Investigating the Effect of Operating Variables and Engine Lubricant Viscosity on Engine Friction- A DOE Approach

Singh, Devendra; Fieldhouse, John D.; Jain, A. K.; Tyagi, Mukti; Singal, S.K.

doi:10.4271/2011-28-0052

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…Reducing the friction force is a goal for engine designers, so the frictional power is used to evaluate the indicated power and mechanical efficiency, so the frictional power must be measured. There are several ways to calculate frictional power, including the Morse test [13,9]. Reference [14,20] illustrated that an increase in the percentage of contaminants increases the frictional power, and the increase in this power is due to the loss of the oil's properties because of the deterioration of the characteristics of the oil and, thus, its oxidation, causing the engine temperature to rise.…”

Section: Introductionmentioning

confidence: 99%

A study of the Effect of Diesel Oil Contamination with Glycol on the Performance of a Diesel Engine

Kadhim,

Hasan,

Abdul-Munaim

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The performance of a diesel engine was tested with diesel oil contaminated with glycol at the engineering workshop/Department of Agricultural Machines and Equipment / College of the Agricultural Engineering Sciences at the University of Baghdad. To investigate the impact of different concentrations of glycol on the performance of a diesel engine, an experimental water-cooled four-stroke motor was utilized, with oil containing 0, 100, and 200 parts per million (ppm). Specific fuel consumption, thermal efficiency, friction power, and exhaust gas temperature were examined as performance indicators. To compare the significance of the treatments, the study employed a full randomization design (CRD), with three replicates for each treatment at the 5% probability level. Experiment results demonstrated significant variations in the characteristics under study. For example, the highest rates of Brake-specific fuel consumption (kg/KW.h) (0.4459), frictional power (7.8837 kW), and exhaust gas temperature (173.6 0 C) were all observed at oil contamination levels of 200 ppm glycol. Meanwhile, the Brake thermal efficiency was the lowest of any measured system at only 17.5623%. Glycol oil pollution was shown to have a considerable effect on engine performance.

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Section: Introductionmentioning

confidence: 99%

A study of the Effect of Diesel Oil Contamination with Glycol on the Performance of a Diesel Engine

Kadhim,

Hasan,

Abdul-Munaim

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…During the cold start, the coolant fluid and lubricant oil are cold, therefore engines suffer higher friction and less efficient combustion resulting in higher fuel consumption and higher harmful emissions [6][7][8]. The viscosity of lubricant oil affects mechanical friction whereby at low temperature, the lubricant has high viscosity leading to increasing friction loss [9,10]. Coolant temperature needs to be high during cold start to increase engine temperature until it achieves normal operating temperature.…”

Section: Introductionmentioning

confidence: 99%

Simulation of bypass electric water pump to reduce the engine warm-up time

Jalal

Yusoff

Hasan

et al. 2021

JMES

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There are several strategies have been developed in the automotive cooling system to improve engine thermal management. Basically, these designs use controllable actuators and mechatronic components such as electric water pump, controllable thermostat, and controllable electric fan to improve engine temperature control on most operating ranges. Most of the strategies are complicated and costly. This paper introduced a different approach to improve coolant temperature warm-up during cold start. The new strategy was by promoting a higher coolant flow rate inside the engine block by just installing an electric water pump in the bypass hose. The new approach’s cold start performance was studied using GT-SUITE on a transient model, complete with finite-element of engine block design, lubrication system, components friction model, engine with combustion model and vehicle system. The proposed strategy clearly showed faster coolant temperature increase (18 seconds faster compared to the conventional cooling system). The strategy not only increase the coolant temperature faster, but also increases the oil temperature faster, lower Friction Mean Effective Pressure (FMEP), and lower fuel consumption at certain condition during the warm-up period.

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“…In the recent past a number of original equipment manufacturers (OEMs) recommended a lower viscosity grade engine lubricant to improve fuel economy of their vehicles. Effect of engine lubricant viscosity on fuel consumption was studied by many researchers and it has been reported that lower viscosity grade engine lubricants result in reduction in engine fuel consumption [1,2]. But there are some concerns associated with the use of a low viscosity grade engine lubricant in terms of wear characteristics and durability of an engine.…”

Section: Introductionmentioning

confidence: 99%

Friction Reduction Capabilities of Silicate Compounds Used in an Engine Lubricant on Worn Surfaces

Singh

Thakre

Konathala

et al. 2016

Advances in Tribology

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Effects of magnesium silicate and alumina dispersed in engine lubricant on friction, wear, and tribosurface characteristics are studied under boundary and mixed lubrication conditions. Magnesium silicate and alumina, henceforth called as friction reducing compounds (FRC), were dispersed in engine lubricant in very low concentration of 0.01% weight/volume. Four-ball wear test rig was used to assess friction coefficient and wear scar diameter of balls lubricated with and without FRC based engine lubricant. Scanning electron microscopy (SEM) equipped with Energy Dispersive X-ray (EDX) was used to analyse the tribosurface properties and elemental distributions on worn surfaces of the balls. Test results revealed that FRC based engine lubricant increases friction coefficient but marginally reduces wear scar diameter of new balls, whereas, test on the worn-out balls running on FRC based engine lubricants shows 46% reduction in friction coefficient compared to the new balls running on engine lubricants without FRC. Investigations on tribosurfaces with respect to morphology and elemental distribution showed the presence of Si and O elements in micropores of the worn surfaces of the balls, indicating role of FRC in friction coefficient reduction and antiwear properties. These FRC based engine lubricants may be used in the in-use engines.

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Investigating the Effect of Operating Variables and Engine Lubricant Viscosity on Engine Friction- A DOE Approach

Cited by 4 publications

References 7 publications

A study of the Effect of Diesel Oil Contamination with Glycol on the Performance of a Diesel Engine

A study of the Effect of Diesel Oil Contamination with Glycol on the Performance of a Diesel Engine

Simulation of bypass electric water pump to reduce the engine warm-up time

Friction Reduction Capabilities of Silicate Compounds Used in an Engine Lubricant on Worn Surfaces

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