Patent ID: 11939905
Assignee: BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 18:
19. An engine apparatus comprising:
(a) a pre-chamber including a pre-combustion cavity and multiple combustion exit apertures;
(b) an ignitor having a distal end in the pre-combustion cavity;
(c) a pre-chamber air inlet valve having a portion located in a passageway directly entering the pre-combustion cavity;
(d) a main piston cylinder including a main combustion chamber;
(e) a single fuel injector located external to the pre-combustion cavity, the single fuel injector including an injection tip located in the main combustion chamber, and the single fuel injector being spaced away from the pre-chamber;
(f) the single fuel injector being configured to emit a first amount of fuel into the main combustion chamber which is pushed into at least one of the apertures for subsequent pre-combustion by the ignitor within the pre-chamber cavity;
(g) the single fuel injector being configured to subsequently emit at least a second amount of the fuel into the main combustion chamber, the second amount of fuel being 3-15% of the first amount of fuel;
(h) the pre-chamber being part of a cartridge with the ignitor, the pre-chamber air inlet valve and the pre-chamber cavity being preassembled to the cartridge, and the preassembled cartridge being configured for removable mounting to an engine cylinder head; and
(i) the cartridge not having a fuel injector mounted thereto and the fuel not being directly injected into the pre-chamber cavity except indirectly through at least one of the apertures.