This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Design and Benefits of Dynamic Skip Fire Strategies for Cylinder Deactivated Engines
Abstract:
Cylinder deactivation is a fuel consumption reduction technology for throttled internal combustion engines and other engines with thermal efficiency loss at part cylinder load. Recent production implementations, deactivating fixed sets of cylinders under part-load operating conditions, have had limited “fly zones” due to issues with drivability and noise, vibration and harshness (NVH). Dynamic skip firing, which in its ultimate form incorporates anytime, any-cylinder deactivation, continuously varies the number of firing cylinders, along with cylinder load, obtaining flexible control of acoustic and vibrational excitations from the engine, and allowing an expanded operational envelope with fewer drive ability/NVH issues. This paper outlines design considerations of dynamic skip fire operational strategies, discusses implementation of the system on a vehicle, and presents benefits to fuel economy and NVH.
Recommended Content
| Journal Article | Integration of Engine Start/Stop Systems with Emphasis on NVH and Launch Behavior |
| Technical Paper | COMBUSTION NOISE AND VIBRATION |
| Technical Paper | Powertrain Noise & Sound Quality Refinement for New Generation Common Rail Engines |