Analysis of performances of a dual-fuel turbocharged compression ignition engine

• Autorzy: Różycki A.
• Języki publikacji: EN

Abstrakty

EN

The paper describes research work on a full-scale dual-fuel 4-cylinder turbocharged compression ignition engine. Compressed natural gas (CNG) was applied as the main fuel. Selfignition of the air-fuel mixture was initiated from a diesel oil dose injected by a common rail system. The research was aimed to establish maximum CNG share in the mixture delivered into the cylinder. An excessive CNG share may result in "hard" engine operation. It may also lead to the occurrence of vibrations of piston-crank construction parts resulting in failure of this mechanism. These vibrations may originate from knocking combustion (selfignition of the air-fuel mixture in the zone of non-combusted mixture) or vibration excitation as a result of rapid pressure rise after selfignition. Boundary values of the CNG energy share were determined by analysing parameters related to the rate of pressure rise and rate of heat release as well as the engine head vibration amplitude represented by the voltage signal generated by the knock sensor. Boundary values of the above mentioned parameters were determined on the basis of measurements done on the engine fuelled in a standard mode. These parameters were registered at operating points corresponding to the maximum power and load. Then, there were done measurements of basic engine operating parameters at dual fuelling in chosen points of the load characteristic for the engine speed at which the engine fuelled in a standard mode had maximum torque. Load characteristics were done for three various diesel oil doses (constant over the whole range of engine load). Load changes were realized by changes ofCNG energy share in the fuel charge. Analysis of combustion process parameters and engine head vibrations showed that CNG energy share may reach 60%. Maximum torque is possible to obtain at 45% CNG energy share. 15% decrease of maximum torque was obtained.

Słowa kluczowe

EN

dual fuel compression ignition engine; knock; engine head vibration amplitude; compressed natural gas (CNG); common rail

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 3
• Strony: 393--399
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Różycki A.

• Radom Technical University Institute of Maintenance of Vehicles and Machines Chrobrego Av. 45, 26-600 Radom, Poland tel: [phone],fax: [phone],

Bibliografia

• [1] Kowalewicz, A., Wojtyniak, M., Natural gas a Fuel for Dual-Fuel Automotive Engines. A Review, Archivum Combustionis, Vol. 29, No. 1-2, 2009.
• [2] Zabłocki, M., Dwupaliwowe silniki z zapłonem samoczynnym napędzane paliwem ciekłym i gazowym, Seria Nowa Technika. Zeszyt 80, WNT, Warszawa 1969.
• [3] Kowalewicz, A., Pawlak, G., Wołoszyn, R., Różycki, A., Duchniak, P., Adaptacja turbodo ładowanego silnika do dwupaliwowego zasilania gazem ziemnym i olejem napędowym, Projekt badawczy, Nr 4T12D00230.
• [4] Różycki, A., Microcomputer system for measurement of high speed parameters for IC engines, Bratislava 2001 8th EAEC Congress, paper n􀁱 SAITS 01196, Bratislava 2001.
• [5] Wajand, J. A., Silniki o zapłonie samoczynnym, WNT, Warszawa 1980.