Gas drive system and gas drive system purging function control method
A control method and gas drive technology, applied in exhaust devices, mufflers, engine components, etc., can solve the problems of easy crystallization, blockage, and stuck exhaust valve of urea solution.
Active Publication Date: 2021-12-17
FAW JIEFANG AUTOMOTIVE CO
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Problems solved by technology
[0003] Based on this, it is necessary to address the exhaust process of the gas drive system in the related art. The high-pressure gas in the urea tank of the gas drive system will bring the urea solution into the intake and exhaust valves, and the urea solution is easy to crystallize in the exhaust valve, causing the exhaust valve Stuck and blocked problems
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[0042] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "...
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The invention relates to a gas drive system and a gas drive system purging function control method. The gas drive system comprises an air filter, an exhaust valve and a first reverse blowing valve, wherein the exhaust valve is used for being in one-way communication with a urea tank through a one-way valve; and the first reverse blowing valve is communicated with the air filter and the exhaust valve, so that the air filter can purge the exhaust valve. The problems that in the prior art, when shutdown exhaust is used for purging residual urea in a urea pipeline and a nozzle, high-pressure gas in the urea tank of the gas drive system can bring a small amount of urea solution into the exhaust valve, the urea solution is prone to crystallization in the exhaust valve to cause clamping stagnation and blockage of the exhaust valve, the exhaust valve fails, and the consequences of user claim and the like are brought are solved.
Description
technical field [0001] The present application relates to the technical field of gas drive post-treatment systems, in particular to a gas drive system and a method for controlling the purge function of the gas drive system. Background technique [0002] With the development of gas drive post-processing system technology, gas drive system purge technology has emerged. In related technologies, the air intake valve on the urea tank is used to build pressure for the vehicle urea tank during vehicle driving; after the vehicle stops, Use the exhaust valve on the urea tank to release the pressure in the urea tank, and then use the blowback valve on the urea tank to blow out the residual urea in the urea pipeline and nozzle to prevent ice swelling and blockage of the urea nozzle Fault. During use, when the exhaust is stopped to purge the residual urea solution in the nozzle, the high-pressure gas in the urea tank of the gas drive system will bring a small amount of urea solution in...
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IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/2093F01N3/2066F01N3/28
Inventor 赵志强
Owner FAW JIEFANG AUTOMOTIVE CO