Development of Hydraulic- Controlled Variable Valve Lift System for Scooter Engine

Wun, Guo-Rong; Chuang, Cheng-Tse; Syu, Yong-Fu; Wang, Chia-Sheng; Wu, Yuh‐Yih

doi:10.4271/2016-32-0095

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…Therefore, with this setup, there is no possible way that the valves can work dynamically according to the variation of the operational conditions. Dynamically controlled valves such as those used in automotive industries, i.e., the variable valve timings (VVT) [11][12][13], continuous variable valve lift (CVVL) [13][14][15], intelligent valve actuation (IVA) [16][17][18], camless or free-valve technology [19][20][21], and other state-of-the-art valve technologies are among the best choice to be adopted as valves for the expander. However, these valve technologies are extremely complicated to be developed.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study on the conversion of a small engine into a single-piston expander operating under different pressure and valve timing conditions

Mohamad

Salim

Muhammad

2022

J. Phys.: Conf. Ser.

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There are limited studies on improving the piston expander performance for a wider operating range by adopting the variable valve timing method. This study uses a simple conversion technique to develop a single-piston expander (SPE) from a small two-stroke engine. The SPE is being tested at different operating conditions to study the feasibility of the SPE operating under different intake pressure and valve timing conditions. By fixing the exhaust valve timing, the SPE was tested at four intake pressure; 3, 4, 5, and 6 bar, while the intake valve closing varied from 30° to 110°. From the study, the highest power produced by the SPE was only 64 Watt when tested at 6 bar, with the intake valve opening at TDC and closed at 70°. The results show that the converted SPE is feasible in terms of functionality, but it is not performance-wise because much power has been lost through the recompression process. The study also observed that the intake valve timing could significantly affect the SPE power output, besides the intake pressure alone.

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Section: Introductionmentioning

confidence: 99%

Feasibility study on the conversion of a small engine into a single-piston expander operating under different pressure and valve timing conditions

Mohamad

Salim

Muhammad

2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

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Comparative study on the pumping losses between continuous variable valve lift (CVVL) engine and variable valve timing (VVT) engine

Liu

et al. 2018

Applied Thermal Engineering

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The Effectiveness of Using Variations in Fuel Against Engine Performance 4 Steps 100 CC with Compression Ratio 8:1

Hidayatullah

Susila

Arsana

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The compression ratio is one of the benchmarks in determining the appropriate fuel RON for motorized vehicles. The use of RON that is not following the manufacturer’s specifications can undoubtedly hurt engine performance. The purpose of this study was to analyze the effect of premium, pertalite, Pertamax, and Pertamax turbo fuels on engine performance. This research is experimental research where the object of study used is the Honda Supra X 100cc. The research instruments and equipment used included a dynamometer chassis and a blower as a cooling fan. The engine performance testing method is carried out according to the SAE J1349 standard. Meanwhile, the data analysis technique used descriptive methods. From the results of data analysis obtained from the study, it is concluded that the RON 88 is suitable for 3000-4000 rpm, while RON 90.92.95 is suitable for 4500-7000 rpm, in addition to motors that have a compression ratio of 8:1 they can use RON 90.92.95 without modification to the engine.

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Development of Hydraulic- Controlled Variable Valve Lift System for Scooter Engine

Cited by 4 publications

References 13 publications

Feasibility study on the conversion of a small engine into a single-piston expander operating under different pressure and valve timing conditions

Feasibility study on the conversion of a small engine into a single-piston expander operating under different pressure and valve timing conditions

Comparative study on the pumping losses between continuous variable valve lift (CVVL) engine and variable valve timing (VVT) engine

The Effectiveness of Using Variations in Fuel Against Engine Performance 4 Steps 100 CC with Compression Ratio 8:1

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