An often asked question from industrial machine builders or integrators is how they can effectively design or implement the conversion of a machine with servo technology to meet performance expectations. This is a specialized task filled with layers of complexity that can prove difficult to execute, even when the scope of work is fully understood.

Towards the Direct Evaluation of Turbine Isentropic Efficiency in Turbocharger Testing

2016-01-103304/05/2016

Turbocharging is playing today a fundamental role not only to improve automotive engine performance, but also to reduce fuel consumption and exhaust emissions for both Spark Ignition and diesel engines. Dedicated experimental investigations on turbochargers are therefore necessary in order to get a better understanding of its performance. The availability of experimental information on realistic turbine steady flow performance is an essential requirement to optimize engine-turbocharger matching calculations developed in simulation models. This aspect is more noticeable as regards turbine efficiency, since its swallowing capacity can be accurately evaluated through the measurement of mass flow rate, inlet temperature and pressure ratio across the machine. Actually, in the case of a turbocharger turbine, isentropic efficiency directly evaluated starting from measurement of thermodynamic parameters at the inlet and outlet sections can give significant errors. This inaccuracy is mainly

Marelli, Silvia, Marmorato, Giulio, Capobianco, Massimo, Boulanger, Jean-Maxime

Design Methodology and Development of an Economical 3D Printer

2016-01-032504/05/2016

Additive manufacturing has experienced rapid growth over a span of 25 years. Additive manufacturing involves the development of a three-dimensional (3D) object by stacking layer upon layer. Conventional machining techniques involve the removal of material. However, this technique differentiates itself from other techniques by means of addition of the material. The integration of CAD with additive manufacturing has offered the ability to create complex structures. Despite its clear benefits, additive manufacturing suffers from a high initial investment. An average cost of an entry level commercial 3D printer is 600$. A low-cost 3D printer has been designed and built for experimental investigation within a budget of 300$. The paramount process of 3D printing involves a combination of interpreting data from CAD files and controlling the motors using this data. The various design considerations while developing the 3D printer have been discussed. The 3D printer developed, provides the user

Javed, Farhan, Javed, Salman

Study of Optimization of Reciprocating Parts for General-Purpose Engine with Aluminum-Alloy Connecting Rods

2015-32-080511/17/2015

The connecting rods employed in most of general-purpose engines with a power from 1.5 kW to 10 kW are manufactured from aluminum alloy in order to increase productivity and reduce weight, and therefore display lower material strength than steel connecting rods. In terms of operating conditions, general-purpose engines are frequently operated under high load while being held at a comparatively low engine speed, necessitating strength and durability in relation to combustion pressure. Realizing a balance between the rigidity of each part is an important factor in reconciling the achievement of weight reduction in the reciprocating parts while also keeping strength. The research discussed in this paper developed a structure optimization system to examine shape parameters for reciprocating parts targeting 4 kW class engines, and studied shapes that would balance the reduction of weight with the keeping of strength. These realizes design shapes of 4 kW class engines in which the stress

Okubo, Masami, Suzuki, Masato

Evaluation of Drain Life and Filtration of Engine Oil for New Gen-ICV's Operating in Extreme Conditions

2015-01-287609/29/2015

In tropical conditions, twelve numbers of ten ton intermediate commercial vehicles run at regular interval from zero to 60000 kilometer. Vehicle field run data were composed and analyzed with intended duty cycle for engine oil drain life estimation. The intermediate commercial vehicle trucks with sump capacity 0.083- 0.104 liter/HP and SAE 15W40 viscosity of oil meeting API CH-4, API CI-4+ from group-I and group-II base stocks are considered. The engine wear is more a function of silica concentration, load factor and age than the API category of the oil. Oil drain interval is found to be proportional to the sump volume for the same stress on the oil. Iron concentration and kinematic viscosity decide to be useful oil life with respect to the limits fixed by the engine manufacturer. In tropical conditions, field trials are carried out on 10 ton payload vehicles at higher temperature, humidity, dust levels and payload factor. API CI-4+ oil provide higher level of protection against soot

Patil, Shankar, Mahesh, P, Sadagopan, Krishnan, Gokhul, Senniappan Arunachalam

Choosing the Right Drive Technology

TBMG-22931

09/01/2015

Although there are a number of variations of drive technologies for motion applications, there are a few that are used for the majority of systems being built today. These most common drives do take a bit of understanding before applying.