Air check valve device for exhaust pipe of automobile

Abstract

The invention discloses an air check valve device for an exhaust pipe of an automobile, which is an auxiliary device for the exhaust pipe of the automobile, belongs to the fields of energy conservation and emission reduction of engines, and solves the problem that exhaust does not reach a standard when the automobile runs. A hollow ball and a return spring are arranged in a special metal shell; a flange plate is welded outside the special metal shell; the hollow ball is high in surface smoothness and light in weight and has certain strength, and is made of a stainless steel material; the return spring is a conical pressure spring and can increase the returning directionality of the hollow ball; one end of the return spring is welded to the hollow ball, the other end of the return spring is welded on the inner wall of the shell, and not less than three welding spots are ensured; the hollow ball, the return spring and an air inlet pipe are in the same center line to facilitate the improvement of the returning speed of the hollow ball and the sealing property; the air inlet pipe and an air outlet pipe are the same in pipe diameter and are arranged according to an arrow direction of the shell, so that when the hollow ball is pushed away by high pressure waste gas, the hollow ball cannot block the air outlet pipe, and a sufficient airflow space is reserved above the hollow ball.

Description

Technical field: [0001] The invention relates to an auxiliary device for an automobile exhaust pipe, belonging to the field of energy saving and emission reduction of automobile engines. Background technique: [0002] In electronically controlled vehicles, the function of the oxygen sensor is to detect the oxygen content in the exhaust gas in the exhaust pipe. The engine electronic control unit (ECU) adjusts the fuel injection quantity in real time according to the voltage signal fed back by the oxygen sensor to the oxygen ion in the exhaust gas, so that the concentration ratio of the mixed gas entering the cylinder reaches the theoretical value of 14.7:1 (air to fuel). The ratio relationship can realize the complete combustion of fuel and make the exhaust emission reach the standard. However, the exhaust gas of automobiles often cannot meet the standards during driving. The reason is that the parameters detected by the oxygen sensor are not completely true and accurate. ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention patent is to add an air check valve device for the exhaust pipe of the automobile before the muffler of the electronically controlled automobile exhaust pipe, hoping to solve the problem that the exhaust gas of the engine of the automobile is not up to standard when the automobile is running, and the device is applicable For the exhaust system of vehicles with various electronic control configurations

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