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Parameter optimization during minimum quantity lubrication turning of Inconel 625 alloy with CUO, Al2O3 and CNT Nanoparticles dispersed vegetable-oil-based cutting fluid

Vellore Institute of Technology-Venkatesan Kannan, Devendiran Sundararajan
  • Technical Paper
  • 2019-28-0061
To be published on 2019-10-11 by SAE International in United States
Inconel 625, nickel based alloy, is found in gas turbine blades, seals, rings, shafts, and turbine disks. Application of Minimum Quantity Lubrication (MQL) in turning process provides as an advanced and green machining concept. The addition of nanoparticle of weight percentage parameters along with machining parameters has a significant influence on the machining characteristics and so, parameter optimization is vital role to obtain the best machining performance. In this study, MQL with CUO, Al2O3 and CNT nanoparticles dispersed vegetable-oil-based cutting fluid is prepared in turning of Inconel 625. The nanofluids are prepared by dispersing 0.1, 0.25, and 0.5 wt% into vegetable oil-based nanofluids to improve the machining characteristics of the Inconel 625. Then Taguchi-Desirability analysis optimization method is used to evaluate the effect of MQL+ machining parameters on the turning characteristic and determine the optimal conditions combination. Results reveals that both surface roughness, Ra and tool wear Vba found to lower value at the optimized cutting parameters of 0.5 (wt%) concentration, velocity 40 m/min and feed rate 0.14 mm/rev and in this case, it is…
 

Function Of Taguchi Grey Relation Analysis for Influencing the Process Parameter for Getting Better Product Quality and Minimize the Industrial Pollution by Coolants in Turning of Ti–6Al–4V Alloy

SRM Institute Of Science And Technology-Sundar Singh Sivam Sundarlingam Paramasivam, Durai Kumaran, Krishnaswamy Saravanan, Raj Rajendran, Harish Sriram
Tishk International University-Ganesh Babu Loganathan
  • Technical Paper
  • 2019-28-0065
To be published on 2019-10-11 by SAE International in United States
Cutting liquids are important for cutting titanium. In spite of the fact that ventures are discovering routes that to cut titanium dry, the properties of this material reason imperative deterrents for doing this. It is sticky, has low Thermal conductivity, and highlights a low flash point. Thus, the chips don't divert the warmth, and the work will get sufficiently hot to touch off and consume. Cutting Fluids thwart the issue by greasing up the sting, flushing the chips away and cooling the work piece. To guarantee that the cutting liquid plays out these capacities well, titanium combinations lean toward cutting liquids conveyed at a high weight, generally inside the scope of 4,000 psi. to 7,000 psi. This thinks about reports the aftereffects of a Turning test led on the Ti- 6Al- 4V compound of the symmetrical exhibit with Grey relational analysis by Taguchi Method. Spotlights on the improvement of Turning process parameters utilizing the system to get least surface Roughness (Ra), Maximum MRR, Min Tool Wear and Thrust Force with Minimum Industrial pollutants like coolant.…
 

Knock Mitigation by Means of Coolant Control

Università della Calabria-Diego Perrone, Luigi Falbo, Teresa Castiglione, Sergio Bova
  • Technical Paper
  • 2019-24-0183
To be published on 2019-09-09 by SAE International in United States
The potentiality of knock mitigation by means of the control of the coolant flow rate is investigated. As a first step, the dynamic behavior of the wall temperature in response to a sudden variation of the coolant flow rate is analyzed experimentally in a small displacement, 4-valve per cylinder SI engine, which is equipped with an electrically driven pump. Subsequently, the influence of the wall temperature on knock onset is analyzed through a zero-dimensional model and the Livengood and Wu integral. Finally, an experimental activity on the engine test bed is carried-out in order to evaluate the influence of the coolant flow rate and of the engine inlet coolant temperature on the knock phenomenon. Results show that, even though a retarded spark advance and a mixture enrichment are not avoidable in the early stage of knock onset, a cooling control can help reducing the time of use of these fuel consuming strategies in the case of prolonged high-load conditions.
 

Validity of a Steady-State Friction Model for Determining CO2 Emissions in Transient Driving Cycles

IVK, University of Stuttgart-Michael Bargende
MAHLE International GmbH-Tobias Funk, Holger Ehnis, Reiner Kuenzel
  • Technical Paper
  • 2019-24-0054
To be published on 2019-09-09 by SAE International in United States
Due to its high benefit-cost ratio, decreasing mechanical friction losses in internal combustion engines represents one of the most effective and widely applicable solutions for improved engine efficiency. Especially the piston group – consisting of piston, rings and pin – shows significant potential for friction reduction, which can be evaluated through extensive experimental parameter studies. For each investigated variant, the steady-state friction measurements are fitted to an empirical polynomial model. In order to calculate the associated fuel consumption and CO2 emissions in transient driving cycles, the steady-state friction model is used in a map-based vehicle simulation. If transient engine operation entails friction phenomena that are not included in the steady-state model, the simulation could yield erroneous fuel consumption and CO2 predictions. This issue is gaining in importance with the current regulatory driving cycles, which aim to better reflect real-world driving conditions and thus contain more frequent and steep transient events. Therefore, the purpose of this study is to assess the extent to which it is valid to use a steady-state friction model for the determination…
 

Efficient Test Bench Operation with Early Damage Detection Systems

BEA Testing GmbH-Matthias Pouch, Carsten Küpper
RWTH Aachen University-Thomas Laible, Stefan Pischinger
  • Technical Paper
  • 2019-24-0192
To be published on 2019-09-09 by SAE International in United States
The efficient operation of test benches within the framework of research and development projects directly correlates with the "health" of the examinee to be investigated. The use of so-called Early Damage Detection Systems (EDDS) is becoming increasingly popular for reasons of Unit Under Test (UUT) monitoring. In the context of this publication the expectations of an EDDS and its structure are discussed as well as its advantages and disadvantages in test bench operation analyzed and compared with the results of measurements. The used EDDS should primarily prevent the damage, up to the loss of the test object by a total loss, in order to ensure a finding possibility of the damaged part at the examined test object. A deviation of the test object behavior from the undamaged condition must be recognized in an early status and must lead to a shutdown of the test bench operation after reaching a defined limit value. With the sensors mounted on the test object it must be able to isolate the cause of the damage in the event of…
 

Hybrid Powertrain Technology Assessment Through an Integrated Simulation Approach

Continental-Naroa Zaldua-Moreno, Lorenzo Pace
Ford Werke GmbH-Harald Stoffels
  • Technical Paper
  • 2019-24-0198
To be published on 2019-09-09 by SAE International in United States
Global automotive fuel economy and emissions pressures mean that 48V hybridisation will become a significant presence in the passenger car market. The complexity of the powertrain solutions is increasing in order to further increase fuel economy for hybrid vehicles and maintain robust emissions performance. However, this results in complex interactions between technologies which are difficult to identify through traditional development approaches, resulting in sub-optimal solutions for either vehicle attributes or cost. This paper presents the results from a simulation programme focussed on the optimisation of various advanced powertrain technologies on 48V hybrid vehicle platforms. The technologies assessed include an electrically heated catalyst, an insulated turbocharger, an electric water pump and a thermal management module (a coolant valve replacing a conventional thermostat). The novel simulation approach undertaken uses an integrated toolchain capturing thermal, electrical and mechanical energy usage across all powertrain sub-systems. Through integrating 0-D and 1-D sub-models into a single modelling environment, the operating strategy of the technologies can be optimised while capturing the synergies that exist between them. This approach enables improved and more…
 

Using Laser Metal Printing to Cool Computer Chips

  • Magazine Article
  • TBMG-34595
Published 2019-06-01 by Tech Briefs Media Group in United States

Traditionally, electronics are cooled using a heat sink that transfers the heat generated by the electronic system into the air or a liquid coolant. For the heat sink to work, it has to be attached to the CPU or the graphics processor via a thermal interface material such as thermal paste. It helps facilitate the transfer of heat by bridging microscopic gaps between the heat sink and the chip.

 

Medium-Frequency Transformer Transitions from AC to DC

  • Magazine Article
  • TBMG-34410
Published 2019-05-01 by Tech Briefs Media Group in United States

Traditionally, electronics are cooled using a heat sink that transfers the heat generated by the electronic system into the air or a liquid coolant. For the heat sink to work, it has to be attached to the CPU or the graphics processor via a thermal interface material such as thermal paste. It helps facilitate the transfer of heat by bridging microscopic gaps between the heat sink and the chip.

 

Glossary of Engine Cooling System Terms

Cooling Systems Standards Committee
  • Ground Vehicle Standard
  • J1004_201904
  • Current
Published 2019-04-22 by SAE International in United States
The objective of this glossary is to establish uniform definitions of parts and terminology for engine cooling systems. Components included are all those through which engine coolant is circulated: water pump, engine oil cooler, transmission and other coolant-oil coolers, charge air coolers, core engine, thermostat, radiator, external coolant tanks, and lines connecting them.
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Vehicle Cold Start Mode Fuel Economy Simulation Model Making Methodology

Maruti Suzuki India, Ltd.-Bhoopendra Singh, Parikshit Mehra, Amit Gautam
Published 2019-04-02 by SAE International in United States
The air pollution and global warming has become a major problem to the society. To counter this worldwide emission norms have become more stringent in recent times and shall continue to get further stringent in the next decade. From OEMs perspective with increased complexity, it has become a necessity to use simulation methods along with model based systems approach to deal with system level complexities and reduce model development time and cost to deal with the various regulatory requirements and customer needs. The simulation models must have good correlation with the actual test results and at the same time should be less complex, fast, and integrable with other vehicle function modelling. As the vehicle fuel economy is declared in cold start condition, the fuel economy simulation model of vehicle in cold start condition is required.The present paper describes a methodology to simulate the cold start fuel economy. The simulation methodology includes the engine heat balance equation, heat conduction through cylinder walls and heat convected by air. Based on the heat transferred and heat absorbed by…
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