Delphi Launches World's Most Advanced Roll-Control System

PARIS -- (MARKET WIRE) -- Jul 23, 2008 -- A new Active Stabiliser Bar System (ASBS) -- that delivers better steering feel, improved vehicle dynamics, superior comfort and greater tuning capability compared with today's technologies -- is being developed by Delphi Corp. (PINKSHEETS: DPHIQ). The system is the first to provide continuous across-centre control and is 60 percent lighter and around 65 percent more compact than the previous generation system, making it the world's most advanced roll-control technology.

Delphi was first to market with an Active Stabiliser Bar System in 1999 and has subsequently developed both linear and rotary systems for a range of applications. In 2005, Delphi's second generation system was launched on the Range Rover Sport, contributing to its world-class combination of handling, comfort and off-road ability. The unique ball screw rotary actuator technology provides the highest angular articulation of any system currently in production and is also the most efficient, converting around 95 percent of pump energy into hydraulic pressure compared with around 65 - 85 percent for competitor systems.

"The new system keeps Delphi comfortably ahead of the competition," comments development manager Olivier Raynauld. "Generation 3 ASBS provides best-in-class performance by any measure and has helped us win some very exciting development programmes across a range of vehicle types."

A traditional stabiliser bar improves vehicle stability through corners by reducing roll angle and managing the tyre to road interface. High performance vehicles and heavy vehicles with a high centre of gravity typically require stiff, large diameter stabiliser bars but these will substantially reduce ride comfort and refinement and can also reduce traction in some conditions. Traditional stabiliser bars also restrict wheel travel, decreasing off-road performance for SUVs, and can create an effect known as 'head toss' that can be particularly uncomfortable in vehicles where the occupants are seated high.

Delphi's ASBS technology splits the stabiliser bar in the middle, allowing a computer-controlled actuator to apply a variable level of torque to each end. When the vehicle is travelling in a straight line, the system effectively de-couples the stabiliser bars from the vehicle, substantially improving ride comfort and allowing up to 88 degrees of free stabiliser bar rotation for greater wheel articulation. In a corner, anti roll torque is instantly applied and can be optimised for any driving condition in just 20ms.

The key innovation that gives the third generation technology its additional dynamic and refinement benefits is a new hydraulic control system. Contemporary systems use a directional control valve to reverse the hydraulic pressure and hence the force applied to the roll bars. This gives poor steering feel around centre, with limited control authority when travelling in a straight line and can also generate significant noise.

Delphi's patented continuous pressure control system solves these issues by eliminating the need to switch the direction in which pressure is applied and by maintaining a constant small on-centre pressure to improve steering feel and response. Switching noise is eliminated and two channel control allows component sharing front-to-rear and the integration of different control calibrations for comfort and sport modes. Because it is truly active (i.e., it can apply force to the suspension), the system can also be used to tune roll damping. The high efficiency of the system further reduces noise and allows a proven pump to be used with a small reservoir and low-cost, easily routed hoses.

"With Generation 3, we can tune the steering feel and dynamic behaviour via the roll-control system and change the response as vehicle speed increases," adds Raynauld. "For example, we can provide oversteer at low speeds to give sharp, agile handling in towns, with subtle levels of understeer at high speeds to increase safety and provide a feeling of sure-footed security for the driver."

"No one else is offering on-centre pressure control," continues Raynauld. "It's a significant breakthrough that we are very proud of. Customers who have analysed the Delphi system tell us that it is clearly the best available."

Other innovations throughout the system, including new techniques for attaching the roll bars to the actuators, substantially reduce size and mass and mean that Delphi is able to deliver the system at an extremely competitive price. Delphi expects to enter production with a linear actuator system in 2011 and with a rotary actuator system in 2012, both for European customers.

Delphi's portfolio of ASBS technologies includes systems suitable for most classes of vehicle. The company also supplies a wide range of other chassis control technologies including electronic stability systems, variable damping control systems and antilock braking systems.

For more information about Delphi, visit the Virtual Press Room is at www.delphi.com/media

FORWARD-LOOKING STATEMENT

This press release as well as other statements made by Delphi may contain forward-looking statements that reflect, when made, the Company's current views with respect to current events and financial performance. Such forward-looking statements are and will be, as the case may be, subject to many risks, uncertainties and factors relating to the Company's operations and business environment which may cause the actual results of the Company to be materially different from any future results, express or implied, by such forward-looking statements. In some cases, you can identify these statements by forward-looking words such as "may," "might," "will," "should," "expects," "plans," "anticipates," "believes," "estimates," "predicts," "potential" or "continue," the negative of these terms and other comparable terminology. Factors that could cause actual results to differ materially from these forward-looking statements include, but are not limited to, the following: the ability of the Company to continue as a going concern; the ability of the Company to operate pursuant to the terms of the debtor-in-possession financing facility and its advance agreement with GM, to obtain an extension of term or other amendments as necessary to maintain access to such facility and advance agreement; the Company's ability to obtain Court approval with respect to motions in the chapter 11 cases prosecuted by it from time to time; the ability of the Company to consummate its amended plan of reorganization which was confirmed by the Court on January 25, 2008 or any other subsequently confirmed plan of reorganization; risks associated with third parties seeking and obtaining Court approval to terminate or shorten the exclusivity period for the Company to propose and confirm one or more plans of reorganization, for the appointment of a chapter 11 trustee or to convert the cases to chapter 7 cases; the ability of the Company to obtain and maintain normal terms with vendors and service providers; the Company's ability to maintain contracts that are critical to its operations; the potential adverse impact of the chapter 11 cases on the Company's liquidity or results of operations; the ability of the Company to fund and execute its business plan (including the transformation plan described in Item 1. Business "Plan of Reorganization and Transformation Plan" of the Annual Report on Form 10-K for the year ended December 31, 2007 filed with the SEC) and to do so in a timely manner; the ability of the Company to attract, motivate and/or retain key executives and associates; the ability of the Company to avoid or continue to operate during a strike, or partial work stoppage or slow down by any of its unionized employees or those of its principal customers and the ability of the Company to attract and retain customers. Additional factors that could affect future results are identified in the Annual Report on Form 10-K for the year ended December 31, 2007 filed with the SEC, including the risk factors in Part I. Item 1A. Risk Factors, contained therein. Delphi disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events and/or otherwise. Similarly, these and other factors, including the terms of any reorganization plan ultimately confirmed, can affect the value of the Company's various prepetition liabilities, common stock and/or other equity securities.

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