Device for improving oil consumption of diesel engine through subsection control of intercooler

Abstract

The utility model discloses a device for improving oil consumption of a diesel engine through intercooling subsection control, which comprises an intercooler, an intercooler left air chamber and an intercooler right air chamber are symmetrically arranged in the intercooler, the intercooler left air chamber is communicated with the intercooler right air chamber through a plurality of cooling pipes, the intercooler left air chamber is divided into an upper left air chamber and a lower left air chamber, and the lower left air chamber is divided into a lower left air chamber and an upper right air chamber. The left upper air chamber and the left lower air chamber are communicated through an intercooling control valve, and the intercooling control valve is electrically connected with an ECU controller. The heat management valve solves the problem that in the prior art, when the temperature of tail gas of an engine is low, in order to reduce emission of NOx, tail gas is accumulated through the heat management valve, and therefore oil consumption of the engine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of intercoolers, and relates to a device for improving diesel engine fuel consumption by segmented control of an intercooler. Background Art

[0002] At the present stage, in order to meet the National Sixth Phase Motor Vehicle Pollutant Emission Standards, diesel engines need to install an SCR system on the exhaust gas emission path of the engine to treat the engine exhaust gas to reduce the emission of NO x However, the existing SCR system has certain requirements for the temperature of the engine exhaust gas, which needs to be 300 - 400 °C. When the temperature of the exhaust gas is too low, the activity of the catalyst in the SCR system will decrease, resulting in a decrease in the denitrification efficiency and it is difficult to remove NO in the exhaust gas. x To solve this problem, the existing technology is to install a thermal management valve between the engine exhaust manifold and the SCR system. When the exhaust gas temperature is low, the valve closes, accumulating the exhaust gas in a certain space to increase the temperature of the exhaust gas. When the temperature of the exhaust gas reaches the treatment temperature of the SCR system, the thermal management valve opens to discharge the high-temperature exhaust gas, which is then treated by the SCR system.

[0003] The problem of the existing device is that when the thermal management valve is closed for exhaust gas accumulation, since the exhaust gas is difficult to be discharged in time, it will lead to an increase in the engine exhaust back pressure, causing the engine to require more energy to discharge the exhaust gas. At the same time, in order to meet the power demand of the vehicle, the engine needs to consume more fuel to maintain the same power output. Moreover, due to the accumulation of exhaust gas, the lack of exhaust gas flow in the engine will cause a decrease in combustion efficiency. The combination of these three factors increases the fuel consumption of the engine. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for improving diesel engine fuel consumption by segmented control of an intercooler, which solves the problem in the existing technology that when the temperature of the engine exhaust gas is low, in order to reduce the emission of NO x exhaust gas is accumulated, resulting in an increase in the fuel consumption of the engine.

[0005] The technical solution adopted by the utility model is that the device for improving diesel engine fuel consumption by segmented control of an intercooler includes an intercooler. An intercooler left air chamber and an intercooler right air chamber are symmetrically arranged in the intercooler. The intercooler left air chamber and the intercooler right air chamber are connected by a number of cooling pipes. The intercooler left air chamber is divided into an upper left air chamber and a lower left air chamber, and the upper left air chamber and the lower left air chamber are connected by an intercooling control valve. The intercooling control valve is electrically connected to an ECU controller.

[0006] The characteristics of the utility model also lie in that:

[0007] The cooling pipes connected to the upper left air chamber account for 50% - 80% of the total number of cooling pipes, and the remaining cooling pipes are connected to the lower left air chamber.

[0008] The upper left air chamber is connected to a supercharger through a pipeline.

[0009] The right air chamber of the intercooler is connected to an intake manifold through a pipeline.

[0010] One side of the intake manifold is connected to an engine, and the other side of the engine is connected to an exhaust manifold.

[0011] A temperature sensor is fixedly connected to the exhaust manifold.

[0012] The ECU controller is electrically connected to the supercharger, the engine, and the temperature sensor respectively.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The device for improving the fuel consumption of diesel engines with segmented intercooling control in the present utility model adjusts the heat dissipation area of the intercooler by adjusting the opening and closing of the intercooling control valve, and regulates the cooling efficiency of the intercooler. When the exhaust temperature of the engine decreases, the temperature of the gas entering the engine is increased, so that the exhaust temperature of the engine rises. On the premise of ensuring that the exhaust gas temperature of the engine is suitable for SCR system treatment, the operation ratio of the thermal management valve during the operation of the engine is reduced, the starting time of the thermal management valve is reduced, the fuel consumption of the engine is reduced, and the effect is remarkable in cold environments.

[0015] 2. The device for improving the fuel consumption of diesel engines with segmented intercooling control in the present utility model controls the volume of the left air chamber of the intercooler by adjusting the opening and closing of the intercooling control valve, resulting in an increase in intake resistance, and then a decrease in the intake air volume of the engine, causing the exhaust temperature of the engine to rise, reducing the operation ratio of the thermal management valve during the operation of the engine, reducing the starting time of the thermal management valve, and reducing the fuel consumption of the engine.

[0016] 3. The device for improving the fuel consumption of diesel engines with segmented intercooling control in the present utility model enables the exhaust gas temperature of the engine to be maintained within the temperature range suitable for SCR system treatment through the setting of the intercooling control valve, effectively reducing the emission of NOx and meeting the National Sixth Stage Motor Vehicle Pollutant Emission Standards. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the device for improving the fuel consumption of diesel engines with segmented intercooling control in the present utility model.

[0018] In the figure: 1. Supercharger; 2. Intercooler; 21. Left air chamber of the intercooler; 211. Upper left air chamber; 212. Intercooling control valve; 213. Lower left air chamber; 22. Right air chamber of the intercooler; 23. Cooling pipe; 3. Intake manifold; 4. Engine; 5. Exhaust manifold; 6. Temperature sensor; 7. ECU controller. Detailed Embodiments

[0019] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Embodiment 1:

[0021] As Figure 1 shown, it includes an intercooler 2. Inside the intercooler 2, an intercooler left air chamber 21 and an intercooler right air chamber 22 are symmetrically arranged. The intercooler left air chamber 21 and the intercooler right air chamber 22 are connected by a number of cooling tubes 23. The intercooler left air chamber 21 is divided into an upper left air chamber 211 and a lower left air chamber 213, and the upper left air chamber 211 and the lower left air chamber 213 are connected by an intercooling control valve 212. The intercooling control valve 212 is electrically connected to an ECU controller 7.

[0022] The intercooling control valve 212 is used to control whether the lower left air chamber 213 participates in the cooling work, thereby controlling the number of cooling tubes 23 participating in the cooling and the volume of the intercooler left air chamber 21. When the intercooling control valve 212 is closed, the number of cooling tubes 23 participating in the cooling decreases, and the volume of the intercooler left air chamber 21 decreases, resulting in a decrease in the cooling capacity of the intercooler 2, making the temperature of the compressed gas passing through some of the cooling tubes 23 higher than the temperature when the intercooling control valve 212 is closed, and reducing the density of the compressed air discharged from the intercooler 2.

[0023] Embodiment 2:

[0024] As Figure 1 shown, the cooling tubes 23 connected to the upper left air chamber 211 account for 50% - 80% of the total number of cooling tubes 23, and the remaining cooling tubes 23 are connected to the lower left air chamber 213. The upper left air chamber 211 and the lower left air chamber 213 are each connected to a part of the cooling tubes 23. Since the upper left air chamber 211 is always in a working state as it is connected to the supercharger 1, the cooling tubes 23 connected to the upper left air chamber 211 account for the majority of the total. After the intercooling control valve 212 is closed, the compressed air can be adjusted to a suitable state to supply air to the engine 4.

[0025] The upper left air chamber 211 is connected to a supercharger 1 through a pipeline, and the supercharger 1 supplies compressed air to the intercooler 2.

[0026] The intercooler right air chamber 22 is connected to an intake manifold 3 through a pipeline, and the processed air is supplied into the engine 4.

[0027] One side of the intake manifold 3 is connected to an engine 4, and the other side of the engine 4 is connected to an exhaust manifold 5.

[0028] When the exhaust gas temperature of the engine 4 decreases, the intercooler 2 reduces the cooling effect by closing the intercooler control valve 212, and at the same time reduces the volume of the left air chamber 21 of the intercooler, resulting in a reduction in the amount of air entering the engine 4. To achieve the same power output, the engine 4 requires more fuel to attempt to maintain its output efficiency. This causes the fuel-air mixture ratio to shift towards an excessive fuel direction, generating more heat during combustion, thereby causing the exhaust gas temperature to rise.

[0029] Embodiment Three:

[0030] As Figure 1 shown, a temperature sensor 6 is fixedly connected to the exhaust manifold 5.

[0031] The ECU controller 7 is electrically connected to the supercharger 1, the engine 4, and the temperature sensor 6 respectively.

[0032] The ECU controller 7 detects in real time the temperature of the exhaust gas discharged from the exhaust manifold 5 of the engine 4 through the temperature sensor 6, so that when the exhaust gas temperature decreases, the ECU controller 7 can quickly respond by closing the intercooler control valve 212 to increase the temperature of the exhaust gas discharged by the engine 4, reduce the operation proportion of the thermal management valve, and thus reduce the fuel consumption of the engine 4.

[0033] This device can reduce the intake air volume of the engine 4 by adjusting the cooling effect of the intercooler 2, thereby increasing the temperature of the exhaust gas discharged by the engine 4, reducing the operation proportion of the thermal management valve, and can save 1.8% of fuel compared with the operation of the thermal management valve, significantly reducing fuel consumption.

[0034] The specific use process of the present utility model is as follows:

[0035] When the device is operating normally, the temperature sensor 6 located on the exhaust manifold 5 transmits the detected tail gas temperature to the ECU controller 7. The ECU controller 7 controls the supercharger 1 to compress the air, and then the compressed air is introduced into the upper left air chamber 211. At this time, the intercooler control valve 212 is in the open state. The compressed air passes through the intercooler control valve 212 and enters the lower left air chamber 213. Then, the compressed gas in the left air chamber 21 of the intercooler passes through all the cooling pipes 23 for cooling to increase the density of the air, and then enters the right air chamber 22 of the intercooler and then enters the engine 4 through the intake manifold 3 to make the fuel burn to provide power.

[0036] When the exhaust gas temperature of the engine 4 decreases, the temperature sensor 6 transmits the detected temperature change to the ECU controller 7. Then, the ECU controller 7 controls the intercooler control valve 212 to close. The compressed air generated by the supercharger 1 enters the upper left air chamber 211. Since the intercooler control valve 212 is in the closed state at this time, the compressed air only passes through the cooling pipe 23 connected to the upper left air chamber 211 for cooling, and then enters the right air chamber 22 of the intercooler and is then introduced into the engine 4 through the intake manifold 3 for combustion to provide power, thereby increasing the exhaust gas temperature of the engine 4, reducing the startup ratio of the thermal management valve, and reducing the fuel consumption of the engine 4.

Claims

1. Device for improving diesel engine fuel consumption by segmented control of intercooler, characterized in that It includes an intercooler (2). Inside the intercooler (2), an intercooler left air chamber (21) and an intercooler right air chamber (22) are symmetrically arranged. The intercooler left air chamber (21) and the intercooler right air chamber (22) are connected through a number of cooling pipes (23). The intercooler left air chamber (21) is divided into an upper left air chamber (211) and a lower left air chamber (213), and the upper left air chamber (211) and the lower left air chamber (213) are connected through an intercooler control valve (212). The intercooler control valve (212) is electrically connected to an ECU controller (7).

2. The device for improving the fuel consumption of diesel engines by segmented control of an intercooler according to claim 1, wherein The cooling pipes (23) connected to the upper left air chamber (211) account for 50% - 80% of the total number of cooling pipes (23), and the remaining cooling pipes (23) are connected to the lower left air chamber (213).

3. The device for improving the diesel engine fuel consumption by segmented control of the intercooler according to claim 1, characterized in that, The upper left air chamber (211) is connected to a supercharger (1) through a pipe.

4. The device for improving the diesel engine fuel consumption by segmented control of the intercooler according to claim 1, wherein The intercooler right air chamber (22) is connected to an intake manifold (3) through a pipe.

5. The device for improving the fuel consumption of a diesel engine by segmented control of an intercooler according to claim 4, characterized in that, One side of the intake manifold (3) is connected to an engine (4), and the other side of the engine (4) is connected to an exhaust manifold (5).

6. The device for improving the fuel consumption of diesel engines by segmental control of an intercooler according to claim 5, wherein, A temperature sensor (6) is fixedly connected to the exhaust manifold (5).

7. The device for improving the diesel engine fuel consumption by segmented control of the intercooler according to claim 3 or 6, characterized in that, The ECU controller (7) is electrically connected to the supercharger (1), the engine (4), and the temperature sensor (6) respectively.

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