US 11,970,958 B1
Chain or belt drive with multiple non-prevalent order sprockets or pulleys
Kevin B Todd, Freeville, NY (US)
Assigned to BORGWARNER INC., Auburn Hills, MI (US)
Filed by BorgWarner, Inc., Auburn Hills, MI (US)
Filed on Dec. 12, 2022, as Appl. No. 18/064,779.
Int. Cl. F01L 1/46 (2006.01); F01L 1/02 (2006.01); F01L 1/053 (2006.01); F16H 7/02 (2006.01); F16H 7/06 (2006.01); F16H 57/00 (2012.01)
CPC F01L 1/46 (2013.01) [F01L 1/022 (2013.01); F01L 1/024 (2013.01); F01L 1/053 (2013.01); F16H 7/02 (2013.01); F16H 7/06 (2013.01); F16H 57/0006 (2013.01); F01L 2001/0535 (2013.01); F01L 2250/02 (2013.01); F01L 2250/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of reducing engagement noise in a chain drive or belt drive for an internal combustion engine having a crankshaft having a driving sprocket and at least one driven shaft having at least a first driven sprocket, comprising the steps of:
determining external excitations within the chain drive to determine engine cycle orders at which tensions occur;
converting engine cycle orders at which tensions are prevalent to sprocket orders;
determining sprocket orders which are non-prevalent;
determining a number of non-prevalent order sprockets for the chain drive or belt drive;
determining a unique set of non-prevalent orders to be incorporated into each of the number of non-prevalent order sprockets determined for the chain drive or belt drive, such that no non-prevalent order sprocket has the same engine cycle orders;
incorporating a unique set of at least one non-prevalent order into a radial variation pattern of a sprocket for each of the non-prevalent order sprockets; and
installing the non-prevalent order sprockets in the chain drive or belt drive of the internal combustion engine.