Development of an Electronically-Controlled Natural Gas-Fueled John Deere PowerTech 8.1 L Engine 951940
Development of a state of the art, electronically controlled natural gas-fueled engine is detailed in this paper. The engine is a lean burn, turbochargedaftercooled engine controlled by a full authority electronic control system. This system controls fuel metering, spark timing, boost pressure, throttle position, and governing. The control system features closed-loop/adaptive-learn fuel control with feedback provided by a universal exhaust gas oxygen sensor. The development of the engine included development of the control system and other engine components, as well as a substantial amount of steady-state and transient control system calibration work. This effort led to a final engine calibration which provides good efficiency and transient response while meeting CARB ULEV emissions levels.
Citation: Kubesh, J., Podnar, D., Guglielmo, K., and McCaw, D., "Development of an Electronically-Controlled Natural Gas-Fueled John Deere PowerTech 8.1 L Engine," SAE Technical Paper 951940, 1995, https://doi.org/10.4271/951940. Download Citation
John T. Kubesh, Daniel J. Podnar, Kennon H. Guglielmo, Don McCaw