Patent ID: 6394073
Filing Date: 2002-05-28
Classification: F02M

Abstract:
A hydraulic valve with hydraulically assisted opening comprising:a valve body defining a fluid passage, said fluid passage having an upstream segment and a downstream segment; a moveable valve member at least partially positioned within said valve body, an end of said valve member including a hydraulic surface that defines a portion of said downstream segment; said upstream segment of said fluid passage being closed to said downstream segment when said valve member is in a closed position; said upstream segment of said fluid passage being fluidly connected to said downstream segment when said valve member is away from said closed position; an electrical actuator attached to said valve body and being operable in an energized state to move said valve member toward said closed position; a spring operably positioned to bias said valve member toward a fully open position; said upstream segment of said fluid passage is fluidly connected to a source of high pressure fluid; said downstream segment of said fluid passage is fluidly connected to a low pressure reservoir; a portion of said downstream segment is a turbulence chamber; said hydraulic surface is exposed to fluid pressure in said turbulence chamber; and an amount of fuel flowing from said upstream segment to said downstream segment having a dynamic pressure, said turbulence chamber being shaped and positioned to convert a portion of said dynamic pressure into a stagnation pressure.