US 12,460,563 B2
Combustion injection and control method for rotary valve engine
Sikandar Khan, Dhahran (SA); . Fayyaz, Dhahran (SA); Hassan Javed, Angelholm (SE); Muhammad Waqas, Mianwali (PK); and Agha Muhammad Jazim, Karachi (PK)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Jun. 25, 2025, as Appl. No. 19/248,574.
Application 19/248,574 is a continuation of application No. 19/183,677, filed on Apr. 18, 2025, granted, now 12,366,183.
Claims priority of provisional application 63/640,474, filed on Apr. 30, 2024.
Prior Publication US 2025/0334063 A1, Oct. 30, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. F01L 7/02 (2006.01); F01L 1/02 (2006.01); F01L 1/34 (2006.01)
CPC F01L 7/026 (2013.01) [F01L 1/024 (2013.01); F01L 1/34 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A combustion injection and control method for an independent rotary valve engine, comprising:
installing an intake rotary valve into a first channel of a cylinder head;
installing an exhaust rotary valve into a second channel in the cylinder head, wherein the second channel is parallel to the first channel;
connecting a bidirectional servo motor on an engine crankcase;
connecting a pulley to a servo motor shaft of the bidirectional servo motor and a first end of an inner shaft of the intake rotary valve;
connecting, by a sprocket and chain mechanism, a crankshaft located in a bore in the engine crankcase to an outer sleeve of the intake rotary valve and to the exhaust valve;
connecting, by a connecting rod, a piston located within a combustion chamber of a cylinder block to the crankshaft;
generating, by an engine control unit operatively connected to the spark plug and the servo motor, spark timing signals;
injecting, with a fuel injector, a fuel mixture in the combustion chamber;
combusting, with a spark plug located within the cylinder head and operatively connected to the combustion chamber, the fuel mixture in the combustion chamber,
receiving, by the engine control unit, an engine speed requirement;
determining, by the engine control unit, a wide-open throttle position and an intake valve closing angle based on the engine speed requirement, and
generating, by the engine control unit, variable valve timing signals;
receiving, by the servo motor, the variable valve timing signals; and
rotating, by the servo motor, the servo motor shaft in one of a clockwise direction and a counterclockwise direction based on the variable valve timing signals.