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Technical Paper

Promising Natural Organic Rosin Based Composites Fabricated at Stove Top Temperature

Rosin is a naturally available organic material obtained especially from pine trees. It finds many usages and applications in areas like soldering, pharmaceuticals, building work, engineering field etc. In this work, an attempt has been made to study experimentally the improvement in strength of rosin at normal stove top temperature by means of combining rosin in various ratios with some important organic hardeners and chemicals of literature importance. A table top book press was fabricated for the purpose of rosin pressing using simple tools like teak wood, bolt and nuts. Experiments were conducted using commonly used kitchen gas stove, fabricated book press, rosin raw material, aluminium sulfate powder, maleic anhydride chemical, acetone, ethanol and saw dust particles for making different combination materials using rosin as the main element. Results showed that, rosin on its own without additives showed higher viscosity and brittleness.
Technical Paper

Analytical Evaluation of Impact Loads on Oscillating Rear Axle of Wheel Loaders

Wheel Loaders are heavy equipment machines which are used in construction fields. The main structure of a wheel Loader has a front and a rear bogie, connected through articulating pin joints. The wheel loaders have two axles viz. front and rear axles carrying its Front and Rear bogies. The front axle carrying front frame is fixed and articulates clockwise and anticlockwise about rear frame. However, to reduce the spillage of material carried in bucket while travelling in uneven terrains, the rear axle is designed to oscillate along the roll direction of vehicle movement. The rear axle is connected to rear frame with bearing hub called axle oscillation hub having separate shaft arrangement with tapered roller bearings (TRB). When machine operates in uneven terrain, the oscillating rear axle hits the rear frame structure which induces an impact load on vehicle structure. Mass and speed of the vehicle play a critical role in loader stability and safety.
Technical Paper

An Extensive Optimization Methodology to Validate the Exhaust After-Treatment System of a BS VI Compliant Modern Diesel Engine

The Indian automotive industry has migrated from BS IV (Bharat stage IV) to BS VI (Bharat Stage VI) emission norms from 1st April 2020. This two-step migration of the emission regulations from BS IV to BS VI demands significant engineering efforts to design and integrate highly complex exhaust after-treatment system (EATS). In the present work, the methodology used to evaluate the EATS of a high power-density 1.5-liter diesel engine is discussed in detail. The EATS assembly of the engine consists of a diesel oxidation catalyst (DOC), a diesel particulate filter with selective catalytic reduction coating (sDPF), urea dosing module and urea mixer. Typically, all these components that are needed for emission control are integrated into a single canning of shell thickness ~1.5mm. Moreover, the complete EATS is directly mounted onto the engine with suitable mounting brackets on the cylinder block and cylinder head.