Total efficiency of adjustable compression ratio SI engine

• Autorzy: Sendyka B. , Kula K. , Kudzia S. , Soczowka J.
• Języki publikacji: EN

Abstrakty

EN

The following paper includes adjustable ratio spark ignition engine's total efficiency analysis. Main modification of the engine is mounting of crankshaft on eccentric mechanism. Paper presents schemes of eccentric mechanism implemented in developed engine as well as adjustable compression ratio control system's block diagram. Propulsion from stepper motor is transmitted through self-locking worm gear. Value of compression ratio varies from 9.5 to 14. The main input signal for electronic control system is coming from knock-sensor mounted on the engine. If control system doesn't receive that signal it levels up compression ratio. As soon as signal appears ratio mentioned above is reduced by a value 0.05. During the investigation rotational speed of the engine was limited to nterval 1800-4000 [rpm] and throttle was partially closed. Relative increase of Suzuki engine's total efficiency presented in this paper surpasses 30 per cent. The outcome of investigation presents engine with variable compression ratio as a good prospect for the future. Constant adjustment of compression ratio with use of electronical control system allows significant improvement of total efficiency and consequently reducing fuel consumption.

Słowa kluczowe

EN

SI engine; compression ratio; combustion engines; total efficiency

• 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: 2007
• Tom: Vol. 14, No. 4
• Strony: 401--407
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Sendyka B.

autor

Kula K.

autor

Kudzia S.

autor

Soczowka J.

• Section of Special Engines Faculty of Mechanical Engineering Cracow University of Technology Al. Jana Pawła II37, 31-864 Kraków, Poland

Bibliografia

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