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

Claim 10:
11. An engine apparatus comprising:
(a) a preassembled cartridge comprising:
i. a body including openings therein;
ii. a pre-chamber coupled to the body, the pre-chamber including a pre-combustion cavity and at least one combustion exit aperture;
iii. an ignitor located in a first of the body openings;
iv. an air inlet valve located in a third of the body openings;

(b) a piston cylinder;
(c) a piston linearly advancing and retracting along a longitudinal axis within the main piston cylinder;
(d) a single fuel injector associated with the main piston cylinder and the pre-chamber, located external to the pre-combustion cavity, the fuel injector including an injection tip located in the main piston cylinder;
(e) a main air intake valve associated with an air inlet in the main piston cylinder external to the pre-chamber; and
(f) the pre-chamber comprising a concave-curved cup being coaxial with the longitudinal axis of the piston.