Device and method for measuring stroke of normally closed valve

Abstract

The invention provides a normally closed valve stroke measurement device and method. The device at least comprises a measuring pin, a measuring pin seat, a bolt, a coil winding supporting seat, a stroke measurement base and a coil winding, wherein the measuring pin is arranged on the measuring pin seat to form a first combined structure; the second surface of the measuring pin is connected with asealed steel ball of the normally closed valve; the coil winding surrounds the normally closed valve and is embedded in the coil winding supporting seat to form a second combined structure; the bolt is used for fastening the first combined structure and the second combined structure; the stroke measurement base is placed on a horizontal plane; and the combination of the first combined structure and the second combined structure which are fastened by using the bolt is placed on the stroke measurement base. The device and the method provided in the invention can quickly, efficiently and accurately measure the working stroke of the normally closed valve.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a device and method for measuring the stroke of a normally closed valve. Background technique [0002] The normally closed valve used in the anti-lock braking system (ABS) and electronic stability control program (ESP) of automobiles is constructed as a solenoid valve that is energized to open. The ABS braking adjustment process is divided into three stages: boosting, pressure maintaining and pressure releasing, in which the normally closed valves are closed in the boosting and pressure maintaining stages to increase and maintain the pressure of the brake wheel cylinder, while the pressure releasing stage is normally closed The valve is opened to relieve the excessive pressure of the wheel cylinder to keep the slip ratio of the wheel in the optimum range. [0003] figure 1 It is a structural schematic diagram of the closed state of the normally closed valve in the prior art...

AI Technical Summary

Problems solved by technology

If the working stroke h is too small, the flow channel formed by the sealing steel ball 7-6 and the sealing cone surface of the valve seat 7-5 is too small, the excessive pressure of the wheel cylinder cannot be released, and the wheel may be locked and skidded

If the working stroke h is too large, the coil needs to provide a strong magnetic field, otherwise the bottom surface A of the static core 7-1 and the top surface B of the moving core 7-4 cannot overlap, and the normally closed valve cannot be fully opened

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