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Training / Education
2014-10-16
Developing vehicles that achieve optimum fuel economy and acceleration performance is critical to the success of any automotive company, yet many practicing engineers have not received formal training on the broad range of factors which influence vehicle performance. This seminar provides this fundamental understanding through the development of mathematical models that describe the relevant physics and through the hands-on application of automotive test equipment. Attendees will also be introduced to software used to predict vehicle performance. The course begins with a discussion of the road load forces that act on the automobile (aerodynamic, rolling resistance, and gravitational) followed by a review of pertinent engine characteristics. This background information is then used to show how appropriate gear ratios for a vehicle transmission are selected and to develop models for predicting acceleration performance and fuel economy. The models form the basis for the computer software used to predict vehicle performance.
Event
2014-10-09
Event
2014-10-09
For most Heavy Duty (HD) diesel engines over 50% of total fuel energy is lost to the ambient as heat (exhaust and coolant). Eaton Roots (Supercharger) technology has been used as expander (Roots Expander to demonstrate an efficient Organic Rankine Cycle (ORC) Waste Heat Recovery (WHR) system for a HD diesel engine. The present work includes a baseline engine characterization to identify and quantify the potential waste energy sources and correlate the thermodynamic models. Thermodynamic models were used to assess the merits of various WHR layouts and WHR components on system performance. An average of 6% fuel economy improvement has been predicted for Eaton Supercharger based expander in an ORC WHR system with ethanol as a working fluid for HD diesel engines
Event
2014-10-09
The need to identify and implement cost-effective technologies capable of delivering quantifiable improvements in vehicle efficiency is a top priority for the entire heavy duty vehicle continuum. Topics being invited include: IC Engine Technologies, Hybrids (both electric and hydraulic), Whole-Vehicle Technologies (electrification, cooling systems, low rolling resistance tires, aerodynamics, etc.) and Intelligent Transportation Systems.
Technical Paper
2014-09-30
Dr.Rajadurai Sivanandi, Prakash Krishnan, Naveen Sridharan, Manimaran Sethuramasubramaniyam
Canning is the process of mounting the support mat & substrate into the shell. Canning is a very important aspect in the catalyst converter design, especially with the current trend of using thinner wall and ultra-thin wall substrates. Considering the reduced isostatic and shear strengths of thin and ultra thin wall substrates, conventional canning technique will reduce canning durability where the mat or the substrate or the shell may be damaged. This brings into requirement a controlled canning process which shall not disturb the canning durability. The paper shall explain an established controlled canning process developed at a very low investment yet with effective outputs using a DOE methodology for choosing the best suited practices for the respective parts for canning. The outputs were cross verified using push out test and GBD verification using destructive methodology and the results obtained were competitive.
Technical Paper
2014-09-30
Sivanandi Rajadurai PhD, Guru Prasad Mani, Sundaravadivelu M, Kavin Raja
Simulation’s drive towards reality boundary conditions is a toughest challenge. Experience has shown that often the most significant source of error in thermal and dynamic analyses is associated within specified boundary conditions. Typically, validating the system by considering both thermal and dynamic loads with predefined assumptions is time consuming and inconclusive when confronted to reality boundary conditions. Thus, solution comes in unique way of combining thermal and dynamic loads with specified boundary conditions will convey computational results closer to real scenario. As a consequence, strain concentrated regions due to thermal expansion are aggregated more, when coupled with dynamic loading. The stress generated by the coupled analyses will proves to be critical in concerning the durability issue of the hot end system. These conditions were evaluated by a finite elements model through a linear and non-linear approach, which had its results summarized.
Magazine
2014-06-05
Watching for ways to stand above the crowd Sensors monitor a broad range of parameters to help powertrain design teams add features and improve performance.
Video
2014-04-23
Christoph Kemper, General Manager, Rochling Automotive Customer Center North America, discusses the company's solutions for lightweighting and vehicle efficiency with Automotive Engineering magazine at SAE 2014 World Congress.
Video
2014-04-14
This video summarizes Chapter 5 of the book, “Theory and Applications of Aerodynamics for Ground Vehicles”, by Dr. T. Yomi Obidi, published by SAE International. Concepts demonstrated include the effect of various vehicle components on performance and tire rotation, tire size, and effect on permformance.
Event
2014-04-10
Focusing on tire and terrain mechanics modeling for load simulations, tire model development, parameters identification, and sensitivity analyses, tire test development, road profile characterization, effective road profile development, and interactions between tire, suspension/steering/brake systems, and different terrains, spindle loads/travel variation characteristics from proving ground test on deterministic and rough roads, terramechanics, tire noise, rolling resistance and correlation studies.
Event
2014-04-09
Focusing on multibody system modeling and simulation results, rigid and flexible body modeling, mount loads predictions for vehicle body, frame/sub-frame, leaf-spring, exhaust system, driveline, and powertrain, the comparison of modeling techniques between vehicle dynamics simulation and durability loads simulation, optimal development process considering vehicle dynamics and durability loads, data processing and analysis techniques, loads sensitivity analyses for various model parameters, DOE and optimal design techniques for loads minimization, prediction of manufacturing tolerance effects on loads, robust design methods, driver modeling, and FE-based system modeling.
Event
2014-04-09
Focusing on analysis and enhancement of vehicle dynamics performance including handling / braking / traction characteristics, operational robustness and active stability under the influence of loading, tire forces and other variants; development and applications of intelligent tire technology; modeling, simulation, testing and optimization; correlation of analyses, simulations, objective measurements and subjective judgments of vehicle dynamics characteristics; chassis control development and control system cooperation for enhancing overall vehicle system dynamics and safety characteristics and robustness taking into considerations of load variations and other uncertainties; impact of system hybridization and electrification on vehicle dynamics and controls.
Event
2014-04-08
Focusing on new theory, formulation and modeling of amplitude-, frequency- and temperature-dependent nonlinear components/systems such as rubber and hydraulic mounts or bushings, shock absorbers, and any joint friction/damping; dynamic characterization through lab and field testing; Linearization methodology; Model validation, application, and sensitivity analysis in vehicle system/subsystem simulations; Nonlinear system identification, modeling, and application in testing accuracy improvement, etc.
Event
2014-04-08
Focusing on studies of driver behavior modeling, driving simulator techniques, vehicle ride comfort evaluation and enhancement, test/simulation correlation analysis, vehicle elastomeric component modeling (i.e. bushings, rubber mounts, springs, dampers, seat cushions), passive, semi-active and active suspension systems, suspension seat analysis and modeling techniques, the effect and control of beaming, shaking, impact harshness, brake judder and any other phenomena affecting ride comfort of driver, passengers, goods, etc.
Technical Paper
2014-04-01
Shugang Jiang, Michael H. Smith
Abstract Variable compression ratio and variable displacement technologies are adopted in internal combustion engines because these features provide further degrees of freedom to optimize engine performance for various operating conditions. This paper focuses on a multiple-link mechanism that realizes variable compression ratio and displacement by varying the piston motion, specifically the Top Dead Center (TDC) and Bottom Dead Center (BDC) positions relative to the crankshaft. It is determined that a major requirement for the design of this mechanism is when the control action changes monotonically over its whole range, the compression ratio and the displacement should change in opposite directions monotonically. This paper presents an approach on how to achieve multiple-link mechanism geometric designs that fulfill this requirement. First, a necessary and sufficient condition, and a stronger sufficient condition are obtained on how the TDC and BDC positions should change with respect to the control action to fulfill the design requirement.
Technical Paper
2014-04-01
Guang Wu, Xing Zhang, Zuomin Dong
Abstract Plug-in hybrid electric vehicles (PHEVs) with post-transmission parallel configuration attracted considerable attention due to their capacity to operate in either electric vehicle (EV) mode or hybrid electric vehicle (HEV) mode. Meanwhile, the added flexibility and multiple operation modes add additional challenges to vehicle control with acceptable drivability, particularly during the mode transition from the EV and HEV, since proper control is needed for the internal combustion engine (ICE), motor and coupling device to achieve smooth and fast transition, under various vehicle operation constraints such as mode-transition duration, vehicle acceleration fluctuation and friction loss of the dry clutch. In addition, the engagement of dry clutch features torque discontinuity due to slip-stick phenomenon and the dynamic behavior of the ICE further increases the nonlinearity of the powertrain system. This research introduces a method for identifying the theoretically optimal drivability during mode transition and feasible control schemes to effectively coordinate different powertrain components and achieve desirable drivability without violating vehicle operation constraints.
Technical Paper
2014-04-01
Hiromu Soya, Makoto Yoshida, Kazutaka Imai, Yoshitaka Miura, Yuuki Matsushita
Abstract The new Jatco CVT8 High Torque (CVT8 HT) was developed for use on front-wheel-drive vehicles fitted with a large displacement engine. The development objectives set for this new CVT with a high torque capacity were outstanding fuel economy, size and weight reductions. To achieve those targets, a high torque capacity CVT chain was newly developed in cooperation with LuK GmbH & Co. KG. This article describes the efforts undertaken to develop increasing torque capacity.
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