Diesel engine air inlet temperature adjusting device

Abstract

The utility model discloses a diesel engine inlet air temperature adjusting device which comprises an air inlet pipe, an exhaust heat insulation box, an exhaust pipe, a bypass air inlet pipe and an air conveying pipe. Three mounting holes are formed in the exhaust heat insulation box, one mounting hole is connected with an exhaust pipe, the other mounting hole is connected with an air inlet pipe, the third mounting hole is connected with an air conveying pipe, the air conveying pipe is connected with a diesel engine air inlet header pipe, and a heating wire is arranged at the position, close to the exhaust heat insulation box, in the air conveying pipe. The heating wire is electrically connected with an external control switch, one side of the gas conveying pipe communicates with a bypass gas inlet pipe, and the position of the bypass gas inlet pipe is far away from the exhaust heat insulation box. The diesel engine gas inlet temperature adjusting device can ensure that the gas inlet temperature of a diesel engine is within a reasonable range in a cold environment, so that the diesel engine can be quickly started, and the service life of the diesel engine is prolonged. The working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine testing technology, specifically a diesel engine intake air temperature regulating device. Background Technology

[0002] During diesel engine testing, excessively low intake air temperature can lead to difficulty in starting the diesel engine and poor combustion. Therefore, during diesel engine testing, it is often required that the intake air temperature reach a certain range.

[0003] However, in actual use, the intake air temperature is generally low, especially in winter, when the intake air temperature does not meet the requirements. This causes the diesel engine to need to be started for a long time, affecting work efficiency. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a diesel engine intake air temperature regulating device to ensure that the intake air temperature of the diesel engine is within the design range, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a diesel engine intake air temperature regulating device, comprising an intake pipe, an exhaust heat insulation box, an exhaust pipe, a bypass intake pipe, and an air delivery pipe;

[0006] The exhaust heat insulation box is provided with three mounting holes. One mounting hole is connected to the exhaust pipe, another mounting hole is connected to the intake pipe, and the third mounting hole is connected to the air supply pipe. The air supply pipe is connected to the diesel engine intake manifold. A heating wire is installed in the air supply pipe near the exhaust heat insulation box. The heating wire is electrically connected to an external control switch. A bypass intake pipe is connected to one side of the air supply pipe. The bypass intake pipe is located away from the exhaust heat insulation box.

[0007] As a preferred embodiment of this utility model, the intake pipe is provided with an intake butterfly valve for controlling the intake air volume.

[0008] As a preferred embodiment of this utility model, a first temperature sensor is provided on the intake pipe near the exhaust heat insulation box.

[0009] As a preferred embodiment of this utility model, the bypass intake pipe is provided with a bypass butterfly valve for controlling the amount of supplementary intake air.

[0010] As a preferred embodiment of this utility model, a third temperature sensor is provided on the bypass intake pipe near the gas delivery pipe.

[0011] As a preferred embodiment of this utility model, a second temperature sensor is provided on the gas transmission pipe near the connection position with the diesel engine intake manifold, and a mating flange is provided at the end of the gas transmission pipe to be connected to the diesel engine intake manifold flange.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This diesel engine intake air temperature regulating device mixes the hot air discharged from the diesel engine exhaust pipe with the cold air entering the diesel engine, thus meeting the intake temperature of the diesel engine in cold weather, realizing energy recycling and saving costs. At the same time, a heating wire is installed in the air supply pipe to further assist in heating the air, ensuring that the intake air temperature is within the design range, and ensuring that the diesel engine starts smoothly and quickly. By setting a bypass intake pipe, if the temperature after mixing is too high, the temperature after secondary heating can be mixed and cooled to achieve a suitable intake air temperature. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram: 1 Intake pipe, 2 Intake butterfly valve, 3 First temperature sensor, 4 Exhaust heat insulation box, 5 Exhaust pipe, 6 Heating wire, 7 Gas supply pipe, 8 Second temperature sensor, 9 Matching flange, 10 Third temperature sensor, 11 Bypass butterfly valve, 12 Bypass intake pipe. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0016] Please see Figure 1 This utility model provides a technical solution: a diesel engine intake air temperature regulating device, including an intake pipe 1, an exhaust heat insulation box 4, an exhaust pipe 5, and an air supply pipe 7. The exhaust heat insulation box 4 is provided with three mounting holes, one of which is connected to the exhaust pipe 5, another is connected to the intake pipe 1, and the third is connected to the air supply pipe 7. The air supply pipe 7 is connected to the diesel engine intake manifold. A heating wire 6 is provided in the air supply pipe 7 near the exhaust heat insulation box 4. The heating wire 6 is electrically connected to an external control switch.

[0017] Air enters the exhaust heat insulation box 4 through the intake pipe 1 and the intake butterfly valve 2. The intake butterfly valve 2 is an orifice plate flow regulating valve, which regulates the intake flow by adjusting the opening of the orifice plate. A first temperature sensor 3 is installed on the intake pipe 1 before entering the exhaust heat insulation box 4 to monitor the intake temperature of the intake pipe 1.

[0018] The exhaust heat insulation box 4 is a rectangular structure with three mounting holes. One mounting hole is connected to the exhaust pipe 5, another mounting hole is connected to the intake pipe 1, and the third mounting hole is connected to the air supply pipe 7. The air supply pipe 7 is connected to the diesel engine intake manifold. The hot air discharged from the exhaust pipe 5 mixes with the cold air entering the exhaust heat insulation box 4, which raises the intake air temperature. The raised air enters the air supply pipe 7. If the air temperature after being heated by the exhaust pipe 5 does not reach the required temperature, the heating wire 6 is turned on to reheat the air and ensure that the intake air temperature reaches the expected temperature.

[0019] A bypass intake pipe 12 is connected to one side of the air supply pipe 7. The connection position of the bypass intake pipe 12 is far away from the exhaust heat insulation box 4. The air in the bypass intake pipe 12 enters the air supply pipe 7 directly without being heated. A bypass butterfly valve 11 is installed on the bypass intake pipe 12. The bypass butterfly valve 11 is also an orifice plate flow regulating valve. The intake flow is adjusted by the opening of the orifice plate. A third temperature sensor 10 is installed at the end of the bypass intake pipe 12 to monitor the intake temperature of the bypass intake pipe 12. A second temperature sensor 8 is installed on the air supply pipe 7 near the connection position with the diesel engine intake manifold to monitor the intake temperature of the diesel engine after heating, so as to ensure that the intake temperature reaches the preset value.

[0020] When in use: When the intake air temperature is lower than the design value, it is necessary to increase the hot intake air and reduce the cold intake air. At this time, the opening of the intake butterfly valve 2 is adjusted to control the amount of cold intake air. The air enters the exhaust heat insulation box 4 through the intake pipe 1 and mixes with the hot air discharged from the exhaust pipe 5. After being heated, it enters the air supply pipe 7 and is heated again by the heating wire 6. At this time, according to the temperature of the second temperature sensor 8, the opening of the bypass butterfly valve 11 on the bypass intake pipe 12 is adjusted. The cold air that enters mixes again with the hot air after being heated again, so that the intake air temperature reaches the preset value.

[0021] When the intake air temperature is higher than the preset value, it is necessary to reduce the hot intake air and increase the cold intake air. At this time, based on the intake air temperature of the first temperature sensor 3 and the third temperature sensor 10, it is determined whether the heating wire 6 needs to be turned on for heating. At the same time, the opening of the intake butterfly valve 2 and the bypass butterfly valve 11 is adjusted to increase the cold air intake volume.

[0022] A second temperature sensor 8 is installed on the gas supply pipe 7 near the connection point with the diesel engine intake manifold, and a mating flange 9 is installed at the end of the gas supply pipe 7 to connect with the diesel engine intake manifold flange.

[0023] The parts of the utility model not described in detail are prior art. Although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A diesel engine intake air temperature regulating device, characterized in that: It includes an intake pipe (1), an exhaust heat insulation box (4), an exhaust pipe (5), a bypass intake pipe (12), and an air supply pipe (7); The exhaust heat insulation box (4) is provided with three mounting holes. One mounting hole is connected to the exhaust pipe (5), another mounting hole is connected to the intake pipe (1), and the third mounting hole is connected to the air supply pipe (7). The air supply pipe (7) is connected to the diesel engine intake manifold. A heating wire (6) is provided in the air supply pipe (7) near the exhaust heat insulation box (4). The heating wire (6) is electrically connected to an external control switch. A bypass intake pipe (12) is connected to one side of the air supply pipe (7). The connection position of the bypass intake pipe (12) is far away from the exhaust heat insulation box (4).

2. A diesel air intake temperature regulating device as defined in claim 1, wherein: An intake butterfly valve (2) for controlling the intake air volume is provided on the intake pipe (1).

3. A diesel air temperature regulating device as defined in claim 1, wherein: A first temperature sensor (3) is installed on the intake pipe (1) near the exhaust heat insulation box (4).

4. A diesel air temperature regulating device as defined in claim 1, wherein: The bypass intake pipe (12) is equipped with a bypass butterfly valve (11) for controlling the amount of supplementary intake air.

5. A diesel air temperature regulating device as defined in claim 1, wherein: A third temperature sensor (10) is installed on the bypass intake pipe (12) near the gas delivery pipe (7).

6. A diesel air temperature regulating device as defined in claim 1, wherein: A second temperature sensor (8) is provided on the gas pipe (7) near the connection position with the diesel engine intake manifold, and a mating flange (9) is provided at the end of the gas pipe (7) to be connected to the diesel engine intake manifold flange.

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