Influences of the Ignition Timing on CNG Engine Economical Efficiency

2021 ◽  
Author(s):  
Wenqiang Wang ◽  
Wei Sun ◽  
Shanpeng Xia
Keyword(s):  
Ignition Timing ◽  
Economical Efficiency ◽  
Cng Engine

scholarly journals Effect of ignition timing on engine characteristics of a single cylinder spark ignition engine with CNG fueled

2017 ◽  
Vol 20 (K6) ◽  
pp. 79-86
Author(s):  
Quoc Dang Tran
Keyword(s):  
Natural Gas ◽  
Thermal Efficiency ◽  
Engine Speed ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Ignition Timing ◽  
Compressed Natural Gas ◽  
Brake Thermal Efficiency ◽  
Timing System ◽  
Cng Engine

This article shows an investigated research on Compressed Natural Gas (CNG) engine with a port injection when varying ignition timing. The obtained results from simulating study have indicated that both of brake thermal efficiency and torque have a similar trend when varying ignition timing. The effect of ignition timing on the value of brake thermal efficiency is stronger in comparison with torque, however, the increase in engine speed or lambda value have to adjust the ignition timing more early. To reach the maximum break torque at each engine speed, the ignition timing should be adjusted IT = 14 - 32 bTDC, and this is also basic value to design the ignition timing system using CNG engine with port injection.

Researches on Start Control Strategy of CNG Engine

2011 ◽  
Vol 383-390 ◽  
pp. 118-124
Author(s):  
Cheng Qun Ni ◽  
You Tong Zhang
Keyword(s):  
Control Strategy ◽  
Control Mode ◽  
Injection Timing ◽  
Ignition Timing ◽  
Operating Characteristics ◽  
Electrical Control ◽  
Injection Quantity ◽  
Cng Engine ◽  
Set Up ◽  
Starting Control

With the discovery of abundant gas hydrate storage, the natural gas will become an important fuel for future vehicles. In order to improve the starting performance of the CNG engine, an electrical control system was developed and the starting control mode was set up according to the engine operating characteristics. The control parameters of injection quantity, injection timing, ignition energy and ignition timing were considered in the model. The tests of start and idle were conducted on a four stroke CNG engine. The results indicated that the CNG engine can start faster and more reliably by using the optimal start control strategy.

Research on the Combustion and Emission Characteristics of Lean Burn CNG Engine

2011 ◽  
Vol 354-355 ◽  
pp. 508-512
Author(s):  
Lei Guan ◽  
Tian You Wang ◽  
Hai Yan Zhang ◽  
Zhi Jin Zhang
Keyword(s):  
Nox Emission ◽  
Emission Characteristics ◽  
Cylinder Pressure ◽  
Ignition Timing ◽  
Lean Burn ◽  
Excess Air ◽  
Combustion Duration ◽  
Flame Development ◽  
Development Duration ◽  
Cng Engine

The study on combustion characteristics of different excess air ratios (λ) and ignition timings was conducted on a lean-burn spark-ignition CNG engine, and the corresponding emission characteristics was also analyzed. The results show that the curve of cylinder pressure moves towards TDC, and the CoVimep decreases with the advance of ignition timing. With the excess air ratio increasing, the CoVimep increases while the cylinder pressure decreases firstly, and then increases. The flame development duration increases with the ignition timing advanced, but the rapid flame duration decreases, the total combustion duration basically keep constant, and all of them increase with the increasement of excess air ratio. Best fuel economy was gotten at λ=1.2. With the excess air ratio increasing, the CO and NMHC emissions decrease, the NOx emission firstly reaches to a peak value, which is about 3000ppm at λ=1.2, and then decreases. Both of the THC and CH4 emissions have opposite trends to NOx emission. All the emissions mentioned above increases with the advance of ignition timing.

Studi eksperimental pengaruh mapping waktu pengapian dan mapping durasi injeksi serta rasio kompresi terhadap perrformansi dan emisi gas buang engine honda CB150R berbahan bakar E50

2018 ◽  
Vol 12 (2) ◽  
pp. 77
Author(s):  
Dwijo Hartono ◽  
Marthen Paloboran ◽  
Bambang Sudarmanta
Keyword(s):  
Ignition Timing

Bioetanol merupakan bahan bakar nabati yang diformulasikan untuk kendaraan bermotor. Dalam penerapan bioetanol di motor bakar, memerlukan beberapa modifikasi pada mesin yang akan dipakai seperti mengubah waktu pengapian, mengubah durasi injeksi, mengubah rasio kompresi, dan memodifikasi sistem pemasukan bahan bakar mesin. Dengan demikian, diharapkan terjadi peningkatan terhadap hasil unjuk kerja engine. Penelitian ini difokuskan pada mesin Honda CB150R dengan diawali melakukan setting pada ECU programmable. Setelah itu pengujian penginjeksian bahan bakar untuk mencapai AFR Bioetanol E50 dengan persentase penginjeksian sebesar 100, 125, 150, 175 dan 200 persen dari jumlah penginjeksian bahan bakar standar. Kemudian dilakukan pengujian dengan penggunaan Pertamax (bioetanol 0%) pada kondisi standar sebagai kelompok kontrol dan penggunaan Bioetanol E50 dengan variasi ignition timing sebagai kelompok uji dengan mengambil 4 variasi advance ignition timing 16°, 20°,24° dan 28° BTDC pada rasio kompresi yang telah dirubah menjadi 12, 12,5, dan 13. Dari penelitian ini didapatkan mapping durasi injeksi yang tepat pada putaran 2000 hingga 4000 rpm adalah 150%, sedangkan pada putaran 5000 hingga 8000 rpm, durasi terbaik 125%. Sedangkan untuk mapping waktu pengapian didapatkan pada rentang 16° dan 20° BTDC untuk rasio kompresi 12, 12,5, dan 13. Berdasarkan hasil afr E0 ecu programable pada rasio kompresi 11 didapatkan nilai rata – rata sebesar 13,154 yang berarti kondisi campuran udara dan bahan bakar berada di bawah afr stoikiometri yaitu 14,7. Sedangkan untuk hasil afr E50 ecu programable pada rasio kompresi 11 didapatkan nilai sebesar rata – rata 11,160 yang berarti kondisi campuran udara dan bahan bakar berada di bawah afr stoikiometri yaitu 12,6. Hal tersebut menunjukan bahwa engine Honda CB150R beroperasi pada afr di bawah stoikiometri dari bahan bakar yang digunakan. Sehingga engine Honda CB150R memiliki karakteristik daya menjadi meningkat dan tidak terjadi detonasi, akan tetapi nilai waktu konsumsi bahan bakar akan menurun serta emisi CO dan HC meningkat

Development of a Drill Bit for CFRP/Aluminum-Alloy Stack: To Improve Flexibility, Economical Efficiency and Work Environment

2013 ◽  
Author(s):  
Shuhei Segawa ◽  
Junich Tamura ◽  
Satoshi Suzuki ◽  
Hisao Oka ◽  
Kiichi Meguro ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Work Environment ◽  
Drill Bit ◽  
Economical Efficiency

New Approaches to Improve Economical Efficiency of Development of Gas-Condensate Reservoirs with Thin Oil Rims (Russian)

2011 ◽  
Author(s):  
Anton Yushkov ◽  
A.S. Romanov ◽  
I.R. R. Mukminov ◽  
A.E. Ignatiev ◽  
S.V. Romashkin ◽  
...  
Keyword(s):  
Gas Condensate ◽  
Economical Efficiency ◽  
Gas Condensate Reservoirs ◽  
New Approaches
Sign in / Sign up

Export Citation Format

Share Document