Patent ID: 9453456
Filing Date: 2016-09-27
CPC Classification: F02B,F02M,Y02T

Claim Text:
1. A solenoid valve for a pre-chamber, comprising: a valve body defining an inlet port fluidly coupled with a fuel line at a first end portion thereof, an outlet port fluidly coupled with the pre-chamber at a second end portion thereof, and a passage fluidly coupling the inlet port with the outlet port; a valve stem slidably disposed in the passage between a first position and a second position, a first end portion of the valve stem configured to engage the outlet port in the first position to thereby prevent fluid communication therethrough; a biasing member disposed in the passage and configured to apply a biasing force to the valve stem to thereby actuate the valve stem to the first position and engage the first end portion of the valve stem with the outlet port; a solenoid coupled with the valve body and configured to actuate the valve stem to the second position to thereby disengage the first end portion of the valve stem from the outlet port and allow fluid communication therethrough; and a stop collar coupled with the valve stem and disposed proximal a lower portion of the valve body, the stop collar and the lower portion of the valve body defining a stop gap therebetween, wherein the biasing member is disposed between the stop collar and an inner end surface of the lower portion of the valve body, the biasing member configured to apply the biasing force to the valve stem via the stop collar coupled therewith.