Combination intake and exhaust valve assembly

A combination intake and exhaust valve assembly for use in an internal combustion engine, said valve assembly comprising an intake valve having an intake valve force application portion to which force is applied to effect movement of said intake valve from a closed position blocking flow to a combustion chamber of the internal combustion engine through engagement of an annular rim portion of a head portion of said intake valve with an intake valve seat defined by a portion of a cylinder head of the internal combustion engine that at least partially overlaps said annular rim portion of said intake valve to an open position enabling flow to the combustion chamber of the internal combustion engine during operation of the internal combustion engine, and an exhaust valve having a first force application portion to which force is applied to effect movement of said exhaust valve from a closed position blocking flow from the combustion chamber of the internal combustion engine to an open position enabling flow from the combustion engine during operation of the internal combustion engine, said intake valve including a force transmitting portion which engages a second force application portion on said exhaust valve to transmit force from said intake valve to said exhaust valve and move said exhaust valve with said intake valve during movement of said intake valve from the closed position to the open position with said exhaust valve in the closed position.

An internal combustion engine comprising:

• an engine block defining a cylinder;
• a cylinder head connected with said block;
• said cylinder head having an intake passage communicating with the cylinder for directing intake air into the cylinder, and an intake valve seat;
• an intake valve supported by said cylinder head for reciprocating movement, said intake valve having a head including an annular rim portion;
• said intake valve being movable relative to said cylinder head between a closed condition in which said annular rim portion of said intake valve head is in sealing engagement with said intake valve seat defined by a portion of said cylinder head that at least partially overlaps said annular rim portion to block fluid flow through said intake passage, and an open condition in which said intake valve head is spaced from said intake valve seat to enable fluid flow through said intake passage into said cylinder;
• said cylinder head having an exhaust passage communicating with the cylinder for directing exhaust fluid out of the cylinder;
• an exhaust valve having a head;
• said intake valve having an exhaust valve seat;
• said exhaust valve being movable relative to said cylinder head between a closed condition in which said exhaust valve head is in sealing engagement with said exhaust valve seat on said intake valve to block fluid flow through said exhaust passage, and an open condition in which said exhaust valve head is spaced apart from said exhaust valve seat on said intake valve to enable fluid flow out of said cylinder through said exhaust passage.

An internal combustion engine comprising:

• an engine block defining a cylinder;
• a cylinder head connected with said block;
• said cylinder head having an intake passage communicating with the cylinder for directing intake air into the cylinder and an exhaust passage communicating with the cylinder for directing exhaust fluid out of the cylinder;
• an intake valve movable relative to said cylinder head between a closed condition in which an annular rim portion of a head of said intake valve engages a portion of said cylinder head that at least partially overlaps said annular rim portion and blocks fluid flow through said intake passage and an open condition to enable fluid flow through said intake passage into said cylinder;
• an exhaust valve movable relative to said cylinder head between a closed condition in which said exhaust valve blocks fluid flow through said exhaust passage and an open condition to enable fluid flow out of said cylinder through said exhaust passage;
• said intake valve and said exhaust valve being supported on said cylinder head for reciprocating movement along a common axis, said intake valve and said exhaust valve being coaxial with each other.