Issued Patents 2011
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8086392 | Post oxygen sensor performance diagnostic with minimum air flow | Jeffry A. Helmick, Richard B. Jess, John W. Siekkinen, Christopher E. Whitney, Robert C. Simon, Jr. | 2011-12-27 |
| 8046150 | Engine cooling system diagnostic for applications with two coolant sensors | John W. Siekkinen, Jinhee Yu, Zhong Wang, Mikaela Waller | 2011-10-25 |
| 8014930 | System and method for determining oxygen sensor heater resistance | John W. Siekkinen, Michael John Dokter, Jens Vollstaedt, Michael Schellong, Per-Olof Blom | 2011-09-06 |
| 7937209 | Air fuel ratio control system for internal combustion engines | Kenneth P. Dudek, Sai S. V. Rajagopalan, Stephen Yurkovich, Yann G. Guezennec, Shawn W. Midlam-Mohler +1 more | 2011-05-03 |
| 7921705 | Engine coolant temperature estimation system | Wajdi B. Hamama, Jon C. Miller, John W. Siekkinen, Steven J. Shepherd, Robert S. Wickman +1 more | 2011-04-12 |
| 7900615 | Air-fuel imbalance detection based on zero-phase filtering | Zhong Wang, Lan Wang, Ian J. Mac Ewen, Steven Ward Majors, Cheol S. Lee | 2011-03-08 |
| 7900439 | Exhaust system monitoring methods and systems | Robert J. Genslak, Justin F. Adams, Jeffry A. Helmick, Edward Stuteville, Wesley W. Wald +1 more | 2011-03-08 |
| 7881859 | Torque converter clutch control system and post oxygen sensor performance diagnostic system | Douglas J. Moening, John W. Siekkinen, Jayson S. Schwalm, Daniel J. Wickman | 2011-02-01 |
| 7873464 | Block heater usage detection and coolant temperature adjustment | Samuel Bryan Shartzer, Wajdi B. Hamama, Roberto De Paula, Jaehak Jung, John W. Siekkinen | 2011-01-18 |