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Technical Paper

Globalization of the Design for Manufacturability/Assembly Process within the Automotive Wiring Assembly Business

1999-03-01
1999-01-0052
Automotive wiring assembly design and manufacturing has evolved from a locally based business to a global business. It is common today to engineer the design of a wiring assembly in one region of the world, to manufacture it in a second region, and to assemble it into the vehicle in a third region. This creates a need for global collaboration, training and communications. Design for Manufacturability (DFM) is a tool that can aid in this, in developing common processes globally, and reducing the cost and design complexity of the product in the early design stages. To develop a global DFM process, an organization must develop and implement a strategy. This paper will review the approach that an automotive wiring assembly supplier adopted. It will enumerate the benefits of developing a global Design for Manufacturability process, selecting a champion, and using a twelve-step plan to integrate DFM into each region.
Technical Paper

A System-Safety Process For By-Wire Automotive Systems

2000-03-06
2000-01-1056
Steer-by-wire and other “by-wire” systems (as defined in the paper) offer many passive and active safety advantages. To help ensure these advantages are achieved, a comprehensive system-safety process should be followed. In this paper, we review standard elements of system safety processes that are widely applied in several industries and describe the main elements of our proposed analysis process for by-wire systems. The process steps include: (i) creating a program plan to act as a blueprint for the process, (ii) performing a variety of hazard analysis and risk assessment tasks as specified in the program plan, (iii) designing and verifying a set of hazard controls that help mitigate risk, and (iv) summarizing the findings. Vehicle manufacturers and suppliers need to work together to create and follow such a process. A distinguishing feature of the process is the explicit linking of hazard controls to the hazards they cover, permitting coverage-based risk assessment.
Technical Paper

Using the Six Sigma Methodology for Process Variation Reduction

2007-11-28
2007-01-2872
This paper is about the use of the Six Sigma Methodology, to solve variation problems in the manufacture area, at one of the Delphi Automotive Systems unit that manufacturer electrical harness. The DMAIC framework was followed, the improvements were done, eliminating the rots causes, and the use of Six Sigma methodology, was showed very efficient in solve problems. The methodology power, is in using a structured frame work, the DMAIC (Define-Measure-Analyze-Improve-Control), completing by quality quality tools (Pareto Chart, Five Why's, Cause and Effect Diagram) and statistical analyses, for example: variance analyses, hypotheses tests and Design of Experiments.
Technical Paper

Comparison of Air Meter Interface Strategies for Engine Management Systems

2000-03-06
2000-01-0546
When an air meter is specified for an engine management system, air meter accuracy is given high priority. Air meter manufacturers characterize the accuracy of their products using laboratory instrumentation to measure the air meter output vs. flow characteristics. Ultimately the air meter is applied to an engine management system in a vehicle. The engine management system must use the information provided by the air meter without the benefit of laboratory instrumentation. Therefore, the entire measurement system must be considered in evaluating the effective accuracy. The most fundamental aspect to consider is the output signal format between the air meter and the engine management system. Two commonly available formats will be investigated: frequency and voltage.
Technical Paper

Development Experience with Steer-by-Wire

2001-08-20
2001-01-2479
Recent advances in dependable embedded system technology, as well as continuing demand for improved handling and passive and active safety improvements, have led vehicle manufacturers and suppliers to actively pursue development programs in computer-controlled, by-wire subsystems. These subsystems include steer-by-wire and brake-by-wire, and are composed of mechanically de-coupled sets of actuators and controllers connected through multiplexed, in-vehicle computer networks; there is no mechanical link to the driver. This paper addresses fundamental benefits and issues of steer-by-wire, especially those related to automated vehicle control and steering feel quality as perceived by the driver.
Technical Paper

Open-Interface Definitions for Automotive Systems1 Application to a Brake by Wire System

2002-03-04
2002-01-0267
Today automotive system suppliers develop more-or-less independent systems, such as brake, power steering and suspension systems. In the future, car manufacturers like Volvo will build up vehicle control systems combining their own algorithms with algorithms provided by automotive system suppliers. Standardization of interfaces to actuators, sensors and functions is an important enabler for this vision and will have major consequences for functionality, prices and lead times, and thus affects both vehicle manufacturers and automotive suppliers. The investigation of the level of appropriate interfaces, as part of the European BRAKE project, is described here. Potential problems and consequences are discussed from both a technical and a business perspective. This paper provides a background on BRAKE and on the functional decomposition upon which the interface definitions are based. Finally, the interface definitions for brake system functionality are given.
Technical Paper

Delphi Electronic Throttle Control Systems for Model Year 2000;Driver Features, System Security, and OEM Benefits. ETC for the Mass Market

2000-03-06
2000-01-0556
Delphi has developed a second-generation Electronic Throttle Control system optimized for high volume applications. The Delphi system integrates several unique driver performance features, extensive security/diagnostics, and provides significant benefits for the vehicle manufacturer. For Model Year 2000, the Delphi ETC system has been successfully implemented on several popular SUVs and passenger cars built and sold around the world. The ETC driver features, security systems, and manufacturer benefits are presented as implemented on these Model Year 2000 applications.
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