Page 21 - BUKU PROGRAM_ iMAACs

International MAAC Symposium 2019
Politeknik Sultan Mizan Zainal Abidin, Terengganu, Malaysia. 25-26 September 2019

[ID PA1016]
Engine Performance Study On Modification Of Overstroke Crankshaft
Muhd Hasanul Isyraf Bin Mat Junoh 1, a , Ahmad Jamsani Bin Mahmud 1,b and Khairul Rijal Bin Mustafa 2,c
1 Politeknik Sultan Mizan Zainal Abidin, Dungun Terengganu, Malaysia
2 Politeknik Muadzam Shah, Pahang, Malaysia
b
a
E-mail : hasanul.isyraf@psmza.edu.my, ahmad.jamsani@psmza.edu.my, khairul.rijal@pms.edu.my
c
Abstract. In volatile global oil prices, vehicle consumers are becoming increasingly frustrated when oil
prices soar as a result of lower monthly spending, especially for low-income people. This is because
they have to spend more to buy motor oil and also to a lesser extent affect the prices of everyday goods
on the market. A study is needed to modify the engine that will save fuel consumption and also improve
the performance of the engine.In this study, four-stroke Yamaha Nouvo motorcycles engine that had
undergone modification on the crankshaft. The changes have raised this motorcycle CC from 115CC to
125CC by modification on the motorcycle stroke which originally had a stroke of 57.9 mm and was
modified to 62.9 mm which was increased by 5mm. The test run of standard engine with modification
engine to compare fuel consumptions and engine performance was conducted on. The result shows
fuel consumptions and performance of modified engine is better than standard engine. It saves oil
consumption by up to 23% and increases its speed by 20.5% and also acceleration by 42.8%.

Keywords: Crankshaft, Overstroke, Fuel Consumptions, Engine Performance

[ID PA1027]
Milimeter Wave Patch Antenna Using Thick Su8 Photoresist Technique

Basliza Bt Mohamad Noor 1, a and Dr Noor Asniza Bt Murad 2,b
1 Kolej Komuniti Paya Besar, Jalan Gambang, Gambang, Pahang, Malaysia
2 Universiti Teknolgi Malaysia, Johor Bharu, Johor, Malaysia
b
a basliza.kk@1govuc.gov.my, asniza@fke.utm.my

Abstract. Millimeter wave is defined as wave traveling at smaller than 10 mm wavelength, which
covering signal with frequency ranges from 30 GHz to 300 GHz. At these high frequencies, losses are
considered high compared to radio frequency microwave band. Thus, common patch antenna widely
used in microwave band might have different profile and complication in realization. This work is
designed and fabricated of rectangular patch antenna at 30 GHz frequency using layers of thick SU-8
photoresist technique. In this work, the antenna is designed on air substrate in order to reduce the losses
due to substrate loss. However, the design must consider limitations and how to sustain the position of
suspended structure. The performance of the antenna is being simulated using CST Software
considering the S parameters and the radiation pattern. Good impedance matching was found with the
designs. The result it shows that the antenna has better result in term of return loss and bandwidth which
is found to be -17.46 dB and >2% at frequency 30 GHz. The optimised antenna is fabricated using thick
SU-8 photoresist technique without clean room.

Keywords: Millimeter wave, antenna and Su8 Photoresist Technique.

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