Inventor
HEDLUND DARREN J
US21 patents
Patents
21 patentsUS9809195B2Nov 7, 2017
Snowmobile
POLARIS INC42 citations96
US9845004B2Dec 19, 2017
Snowmobile
POLARIS INC50 citations92
US11131235B2Sep 28, 2021
System and method for bypassing a turbocharger of a two stroke engine
POLARIS INC12 citations84
US7089892B1Aug 15, 2006
Fuel injection system and method for two-cycle engines
POLARIS INC11 citations83
US11725599B2Aug 15, 2023
System and method for controlling operation of a two-stroke engine having a turbocharger
POLARIS INC3 citations71
US11639684B2May 2, 2023
Exhaust gas bypass valve control for a turbocharger for a two-stroke engine
POLARIS INC2 citations71
US11384697B2Jul 12, 2022
System and method for controlling operation of a two-stroke engine having a turbocharger
POLARIS INC2 citations71
US11352935B2Jun 7, 2022
Exhaust system for a vehicle
POLARIS INC2 citations71
US10731620B2Aug 4, 2020
Battery key, starter and improved crank
POLARIS INC2 citations71
US11434834B2Sep 6, 2022
Turbocharger system for a two-stroke engine having selectable boost modes
POLARIS INC1 citations69
US11725573B2Aug 15, 2023
Two-passage exhaust system for an engine
POLARIS INC3 citations66
US11041429B2Jun 22, 2021
Cooling jacket for exhaust valve and thermostat and cooling bottle
POLARIS INC0 citations62
US12071857B2Aug 27, 2024
Turbocharger lubrication system for a two-stroke engine
POLARIS INC1 citations60
US11828239B2Nov 28, 2023
Method and system for controlling a turbocharged two stroke engine based on boost error
POLARIS INC1 citations59
US11781494B2Oct 10, 2023
Turbocharger system for a two-stroke engine having selectable boost modes
POLARIS INC1 citations59
US11788432B2Oct 17, 2023
Turbocharger lubrication system for a two-stroke engine
POLARIS INC1 citations57
US12460597B2Nov 4, 2025
Location-based modification of two-stroke engine calibration
POLARIS INC0 citations55
US10590833B2Mar 17, 2020
Cooling jacket for exhaust valve and thermostat and cooling bottle
POLARIS INC0 citations51
US11280258B2Mar 22, 2022
Exhaust gas bypass valve system for a turbocharged engine
POLARIS INC0 citations49
US11236668B2Feb 1, 2022
Method and system for controlling pressure in a tuned pipe of a two stroke engine
POLARIS INC0 citations49
US10648399B2May 12, 2020
Exhaust-tuning port and timing and combustion chamber shape
POLARIS INC0 citations39