Patent ID: 11959405
Assignee: JAGUAR LAND ROVER LIMITED
Field: Environmental technology (Chemistry)
Classification: CPC F  Y | IPC F

Claim 15:
16. A valve seat for a poppet valve of an internal combustion engine, wherein the poppet valve comprises a head and a stem behind the head, the valve seat comprising:
an aperture configured to form a seal with the head of the poppet valve when the poppet valve is in a closed position; and
a peripheral body defining, at least in part, at least one port shaped and sized to enable injection of liquid or gas from a cylinder head of the internal combustion engine into a gas stream behind the head of the poppet valve;
wherein the valve seat is an exhaust valve seat;
wherein the at least one port is shaped and sized to enable injection of secondary air from the cylinder head into the gas stream;
wherein the peripheral body defines, at least in part, a plurality of ports;
wherein a portion of an exterior surface of the body of the valve seat facing radially away from the aperture is stepped radially inwardly to provide space for at least part of a manifold for distributing the liquid or gas to different port locations around the valve seat.