Exhaust port structure

Claim 2

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, a valve seat situated in the cylinder dome communicating with said cylinder, valve guide means for guiding movements of said valve, means for actuating said valve in timed sequence to engage and disengage from said valve seat, the improvement comprising: an exhaust port structure secured to said cylinder dome and extending therefrom to form an exhaust passage, said port structure being formed with an opening and the stem of said valve extending through said opening to engage with and disengage from said valve seat upon said valve being actuated by said actuating means, the portioN of said exhaust port structure intermediate said valve seat and said valve stem being relatively flexible to absorb distortions as caused by heat or other stresses, and means disposed intermediate said valve guide means and said valve seat and extending between the edge of said port structure forming said opening and said valve stem to provide a universal alignment connection therebetween whereby distortions in said exhaust port structure are not transmitted to said valve stem.

Claim 3

The invention as defined in claim 1 and in which said last mentioned means comprises a thimble-shaped misalignment compensating member having an upper radially outwardly extending spherical edge engaging with an axially extending annular surface of said exhaust port structure to form said universal alignment connection.

Claim 4

The invention as defined in claim 2 and in which said misalignment compensating member includes a portion engaging the surface of the stem with minimum clearance of said valve to scrape clean said surface as said valve is moved between an open and a closed position.

Claim 5

In an internal combustion engine having a cylinder, an exhaust valve for said cylinder, a valve guide for guiding reciprocating movement of the stem of said valve, and a valve seat for the seating of the head of said valve, the improvement which comprises: a curved exhaust conduit provided with an inlet in which said seat is situated, an outlet and an opening intermediate said inlet and said outlet; a generally thimble-shaped misalignment compensating seal member provided with an opening at the apex thereof for movement of said stem therethrough; said member being unattachedly supported by said exhaust conduit and, together with said valve stem, substantially closing said opening in said exhaust conduit, said tubular-shaped member positioned with a concave side facing said valve guide means; means rigidly connecting said valve seat with said valve guide means such that tilting of said valve seat will effect an accommodating tilt of said valve guide; and cooling means for cooling said valve guide.

Claim 6

In an internal combustion engine having a cylinder, an exhaust valve for said cylinder, a valve guide for guiding reciprocating movement of the stem of said valve, and a valve seat for the seating of the head of said valve, the improvement which comprises: a curved exhaust conduit provided with an inlet in which said seat is situated, an outlet and an opening intermediate said inlet and said outlet; a generally thimble-shaped misalignment compensating seal member provided with an opening at the apex thereof for movement of said stem therethrough; said member being unattachedly supported by said exhaust conduit and, together with said valve stem, substantially closing said opening in said exhaust conduit, said tubular-shaped member positioned with a concave side facing said valve guide means; means rigidly connecting said valve seat with said valve guide means such that tilting of said valve seat will effect an accommodating tilt of said valve guide; and cooling means for cooling said valve guide.

Claim 7

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, said valve having a stem, means for actuating said valve in timed sequence, a valve seat opening to said cylinder and forming a passage connected with said cylinder through said valve seat; the improvement comprising: valve guide structure for supporting said valve in position to engage and disengage from said valve seat upon actuation by said actuating means and including means defining a cooling air space about said valve stem, said valve guide structure comprising a finned cooling member encompassing the stem of said valve, support means for said valve guide structure, said support means being secured to said cylinder dome; exhaust port structure for conducting the waste combustion products from said cylinder, an opening in said exhaust port structure concentric with respect to said valve seat, the stem of said valve extending through said opening, a seal disposed between said valve stem and said exhaust port structure to prevent fluid leakage past said opening and into said cooling air space.

Claim 8

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, said valve having a stem, means for actuating said valve in timed sequence, a valve seat opening to said cylinder and forming a passage connected with said cylinder through said valve seat; the improvement comprising: valve guide structure for supporting said valve in position to engage and disengage from said valve seat upon actuation by said actuating means and including means defining a cooling air space about said valve stem, said valve guide structure comprising a finned cooling member encompassing the stem of said valve, support means for said valve guide structure, said support means being secured to said cylinder dome; exhaust port structure for conducting the waste combustion products from said cylinder, an opening in said exhaust port structure concentric with respect to said valve seat, the stem of said valve extending through said opening, a seal disposed between said valve stem and said exhaust port structure to prevent fluid leakage past said opening and into said cooling air space.

Claim 9

An internal combustion engine having a cylinder, a cylinder dome defined in the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, a valve seat situated in the cylinder dome communicating with said cylinder, valve guide means for guiding movements of said valve means, means for actuating said valve in timed sequence to engage and disengage from said valve seat, the improvement comprising: an exhaust port structure secured to said cylinder dome and extending therefrom to form an exhaust path, said exhaust port structure being formed with an opening, the stem of said valve extending through said opening so that the valve engages with and disengages from said valve seat upon said valve being actuated by said actuating means, the portion of said exhaust port structure intermediate said valve seat and said valve stem being relatively flexible to absorb distortions caused by heat or other stresses, and means extending between the edge of said port structure forming said opening and said valve stem to provide a universal alignment connection therebetween whereby distortions in said exhaust port structure are not directly transmitted to said valve stem, said last mentioned means comprising a thimble-shaped misalignment compensating member having an upper radially outwardly spherical edge engaging with an axially extending annular surface of said exhaust port structure to form said universal alignment connection and including a portion engaging the surface of the stem with a minimum clearance of said valve to scrape clean said surface as said valve is moved between an open and closed position, a finned cooling member supporting said valve and disposed outwardly of said exhaust port structure and compensating member, and a seal carried by said misalignment compensating member to prevent fluid leakage from said exhaust port structure into the area of said cooling member.

Claim 10

An internal combustion engine having a cylinder, a cylinder dome defined in the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, a valve seat situated in the cylinder dome communicating with said cylinder, valve guide means for guiding movements of said valve means, means for actuating said valve in timed sequence to engage and disengage from said valve seat, the improvement comprising: an exhaust port structure secured to said cylinder dome and extending therefrom to form an exhaust path, said exhaust port structure being formed with an opening, the stem of said valve extending through said opening so that the valve engages with and disengages from said valve seat upon said valve being actuated by said actuating means, the portion of said exhaust port structure intermediate said valve seat and said valve stem being relatively flexible to absorb distortions caused by heat or other stresses, and means extending between the edge of said port structure forming said opening and said valve stem to provide a universal alignment connection therebetween whereby distortions in said exhaust port structure are not directly transmitted to said valve stem, said last mentioned means comprising a thimble-shaped misalignment compensating member having an upper radially outwardly spherical edge engaging with an axially extending annular surface of said exhaust port structure to form said universal alignment connection and including a portion engaging the surface of the stem with a minimum clearance of said valve to scrape clean said surface as said valve is moved between an open and closed position, a finned cooling member supporting said valve and disposed outwardly of said exhaust port structure and compensating member, and a seal carried by said misalignment compensating member to prevent fluid leakage from said exhaust port structure into the area of said cooling member.

Claim 11

An internal combustion engine having a cylinder, a cylinder dome defined in the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, a valve seat situated in the cylinder dome communicating with said cylinder, valve guide means for guiding movements of said valve means, means for actuating said valve in timed sequence to engage and disengage from said valve seat, the improvement comprising: an exhaust port structure secured to said cylinder dome and extending therefrom to form an exhaust path, said exhaust port structure being formed with an opening, the stem of said valve extending through said opening so that the valve engages with and disengages from said valve seat upon said valve being actuated by said actuating means, the portion of said exhaust port structure intermediate said valve seat and said valve stem being relatively flexible to absorb distortions caused by the heat or other stresses, and means extending between the edge of said port structure forming said opening and said valve stem to provide a universal alignment connection therebetween whereby distortions in said exhaust port structure are not directly transmitted to said valve stem, said last mentioned means comprising a thimble-shaped misalignment compensating member having an upper radially outwardly sperhical edge engaging with an axially extending annular surface of said exhaust port structure to form said universal alignment connection and including a portion engaging the surface of the stem with a minimum clearance of said valve to scrape clean said surface as said valve is moved between an open and closed position, support means secured to said cylinder dome to support the stem of said valve, and a finned member carried by said support member and encompaissing said valve seat.

Claim 12

An internal combustion engine having a cylinder, a cylinder dome defined in the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, a valve seat situated in the cylinder dome communicating with said cylinder, valve guide means for guiding movements of said valve means, means for actuating said valve in timed sequence to engage and disengage from said valve seat, the improvement comprising: an exhaust port structure secured to said cylinder dome and extending therefrom to form an exhaust path, said exhaust port structure being formed with an opening, the stem of said valve extending through said opening so that the valve engages with and disengages from said valve seat upon said valve being actuated by said actuating means, the portion of said exhaust port structure intermediate said valve seat and said valve stem being relatively flexible to absorb distortions caused by the heat or other stresses, and means extending between the edge of said port structure forming said opening and said valve stem to provide a universal alignment connection therebetween whereby distortions in said exhaust port structure are not directly transmitted to said valve stem, said last mentioned means comprising a thimble-shaped misalignment compensating member having an upper radially outwardly sperhical edge engaging with an axially extending annular surface of said exhaust port structure to form said universal alignment connection and including a portion engaging the surface of the stem with a minimum clearance of said valve to scrape clean said surface as said valve is moved between an open and closed position, support means secured to said cylinder dome to support the stem of said valve, and a finned member carried by said support member and encompaissing said valve seat.

Claim 13

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, means for actuating said valve in timed sequence, a valve seat opening to said cylinder and forming a passage connected with said cylinder through said valve seat; the improvement comprising: valve guide structure for supporting said valve in position to engage and disengage from said valve seat upon actuation by said actuating means, support means mounting said valve guide structure in a manner permitting an accommodating positioning of said valve guide structure upon distortion of said cylinder dome to thereby maintain alignment of said valve with said valve seat; said valve guide structure comprising a finned cooling member supported by said support means and encompassing the stem of said valve; meanS disposed intermediate said valve seat and said valve guide structure to prevent fluid leakage from said passage from impinging upon said valve guide structure.

Claim 14

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, means for actuating said valve in timed sequence, a valve seat opening to said cylinder and forming a passage connected with said cylinder through said valve seat; the improvement comprising: valve guide structure for supporting said valve in position to engage and disengage from said valve seat upon actuation by said actuating means, support means mounting said valve guide structure in a manner permitting an accommodating positioning of said valve guide structure upon distortion of said cylinder dome to thereby maintain alignment of said valve with said valve seat; said valve guide structure comprising a finned cooling member supported by said support means and encompassing the stem of said valve; meanS disposed intermediate said valve seat and said valve guide structure to prevent fluid leakage from said passage from impinging upon said valve guide structure.

Claim 15

The invention as defined in claim 8 and in which said support means comprises an arm portion extending from said cylinder dome.

Claim 16

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, means for actuating said valve in timed sequence, a valve seat opening to said cylinder and forming a passage connected with said cylinder through said valve seat; the improvement comprising: valve guide structure for supporting said valve in position to engage and disengage from said valve seat upon actuation by said actuating means, support means mounting said valve guide structure in a manner permitting an accommodating positioning of said valve guide structure upon distortion of said cylinder dome to thereby maintain alignment of said valve with said valve seat; said support means comprising a tubular member having a circular end portion joined to and extending from said cylinder dome with the axis of said tubular member corresponding with the axes of said valve and said valve seat.

Claim 17

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, means for actuating said valve in timed sequence, a valve seat opening to said cylinder and forming a passage connected with said cylinder through said valve seat; the improvement comprising: valve guide structure for supporting said valve in position to engage and disengage from said valve seat upon actuation by said actuating means, support means mounting said valve guide structure in a manner permitting an accommodating positioning of said valve guide structure upon distortion of said cylinder dome to thereby maintain alignment of said valve with said valve seat; said support means comprising a tubular member having a circular end portion joined to and extending from said cylinder dome with the axis of said tubular member corresponding with the axes of said valve and said valve seat.

Claim 18

The invention as defined in claim 10 and in which said tubular member includes a laterally removed portion, said exhaust port structure extending through said laterally removed portion of said tubular member.

Claim 19

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, a valve for exhausting waste combustion products from said cylinder, means for actuating said valve in tuned sequence, a valve seat opening to said cylinder and forming a passage connected with said cylinder through said valve seat; the improvement comprising: valve guide structure for supporting said valve in position to engage and disengage from said valve seat upon actuation by said actuating means, support means mounting said valve guide structure in a manner permitting an accommodating positioning of said valve guide structure upon distortion of said valve with said valve seat; means disposed intermediate said valve seat and said guide structure to prevent fluid leakage from said passage from impinging upon said valve guide structure; exhaust port structure for conducting the waste combustion products from said cylinder, an opening in said exhaust port structure concentric with respect to said valve seat, the stem of said valve extending through said opening; and said last mentioned means being carried by said exhaust port structure to engage the surface of said valve stem as said valve is opened and closed to scrape and thereby clean the surface of said valve stem.

Claim 20

In an internal combustion engine having a cylinder, a cylinder dome defining the upper portion of said cylinder, a valve for exhausting waste combustion products from said cylinder, a valve for exhausting waste combustion products from said cylinder, means for actuating said valve in tuned sequence, a valve seat opening to said cylinder and forming a passage connected with said cylinder through said valve seat; the improvement comprising: valve guide structure for supporting said valve in position to engage and disengage from said valve seat upon actuation by said actuating means, support means mounting said valve guide structure in a manner permitting an accommodating positioning of said valve guide structure upon distortion of said valve with said valve seat; means disposed intermediate said valve seat and said guide structure to prevent fluid leakage from said passage from impinging upon said valve guide structure; exhaust port structure for conducting the waste combustion products from said cylinder, an opening in said exhaust port structure concentric with respect to said valve seat, the stem of said valve extending through said opening; and said last mentioned means being carried by said exhaust port structure to engage the surface of said valve stem as said valve is opened and closed to scrape and thereby clean the surface of said valve stem.

Claim 21

The invention as defined in claim 12 and in which said support means comprises a pair of arm members extending from said cylinder dome.

Claim 22

The invention as defined in claim 12 and including a cooling air space encompassing said valve guide structure.