EGR (Exhaust Gas Recirculation) air inlet system and drainage method

Abstract

The invention discloses an EGR (Exhaust Gas Recirculation) water removal air inlet system which comprises a water removal mechanism arranged between an EGR valve and an air inlet manifold, the water removal mechanism comprises a water removal assembly, a water storage assembly used in cooperation with the water removal assembly, an air inlet pipeline connected with the water removal assembly and the EGR valve and an air outlet pipeline connected with the EGR valve and the air inlet manifold. The water removal assembly is used for removing water vapor in EGR exhaust gas; according to the EGR water removal air inlet system in the technical scheme, the water removal assembly is arranged between the EGR valve and the air inlet manifold, after water vapor in EGR waste gas is adsorbed, remaining gas enters the air inlet manifold to be mixed with fresh air, fuel oil mixed gas and bypass waste gas and then enters the air cylinder body to be burnt, condensate water is not generated any more after the EGR waste gas with the water vapor adsorbed, and the EGR waste gas is recycled. And the problem of combustion lag or fire of an engine caused by the fact that condensed water in the manifold enters the air cylinder body can be effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of engine intake manifolds, and in particular to an EGR intake system and a drainage method. Background Art

[0002] The function of the engine EGR system is to separate a small part of the exhaust gas after the engine is burned, and use the EGR valve to control the exhaust gas flow, and then enter the intake manifold through the EGR distributor (or mixing tube). The intake manifold then distributes the exhaust gas and fresh air and other mixed gases to each cylinder for combustion to increase the hot melt of the working medium and reduce the oxygen concentration and the maximum temperature. This is one of the effective measures to reduce nitrogen oxide emissions. However, the temperature of the exhaust gas after combustion is high. After the cooled exhaust gas enters the intake manifold and mixes with the fresh air, condensed water will generally be generated in the intake manifold. If the condensed water enters the cylinder body, it will cause engine combustion lag or misfire problems.

[0003] Therefore, it is necessary to improve the structure of the existing EGR intake system so that it can effectively solve the problems existing in the prior art. Summary of the invention

[0004] In order to solve the above problems, the EGR dehydration intake system of the present technical solution sets a dehydration component between the EGR valve and the intake manifold. After the water vapor in the EGR exhaust gas is adsorbed, the remaining gas enters the intake manifold and mixes with fresh air, fuel mixed gas and detent exhaust gas before entering the cylinder body for combustion. The EGR exhaust gas that has absorbed the water vapor will no longer produce condensed water, which can effectively prevent the condensed water in the manifold from entering the cylinder body and causing engine combustion lag or misfire.

[0005] An EGR dehydration intake system includes a dehydration mechanism arranged between an EGR valve and an intake manifold; the dehydration mechanism includes a dehydration component, a water storage component used in conjunction with the dehydration component, an intake pipeline connecting the dehydration component and the EGR valve, and an outlet pipeline connecting the EGR valve and the intake manifold; the dehydration component is used to remove water vapor in the EGR exhaust gas.

[0006] Furthermore, the water removal component includes a water vapor adsorber connected between the air inlet pipeline and the air outlet pipeline and a drainage pipeline connected to the lower end of the water vapor adsorber, and the drainage pipeline is connected and installed in conjunction with the water storage component.

[0007] Furthermore, the water storage component includes a water storage tank connected to the bottom of the drainage pipeline and a one-way drainage valve arranged at the bottom of the water storage tank, and the water storage tank is used to collect condensed water generated in the water vapor adsorber.

[0008] Furthermore, a water level detector is installed on the side wall of the water storage bin, and the water level detector is provided in conjunction with a control device.

[0009] A method for draining water from an EGR water removal intake system comprises the following steps:

[0010] S1: The vehicle starts, and the EGR exhaust gas enters the water vapor adsorber. The exhaust gas is cooled and adsorbed, and the condensed water enters the water storage tank through the drainage pipe for collection;

[0011] S2: The water level detector detects the amount of condensed water entering the water storage tank. When the water level in the water storage component reaches the set value, the water level detector feeds back the detection result to the control device;

[0012] S3: The vehicle stops, and the control device controls the one-way drain valve to open to discharge the condensed water in the water storage tank.

[0013] The beneficial effect of the present invention is that the EGR water removal intake system of the present technical solution arranges a water removal component between the EGR valve and the intake manifold, so that the water vapor in the EGR exhaust gas is adsorbed, and the remaining gas then enters the intake manifold and is mixed with fresh air, fuel mixed gas and tortuous exhaust gas, and then enters the cylinder body for combustion. The EGR exhaust gas that has absorbed the water vapor will no longer produce condensed water, which can effectively prevent the condensed water in the manifold from entering the cylinder body and causing engine combustion lag or misfire. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is an overall schematic diagram of the present invention. DETAILED DESCRIPTION

[0016] Figure 1 It is a schematic diagram of the front structure of the present invention; as shown in the figure, an EGR dehydration intake system provided by the present invention includes a dehydration mechanism arranged between the EGR valve 1 and the intake manifold 2; the dehydration mechanism includes a dehydration component, a water storage component used in conjunction with the dehydration component, an intake pipe 3 connecting the dehydration component and the EGR valve, and an outlet pipe 5 connecting the EGR valve and the intake manifold; the dehydration component is used to remove water vapor in the EGR exhaust gas; the EGR dehydration intake system of the present technical solution, by arranging a dehydration component between the EGR valve 1 and the intake manifold 2, adsorbs water vapor in the EGR exhaust gas, and the remaining gas enters the intake manifold and is mixed with fresh air, fuel mixed gas and tortuous exhaust gas before entering the cylinder body for combustion. The EGR exhaust gas that has absorbed water vapor no longer produces condensed water, which can effectively avoid the problem of condensed water in the manifold entering the cylinder body to cause engine combustion lag or misfire.

[0017] In this embodiment, the water removal component includes a water vapor adsorber 4 connected between the air intake pipe 3 and the air outlet pipe 5 and a drainage pipe 6 connected to the lower end of the water vapor adsorber 4, and the drainage pipe 6 is connected and installed in conjunction with the water storage component. The water vapor adsorber 4 (which can remove water vapor, and the existing technology can be used here) is installed between the air intake pipe 3 and the air outlet pipe 5, which can effectively remove water vapor in the EGR exhaust gas, effectively reduce the water content of the EGR exhaust gas, and improve the quality of the subsequent mixed gas.

[0018] In this embodiment, the water storage component includes a water storage tank 7 connected to the bottom of the drainage pipeline 6 and a one-way drainage valve 9 arranged at the bottom of the water storage tank 7. The water storage tank 7 is used to collect the condensed water generated in the water vapor adsorber. After the water vapor adsorber 4 removes water from the EGR exhaust gas, the condensed water generated inside it enters the water storage tank 7 through the drainage pipeline 6 for effective storage, and the stored condensed water is discharged at an appropriate time through the one-way drainage valve 9 arranged below.

[0019] In this embodiment, a water level detector 8 is installed on the side wall of the water storage tank 7, and the water level detector is provided with a control device 10. A water level detector 8 is installed on the side wall of the water storage tank 7 to cooperate with water level detection, and the detection result of the water level detector 8 is fed back to the control device 10 (the control device can adopt the existing control technology, which will not be repeated here), so as to open or close the one-way drain valve 9 for drainage processing.

[0020] A method for draining water from an EGR water removal intake system comprises the following steps:

[0021] S1: When the vehicle is started, the EGR exhaust gas enters the water vapor adsorber, the exhaust gas is cooled and adsorbed, and the condensed water enters the water storage tank through the drainage pipe for collection; when the vehicle is started and operated normally, the EGR exhaust gas enters the water vapor adsorber for treatment, and the generated condensed water enters the water storage tank through the pipe;

[0022] S2: The water level detector detects the amount of condensed water entering the water storage tank. When the water level in the water storage component reaches the set value, the water level detector feeds back the detection result to the control device;

[0023] S3: The vehicle stops, and the control device controls the one-way drain valve to open to discharge the condensed water in the water storage tank.

[0024] The water level detector is located in the water storage assembly, and the water level detector is externally connected to the control device 10. When the water level detector detects that the water level reaches the set value, the control device can control the one-way drain valve 9 to drain water when the engine is not working, thereby avoiding EGR exhaust gas leakage during drainage.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An EGR dehydration intake system, characterized in that: It includes a dewatering mechanism arranged between the EGR valve and the intake manifold; the dewatering mechanism includes a dewatering component, a water storage component used in conjunction with the dewatering component, an intake pipeline connecting the dewatering component and the EGR valve, and an outlet pipeline connecting the EGR valve and the intake manifold; the dewatering component is used to remove water vapor in the EGR exhaust gas.

2. The EGR dehydration intake system according to claim 1, characterized in that: The dewatering component comprises a water vapor adsorber connected between an air inlet pipeline and an air outlet pipeline and a drainage pipeline connected to the lower end of the water vapor adsorber, and the drainage pipeline is connected and installed in conjunction with the water storage component.

3. The EGR dehydration intake system according to claim 2, characterized in that: The water storage component includes a water storage bin connected to and arranged below the drainage pipeline and a one-way drainage valve arranged at the bottom of the water storage bin. The water storage bin is used to collect condensed water generated in the water vapor adsorber.

4. The EGR dehydration intake system according to claim 3, characterized in that: A water level detector is installed on the side wall of the water storage bin, and the water level detector is provided in conjunction with a control device.

5. A drainage method for an EGR dehydration intake system, characterized in that: The following steps are involved: S1: The vehicle starts, and the EGR exhaust gas enters the water vapor adsorber. The exhaust gas is cooled and adsorbed, and the condensed water enters the water storage tank through the drainage pipe for collection; S2: The water level detector detects the amount of condensed water entering the water storage tank. When the water level in the water storage component reaches the set value, the water level detector feeds back the detection result to the control device; S3: The vehicle stops, and the control device controls the one-way drain valve to open to discharge the condensed water in the water storage tank.

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