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Viewing 1 to 30 of 241
2013-11-27
Technical Paper
2013-01-2755
Saurabh gupta, Robesh Maity Sr, Shrirang Kulkarni cEng
Paddy farming in India needs extensive water usage. Due to the rapidly declining ground water and ever increasing monsoon uncertainty, there is significant drive on water conservation for paddy farming through sustainable agriculture practices. The wide variability of irrigation water in Indian rice field, as high as 160 mm, necessitates an extra 100 mm of water in the field to provide complete water coverage. This is primarily due to inaccurate manual land leveling, often practiced in Indian paddy farming. In the present work, architecture of laser land leveler has been created by integrating low cost electronics, hydraulics and GPS technology. This paper will provide an overview of the current practices and suitable operating mode to meet the future demand on land leveling. The presentation would compare the laser land leveler with GPS land leveler solution architectures. The technological differences along with individual merits and limitations would be detailed.
2013-01-09
Technical Paper
2013-26-0017
Marcin Rychter
A tachograph which belongs to the group of ORD devices is the oldest recorder (On Board Recording Devices), and the duty of taking it was led into the USA already in 1939. In order to solve all these problems, they led with Directive of Advice No. 2135/98 from 24 September 1998 of the August of 2004 from the beginning of in the area of the European Union, new type of registering setting up in the road transport - digital tachograph. In order to make it impossible to abuse, a complex system of keys was applied cryptological and of certificates, saved in grating and devices, letting for explicit determining entitlements of users and authenticities of data, cards and devices. In spite of using the most modern keys and securing systems, with respect to elements of the system of digital tachographs a lot of modus operandis were observed so that they registered wrong sizes.
2016-04-05
Technical Paper
2016-01-0097
Felix Gow, Lifeng Guan, Jooil Park, Jaekwon Kim
Abstract Tire Pressure Monitoring System (TPMS) has become a popular system due to regulation in many countries. TPMS consists of sensors that measure air pressure and temperature in the tires. Each sensor transmits tire information to TPMS central unit for display purpose via RF. Commercial trailers having bodies longer than 7 m require RF repeaters to increase the data transmission range. Located near to rear wheels, RF repeater receives sensor signal in the rear wheels and transmits the signal to TPMS central unit. In this paper, we discuss RF repeater which transmits at multiple frequencies in order to increase signal reception. On TPMS central unit, RF receiver is able to tune to receive frequencies used in sensors and RF repeater. Other method for improving reception is to transmit same payload multiple times at same frequency as that of sensor. In the paper, other important specifications are discussed as RF repeater design is concerned.
2013-11-27
Technical Paper
2013-01-2799
Rahul Jagdale, Prashant bardia, Mark Schmaltz
The automotive electronic systems are composed of two major mechanical elements: an equipment housing or enclosure, and a printed circuit board (PCB) assembly. The PCB is made up of alternating layers of copper and FR-4 glass epoxy laminated together. An estimation of the mechanical reliability of a PCB in an electronic system is considered to be an important part of the overall reliability estimate of the entire system and vibration is often one of the key causes of system and component failures. As different kind of electronic components (like transformers, capacitors, chips etc) are mounted on both sides of the PCB using solder joints, adhesive etc, various complexities are encountered while modeling them for analysis. For avoiding those, simple PCBs without any components are considered for the present study. This paper focuses on the methodology to understand and predict the dynamic behavior of the system using various mechanical tests and simulations.
1959-01-01
Technical Paper
590099
W.C. EDMUNDSON
1958-01-01
Technical Paper
580339
H. L. HARTZELL
1956-01-01
Technical Paper
560204
DONALD R. BUERSCHINGER
1956-01-01
Technical Paper
560115
H. L. HARTZELL
1949-01-01
Technical Paper
490192
W. H. FOLAND
2007-10-30
Technical Paper
2007-01-4216
Wentao (William) Yu, Dan Williams
This paper is concerned with power consumption analysis for conventional steering system, the importance of duty cycle before choose appropriate pump drive system, and the energy saving potential of the proposed systems. After reviewing the recent efforts in developing energy-efficient steering system, two new on-demand pump drive systems are proposed to provide varying flow according to vehicle/engine speed: one is the combination of a sized pump without flow control valve and an Electrical Power Hydraulic Steering (EPHS) unit; the other is the combination of multiple EPHS units. The energy saving advantage of the combinations will be emphasized for different duty cycles.
2007-10-30
Technical Paper
2007-01-4220
C. V. Godbold, Jonathan L. Tolstedt
Phoenix International, the electronics manufacturing group of John Deere, has developed a product and manufacturing process to address many of the shortcomings of conventional heatsinking technologies. In this process, a thin circuit board is bonded directly to a flat surface heatsink such as a finned extrusion or liquid-cooled plate. The major benefits of the proposed solution are the simplification of the manufacturing process and substantially improved conduction of heat away from high-power circuitry.
2007-10-30
Technical Paper
2007-01-4197
Jochen Gessat
Electrically Powered Hydraulic Steering (EPHS) was developed in the early 90s and previously applied to vehicle segments B and C (small and medium-sized passenger cars). Till now more than 10 million vehicles are in the field. The advantages consist of the well known power density coming along with the flexible package. Value is added due to the consequent development and usage of electronic control realized in compact physical units. As a result key features for chassis control systems like controllability, high dynamic performance, and low energy consumption are achieved while maintaining mature and robust hydraulic components. Recent market requirements in other segments, e.g. Sport Utility Vehicles (SUV) and Light Commercial Vehicles (LCV) require higher powered motor pump units and lead to the decision to develop products in this direction.
2007-10-30
Technical Paper
2007-01-4164
Paul Gomori, Michael Thiessen, Norm Benes, Roberta Herron
This presentation identifies the elements that make up a total electronics system, which can be used to help OEMs provide a competitive edge to their customers for efficient vehicle asset management.
2008-10-07
Technical Paper
2008-01-2711
Larry Long, Gardell Gefke, Brian McKay
Hardware-in-the-loop (HIL) testing has become an essential verification step in the development of vehicle electronics and software systems. New system concepts continue to drive the requirements for HIL systems. The use of an open architecture for HIL testing provides many benefits to meet these requirements quickly and cost effectively. In this paper we will discuss the development of an open architecture HIL system for a J1939 bandwidth study. We will show how this HIL system was used to test and validate that a heavily loaded networks can operate without compromising the performance of safety critical systems
2008-10-07
Technical Paper
2008-01-2710
Nabil Hammad
The DC power supply is ingredient part in the automotive industries as it has been used as a DC power supplies for a wide range of loads. Meanwhile, it is mandatory for battery charging. These types however, causes many problems such as poor power factor, high input current harmonics distortion and uncontrolled DC voltage. In this paper, an improved input power factor correction that uses a combined control system consists of two nested loops with a feedback of the DC voltage and input current as long as a feed forward from the output power. The system has been analyzed, modeled, simulated and experimentally verified. The novel feature of the proposed control scheme resides in fact that it is not only achieve nearly unity power factor with minimum input current total harmonics distortion only but it also introduce superior performance in DC voltage transient conditions.
2008-10-07
Technical Paper
2008-01-2712
Will Cooper, James Lenz, Anant Mishra
The history of off-road equipment manufacturing has been based on proven designs and long times between model updates. In sharp contrast with this strategy is the electronic manufacturing services (EMS) industry. The EMS industry is driven by the larger consumer product industry's continuing pressure for lower costs. Because of this, EMS tools, processes, and practices have evolved to support rapid technology and component changes. However the increasing consumer demand for features like better user-interfaces, more efficient fuel consumption, and the desire for increased operational controls in equipment have forced the off-road industry to increase the frequency of product updates to meet customers' needs. Equipment manufacturers make running changes leading to a “Learning-by-doing” development and manufacturing process. But rapid changes sometimes have an unpredictable impact on the reliability of the final product.
2008-10-20
Technical Paper
2008-21-0035
Zach Bonefas, Stewart Moorehead
There are many unique aspects related to implementing unmanned agricultural vehicles. Automated navigation systems, drive by wire electronics and implement control are already widely available in the marketplace providing a firm foundation for unmanned vehicles. Variable environments, harsh weather conditions, large vehicles and implements and high costs present challenges to bringing unmanned systems to the agriculture marketplace. The lack of existing standards is another limiting factor that calls for a united effort from industry, academia and government. Despite these factors, unmanned vehicles will be part of the future of agriculture, providing increased productivity and helping to meet the world's growing food needs.
2005-11-01
Technical Paper
2005-01-3586
Chuck Howard, Anand Vedam
This paper discusses a statistical approach to the analysis of power consumption in Class 8 Sleeper Trucks. We will also make recommendations for the electrical design of Class 8 truck. The paper discusses past electrical devices, why device use has increased, and how electrical system design has changed to keep up with truck evolution. We will analyze the electrical loads on the vehicle. This will include a list of cab and sleeper loads common to heavy trucks, current draws, and the advantages this analysis will give to the electrical designers. The analysis also provides peak and average electrical consumption for typical trucks, which helps in optimizing the associated electrical design of a truck power system. Six Sigma is used to analyze the electrical load data. Six Sigma is a systematic, data driven approach to statistically describe a process. Our process of designing an electrical system will greatly benefit from the use of this tool.
2005-11-01
Technical Paper
2005-01-3587
Chuck Howard, Phil Irwin
This paper discusses implementing 120V AC on trucks. We will discuss the following topics: A. A brief history of AC generation B. AC power requirements on trucks C. Issues and concerns D. Summary and conclusion
2005-11-01
Technical Paper
2005-01-3578
John Carlin, Charles Birdsong, Peter Schuster, William Thompson, Daniel Kawano
The future of vehicle safety will benefit greatly from precrash detection - the ability of a motor vehicle to predict the occurrence of an accident before it occurs. There are many different sensor technologies currently available for pre-crash detection. However no single sensor technology has demonstrated enough information gathering capability within the cost constraints of vehicle manufacturers to be used as a stand alone device. A proposed solution consists of combining information from multiple sensors in an intelligent computer algorithm to determine accurate precrash information. In this paper, a list of sensors currently available on motor vehicles and those that show promise for future development is presented. These sensors are then evaluated based on cost, information gathering capability and other factors.
2005-11-01
Technical Paper
2005-01-3546
Matthew Burke, Robert Oaten
A typical 10 tonne Midi-bus driveline includes an electric retarder device, located at the transmission output, which is used during vehicle braking thereby reducing service brake usage and wear. The retarder is activated via the brake pedal and operates down to speeds of 1 kph. To reduce cost and complexity it may be possible to delete the electric retarder when an infinitely variable transmission (IVT) powertrain is used in place of the standard 5 speed automatic transmission (5AT). The purpose of this study is to determine the amount of service brake usage, in terms of energy dissipation, for both the 5AT (with retarder) and IVT (without retarder) over the Millbrook London Transport Bus (MLTB) drive cycle. Validated MATLAB® dynamic models of both drivelines are used to calculate retarder and service brake usage.
2006-10-31
Technical Paper
2006-01-3519
Jinming Yang, Jason Bauman, Al Beydoun
The key to effectively applying model-based methodology to the development of real-time embedded systems hinges on creating an executable model composed of graphical representations that correctly and accurately reflect the requirements, functionality, and implementation constraints for the system under development. To achieve such goals, developers face similar technical and engineering challenges to those experienced with a traditional development process. In this paper, we present an architecture-oriented model design methodology aimed at combating these challenges. The methodology involves decomposing the system functionality into a set of smaller and more manageable pieces, assembling these pieces into an integrated model, placing the model in a controllable and maintainable test environment, and resolving any model implementation issues. The methodology described in this paper has been successfully applied to production projects and has proven to be effective.
2006-10-31
Technical Paper
2006-01-3501
Jinming Yang, Jason Bauman, Al Beydoun
The ever-increasing complexity and cost of automotive electrical systems are driving the change in automotive electronics development from traditional approaches to model-based methodology and processes. In this paper, we present an effective model-based development process particularly suitable for dealing with changes to existing designs, or “feature change” types of projects, in which the design and implementation procedures are often imposed by constraints due to the mandatory adoptions of legacy code and carryover designs. The new process herein involves creating “executable” requirements and functional models, generating test scenarios and/or cases, using the test cases for clarifying customer requirement specifications, using the clarified test cases for testing at various levels, and verifying the hardware-in-the-loop test results captured from the proprietary automatic test equipment.
2006-10-31
Technical Paper
2006-01-3500
Roy McCann, John Daily, Glenn Addo
This paper reviews the basics of radio frequency identification technology and the existing uses in commercial vehicle systems. The specific engineering design challenges associated with the metallic environments encountered in commercial applications are discussed. An empirical design method using a variable dielectric thickness is given. Experimental results for the use of RFID in the metallic environment encountered in a commercial vehicle demonstrate the validity of the design method.
2006-10-31
Technical Paper
2006-01-3495
Mikael Adenmark, Matthias Deter, Thomas Schulte
Modern vehicles use Electronic Control Units (ECU), connected via Controller Area Network (CAN) to perform functions. Many of these functions are distributed across several ECUs. This network interconnection enables the sharing of sensors, calculated information and actuators. As new functionality is added, the number of ECUs and their complexity increase. This paper describes the values and possibilities of a Hardware-In-the-Loop (HIL) based Integration Lab, which enables a wide range of automatic tests to be performed on networked ECUs. The Integration Lab is the complex rebuild of a Scania truck/bus, containing the ECU superset, for connecting and testing networked ECUs. It involves more than 30 ECUs and eleven CAN networks.
2006-10-31
Technical Paper
2006-01-3494
Yaamini Devi Loganathan, Bharathi Krishnamoorthy
Automotive electronics penetration in commercial vehicle segment, in India and other developing countries is in a primitive stage. Introducing a new technology into automobile applications may involve unpredictable failure modes, imposing several risks on the OEM (acronyms are mentioned in the last section) and causing financial losses. Low failure rates can only be achieved by rigorous testing before the product launch. This will help to achieve the required safety and reliability at the system level. The conventional method of testing has some drawbacks. This paper briefs on an advanced testing methodology, as well as a low cost system using telemetry for a trip-information computing unit. It also brings out the merits and demerits on using this system compared to conventional testing as well as other sophisticated testing systems. Towards the end, the paper proposes an alternate testing method and also relevant future works in this domain.
2006-10-31
Technical Paper
2006-01-3486
Kouichi Okamoto, Toshiki Ezoe, Shuuji Narada, Ichinose Naosi, Masahiko Hirano, Koichi Fujita
In fatal accidents due to heavy duty trucks, the fatalities of occupants in passenger cars in which rear-end collision occur account for the largest percent. Collisions to the vehicles in traffic jams and collision to other accidents scenes on express ways can result in serious repercussions. Therefore the system which reduces the damage of collisions has long been demanded and here the world-first Pre-crash Safety (PCS) System for heavy duty trucks was developed. This system gives warning to the driver in case there is a possibility of collision with preceding vehicles, and activates the brakes to mitigate damage in case there is a higher possibility of collision. In order to get the maximum effect on the express ways where the trucks are in high speed, it is necessary to give warning and activate the brakes with relatively early timing.
1992-11-01
Technical Paper
922488
James Becker, Mahmood Pourkermani, Eskandar Saraie
A dual-voltage alternator is a single alternator which produces two simultaneous and independently regulated electrical outputs, as shown in Fig. 1. This means that a vehicle with a single dual voltage alternator will be capable of powering, simultaneously, both the standard vehicle 12 volt electrical system (which powers lights, horn, instruments) and also to power another electrical system at a different voltage. The other, or secondary electrical system, is typically a higher voltage system. It may be a 24 volt electrical system to power military communications equipment, or it may be a 48 volt electrical system to provide power for other vehicle electrical power needs, such as electrical heaters for engine emission control. This paper describes a dual-voltage alternator design for automotive applications.
1992-11-01
Technical Paper
922495
Donald O. Murphy, Jerry D. Woll
This paper describes a forward looking on-board vehicle detection and driver alert system that provides a distance indication and alert tone to the driver. The system, called VORAD (Vehicular On-board Radar), is the first of its kind to be fielded. The system can be programmed to function in different operating modes, allowing customization to the user's requirements. Some possible operating modes include simply providing an alert to the driver, providing following distance indication measured in seconds based on the vehicles' speeds, or providing following distance measured in feet. The VORAD System also has optional features to enhance its usefulness, including a blind spot alert system and a built-in event recorder. The blind spot system provides additional information to the driver regarding the presence of vehicles in his blind spot for use in making lane changes.
1989-09-01
Technical Paper
891856
John E. Mahoney
The new generation of Hitachi hydraulic excavators is called the “Intelligent Excavators” because of the technological developments of the “Micro-Computer” controller that effectively and efficiently regulates both the diesel engine and variable displacement pump output.
Viewing 1 to 30 of 241

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