Improved cylinder head cooling

Claim 2

A cylinder head for an internal combustion engine, said head comprising a cast member having spaced upper and lower decks connected by enclosing walls to define a coolant chamber, a plurality of spaced exhaust port-defining walls extending upwardly from said lower wall into said coolant chamber, said exhaust port walls being arranged in longitudinally spaced pairs of laterally spaced ports, a partial intermediate deck spaced between said upper and lower decks and intersecting said exhaust port walls so as to separate said coolant chamber intermediate at least certain of said exhaust ports into upper and lower sections, connecting walls extending between said intermediate and lower decks and the longitudinally adjacent exhaust port walls of two adjacent pairs of said laterally spaced ports so as to substantially close the laterally opposite sides of the portion of said coolant chamber lower section between said adjacent pairs of exhaust ports, said lower deck having a plurality of coolant openings therethrough and communicating with said closed portion of said coolant chamber, said coolant openings being vertically aligned with connecting openings in said connecting walls and said intermediate deck, permitting interconnection during manufacture of said closed lower chamber portion, with said upper chamber section and the adjacent open portions of said lower chamber section, and a tubular insert in each of said connecting openings, said inserts being closed at one end and open at the other, said closed end extending into and blocking said connecting openings in said intermediate deck, and the sides of said inserts blocking direct communication between said closed portion of said lower coolant chamber section and the remainder of said lower section, and openings in the walls of said inserts communicating said closed chamber portion with the open ends of said inserts to permit coolant flow through said inserts from the exterior of said head lower deck to said closed chamber portion, said closed coolant chamber portion communicating with the remainder of said coolant chamber through openings intermediate the laterally adjacent exhaust port walls of said two adjacent pairs of ports.

Claim 3

In a paRtially cast cylinder head member for an internal combustion engine, means defining a coolant chamber, said means including a lower deck having portions exposed to combustion in the engine cylinders, a plurality of exhaust port-defining walls extending upwardly into said coolant chamber from said lower deck and each terminating at a single exhaust opening through said lower deck, said exhaust ports being arranged in longitudinally spaced groups, the ports of each group being adapted for connection with an individual cylinder of an associated engine, said groups each including four ports laterally and longitudinally spaced in rectangular fashion, wall means enclosing a lower portion of said coolant chamber adjacent said lower deck and between two of said longitudinally spaced groups of exhaust ports, said enclosed lower portion communicating with the remainder of said coolant chamber through spaces between the pairs of exhaust port walls adjacent said enclosed lower portion, said lower deck having a pair of coolant openings therethrough, communicating with said enclosed lower portion of the coolant chamber, and said enclosing wall means having openings therethrough aligned with said pair of lower deck coolant openings and adapted to connect said enclosed lower portion laterally and vertically with other portions of said coolant chamber to provide interchamber core support during the casting process, and a pair of tubular insert members, each enclosed at one end and open at the other, with at least one opening in the tubular wall thereof spaced between the ends, said insert members each being mounted in one of said lower deck coolant openings and having their closed ends extending into the respective aligned openings in said enclosing wall means, said insert members being oriented (a) with their tubular wall openings connecting with the interior of said enclosed lower coolant chamber portion to communicate said enclosed portion with the exterior of said head through said insert members and lower deck openings, and (b) to block communication of said enclosed portion with the remainder of said coolant cavity through said aligned openings in said enclosing wall means.

Claim 4

In a paRtially cast cylinder head member for an internal combustion engine, means defining a coolant chamber, said means including a lower deck having portions exposed to combustion in the engine cylinders, a plurality of exhaust port-defining walls extending upwardly into said coolant chamber from said lower deck and each terminating at a single exhaust opening through said lower deck, said exhaust ports being arranged in longitudinally spaced groups, the ports of each group being adapted for connection with an individual cylinder of an associated engine, said groups each including four ports laterally and longitudinally spaced in rectangular fashion, wall means enclosing a lower portion of said coolant chamber adjacent said lower deck and between two of said longitudinally spaced groups of exhaust ports, said enclosed lower portion communicating with the remainder of said coolant chamber through spaces between the pairs of exhaust port walls adjacent said enclosed lower portion, said lower deck having a pair of coolant openings therethrough, communicating with said enclosed lower portion of the coolant chamber, and said enclosing wall means having openings therethrough aligned with said pair of lower deck coolant openings and adapted to connect said enclosed lower portion laterally and vertically with other portions of said coolant chamber to provide interchamber core support during the casting process, and a pair of tubular insert members, each enclosed at one end and open at the other, with at least one opening in the tubular wall thereof spaced between the ends, said insert members each being mounted in one of said lower deck coolant openings and having their closed ends extending into the respective aligned openings in said enclosing wall means, said insert members being oriented (a) with their tubular wall openings connecting with the interior of said enclosed lower coolant chamber portion to communicate said enclosed portion with the exterior of said head through said insert members and lower deck openings, and (b) to block communication of said enclosed portion with the remainder of said coolant cavity through said aligned openings in said enclosing wall means.

Claim 5

A cylinder head for a multi-cylinder internal combustion engine, said head comprising a cast member having spaced upper and lower decks connected by enclosing side and end walls to define a coolant chamber, a plurality of walls defining exhaust passages opening through one of said side walls and extending generally horizontally into said coolant chamber, said exhaust passages connecting with a plurality of spaced exhaust ports through said lower deck and defined by walls extending upwardly from said lower deck through said coolant chamber, said exhaust ports being arranged at longitudinally spaced cylinder positions in groups of four ports each, the ports of each group being longitudinally and laterally spaced in rectangular fashion for connection with an individual cylinder of such engine, a lateral supporting wall extending between said upper and lower decks intermediate each cylinder position, a component receiving tube secured in openings in the upper and lower decks at each cylinder position and spaced intermediate the exhaust port-defining walls for the respective position, first, second and third intermediate deck portions spaced between said upper and lower decks, said first portions extending longitudinally between said end walls and the adjacent exhaust passage walls, said second portions extending between the adjacent exhaust passages of the various cylinder positions and intersecting said lateral supporting walls and said third portions extending between the four exhaust port walls of each cylinder position and engaging their respective component receiving tubes, said intermediate deck portions together with said exhaust passage walls defining a partial intermediate deck separating said coolant chamber longitudinally of said exhaust ports into upper and lower sections, connecting walls closing the laterally opposite sides of said coolant chamber lower section beneath said first and second intermediate deck portions to form first and second closed lower coolant chamber portions, respectively, said lower deck having a plurality of coolant openings therethrough, including first coolant openings communicating with said first closed lower chamber portions and second coolant openings communicating with said second closed lower chamber portions, said coolant openings being vertically aligned with connecting openings in said connecting walls, and said second coolant openings being further aligned with connecting openings in said second intermediate deck portions, thereby permitting interconnection during manufacture of said closed lower chamber portions with said upper chamber section and the remaining adjacent lower portions of said lower chamber section, and a tubular insert in each of said connecting openings, said inserts being closed at one end and open at the other, said inserts'' closed ends extending into and blocking said connecting openings in said second intermediate deck portions, the sides of said inserts blocking communication between said closed lower portions of said coolant chamber and the remainder thereof, and openings in the sides of said inserts communicating said closed lower chamber portions with the inserts'' open ends to permit coolant flow from the exterior of said head lower deck to said closed chamber portions, said closed chamber portions communicating with the remainder of said coolant chamber through openings intermediate the respective laterally adjacent pairs of exhaust port walls.

Claim 6

A cylinder head for a multi-cylinder internal combustion engine, said head comprising a cast member having spaced upper and lower decks connected by enclosing side and end walls to define a coolant chamber, a plurality of walls defining exhaust passages opening through one of said side walls and extending generally horizontally into said coolant chamber, said exhaust passages connecting with a plurality of spaced exhaust ports through said lower deck and defined by walls extending upwardly from said lower deck through said coolant chamber, said exhaust ports being arranged at longitudinally spaced cylinder positions in groups of four ports each, the ports of each group being longitudinally and laterally spaced in rectangular fashion for connection with an individual cylinder of such engine, a lateral supporting wall extending between said upper and lower decks intermediate each cylinder position, a component receiving tube secured in openings in the upper and lower decks at each cylinder position and spaced intermediate the exhaust port-defining walls for the respective position, first, second and third intermediate deck portions spaced between said upper and lower decks, said first portions extending longitudinally between said end walls and the adjacent exhaust passage walls, said second portions extending between the adjacent exhaust passages of the various cylinder positions and intersecting said lateral supporting walls and said third portions extending between the four exhaust port walls of each cylinder position and engaging their respective component receiving tubes, said intermediate deck portions together with said exhaust passage walls defining a partial intermediate deck separating said coolant chamber longitudinally of said exhaust ports into upper and lower sections, connecting walls closing the laterally opposite sides of said coolant chamber lower section beneath said first and second intermediate deck portions to form first and second closed lower coolant chamber portions, respectively, said lower deck having a plurality of coolant openings therethrough, including first coolant openings communicating with said first closed lower chamber portions and second coolant openings communicating with said second closed lower chamber portions, said coolant openings being vertically aligned with connecting openings in said connecting walls, and said second coolant openings being further aligned with connecting openings in said second intermediate deck portions, thereby permitting interconnection during manufacture of said closed lower chamber portions with said upper chamber section and the remaining adjacent lower portions of said lower chamber section, and a tubular insert in each of said connecting openings, said inserts being closed at one end and open at the other, said inserts'' closed ends extending into and blocking said connecting openings in said second intermediate deck portions, the sides of said inserts blocking communication between said closed lower portions of said coolant chamber and the remainder thereof, and openings in the sides of said inserts communicating said closed lower chamber portions with the inserts'' open ends to permit coolant flow from the exterior of said head lower deck to said closed chamber portions, said closed chamber portions communicating with the remainder of said coolant chamber through openings intermediate the respective laterally adjacent pairs of exhaust port walls.