. Another purpose of the utility model is to provide a driving device including the above engine.

[0006] The engine provided by this application includes:

[0007] An intake pipe, which connects an intake valve and the outlet end of an intercooler;

[0008] A urea tank;

[0009] A gas-taking pipe, which connects the intake pipe and the urea tank;

[0010] A control valve, which is installed on the gas-taking pipe to control the on-off of the gas flow in the gas-taking pipe;

[0011] A urea tank parameter monitoring device, whose measuring end is installed inside the urea tank.

[0012] Optionally, in the above engine, the intake valve is an intake throttle valve, and the control valve is a solenoid valve.

[0013] Optionally, in the above engine, the measuring end of the urea tank parameter monitoring device is provided with a pressure monitoring device, and the pressure monitoring device is used to monitor the air pressure inside the urea tank.

[0014] Optionally, in the above-mentioned engine, a concentration monitoring device is provided at the measuring end of the urea tank parameter monitoring device, and the concentration monitoring device is used to monitor the urea concentration in the urea tank.

[0015] Optionally, in the above-mentioned engine, it further includes a gas guide pipe section arranged in the middle of the outer wall of the intake pipe. The gas guide pipe section is communicated with the intake pipe, and the air intake pipe is connected to the air outlet end of the gas guide pipe section.

[0016] Optionally, in the above-mentioned engine, the gas guide pipe section and the intake pipe are integrally formed.

[0017] Optionally, in the above-mentioned engine:

[0018] The included angle between the air flow direction in the gas guide pipe section and the air flow direction in the intake pipe is less than 30°;

[0019] And / or, the inner diameter of the air inlet of the gas guide pipe section is less than 20 mm.

[0020] Optionally, in the above-mentioned engine, it further includes a timing module and a control module. The urea tank parameter monitoring device, the control valve, and the timing module are all signal-connected to the control module, and the timing module is used to measure the opening duration of the control valve.

[0021] Optionally, in the above-mentioned engine, it further includes an alarm module, and the alarm module is signal-connected to the control module.

[0022] A traveling device includes an engine, and the engine is the engine described in any one of the above.

[0023] In the above technical solution, the engine provided by the present utility model includes an intake pipe, a urea tank, an air intake pipe, a control valve, and a urea tank parameter monitoring device. The intake pipe is connected to the air outlet ends of the intake valve and the intercooler. The air intake pipe is connected to the intake pipe and the urea tank. The control valve is installed on the air intake pipe to control the on-off of the air flow in the air intake pipe. The measuring end of the urea tank parameter monitoring device is installed inside the urea tank. When the engine is working, the intake pipe is connected to the intercooler and the intake valve. Under normal circumstances, the control valve is in a closed state. According to the parameters inside the urea tank obtained by the urea tank parameter monitoring device, when it is necessary to inflate the urea tank, the control valve is opened, and the gas in the intake pipe enters the urea tank through the air intake pipe.

[0024] Through the above description, it can be seen that in the engine provided by the present application, air is directly taken from the intake pipe of the engine, and then the gas in the urea tank is supplemented. There is no need to separately set up an air tank, and there is no situation of replenishing air to the air tank later. The modification to the engine is small, and the air intake cost of the urea tank is effectively reduced. Description of the Drawings

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of an engine provided by an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of another engine provided by an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the arrangement position of the air guide tube section provided in an embodiment of the utility model.

[0029] in Figures 1 - 3 Middle: 1-intercooler, 2-intake pipe, 3-air guide pipe section, 4-intake valve, 5-air intake pipe, 6-control valve, 7-air pressure monitoring device, 8-urea tank, 9-concentration monitoring device. DETAILED DESCRIPTION

[0030] The core of the utility model is to provide an engine to reduce the gas extraction cost of the urea tank. Another object of the utility model is to provide a driving device including the above engine.

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0032] Please refer to Figures 1 to 3 .

[0033] In a specific embodiment, the engine provided by the specific embodiment of the utility model includes an intake pipe 2, a urea tank 8, an air intake pipe 5, a control valve 6 and a urea tank parameter monitoring device. Specifically, the intake valve 4 is an intake throttle valve. The intake pipe 2 connects the intake valve 4 and the outlet end of the intercooler 1, and the air intake pipe 5 connects the intake pipe 2 and the urea tank 8.

[0034] For ease of arrangement, the air intake pipe 5 is preferably a hose. During layout, the air intake pipe 5 is appropriately bent according to the internal structure of the engine to reduce changes to the interior of the engine due to the installation of the air intake pipe 5.

[0035] The control valve 6 is installed on the air intake pipe 5 to control the air flow of the air intake pipe 5. In order to facilitate the control of the control valve 6, specifically, the control valve 6 can be a solenoid valve.

[0036] The measuring end of the urea tank parameter monitoring device is installed inside the urea tank 8. According to the parameters inside the urea tank 8 obtained by the urea tank parameter monitoring device, when it is necessary to inflate the urea tank 8, the control valve 6 is opened, and the gas in the intake pipe 2 enters the urea tank 8 through the gas extraction pipe 5. In a specific embodiment, the measuring end of the urea tank parameter monitoring device is provided with a pressure monitoring device 7, and the pressure monitoring device 7 is used to monitor the air pressure inside the urea tank 8. Specifically, when the air pressure inside the urea tank 8 is lower than one atmosphere, the control valve 6 is opened, and the urea tank 8 is inflated through the gas extraction pipe 5 until the air pressure inside the urea tank 8 is greater than one atmosphere, and then the control valve 6 is closed. For example, when the air pressure inside the urea tank 8 is greater than 1.5 times of one atmosphere, the control valve 6 is closed.

[0037] In a specific embodiment, the measuring end of the urea tank parameter monitoring device is provided with a concentration monitoring device 9, and the concentration monitoring device 9 is used to monitor the urea concentration inside the urea tank 8. Specifically, after the engine is started, the urea concentration in the urea tank 8 is monitored in real time. When it is detected that the urea ρ concentration in the urea tank 8 is less than the limit concentration ρ0, the solenoid valve is opened, and air is taken from the post-intercooler to inflate the urea tank 8 for 1 minute. Then, the urea concentration value in the urea tank 8 is detected again. If the urea concentration returns to normal, only the solenoid valve is closed. ρ0 can specifically be 0.6 times to 0.8 times of the normal urea concentration in the urea tank 8.

[0038] Since the inflation volume of the urea tank 8 accounts for a very small proportion of the total engine intake air, the influence on the engine intake and combustion can be ignored. Taking a certain light-duty engine as an example, the volume of the urea tank 8 is less than 0.5 cubic meters. If inflated according to this volume, at most it accounts for 0.86% of the engine idle intake air and 0.129% of the engine rated-point intake air. In practice, the urea tank 8 is not empty and does not need to be inflated all the time. Therefore, the actual inflation volume of the urea tank 8 is much lower than 0.5%. Among them, the temperature of the gas filled into the urea tank 8 is generally lower than 50 °C, which will not cause the urea to deteriorate. Therefore, it is feasible to inflate the urea tank 8 by taking air from the engine interior.

[0039] When the engine is working, the intake pipe 2 is connected to the intercooler 1 and the intake valve 4. Under normal circumstances, the control valve 6 is in a closed state. The present invention improves the pressure of the urea tank 8 to increase the saturated vapor pressure of the air inside the urea tank 8, so that the air dissolved in the urea is always diluted in the urea, and will not precipitate onto the surface of the urea concentration measurement probe when the urea solution shakes with the vehicle or the pressure of the urea tank 8 fluctuates. Thus, the influence of bubbles on the urea concentration measurement is avoided, and furthermore, vehicle torque and speed limit are avoided, and the vehicle attendance rate is improved.

[0040] As can be seen from the above description, in the engine provided in the specific embodiment of the present application, air is directly taken from the intake pipe 2 of the engine, and then the gas in the urea tank 8 is supplemented. There is no need to separately set up an air tank, nor is there a situation of replenishing air to the air tank in the later stage, effectively reducing the air intake cost of the urea tank 8 and having strong applicability.

[0041] As Figure 3 shown, in a specific embodiment, the engine further includes a gas guide pipe section 3 provided in the middle of the intake pipe 2. The gas guide pipe section 3 is connected to the outer wall of the intake pipe 2, the gas guide pipe section 3 is communicated with the intake pipe 2, and the air intake pipe 5 is connected to the air outlet end of the gas guide pipe section 3. Specifically, during assembly, the air intake pipe 5 can be sleeved on the outer periphery of the gas guide pipe section 3 and fixed by a clamp. Or the air intake pipe 5 and the gas guide pipe section 3 are connected and sealed by threaded connection.

[0042] To improve the assembly efficiency and connection stability, optionally, the gas guide pipe section 3 and the intake pipe 2 are integrally formed. For example, the two can be integrally cast. Specifically, the gas guide pipe section 3 can be a cylindrical pipe structure.

[0043] The included angle between the air flow direction in the gas guide pipe section 3 and the air flow direction in the intake pipe 2 is less than 30°. Specifically, the included angle can be the included angle formed by the center line of the gas guide pipe section 3 and the center line of the intake pipe 2. Specifically, the included angle between the air flow direction in the gas guide pipe section 3 and the air flow direction in the intake pipe 2 can be 25° - 29°. Specifically, the included angle between the air flow direction in the gas guide pipe section 3 and the air flow direction in the intake pipe 2 is 26°, 27° or 28°, etc.

[0044] The inner diameter of the air inlet of the gas guide pipe section 3 is less than 20 mm, reducing the influence of the air intake of the gas guide pipe section 3 on the operation of the engine main body.

[0045] Of course, when the intake pipe 2 does not have the gas guide pipe section 3, the aperture on the intake pipe 2 connected to the air intake pipe 5 is preferably less than 20 mm. Specifically, the aperture can be 15 mm - 18 mm.

[0046] In a specific embodiment, the engine further includes a timing module, a control module, a urea tank parameter monitoring device, and a control valve 6. The timing module and the urea tank parameter monitoring device are both signal-connected to the control module. The timing module is used to measure the opening duration of the control valve 6. During specific operation, when the control valve 6 is opened, the control module times through the timing module. After reaching the preset time, the control valve 6 is closed under the control of the control module, realizing one-time air intake into the urea tank 8.

[0047] To make the air intake by opening the control valve 6 once meet the air pressure requirements of the urea tank 8 as much as possible, the time for the control valve 6 to open for air intake into the urea tank 8 can be calculated according to the minimum air flow rate condition (idle speed) of the intake pipe 2 as needed, and the required time is the preset time of the timing module.

[0048] In a specific embodiment, the engine further includes an alarm module, and the alarm module is in signal connection with the control module.

[0049] For ease of understanding, the following is an illustration in conjunction with a specific working mode. After the engine starts, the urea tank parameter monitoring device monitors the urea concentration in the urea tank 8 in real time and feeds back the monitored concentration value to the control module. When it is detected that the urea concentration is less than the limit value, the control module controls the solenoid valve to open, takes air from after the intercooler to inflate the urea tank 8 for 1 minute, and then detects the urea concentration value in the urea tank 8 again. If the urea concentration returns to normal, the control module only closes the solenoid valve and does not trigger the alarm module, and at this time the alarm module does not alarm; on the contrary, that is, when the urea concentration is lower than normal, the control module controls the alarm module to trigger an alarm.

[0050] A traveling device provided by the present application includes an engine, and the engine is any one of the above engines. The foregoing describes the specific structure of the engine. The present application includes the above engine and also has the above technical effects.

[0051] Specifically, the traveling device can be a land traveling device or a water traveling device, etc.

[0052] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. 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 spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine, characterized in that: include: An air intake pipe (2), wherein the air intake pipe (2) is connected to an air intake valve (4) and an air outlet end of an intercooler (1); Urea tank (8); An air intake pipe (5), the air intake pipe (5) being connected to the air intake pipe (2) and the urea tank (8); A control valve (6), the control valve (6) being installed on the air intake pipe (5) to control the air flow of the air intake pipe (5); A urea tank parameter monitoring device, wherein a measuring end of the urea tank parameter monitoring device is installed in the urea tank (8).

2. The engine according to claim 1, characterized in that The air intake valve (4) is an air intake throttle valve, and the control valve (6) is a solenoid valve.

3. The engine according to claim 1, characterized in that The measuring end of the urea tank parameter monitoring device is provided with an air pressure monitoring device (7), and the air pressure monitoring device (7) is used to monitor the air pressure in the urea tank (8).

4. The engine according to claim 1, characterized in that A concentration monitoring device (9) is provided at the measuring end of the urea tank parameter monitoring device, and the concentration monitoring device (9) is used to monitor the urea concentration in the urea tank (8).

5. The engine according to claim 1, characterized in that It also comprises an air guide pipe section (3) arranged in the middle of the outer wall of the air inlet pipe (2), the air guide pipe section (3) is in communication with the air inlet pipe (2), and the air intake pipe (5) is connected to the air outlet end of the air guide pipe section (3).

6. The engine according to claim 5, characterized in that The air guide pipe section (3) and the air intake pipe (2) are integrally formed.

7. The engine according to claim 5, characterized in that: The angle between the airflow direction in the air guide pipe section (3) and the airflow direction in the air intake pipe (2) is less than 30°; And / or, the inner diameter of the air inlet of the air guide pipe section (3) is less than 20 mm.

8. The engine according to any one of claims 1 to 7, characterized in that: It also comprises a timing module and a control module. The urea tank parameter monitoring device, the control valve (6) and the timing module are all connected to the control module by signal. The timing module is used to measure the opening time of the control valve (6).

9. The engine according to claim 8, characterized in that It also includes an alarm module, which is connected to the control module by signal.

10. A traveling device, comprising an engine, characterized in that: The engine is the engine according to any one of claims 1 to 9.