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US 2021/0189946 A1Published application
Engine turbulent jet ignition system
AssigneeBoard of Trustees of Michigan State University
InventorsHarold J. SCHOCK, Thomas R. STUECKEN
Life of this patent
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Abstract
An engine system employs a pre-assembled and/or removable cartridge. In another aspect, an ignitor, a fuel injector and an air inlet valve are all accessible from a top of a cartridge even after assembly of the cartridge to an engine cylinder head. A further aspect positions centerlines of an ignitor, a fuel injector and an air inlet valve angularly offset from each other and also angularly offset from a vertical centerline of a cartridge to which they are mounted.
Claims23
An engine ignition system comprising:
- (a) an engine cylinder head including an upwardly facing surface and a receptacle configured to be accessible to a piston cylinder;
- (b) a preassembled cartridge comprising:
- (i) a body including openings therein;
- (ii) a pre-chamber coupled to a bottom portion of the body, the pre-chamber including a pre-combustion cavity and at least one combustion exit aperture configured to be accessible to the piston cylinder;
- (iii) an ignitor located in a first of the body openings, the ignitor having a longitudinal centerline and a distal end in or adjacent to the pre-combustion cavity;
- (iv) a fuel injector located in a second of the body openings, the fuel injector having a longitudinal centerline and a distal end in or adjacent to the pre-combustion cavity;
- (v) an air inlet valve located in a third of the body openings, the air inlet valve having a longitudinal centerline and a distal end in or adjacent to the pre-combustion cavity;
- (vi) the centerlines of the ignitor, the fuel injector and the air inlet valve being angularly offset from each other and being angularly offset from a vertical centerline of the body and the pre-chamber;
- (vii) the ignitor, the fuel injector and the air inlet valve being secured within their respective body openings and being accessible, from a top of the body;
- (c) a fastener removably securing at least a portion of the cartridge within the receptacle of the engine cylinder head, and the fastener being removably fastened to the upwardly facing surface of the engine cylinder head.
7 more elements
An engine ignition system comprising a cartridge comprising:
- (a) a body including openings therein;
- (b) a pre-chamber coupled to a bottom portion of the body, the pre-chamber including a pre-combustion cavity and at least one combustion exit aperture;
- (c) an ignitor located in a first of the body openings, the ignitor having a longitudinal centerline and a distal end in or adjacent to the pre-combustion cavity;
- (d) a fuel injector located in a second of the body openings, the fuel injector having a longitudinal centerline and a distal end in or adjacent to the pre-combustion cavity;
- (e) an air inlet valve located in a third of the body openings, the air inlet valve having a longitudinal centerline and a distal end in or adjacent to the pre-combustion cavity;
- (f) the ignitor, the fuel injector and the air inlet valve being secured within their respective openings and being accessible, from a top of the body;
- (g) a flange located adjacent an upper portion of the body and including at least one fastener hole through the flange;
- and
- (h) the cartridge having a periphery with a substantially triangular top view shape and at least one curved peripheral section thereof.
6 more elements
An engine ignition system comprising a cartridge comprising:
- (a) a body including openings therein;
- (b) a pre-chamber coupled to the body, the pre-chamber including a pre-combustion cavity and at least one combustion exit aperture;
- (c) an ignitor located in a first of the body openings;
- (d) a fuel injector located in a second of the body openings;
- (e) an air inlet valve located in a third of the body openings;
- (f) a mounting flange projecting from the body;
- (g) the body of the cartridge having a largest longitudinal dimension greater than a largest longitudinal dimension of the pre-chamber;
- (h) a largest lateral dimension of the body being greater than a largest lateral dimension of the pre-chamber;
- (i) a portion of the body adjacent to the flange being laterally enlarged further away from a longitudinal centerline of the pre-chamber as compared to an opposite side of the body.
6 more elements
An engine ignition system comprising a cartridge comprising:
- (a) a pre-chamber including a pre-combustion cavity, combustion exit apertures and a longitudinal centerline;
- (b) an ignitor located in the cartridge with a distal end accessible to the pre-combustion cavity;
- (c) a fuel injector located in the cartridge with a distal end accessible to the pre-combustion cavity;
- (d) an air inlet valve located in the cartridge with a distal end accessible to the pre-combustion cavity;
- and
- (e) an air flow path of at least one of the exit apertures of the pre-chamber being offset angled from the longitudinal centerline of the pre-chamber such that air flowing back from a piston cylinder causes swirling of the air within the pre-chamber to assist in evaporation of any of the fuel remaining therein a fuel combustion in the pre-chamber.
3 more elements
Dependencies are inferred from the claim text.