This content is not included in your SAE MOBILUS subscription, or you are not logged in.
VVT+Port Deactivation Application on a Small Displacement SI 4 Cylinder 16V Engine: An Effective Way to Reduce Vehicle Fuel Consumption
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 03, 2003 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
During recent years several VVT devices have been developed, in order to improve either peak power and low end torque, or part load fuel consumption of SI engines.
This paper describes an experimental activity, concerning the integration of a continuously variable cam phaser (CVCP), together with an intake port deactivation device, on a small 4 cylinder 16V engine. The target was to achieve significantly lower fuel consumption under normal driving conditions, compared to a standard MPFI application.
A single hydraulic cam phaser is used to shift both the intake and the exhaust cams to retarded positions, at constant overlap. Thus, high EGR rates in the combustion chamber and late intake valve closure (“reverse Miller cycle”) are combined, in order to reduce pumping losses at part load.
A specific port deactivation device, integrated into the intake manifold, is used to induce a swirl charge motion in the cylinder, so as to achieve good combustion stability with high EGR rate conditions.
Using a 1.4 dm3 16V engine equipped with these devices, the concept was developed on the engine test bed with respect to functionality, durability, and cost,
A demonstration car with this engine was prepared. ECU calibration was performed on the test bed and in the vehicle, with given targets for driveability and emissions. EURO 4 exhaust emission limits were considered, using a catalyst aged for 100′000 km. Fuel consumption was reduced by more than 6% in the NEDC cycle with this vehicle, compared to a standard (without any conventional EGR system) 4 cylinder 16V MPFI application.
CitationFiorenza, R., Pirelli, M., Torella, E., Pallotti, P. et al., "VVT+Port Deactivation Application on a Small Displacement SI 4 Cylinder 16V Engine: An Effective Way to Reduce Vehicle Fuel Consumption," SAE Technical Paper 2003-01-0020, 2003, https://doi.org/10.4271/2003-01-0020.
Data Sets - Support Documents
|Unnamed Dataset 1|
- Gaudino P. Mastrangelo G. Lucignano G. Sacco D. The new 16 valves, 1.2 liter Fiat FIRE engine 3 rd International Seminar “High performance Spark ignition engines for passengers cars” Como 1996
- Fraidl, G. Quissek, F. Carstensen, H. 54 1993
- Schamschulla, S. Bauder, T. Essen 1996
- Grebe, U. Kapus, P. Poetscher, P. Braunschweig 1999
- Kapus, P. Poetscher, P. ULEV and Fuel Economy - A Contradiction? SAE 2000-01 1209
- Kapus, P. Denger, D. Holland, T. Intelligent Simplification - Ways Towards Improved Fuel Economy SAE 2002-01-0236
- Suzuki, K. Maekawa, Y. Kushida, T. Major Features of the New Honda Civic SAE 4-13-3-85
- Sugimoto, C. Nishizawa, K. Fukuo, K A Valve Train for a four-valve lean burn engine, reconciling low fuel consumption and high power SAE 988482
- Mongelluzzi, L. Torella, E. Università di Napoli 2001
- Grebe, U. Prüfer, R. Hofmann, P. Fitl, M. Weissenberger, D. Internationales Wiener Motorensymposium April 2002