Inventor

HERRIN RONALD J

US8 patents

⚠️ This page may combine multiple inventors who share the name “HERRIN RONALD J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GEN MOTORS CORP

4 patents

US4054109AOct 18, 1977

Engine with variable valve overlap

GEN MOTORS CORP53 citations91

US6843214B1Jan 18, 2005

Method for balancing engine cylinder bank output using crankshaft sensing and intake cam phasing

GEN MOTORS CORP21 citations90

US6837231B1Jan 4, 2005

Cylinder bank work output balancing based on exhaust gas A/F ratio

GEN MOTORS CORP20 citations90

US4223648ASep 23, 1980

Hydraulic valve lifter

GEN MOTORS CORP14 citations72

GM GLOBAL TECH OPERATIONS LLC

2 patents

US9759177B2Sep 12, 2017

System and method for controlling spark timing based on a duration of a fuel burn within a cylinder in an engine

GM GLOBAL TECH OPERATIONS LLC0 citations47

US9759140B2Sep 12, 2017

Fifty percent burn crankshaft angle estimation systems and methods

GM GLOBAL TECH OPERATIONS LLC1 citations47

MORGAN JEFFREY A

1 patent

US8532908B2Sep 10, 2013

System and method for estimating indicated mean effective pressure of cylinders in an engine

MORGAN JEFFREY A11 citations80

GM GLOBAL TECH OPERATIONS INC

1 patent

US7530337B1May 12, 2009

High overlap camshaft for improved engine efficiency

GM GLOBAL TECH OPERATIONS INC0 citations39