A Comparative Study on Influence of EIVC and LIVC on Fuel Economy of a TGDI Engine Part II: Influences of Intake Event and Intake Valve Closing Timing on the Cylinder Charge Motion

2017 ◽  
Author(s):  
Xuwei Luo ◽  
Ho Teng ◽  
Yuxing Lin ◽  
Bin Li ◽  
Xiaochun Zeng ◽  
...  
Keyword(s):  
Comparative Study ◽  
Fuel Economy ◽  
Intake Valve ◽  
Charge Motion ◽  
Engine Part

scholarly journals Analisis Perbandingan Kekerasan Beberapa Merk Katup Sepeda Motor Matic

2020 ◽  
Vol 1 (2) ◽  
pp. 75-84
Author(s):  
Arif Rahmat Ali ◽  
Hasan Maksum ◽  
Donny Fernandez
Keyword(s):  
Comparative Study ◽  
Exhaust Valve ◽  
Intake Valve

This article discusses a comparison of the hardness of several valve brands for automatic motorbikes. This research used comparative study method. The motorbike used was the Honda VARIO 110 cc motorcycle. Meanwhile, the valves used and compared are Honda Genuine Parts and several brands of aftermarket valves. The results showed that the hardest intake valve head was the Genuine Valve with 61.7 HRA and the hardest exhaust valve head was the NPP with 58.9 HRA. Artikel ini membahas mengenai perbandingan kekerasan beberapa merek katup untuk sepeda motor matic. Penelitian ini menggunakan metode penelitian komparatif. Sepeda motor yang digunakan adalah Sepeda Motor Honda VARIO 110 cc. Sementara untuk katup yang digunakan dan diperbandingkan adalah Honda Genuine Parts dan beberapa merk Katup aftermarket. Hasil penelitian menunjukkan payung katup masuk yang paling keras yaitu payung katup Original 61,7 HRA dan payung katup buang yang paling keras yaitu payung katup NPP 58,9 HRA.

Design, Development, and Evaluation of a Control Framework for an Atkinson Cycle Engine

2017 ◽  
Vol 140 (5) ◽  
Author(s):  
G. Murtaza ◽  
A. I. Bhatti ◽  
Q. Ahmed
Keyword(s):  
Fuel Economy ◽  
Gasoline Engine ◽  
Thermodynamic Cycle ◽  
Mean Value ◽  
Operating Conditions ◽  
Intake Valve ◽  
Design Development ◽  
Engine Model ◽  
Atkinson Cycle ◽  
Control Framework

The efficiency of the spark ignition (SI) engine degrades while working at part loads. It can be optimally dealt with a slightly different thermodynamic cycle termed as an Atkinson cycle. It can be implemented in the conventional SI engines by incorporating advanced mechanisms as variable valve timing (VVT) and variable compression ratio (VCR). In this research, a control framework for the Atkinson cycle engine with flexible intake valve load control strategy is designed and developed. The control framework based on the extended mean value engine model (EMVEM) of the Atkinson cycle engine is evaluated in the view of fuel economy at the medium and higher load operating conditions for the standard new European driving cycle (NEDC), federal urban driving schedule (FUDS), and federal highway driving schedule (FHDS) cycles. In this context, the authors have already proposed a control-oriented EMVEM model of the Atkinson cycle engine with variable intake valve actuation. To demonstrate the potential benefits of the VCR Atkinson cycle VVT engine, for the various driving cycles, in the presence of auxiliary loads and uncertain road loads, its EMVEM model is simulated by using a controller having similar specifications as that of the conventional gasoline engine. The simulation results point toward the significant reduction in engine part load losses and improvement in the thermal efficiency. Consequently, considerable enhancement in the fuel economy of the VCR Atkinson cycle VVT engine is achieved over conventional Otto cycle engine during the NEDC, FUDS, and FHDS cycles.

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