US 10,590,813 B2 · Internal combustion engine

Abstract

Internal combustion engines having multi-stage telescoping poppet valves in lieu of conventional poppet valves are disclosed. The engines may have pistons with a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The piston heads may include one or more depressions and may be domed to facilitate the movement of air/charge in the cylinder. The engines may also have non-circular, preferably rectangular, cross-section pistons and cylinders. The engines also may include a split crankshaft. The engines may use the pumping motion of the engine piston to supercharge the cylinder with air/charge. The engines also may operate in an inverted orientation in which the piston is closer to the local gravitationally dominant terrestrial body's center of gravity at top dead center position than at bottom dead center position.

Claims23

Dependent claims

An internal combustion engine comprising:

an engine cylinder having a cylinder wall;
a piston disposed in the engine cylinder, said piston having a skirt and a head;
a combustion chamber adjacent to the piston head defined by the cylinder wall;
and
a poppet valve assembly disposed in said engine cylinder, said poppet valve assembly having an outer poppet valve with an outer poppet valve hollow stem, an outer poppet valve lower head, and an outer poppet valve intermediary cage connecting the outer poppet valve hollow stem to the outer poppet valve lower head, and an inner poppet valve having an inner poppet valve stem and an inner poppet valve lower head,
wherein said inner poppet valve stem is slidably disposed in the outer poppet valve hollow stem, and said inner poppet valve lower head is movable within said outer poppet valve intermediary cage, and said inner poppet valve lower head has a range of motion confined within said outer poppet valve intermediary cage, and
wherein said outer poppet valve is moveable relative to the engine cylinder.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/938,130Filed 28 Mar 2018 · continuation in part

Priority

30 Mar 2017

Published

US 2018/0283235 A14 Oct 2018

Granted

17 Mar 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification27 codes

F01L 3/085
Valves guides; Sealing of valve stem, e.g. sealing by lubricant: valve cages
F01L 1/08
By means of cams, camshafts, cam discs, eccentrics or the like: shape of cams
F01L 1/185
Rocking arms or levers: overhead end-pivot rocking arms
F01L 1/28
Valve-gear or valve arrangements, e.g. lift-valve gear: characterised by the provision of coaxial valves; characterised by the provision of valves…

Family

Application62/479,013Us provisional application · filed 30 Mar 2017

Application62/491,629Us provisional application · filed 28 Apr 2017

Application62/501,295Us provisional application · filed 4 May 2017

Application15/903,636Parent of this continuation-in-part · filed 23 Feb 2018

Application15/934,742Parent of this continuation-in-part · filed 23 Mar 2018

Application15/934,625Parent of this continuation-in-part · filed 23 Mar 2018

Application15/936,713Parent of this continuation-in-part · filed 27 Mar 2018

Application15/937,293Parent of this continuation-in-part · filed 27 Mar 2018

US 2018/0283235 A1Pre-grant publication · published 4 Oct 2018

US 10,465,629 B2Related patent

US 10,526,953 B2Related patent