Piston and Valve Deactivation for Improved Part Load Performances of Internal Combustion Engines 2011-01-0368
Cylinder deactivation has been proposed so far for improved part load operation of large gasoline engines. In all this application, the cylinder deactivation has been achieved keeping the intake and exhaust valves closed for a particular cylinder, with pistons still following their strokes. The paper presents a new mechanism between the piston and the crankshaft to enable selective deactivation of pistons, therefore decoupling the motion of the piston from the rotation of the crankshaft. The reduced friction mean effective pressure of the new technology enables the use of piston deactivation in large engines not necessarily throttle controlled but also controlled by quantity of fuel injected. Results of performance simulations are proposed for a HSDI V8 engine, producing significant savings during light operation.
Citation: Boretti, A. and Scalco, J., "Piston and Valve Deactivation for Improved Part Load Performances of Internal Combustion Engines," SAE Technical Paper 2011-01-0368, 2011, https://doi.org/10.4271/2011-01-0368. Download Citation
Author(s):
Alberto Boretti, Joseph Scalco
Affiliated:
School of Science & Engineering, Univ. of Ballarat, Scalzo Automotive Research, Ltd.
Pages: 16
Event:
SAE 2011 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Pistons
Engine cylinders
Combustion and combustion processes
Throttles
Crankshafts
Exhaust valves
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