Method for forced drainage of natural gas commercial vehicle engine intercooler

Abstract

The invention relates to a forced drainage method for an engine intercooler of a natural gas commercial vehicle, and solves the problem that residual water in the intercooler cannot be completely drained after the engine flames out. When the vehicle stops and the engine flames out, the whole vehicle controller outputs a signal, the electromagnetic valve is opened through the power management control relay, and after the electromagnetic valve is opened, compressed air of the whole vehicle passes through the air taking valve and is connected into an air inlet of the siphon nozzle through the first pipeline, the electromagnetic valve and the second pipeline in sequence; the lowest point of the bottom of the intercooler is connected with an input port of the siphon nozzle through a third pipeline, and after the compressed air electromagnetic valve is opened, condensate water in the intercooler is forcibly discharged through pressure relief and discharge of compressed air of the whole vehicle according to the siphon principle. According to the invention, after a vehicle stops, compressed air of a braking system of the whole vehicle is decompressed and discharged, a siphon principle is designed and formed, and condensed water in the intercooler is forcibly discharged; after the engine flames out and the system stops working, no condensate water is generated, and it is guaranteed that the condensate water generated in the intercooler is completely discharged.

Description

Technical Field

[0001] The invention relates to an engine drainage method, in particular to a method for forced drainage of an intercooler of a natural gas commercial vehicle engine. Background Art

[0002] The technical characteristics of natural gas engines are that the engine intake system has a lot of water vapor during vehicle operation, and a large amount of condensed water will be generated during the cooling process of the intercooler intake system. If the condensed water is not removed in time in winter, it will freeze when the engine stops, causing the intercooler to bulge and crack. In addition, the moisture in the engine intake air has an impact on the normal operation and performance output of the engine and potential risks. At present, the industry uses a drain valve at the bottom of the intercooler to drain water.

[0003] A drain valve is added to the bottom of the intercooler to drain water. When the engine is turned off, the pressure in the intercooler system is balanced with the external pressure or negative pressure. If the remaining water is not drained out, a certain amount of ice will accumulate and the intercooler will still bulge. When the vehicle is stationary, dust in the environment enters the intercooler through the drain valve. After the vehicle is started, the dust in the intercooler enters the combustion chamber under pressure, which may damage the engine block. Summary of the invention

[0004] In order to solve the problem that the residual water in the intercooler cannot be drained after the engine is turned off, the compressed air in the brake system is effectively used to relieve pressure and release. By designing the application of siphon nozzles, negative pressure is formed to force the condensed water remaining in the intercooler to be drained and discharged, completely solving the problem of frozen bulging of the intercooler, ensuring good operating conditions of the engine, improving performance and extending service life.

[0005] The present invention is achieved by the following technical solutions:

[0006] A method for forcibly draining water from an engine intercooler of a natural gas commercial vehicle. When the vehicle stops and the engine 1 is turned off, a vehicle controller 2 outputs a signal to open a solenoid valve 4 through a power management control relay 3. After the solenoid valve 4 is opened, compressed air from the vehicle passes through an air intake valve 5, and is successively connected to an air inlet of a siphon nozzle 8 through a pipeline 1 6, a solenoid valve 4, and a pipeline 2 7. The lowest point at the bottom of an intercooler 9 is connected to an input port of the siphon nozzle 8 through a pipeline 3 10. When the compressed air solenoid valve 4 is opened, the condensed water in the intercooler is forcibly discharged through the siphon principle by utilizing the pressure relief discharge of the compressed air from the vehicle.

[0007] A forced drainage structure for an intercooler of a natural gas commercial vehicle engine comprises an engine 1, a vehicle controller 2, a relay 3, a solenoid valve 4, an air intake valve 5, a siphon nozzle 8 and an intercooler 9, wherein the vehicle controller 2 is connected to the engine 1, the relay 3 is respectively connected to the vehicle controller 2 and the solenoid valve 4, the solenoid valve 4 is connected to the air intake valve 5 through a pipeline 1 6, and is connected to an air inlet of the siphon nozzle 8 through a pipeline 2 7, and the lowest point at the bottom of the intercooler 9 is connected to an input port of the siphon nozzle 8 through a pipeline 3 10.

[0008] Beneficial effects of the present invention:

[0009] (1) After the vehicle stops, the compressed air in the vehicle's brake system is effectively released, and the siphon principle is designed to force the condensed water in the intercooler to be discharged;

[0010] (2) After the engine is turned off and the system stops working, no condensed water is generated and the condensed water generated in the intercooler is drained away. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the control principle diagram of the present invention. DETAILED DESCRIPTION

[0012] like Figure 1 As shown, the present invention is an application method for forced drainage of a natural gas engine intercooler. When a commercial vehicle stops running, the compressed air in the brake system is effectively used to relieve pressure and release, and the condensed water remaining in the intercooler is forced to be discharged through the siphon nozzle and the siphon principle, while effectively preventing dust and foreign matter in the environment from entering the intercooler to cause adverse consequences and impacts.

[0013] When the vehicle stops and the engine 1 is turned off, the vehicle controller 2 outputs a signal to open the solenoid valve 4 through the power management control relay 3. After the solenoid valve 4 is opened, the compressed air of the vehicle passes through the air intake valve 5, and is successively connected to the air inlet of the siphon nozzle 8 through the pipeline 1 6, the solenoid valve 4, and the pipeline 2 7. The lowest point at the bottom of the intercooler 9 is connected to the input port of the siphon nozzle 8 through the pipeline 3 10. When the compressed air solenoid valve 4 is opened, the condensed water in the intercooler is forced to be discharged through the siphon principle by utilizing the compressed air pressure relief discharge of the vehicle.

Claims

1. A method for forced drainage of an engine intercooler of a natural gas commercial vehicle, characterized by: When the vehicle stops and the engine is turned off, the vehicle controller outputs a signal to open the solenoid valve through the power management control relay. After the solenoid valve is opened, the compressed air of the vehicle passes through the air intake valve, and is successively connected to the air inlet of the siphon nozzle through pipeline one, solenoid valve, and pipeline two. The lowest point at the bottom of the intercooler is connected to the siphon nozzle input port through pipeline three. When the compressed air solenoid valve is opened, the condensed water in the intercooler is forced to be discharged through the siphon principle by utilizing the compressed air pressure relief discharge of the vehicle.

2. A forced drainage structure for a natural gas commercial vehicle engine intercooler, characterized by: It includes an engine, a vehicle controller, a relay, a solenoid valve, an air intake valve, a siphon nozzle and an intercooler. The vehicle controller is connected to the engine, the relay is respectively connected to the vehicle controller and the solenoid valve, the solenoid valve is connected to the air intake valve through pipeline one, and is connected to the air inlet of the siphon nozzle through pipeline two. The lowest point at the bottom of the intercooler is connected to the siphon nozzle input port through pipeline three.

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