US 10,450,943 B2Granted

Otto and diesel cycles employing spinning gas

AssigneeThe Trustees of Princeton University

InventorsVasily Geyko, Nathaniel Fisch

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Abstract

An internal combustion engine is disclosed and includes a main cylinder and main piston that are relatively axially displaceable along a main axis to define a variable volume main working chamber. At least one valve is configured to admit air and fuel into the working chamber forming an air/fuel mixture. The main cylinder is configured to cause the air/fuel mixture in the main cylinder to spin rapidly enough to cause a substantive change in the heat capacity of the air/fuel mixture creating a spinning air/fuel mixture. The main cylinder and main piston are configured to compress the spinning air/fuel mixture to create an ignitable spinning air/fuel mixture. The spinning air/fuel mixture is ignited and the main cylinder and main piston are configured to extract mechanical energy from the ignited spinning air/fuel mixture. An exhaust valve is configured to exhaust combustion products from the main working chamber.

Claims9

Dependent claims

An internal combustion engine comprising:

a variable volume main working chamber, the main working chamber comprising:
a main cylinder;
a main piston disposed within the main cylinder, the main piston being axially displaceable along a main axis;
and
an intake valve configured to admit air into the main working chamber when the intake valve is open, the air axially rotating when in the main working chamber;
a variable volume slave chamber coupled to the main working chamber, the slave chamber comprising:
a slave cylinder;
and
a slave piston disposed within the slave cylinder, the slave piston being axially displaceable along the main axis;
and
a between-cylinders valve (BCV) disposed between the main cylinder and the slave cylinder, the BCV configured to selectively:
open to release the axially rotating air into the slave chamber to create spinning air in the main working chamber that axially rotates rapidly enough to cause a substantive change in the heat capacity of the spinning air with fuel to be admitted in the main working chamber after the substantive change in the heat capacity of the spinning air to create an air/fuel mixture;
and
close to allow for combustion of the air/fuel mixture.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/669,936Filed 26 Mar 2015 · us provisional application
Priority: 27 Mar 2014
Published: US 2015/0275744 A11 Oct 2015
Granted: 22 Oct 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F02B 75/28
Other engines: engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
F02B 31/02
Modifying induction systems for imparting a rotation to the charge in the cylinder: in engines having inlet valves arranged eccentrically to…
Y02T 10/12
Internal combustion engine [ICE] based vehicles: improving ICE efficiencies
F02B
Internal-combustion piston engines