Patent ID: 8622088
Filing Date: 2014-01-07
Classification: B60K,F16K,Y10T

Abstract:
1. A solenoid valve comprising: a valve housing defining a fluid pathway for flowing fluid therein; a first valve member configured to open and close the fluid pathway; a first biasing member biasing the first valve member in a direction for closing the fluid pathway; a second valve member configured to open and close the fluid pathway; a second biasing member biasing the second valve member in a direction for closing the fluid pathway; a pressing rod; and an electromagnetic driving member pressing the pressing rod against the first valve member and the second valve member sequentially in order to open the fluid pathway in stages; wherein the second valve member defines a communicating pathway therein communicating an upstream side and a downstream side in the fluid pathway, and the first valve member is capable of closing and opening the communicating pathway; a first guide member, which is provided between the first valve member and the second valve member and guides the first valve member in a direction for opening and closing the fluid pathway, and a second guide member, which is provided between the second valve member and a portion of the valve housing defining the fluid pathway and guides the second valve member in a direction for opening and closing the fluid pathway; wherein the first biasing member includes a first coil spring, the second biasing member includes a second coil spring, the first coil spring is positioned at least partially within the second coil spring, and the first guide member is placed between an outer diameter of the first coil spring and an inner diameter of the second coil spring; wherein the second valve member comprises: a valve plate, and an inner cylindrical portion and an outer cylindrical portion each extending downward from an outer peripheral portion of the valve plate; wherein the inner cylindrical portion and the outer cylindrical portion are coaxial with each other and define an annular space therebetween; wherein the first guide member includes the inner cylindrical portion; wherein the second guide member includes the outer cylindrical portion; and wherein one end of the second coil spring is fitted into the annular space.