Mahindra and Mahindra Ltd

Ahmadābād, India

Mahindra and Mahindra Ltd

Ahmadābād, India

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Patent
Mahindra and Mahindra Ltd | Date: 2017-01-04

The present disclosure provides an arrangement for packaging an engine of a vehicle. The arrangement comprises a frame having a front end and a rear end, a vehicle body secured on the frame, a first pair of wheels coupled to the frame near the front end thereof and a second pair of wheels coupled to the frame near the rear end thereof, the first and second pair of wheels adapted to support the frame, and the engine transversely disposed with respect to the longitudinal axis of the frame, and drivingly coupled to at least one of the first pair of wheels and the second pair of wheels.


Abraham M.,Mahindra and Mahindra Ltd.
Annual Fuels and Lubes Asia Conference and Exhibition | Year: 2016

Fuel economy (FE) and CO2 reduction through low friction lubricants are important and easy to adopt. Optimization of fluid properties for an application is real challenge. A presentation covers the drivers for vehicle design; emission norms of EU and India; current scenario in India; engine oil specifications for UV/SUV; engine oil design drivers; FE engine oils characteristics; how friction modifier impact; durability performance of oil; and case studies involving FE on SUV and HD vehicle. This is an abstract of a paper presented at the F+L Week 2016 (Singapore 3/8-11/2016).


Peddi S.N.,Mahindra and Mahindra Ltd.
SAE Technical Papers | Year: 2013

Crashworthiness enhancement of vehicle structures is a very challenging task during the early design development process. Major factors influencing occupant injury in frontal impact are vehicle front crush space, crash pulse severity, restraint properties and occupant packaging space. This paper establishes a methodology to define suitable criterion that will guide the designers to select the optimal values of the above mentioned parameters during the early phase of the vehicle development. The usage of lumped mass models, pulse characterization techniques were explored to validate the results. Efficient crash energy management, the concepts of ride down and restraint efficiency parameters were also discussed in the paper. Copyright © 2013 SAE International.


The current trend of going green in emerging automotive markets is, by the conversion of internal combustion engine based vehicle platforms into electrified vehicle platforms. While this method of electrification reduces the product development life cycle drastically due to the availability of a readymade platform, there are certain areas that are always overlooked. While focus is given on obvious and necessary elements like power train & battery packaging, weight reduction, high voltage safety, thermal management etc., electro-magnetic compatibility is neglected in the conversion process. This paper shall describe, in detail and in particular, the effect of electrical transients created by legacy elements, already existing in the baseline platform. This is an outcome of electro-magnetic compatibility challenges faced during the conversion of an internal combustion engine powered vehicle into an electric vehicle. Despite electric power train components being robust at the sub-system level, the vehicle's functional safety was challenged on several occasions. Thorough investigations of this sporadic behavior revealed that it was attributed to noise generated out of reactive, legacy components. The experimental findings and results shall present a picture of the sporadic effects of noise, on the functional behavior of the vehicle. While explaining the challenges, emphasis is given on the need to address them at the design level rather than at the fully developed vehicle level. Copyright © 2013 SAE International.


Patidar A.,Mahindra and Mahindra Ltd
SAE Technical Papers | Year: 2010

In a very competitive environment, product development in automobile industry needs to be fast paced with best in quality to stay ahead in the race. Therefore a clear understanding of customer requirements is essential in successful design and development of systems. Failure in any system development step can result in costly design and tooling changes, schedule delays and ultimately, customer dissatisfaction. A team was formed to design and develop an automotive system by applying Design for Six Sigma Green Belt methods and tools. The hypothesis of this study was that a substantial opportunity exists to increase project efficiency while providing what customer wants, by following a standardized statistical work practice for managing requirements throughout the life of product development using the methodology of Design for Six Sigma DMADV (Define, Measure, Analyze, Design and Verify). In this paper an automotive HVAC system is designed following DFSS methodology. The application process of DFSS tools like Kano analysis for Voice of Customer, Monte Carlo Simulation for project duration calculation, Measurement System Analysis, Quality Function Deployment (QFD), Triz- contradict problem solving technique, Pugh matrix, Design of Experiment (DOE) strategies and process capability for HVAC system development is discussed. The paper will also present how the DFSS process can improve project performance, cost and time while delivering quality products to the customer. Copyright © 2010 SAE International.


Bhat M.S.,Mahindra and Mahindra Ltd.
SAE Technical Papers | Year: 2013

This paper deals with an analytical engineering method to reduce the stresses in a shaft. The specification and design of transmission shaft is of special significance in the layout of the vehicle transmissions. In this paper an analytical engineering calculation of typical automotive transmission shaft' stresses is done. Later calculated stresses are validated by C.A.E analysis. In the calculations most of the shaft design methodology is shown in detail. The calculations reduce the C.A.E iteration to almost to 1 as correlation is found between calculations and C.A.E analysis. Copyright © 2013 SAE International.


Kunal R.,Mahindra and Mahindra Ltd.
SAE Technical Papers | Year: 2011

This paper presents a simulation of the stiffness of the shift fork of a manual transmission using contact pattern analysis and optistrut. All the subsystem (i.e. synchronizer and the shift system component) are constrained to optimize the shift fork stiffness. A-5-speed manual transmission is used as an example to illustrate the simulation, co-relation and validation of the optimization of the gear shift fork stiffness. The shift system was modeled in the software to collate the synchronization force, shift system gap etc with the constraint on the shift fork. It is constrained by the synchronizer sleeve and the fork mounting on the gear shift rail. The synchronizer force is then applied on the gear shift fork pads which are translated to the synchronizer sleeve. It has a number of pads which come into contact at different occasion of the synchronization because of the varying stiffness of the fork. The contact is distributed to optimize the deflection of the fork in the synchronizer for abuse load. The synchronization force is distributed over the pads which are in contact during the synchronization phase. The fork tends to deflect with the synchronizer sleeve during synchronization thus acting as a damper and storing energy. In the free flight zone the energy is released thus providing a positive drop (The derivative function of the detent ramp profile should turn negative) and reducing the double bump i.e. (the force generated when the synchronizer sleeve hits the clutch body ring) during synchronization. It also reduces the fork pre- loading (the gear shift fork is always positively in contact with the synchronizer sleeve after the synchronization has taken place) as the fork is retrieved after synchronization from the sleeve contact. The gear shift lever vibration and gear rattle is also reduces as the shift fork contact from the gear shift sleeve is relieved. Thus the contact analysis and optistrut of the shift fork ensures that the gear shift fork is optimized for stiffness and stress thus aiding in synchronization. Copyright © 2011 SAE International.


Chhabra M.,Mahindra and Mahindra Ltd.
SAE Technical Papers | Year: 2016

By reducing overall noise emanating from Engine at design phase, permits to reduce both time-to-market and the cost for developing new engines. In order to reduce vibration and radiated noise in engine assembly, oil pan is one of the most critical components. This study explains the key-steps that are executed to optimize the oil pan design for 4-cylinder diesel engine by improving Normal Modes, modified Topology, reduced Forced Frequency Response and ATV analysis for reducing its noise radiation. Using Multi-body tool crankshaft forces were generated and the FE model of Base Design was analysed for its noise radiation and panel contribution was done for finding the most radiating panels using Boundary Element Method approach. A series of iterative optimization were carried out with commercial software. Parameters like Stiffness, material property, Ribbing patterns and Shape of the Oil pan was modified to shift the natural frequencies of the component and reduce the sound radiation. Subsequently, the article is concluded by results comparison of baseline design over optimized Vibro-Acoustic results which was obtained from Boundary Element Method showing 5-6 dB(A) reduction in 1meter Engine Noise. The presented methodology proves to help the designers with the definition of a design that reaches the requested Noise and Vibration targets, weight-cost targets along with the manufacturability constrains. Copyright © 2016 SAE International.


Patent
MAHINDRA AND MAHINDRA Ltd | Date: 2013-03-26

The present invention discloses a monoblock engine in which the head and the block of the engine are cast integrally. The engine incorporates a cylinder and water coolant jackets, intake manifold and an exhaust manifold, vertical intake and exhaust valves, core removal holes, and a push-fit type cylinder liner which is secured in place so that leakage of fuel from the cylinder is eliminated. The water coolant jackets for the head and the block are connected using four water jacket gateways or connectors. The monoblock is fitted with the crankcase using a leak proof & robust flange-joint and mechanical fastening system which is easy to install. The invention is embodied for a single cylinder engine as well as multi-cylinder engines. By integrating cylinder head and manifolds with block, the critical joint between head and block and head and intake Manifold will be eliminated. At the same time, gasket and mechanical fasteners for tightening also can be eliminated. The water jacket design is communized & optimized for both head and block for better performance.


Patent
MAHINDRA AND MAHINDRA Ltd | Date: 2015-02-24

The present disclosure provides an arrangement for packaging an engine of a vehicle. The arrangement comprises a frame having a front end and a rear end, a vehicle body secured on the frame, a first pair of wheels coupled to the frame near the front end thereof and a second pair of wheels coupled to the frame near the rear end thereof, the first and second pair of wheels adapted to support the frame, and the engine transversely disposed with respect to the longitudinal axis of the frame, and drivingly coupled to at least one of the first pair of wheels and the second pair of wheels.

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