A Simulation of the Effect of Iraqi Diesel Fuel Cetane Number  on the Performance of a Compression Ignition Engine

Allawi, Mohammed Kadhim; Mejbel, Mohanad Kadhim; Younis, Younis M.; Mezher, Sabah J.

doi:10.15866/ireme.v14i3.18137

Cited by 10 publications

(13 citation statements)

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“…The volumetric efficiency ranges from 66% to 90% at different engine speeds. Case 1 shows the highest volumetric efficiency of approximately 82% under the green colour zone contour due to a good engine breathing with a minimum air-fuel loss given a slight overlap time between the inlet and exhaust valves [11]. Case 2 with more overlap time causes the volumetric efficiency to be slightly less than that in case 1 with a volumetric efficiency of 80% and the same value in case 3 due to air-fuel loss.…”

Section: Bsfc Profilesmentioning

confidence: 92%

“…All cases reveal a decrease in gas flow at 1800 rpm, and the decrease in cases 3 and 4 was more evident because of their higher valve overlapping time, in addition to the interrupted engine breathing at crank angle 405°. Thus, the BTE is evidently decreased, volumetric efficiency is reduced, the BSFC is increased, and the inlet valve gas flow is decreased at 1800 rpm [11]. Case 1 reveals the highest gas flow amount that enters the inlet valve amongst other cases at all engine speeds.…”

Section: Valve Timing Influence On Brake Thermal Efficiencymentioning

confidence: 93%

“…To build up a suitable control strategy for the engine control system, prediction and optimisation via modelling and computer simulations using commercial well-known software packages is the optimum solution [11]. Without the requirement for difficult and long experiments on an actual engine bed, these simulations are inexpensive and flexible in developing the control algorithms.…”

Section: Introductionmentioning

confidence: 99%

“…Without the requirement for difficult and long experiments on an actual engine bed, these simulations are inexpensive and flexible in developing the control algorithms. Optimising and solving engineering operational troubles in accordance with the design layouts of the internal combustion engines (ICEs) is conducted using various developed commercial packages currently available in the market [11].…”

Section: Introductionmentioning

confidence: 99%

“…These packages have identical functionality and purposes. LESoft is developed as an in-house coded package by Lotus engineering; it is used by several researchers for the last decade [11]. Basaran and Ozsoysal in 2017 [12] utilised Lotus engine simulation to model a six-cylinder, intercooled and turbocharged diesel engine.…”

Section: Introductionmentioning

confidence: 99%

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Variable Valve Timing (VVT) Modelling by Lotus Engine Simulation Software

Allawi

Mejbel

Oudah

2021

IJAME

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Variable valve timing (VVT) is an advanced modern technique applied in internal combustion engines by altering the valve lift event timing. This work aims to contribute to the continuing industrial VVT development to improve engine efficiency, fuel consumption and performance. To observe the influence on the spark-ignition (SI) engine’s performance, four valve timing strategies are selected carefully by varying the intake and exhaust valve timing. Lotus Engine Simulation, a simulation engineering software, is adapted in this study. The engine characteristics used in this modelling are spark engine, multicylinder, four strokes, port injection fuel system and constant compression ratio. A comparison between a conventional standard exhaust/intake valve timing and three other different timing cases is carried out. Results reveal that the overlap case of 98° showed a good brake-specific fuel consumption by approximately 3% less than the conventional case. An improvement of 6.2% for volume efficiency and 2.9% in brake thermal efficiency is also reported.

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Section: Bsfc Profilesmentioning

confidence: 92%

Section: Valve Timing Influence On Brake Thermal Efficiencymentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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