Browse Publications Technical Papers 2013-01-0258

Advanced GDI Injector Control with Extended Dynamic Range 2013-01-0258

Considering the world-wide market for GDI engines, the introduction of tighter polluting emission legislation, additional costs, vehicle fuel economy and pollutants reduction become substantial drivers. Focusing on particulate reduction, direct injection gasoline engines require advanced combustion strategies. The main levers used are injection splitting in order to reduce wall impingement (due to lower penetration) and higher rail pressure level to reduce droplet size. To reach this target it is necessary to improve precision in term of injected quantity in the small quantity region with high fuel rail pressure and during the actuation of multiple injections. As a consequence of the requirements of high quantities at full load, known GDI solenoid injectors show an unacceptable spread in terms of small injected quantity when the energizing time is small such that the injector works in the ballistic zone. Following these premises an electronic approach is needed. New hardware and software solutions should be integrated into the ECU in order to match the new injectors performance requirements. This paper presents two different strategies developed by Magneti Marelli: the first one is based on rail pressure measurement, the second one is based on injector electric signal analysis. Results in terms of correction of injected quantity using Magneti Marelli solenoid injectors are presented. The developed strategies demonstrate the possibility to work with multiple small injections at high pressure without changing injector hardware.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Bus Hybridization Effects in the Urban Area of Rome


View Details


Research and Development of Microwave Plasma Combustion Engine (Part I: Concept of Plasma Combustion and Plasma Generation Technique)


View Details


Diesel Particulate Emission Control without Engine Modifications-A Cost-Effective Fuel Supplement


View Details