Carbon tank electromagnetic valve and pipeline system for eliminating airflow pulsation and noise in vehicle

Abstract

The invention discloses a carbon tank electromagnetic valve and pipeline system for eliminating airflow pulsation and noise in a vehicle. The carbon tank electromagnetic valve and pipeline system comprises an electromagnetic valve, an upstream pipeline and a downstream pipeline, wherein the electromagnetic valve comprises a valve body and an inductance coil, a valve cavity is formed in the valve body, a valve is arranged in the valve cavity, and an air inlet pipe and an air outlet pipe are arranged at the top and the bottom of the valve body respectively. The air inlet pipe communicates with the air outlet pipe through a valve in an opening and closing mode, the air inlet pipe communicates with a carbon tank through an upstream pipeline, a reducing portion with a through hole is arranged in the air inlet pipe or an upstream pipeline, and the radial sectional area of the through hole of the reducing portion is smaller than that of the air inlet pipe. Two ends of the inductance coil areelectrically connected with a positive electrode of an automobile storage battery and a PWM power amplification driving signal output end of an engine controller respectively, and a rectifier diode isreversely connected to the two ends of the inductance coil in parallel. According to the carbon tank electromagnetic valve and pipeline system for eliminating airflow pulsation and noise in the vehicle, the airflow pulsation and the noise in the vehicle, caused by the airflow pulsation can be reduced, the flow performance can be guaranteed, and the structure is simple.

Description

technical field [0001] The invention relates to a carbon canister solenoid valve, in particular to a carbon canister solenoid valve and a pipeline system for eliminating airflow pulsation and noise inside a car. Background technique [0002] With the promotion and implementation of the National VI emission policy, the requirements for vehicle fuel evaporative emissions have been further increased. In order to reduce emissions and meet the requirements of the national environmental protection policy, the vapor recovery flow rate of the fuel evaporation recovery system of the National VI vehicles is about double that of the National V vehicles. , you will hear the sound of the system running in the car when working under idling conditions. Automobile fuel evaporation recovery valve pipe capacity system such as figure 1 As shown in , a vapor recovery flow control valve (hereinafter referred to as solenoid valve) widely used in automotive fuel vapor recovery systems is a duty c...

AI Technical Summary

Problems solved by technology

[0003]At present, the solution to the noise caused by the airflow pulsation in the pipeline is generally to install energy storage buffers, Helmholtz resonance boxes, expansion chambers, etc. on the pipeline, and the cost It is relatively high and needs to occupy a certain amount of space. It cannot be implemented under the condition that the space does not allow or can only adopt other methods, such as designing multiple similar devices with smaller sizes.

In addition, the expansion buffer elements connected in series in the pipeline also increase the local pressure loss and reduce the flow performance of the pipeline, which is not the optimal solution

Images