| 摘要 |
A poppet type solenoid valve used in an electronically controlable vehicle hydraulic brake system is proposed which suppresses sound and vibration and simultaneously eliminates malfunction. For these effects,the following conditions have to be satisfied:<paragraph lvl="0"><in-line-formula>FSP/(r2-B2)<67 (1)</in-line-formula><paragraph lvl="0"><in-line-formula>FSP.St2/(r2-B2)>29 (2)</in-line-formula>wherein FSP is the force of the spring, r is the tip diameter of the poppet, St is the stroke of the poppet, and B is the diameter of the area of the poppet where the valve-opening force by hydraulic pressure does not work on the poppet under the bernoulli effect.
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