US 12,454,899 B1
Fuel injected independent 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. 19/248,571.
Application 19/248,571 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.
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)] 14 Claims
OG exemplary drawing
 
1. A fuel injected independent rotary valve engine, comprising:
an engine crankcase;
a crankshaft located in a bore in the engine crankcase;
a bidirectional servo motor connected to the engine crankcase;
a cylinder block connected to the engine crankcase;
a cylinder head connected to the cylinder block;
a piston located within a combustion chamber of the cylinder block;
a connecting rod attached between the piston and the crankshaft;
a fuel injector;
an intake rotary valve located within a first channel in the cylinder head, wherein the fuel injector is in fluid communication with the intake rotary valve;
an exhaust rotary valve located within a second channel in the cylinder head, wherein the second channel is parallel to the first channel;
a pulley connected to a servo motor shaft of the bidirectional servo motor and a first end of the intake rotary valve;
a spark plug operatively connected within the cylinder head; and
an engine control unit operatively connected to the spark plug and the servo motor, wherein the engine control unit is configured to:
generate spark timing signals configured to actuate the spark plug to combust a fuel mixture in the combustion chamber,
receive an engine speed requirement,
determine a wide-open throttle position and an intake valve closing angle based on the engine speed requirement, and
generate variable valve timing signals configured to rotate the servo motor shaft in one of a clockwise direction and a counterclockwise direction based on the wide-open throttle position and the intake valve closing angle.