Simulation and experimental research on the influence of lubrication on the comprehensive friction of TGDI engine

Hong, Ye; Yi-min, MO; Wang, Jun; Kong, Xiangkui; Liu, Qingchun

doi:10.1108/ilt-12-2021-0472

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…It allowed users to design the craft form or pattern they want in real-time with the synergy of virtual reality technology and augmented reality technology, which greatly increases the practicality and convenience of this model. Virtual reality technology includes various technologies such as computer graphics, simulation, computer networks, interactive design, artificial intelligence, multimedia, and sensing technology [27][28][29][30]. The user interacts naturally with the computer through a combination of user interface and sensors, thus enabling the user to gain a sense of immersion and fully integrate into the created virtual world, as shown in Figure 2.…”

Section: Figure 1 Arts and Crafts Virtual Design Modelmentioning

confidence: 99%

Research and practice on the application of computer virtual technology in arts and crafts nowadays

Huang,

Jiang

2023

Applied Mathematics and Nonlinear Sciences

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With the gradual maturation of virtual computer technology, it is increasingly used in real life to represent its effects realistically. The connection between arts and crafts and digital technology is getting closer. To bring new opportunities to the development of arts and crafts, virtual reality technology and augmented reality technology is integrated to establish a 3D arts and crafts virtual design model with visualized interactive arts and crafts design as the core. In the visualized virtual scene with the support of a craft knowledge base, the coordinates of virtual design tools, original objects inside the tools, and other points are derived according to the pick-up points. By repeating “delete current scene - generate new scene”, the design of arts and crafts is realized. After the verification of properties, performance, and satisfaction, the process error of the virtual design model is only 1.57mm, the average design cycle is 5.91 hours, and the labor cost, pre-preparation cost, and design cost are 214.66 RMB, 100 RMB, and 20 RMB respectively, which are significantly lower than the traditional design mode. Furthermore, the average scoring value of designers for different forms of arts and crafts is greater than 8 points, which is more satisfying with the application effect of the model. The model is connected to design practice with the help of virtual technology, which not only improves work efficiency and saves material and labor consumption but also facilitates the optimization of design solutions and the extension of solution serialization.

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Section: Figure 1 Arts and Crafts Virtual Design Modelmentioning

confidence: 99%

Research and practice on the application of computer virtual technology in arts and crafts nowadays

Huang,

Jiang

2023

Applied Mathematics and Nonlinear Sciences

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“…It was found that the weight of the hollow shaft was reduced by 29.7% at variable speeds of 5000-10000 r/min. The literature [27] simulated and analyzed the effect of low-viscosity and ultra-low-viscosity engine oils on the integrated friction of turbocharged gasoline direct injection and developed a numerical analysis model of the friction loss of reciprocating crankshafts for testing the external and general characteristics during engine speed change. An adaptive control method based on an adaptive neural network inverse system and a two-degree-of-freedom internal model controller was proposed in the literature [28].…”

Section: Introductionmentioning

confidence: 99%

Design of a mechanical automatic transmission system for automobiles based on torsional vibration damping

Liu

2023

Applied Mathematics and Nonlinear Sciences

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In order to reduce the vibration damage of the engine and improve the automatic transmission adjustment performance of the automobile, an automatic transmission system based on torsional damping is constructed in this paper to optimize the hardware function of the shift speed. The torsional damper is used as the core control element to reciprocate the automotive mechanical automatic transmission system, and the calculation method of torsional vibration analysis of the crankshaft shaft system is used to determine the indexes of rotational inertia, stiffness, and damping parameters of torsional vibration. The damping coefficient values are set near the equilibrium point, and the loss factor of the automatic transmission system is signal processed to obtain the best damping effect. Using the intrinsic frequency as the central processing unit of the automatic transmission system, the differential equation is used to calculate the excitation torque vector of each cylinder of the engine, and the characteristic module of the automatic transmission system is developed. The tests showed that the cylinder burst pressure of the automatic transmission system with the torsional damper reached a maximum of 67.9 pressure at 4800 amp. The crankshaft front-end torsional angle of the 4th-order main harmonic excitation reached a maximum of 0.57 degrees, which exceeded the engineering allowance of 0.2 degrees and reduced the automatic shift shock by about 28.36%. It indicates that the torsional damper can improve the control performance of the automatic transmission system, which is conducive to enhancing the stability and self-adaptive capability of the transmission adjustment.

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Performance evaluation of nano-graphene lubricating oil with high dispersion and low viscosity used in diesel engines

Kuang,

Yang,

Bian

et al. 2024

PLoS ONE

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The basic tribological experiments have reported that nano-graphene lubricating oil has excellent anti-friction and anti-wear properties, which has been widely concerned. However, the real anti-friction effect of nano-graphene lubricating oil and its impact on engine power performance, economic performance and emission performance remain to be proved. This has seriously hindered the popularization and application of nano-graphene lubricating oil in the engine field. In this paper, nano-graphene powder was chemically grafted to prepare nano-graphene lubricating oil with high dispersion stability. The influence of nano-graphene on physicochemical properties of lubricating oil was studied, and the influence of nano-graphene on engine power performance, economic performance and emission performance was explored. The results show that after modification, the dispersion of nano-graphene in lubricating oil is improved. Compared with pure lubricating oil, the addition of nano-graphene makes the kinematic viscosity of lubricating oil slightly lower, and has little effect on the density, flash point, pour point and total acid value of lubricating oil. The reversed towing torque of nano-graphene lubricating oil is reduced by 1.82–5.53%, indicating that the friction loss decreases. The specific fuel consumption of the engine is reduced, which indicates that the fuel economic performance is improved. Engine HC+NOX, CH4, CO2 emissions do not change much, but particulate matter (PM) emissions increase by 8.85%. The quantity concentration of nuclear particles, accumulated particles and total particles of nano-graphene lubricating oil are significantly higher than that of pure lubricating oil. And the increase of the quantity concentration of accumulated particles is more obvious than that of nuclear particles, and the larger the load, the more obvious this phenomenon. In order to apply nano-graphene lubricating oil to the engine, it is also necessary to further study its impact on the post-processing system, adjust the control strategy of the post-processing system and then test and calibrate.

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Simulation and experimental research on the influence of lubrication on the comprehensive friction of TGDI engine

Cited by 3 publications

References 13 publications

Research and practice on the application of computer virtual technology in arts and crafts nowadays

Research and practice on the application of computer virtual technology in arts and crafts nowadays

Design of a mechanical automatic transmission system for automobiles based on torsional vibration damping

Performance evaluation of nano-graphene lubricating oil with high dispersion and low viscosity used in diesel engines

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