Internal combustion piston engines

Claim 1

A LIQUID-COOLED CYLINDER HEAD, FOR A FUEL INJECTION INTERNAL COMBUSTION PISTON ENGINE, COMPRISING A PLURALITY OF LIQUID-IMPERVIOUS AND GAS-IMPERVIOUS WALLS DEFINING AN AIR INLET PASSAGE, AN EXHAUST GAS PASSAGE, A FIRST COOLANT CHAMBER SURROUNDING SAID EXHAUST GAS PASSAGE, A COOLANT OUTLET FROM SAID FIRST COOLANT CHAMBER, A SECOND COOLANT CHAMBER, AND A COOLANT INLET TO SAID FIRST COOLANT CHAMBER, SAID CYLINDER HEAD DEFINING A SECOND COOLANT INLET ARRANGED TO DELIVER COOLANT DIRECTLY INTO THE FIRST COOLANT CHAMBER TO IMPINGE ON THE EXHAUST GAS PASSAGE, SAID COOLANT OUTLET BEING ARRANGED ADJACENT THE EXHAUST GAS PASSAGE WHEREBY SUBSTANTIALLY ALL THE COOLANT THAT FLOWS THROUGH THE CYLINDER HEAD WILL ALSO FLOW OVER THE EXHAUST GAS PASSAGE, ONE OF SAID WALLS DEFINING A SUBSTANTIALLY PART SPHERICAL SURFACE FOR FORMING A BOUNDARY OF A COMBUSTION CHAMBER, SAID AIR INLET PASSAGE AND SAID EXHAUST, GAS PASSAGE EXTENDING THROUGH SAID ONE WALL INTO SAID COMBUSTION CHAMBER, SAID FIRST COOLANT CHAMBER ARRANGED IMMEDIATELY ADJACENT SAID ONE WALL, ANOTHER OF SAID WALLS SEPARATING THE FIRST COOLANT CHAMBER FROM THE SECOND COOLANT CHAMBER WHEREBY THE FIRST COOLANT CHAMBER IS ARRANGED INTERMEDIATE THE SECOND COOLANT CHAMBER AND SAID COMBUSTION CHAMBER, SAID ONE WALL DEFINING INLET AND EXHAUST VALVE SEAT MEANS RESPECTIVELY AT THE JUNCTIONS OF THE AIR INLET AND EXHAUST GAS PASSAGES WITH SAID COMBUSTION CHAMBER, SAID INLET AND EXHAUST VALVE SEAT MEANS LYING IN RESPECTIVE INCLINED PLANES EACH SUBSTANTIALLY TANGENTIAL TO SAID PART SPHERICAL SURFACE FOR ENGAGEMENT BY THE HEADS OF RESPECTIVE POPPET VALVES, SAID CYLINDER HEAD DEFINING VALVE GUIDE MEANS FOR SUPPORTING THE SAID POPPET VALVES SUCH THAT THE POPPET VALVE FOR THE AIR INLET PASSAGE WILL BE INCLINED AWAY FROM THE POPPET VALVE FOR THE EXHAUST GAS PASSAGE, SAID ONE WALL DEFINING A SEATING BETWEEN SAID INLET AND EXHAUST VALVE SEAT MEANS FOR SUPPORTING A FUEL INJECTOR, SAID ANOTHER WALL DEFINING A COOLANT PASSAGE INTERCONNECTING THE FIRST AND SECOND COOLANT CHAMBERS, AND SAID COOLANT PASSAGE BEING ARRANGED TO DIRECT A FLOW OF COOLANT FROM THE SECOND COOLANT CHAMBER TO IMPINGE ON THE SAID ONE WALL BETWEEN THE SEATING FOR THE FUEL INJECTOR AND THE INLET AND EXHAUST VALVE SEAT MEANS.