Patent ID: 6526951
Filing Date: 2003-03-04
Classification: B60K,F16K,Y10T

Abstract:
An electromagnetic valve, comprising:a housing including a first passage, a second passage, a first pressure chamber communicating with said second passage, and a second pressure chamber; a moving core reciprocating in said housing; a stator provided in said housing and magnetically acting on said moving core; a first urging means for urging said moving core toward one direction in a reciprocating direction of said moving core; a coil generating a magnetic force between said moving core and said stator for moving said moving core toward the other direction in the reciprocating direction of said moving core; a pressure receiving member provided in said housing, said pressure receiving member located at the one direction side of said moving core and partitioning said first pressure chamber from said second pressure chamber, said pressure receiving member being operable by said moving core in the reciprocating direction; a valve member provided at a side of said pressure receiving member opposite to said moving core, said valve member including a first communication passage allowing said first passage to communicate with said first pressure chamber, said valve member being movable independently upon said pressure receiving member; a valve seat provided in said housing, on which said valve member seats; and a second urging means for urging said valve member toward said pressure receiving member, wherein said second pressure chamber is located at a moving core side of said pressure receiving member, when said pressure receiving member contacts said valve member, a communication between said first communication passage and said first pressure chamber is shut, when said valve member seats on said valve seat while said pressure receiving member shuts the communication between said first communication passage and said first pressure chamber, a communication between said first pressure chamber and said first passage is shut, and said pressure receiving member is movable in response to a pressure difference between said first pressure chamber and said second pressure chamber to allow a flow from said second passage to said first passage.