Abstract
The performance and combustion characteristics of a novel internal combustion engine, called the crank-rocker, have been investigated experimentally. The engine specifications are gasoline-port injection, four-stroke, spark-ignition, and single-curved cylinder. The ignition timing was initially set at 8.60 CA BTDC, 1800 rpm based on a small conventional engine. The equivalence ratio, lambda (λ) was varied at rich, stoichiometric, and lean conditions. The entire tests were performed at six different engine speeds of 1800, 2000, 2200, 2400, 2600 and 2800 rpm, with each one operating at wide open throttle. The performance data such as indicated torque, indicated power, indicated specific fuel consumption, and indicated thermal efficiency were calculated. The combustion characteristics such as cylinder pressure, mass fraction burned, heat release rate, P-V diagram, and indicated mean effective pressure were also determined. The results obtained from the crank-rocker engine were compared with the experimental results obtained from the conventional engine (benchmark engine). The results showed that the indicated torque, power and thermal efficiency of crank-rocker engine is higher than normal slidercrank engine. The indicated torque and power increased by about 6.28 %, while the indicated specific fuel consumption is lower by 4.69 %. In general, the engine has similar indicated performance characteristics to the conventional engine, but the combustion characteristics differ because the peak values of the combustion pressure and heat release occur at higher crank angle ATDC. This was found to be due to the dwelling of piston at TDC. The combustion rate and mixture of the novel crank-rocker engine burned faster, resulting in shorter combustion duration and ignition delay period than the conventional slider-crank engine.
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References
A. C. Alkidas, Combustion advancements in gasoline engines, Energy Conversion and Management, 48 (11) (2007) 2751–2761.
C. Stan and S. Taeubert, Analysis of engine performances improvement by downsizing in relationship with super-and turbocharging, adapted scavenging and direct injection, SAE Technical Paper 2009-24-0075 (2009) DOI: 10.4271/2009-24-0075.
T. Lake, J. Stokes, R. Murphy, R. Osborne and A. Schamel, Turbocharging concepts for downsized di gasoline engines, SAE Technical Paper 2004-01-0036 (2004) DOI: 10.4271/2004-01-0036.
C. E. Weaver, Advanced gasoline turbocharged direct injection (gtdi) engine development, 2011 DOE Vehicle Technologies Program Review (2011).
W. Felix and H. Ernst, Rotary internal combustion engine, United States Patent 2,988,065, Issued Jun 13 (1961).
J. P. Norbye, The Wankel engine: Design, development, applications, Philadelphia: Chilton Book Co. (1971).
P. E. Jenkins, Compounded turbocharged rotary internal combustion engine fueled with natural gas, United States Patent 5,056,315, Issued Oct. 15 (1991).
D. Sherman, The rotary club, Automobile Magazine, February 2008 76–79.
F. Beck, Rotary explosion-motor, United State Patent 977,260, Issued Nov 29 (1910).
L. J. Wolff, Internal combustion engine, United State Patent 180,9577, Issued Jun 9 (1931).
D. Scott, Construction and operation of the bradshaw omega engine, Automotive Industries, Jan., 15 (1956) 54–55.
M. Farrell, Oscillating piston engine for helicopters, United State Patent 5,467,744, Issued Nov 21 (1995).
K. V. Hoose, Toroidal internal combustion engine, United State Patent 20,050,016,493, Issued Jan 27 (2005).
R. Morgado, Internal combustion engine and method, United State Patent 20,070,199,537, Issued Aug 30 (2007).
L. Giurca, Hybrid opposite piston engine -HOPE & Portable range extender, Powertrain Technologies (2013).
H. Hüttlin, Oscillating piston machine, United State Patent 20,080,245,345, Issued Oct 9 (2008).
E. Taurozzi, Balanced modular pendulum mechanism, United State Patent 638,2143, Issued May 3 (2002).
J. B. Heywood, Internal combustion engine fundamentals, McGraw-Hill, New York, 930 (1988).
Y. G. Guezennec and W. Hamama, Two-zone heat release analysis of combustion data and calibration of heat transfer correlation in an IC engine, SAE Technical Paper 1999-01-0218 (1999) DOI: 10.4271/1999-01-0218.
C. R. Ferguson and A. T. Kirkpatrick, Internal combustion engines: Applied thermosciences, John Wiley & Sons (2015).
V. H. Rapp et al., Extending lean operating limit and reducing emissions of methane spark-ignited engines using a microwave-assisted spark plug, J. of Combustion 2012 1–8, DIO: 10.1155/2012/927081.
J. Holman, Experimental methods for engineers, 7th ed., New York: McGraw-Hill (2001).
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Salah E. Mohammed received his M.Sc. in Mechanical Engineering, M.Sc. in Automotive from Univesiti Teknologi PETRONAS in 2011. Currently, he is working on Design, Development and Analysis of an Experimental Model Single Curved-Cylinder Novel Engine and pursing his Ph.D. degree in Mechanical Engineering (Automotive) at the Univesiti Teknologi PETRONAS, Malaysia, under the advisement of AP. Ir. Dr. Masri Baharom and Prof. Dr. A. Rashid A. Aziz. He has 5 Research Papers published in National and International journals.
M. B. Baharom received his M.Sc. in (Eng) Automotive Engineering, University of Leeds, United Kingdom (1999- 2000). Ph.D. (Vehicle Dynamics), University of Bradford, Bradford, United Kingdom (2005-2008). He is an Associate Professor of Mechanical Engineering Department at Univesiti Teknologi PETRONAS, Malaysia. His research interests include vehicle and chassis design, vehicle dynamics, hybrid vehicles, powertrain, crash worthiness, I. C. engine, novel egine design and development (The crank-rocker engine).
A. Rashid A. Aziz is a Professor and Head of CAREM (Center for Automotive Research and Electronic Mobility) at Univesiti Teknologi PETRONAS, Malaysia. He received his M.Sc. in Mechanical Engineering, Univ. of Miami, Florida, USA - December 1990 and Ph.D. in Mechanical Engineering, Univ. of Miami, Florida, USA - August 1995. His research interests include iternal combustion engine, combustion and laser diagnostics, flow visualization, computational fluid dynamics, hybrid powertrain.
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Mohammed, S.E., Baharom, M.B. & Aziz, A.R.A. Performance and combustion characteristics of a novel crank-rocker engine. J Mech Sci Technol 31, 3563–3571 (2017). https://doi.org/10.1007/s12206-017-0643-x
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DOI: https://doi.org/10.1007/s12206-017-0643-x