Patent ID: 6443111
Filing Date: 2002-09-03
Classification: F01L,F02B,F02D,F02F,Y02T

Abstract:
A valve system for an internal combustion engine comprising at least one cylinder defining a bore for receiving a piston, a cylinder head adjacent to said bore, a combustion chamber defined within the bore between the piston and cylinder head, an intake manifold and an exhaust manifold adjacent to the cylinder head, valve seats in the cylinder head which each provide communication between the combustion chamber and one of the exhaust manifold and intake manifold, comprising;at least three intake valves associated with the cylinder for selectively controlling communication between the intake manifold and the combustion chamber, the valves each have a poppet located in one of the valve seats for selectively opening and closing communication between the intake manifold and combustion chamber through said valve seat, a poppet shaft attached to the poppet and each valve further comprises a solenoid for selectively pushing the poppet out of its valve seat and toward the combustion chamber to open said valve, each valve further comprises a T-cap attached onto the poppet shaft fully opposite the poppet, the T-cap is made of a ferrous metal, and the solenoid comprises a solenoid coil mounted between the poppet and the T-cap, the solenoid coil coaxial with the poppet shaft, wherein the T-cap is attracted to the solenoid coil when the solenoid coil is energized to displace the poppet from the valve seat to open the valve, each T-cap comprises a flange and a barrel portion, the barrel portion coaxial with the poppet shaft, the valve further having a limit sleeve mounted between the cylinder head and the T-cap, the poppet shaft extending through the limit sleeve for limiting the downward travel of the poppet when the barrel reaches the limit sleeve; and each valve is independently operated by a control signal.