How do you provide a large SUV with sporty road-holding properties and minimal body roll without impairing ride comfort? Audi has resolved this by implementing electromechanical roll stabilization (eAWS). Assisted by the 48-volt onboard electrical system and powerful actuators, the stabilizers on the front and rear axle can be actively controlled according to the driving situation. As a result, the models retain their high level of ride comfort in straight-line driving. By contrast, in cornering and load alteration situations, they impress with enhanced lateral dynamics combined with minimal body roll. The technical advantages of Audi’s electromechanical solution: it is energy-efficient, operates in near-real-time and is virtually maintenance-free due to the absence of hydraulic elements.

What challenges do large SUV models pose to chassis engineers?

Customers of larger SUVs are thrilled by their many practical elements – from ample space in the cabin to cutting-edge chassis technologies to powerful engines and advanced control and assistance systems. Plus, an SUV can deliver superb performance off paved roads. Due to their design, these vehicles feature a higher curb weight and a higher center of gravity. This means that the body of an SUV leans more toward the outside in cornering than it does on models with a lower center of gravity.

What technology counteracts body roll and body movements?

In cornering, the body leans toward the outside due to the centrifugal forces, in other words, the wheel on the outside of the corner goes into jounce travel while the one on the inside of the corner goes into rebound – the vehicle rolls around its longitudinal axis. Torsionally flexible anti-roll bars between the left- and the right-hand side of the axle are proven means of compensating for this effect. They help reduce the body’s tendency to roll by applying reverse torsion torque to the suspension on the outside and inside of the corner, thus counteracting the body’s tendency to roll. This passive suspension component has the same effect in both cornering and straight-line driving. However, an effect that is desirable in cornering may impair ride comfort in straight-line driving on roads with bumps or potholes on one side of the surface. While passive solutions can reach their limits here, Audi has resolved this by means of electromechanical roll stabilization. Using sensors to capture and detect the situation, the system is designed to intervene with pinpoint precision only when less body roll is desired. Thus, the spring rate of the stabilizers on uneven and straight roads is lowered to a basic level and the spring and damper forces act by and large independently on the left- and right-hand wheels.

How does electromechanical roll stabilization work?

A conventional stabilizer operates passively. In other words, it just balances the suspension movements on both sides by means of mechanical coupling. By contrast, electromechanical roll stabilization can be specifically controlled. The system consists of two stabilizer halves per axle, with an electric motor operating between them on both the front and rear axle. It can rotate the stabilizer halves in opposite direction of each other and thus generate torque that counteracts body roll torque – individually for each wheel. As a result, it reduces the body roll angles and actively supports them against the physical effects of the driving situation. The system receives its commands via control units on the front and rear axle, which are part of the Electronic Chassis Platform (ECP). The ECP is the central brain of the chassis. Within milliseconds, it matches a variety of parameters such as speed, ride height, roll and pitch movements of the car, the friction coefficient of the road surface, the current driving condition such as under- or over-steer, plus the data of the chassis systems involved. From this input, the system calculates the ideal responses for the integrated components and adjusts them quickly and precisely to each other. The required electrical energy is supplied to the eAWS by a powerful 48-volt onboard electrical system. Within milliseconds, the system calculates suitable actuation values for the stabilizers. The electric motors deliver their power output via three-stage planetary gearboxes, with torque levels of up to 1,200 Nm being generated at the stabilizers.

What is “Vorsprung durch Technik” in the case of an electromechanical solution?

The 48-volt system enables an immediate system response even at low speeds. Latency between the sensors detecting body roll and the response by the electric motors is just a few milliseconds. Unlike hydraulic solutions, the eco-friendly electromechanical system does not require oil circuits and is maintenance-free. It is even able to recuperate energy by capturing suspension impulses on its electric motor, converts them into electrical energy and stores it in the lithium-ion battery of the onboard electrical system. The electromechanical solution uses energy more efficiently as well. In contrast to hydraulic circuits, it does not have to store and provide pressure.

How does the driver benefit from the system?

The system helps reduce the body’s tendency to roll, provides a sportier and more confident handling impression and emphasizes the versatile character of the large SUV models. It can actively distribute roll torque to the front and rear wheels and influence the car’s intrinsic steering characteristics such as the tendency to under- or oversteer. The Audi drive select driving dynamics system offers various setup options for this. Electromechanically active roll stabilization imparts to the driver a dynamic and precise feel in a variety of situations and enables enhanced handling characteristics. It is one of various systems that perfect the dynamism of the top-end models of the Q range. The Audi Q7, SQ7, SQ8 and RS Q8 models with their controllable stabilizers respond to the driving situation precisely as expected by the driver. On uneven road surfaces, the body movements are reduced while ride comfort increases. In sporty driving and at high cornering speeds, the car feels more stable and at ease. It pushes itself into a bend in the road. Audi has deliberately selected a setup that does not completely neutralize the roll angle but continues to impart an authentic feel of the driving dynamics situation.

How is the system on the racetrack and the real world?

Impressive proof of the influence of the controllable stabilizers was provided by race and test driver Frank Stippler in the fall of 2019. As part of the development work for the Audi RS Q8 the professional race driver, who in 2019 won the 24-hour race at the Nürburgring for the second time with Audi, set a new lap record for production SUVs. He managed to drive the 20.832-kilometer distance of the race track in the Eifel region in just 7:42 minutes. Forty percent of global Audi customers who have ordered a large Audi SUV model have chosen the option of electromechanical active roll stabilization. (MT)

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Bengaluru-headquartered engineering R&D company L&T Technology Services (LTTS) has been certified at Caterpillar’s 2025 Supplier Excellence Recognition (SER) event. This marks the second consecutive recognition for LTTS following its initial certification in 2024.

The recertification highlights LTTS's delivery, quality standards and its relationship with Caterpillar in the Mobility segment.

As a strategic supplier, LTTS provides engineering services that support Caterpillar and its customer base. LTTS has worked on Caterpillar’s sustainability goals and has driven engineering innovation and operational performance.

Alind Saxena, Executive Director and President of Mobility and Tech at L&T Technology Services, said, “This recognition means a great deal to all of us at LTTS. Being SER-certified two years in a row is a testament not just to our team’s dedication, but also to the strength of our relationship with Caterpillar. We deeply appreciate Caterpillar’s support and the trust placed in us. Our pledge is to continue raising the bar, adding value, and delivering engineering excellence in everything we do.”

Caterpillar's recognition is awarded to suppliers who meet criteria in areas including quality assurance, timely delivery, innovation and alignment with the company’s values.

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Aptiv, a global technology firm, has announced its Gen 8 radar technology, designed to meet the demands of advanced driver-assistance systems (ADAS). The radars, powered by Aptiv’s antenna and silicon design, deliver the performance and resolution needed to support Artificial Intelligence (AI) and Machine Learning (ML)–driven ADAS functions.

The Gen 8 radars are intended to allow hands-free driving in complex city environments, providing perception at a lower cost. Both front-facing and corner radar units represent a step forward in how vehicles sense their surroundings, offering reliable performance across real-world conditions.

The same core technology also powers the new Aptiv PULSE Sensor, a solution that combines radar and camera data to improve perception around the vehicle. By integrating ultra short-range capability with a surround-view camera, PULSE is claimed to be able to replace up to four ultrasonic sensors, improving detection accuracy while reducing system complexity and cost for vehicle manufacturers.

Javed Khan, Executive Vice-President and President of Software, Advanced Safety and User Experience, Aptiv, said, “Aptiv pioneered radar technology in production vehicles more than two decades ago, and today, we’re once again setting the pace. Our Gen 8 Radars mark a major step forward in the journey toward intelligent, software-defined vehicles – delivering all-weather reliability, 4D perception and deep environmental awareness that enable global automakers to safely and cost-effectively scale to higher levels of automation.”

Backed by over 25 years of radar technology experience, Aptiv’s Gen 8 radars use proprietary software and hardware, introducing improvements in performance for a broader range of driving solutions across challenging weather and lighting. The radars enable new driving scenarios – such as Navigation on Autopilot (NOA) – in complex environments like city streets and car parks, due to an expanded field of view.

The key features of Aptiv’s Gen 8 radar technology include –

• Forward Radar: Offers long-range detection beyond 300 metres with fine 4D angular resolution, allowing improved classification of static objects. This system delivers a 30 percent performance increase and doubles the vertical field of view compared to its predecessor.
• Dual-Mode Corner Radar: Improves the range performance of the previous generation by increasing the vertical field of view’s (FOV) resolution, providing capability in close-range, low-speed scenarios such as frontal automatic emergency braking (AEB) and automated parking. Compared to the prior generation, horizontal discrimination improved by 25 percent and vertical discrimination is now possible.

The Gen 8 radars aim to deliver detection, precision and adaptability. Aptiv claims it offers scalable solutions, including a large increase in object detection count and superior accuracy for target detection and tracking, even in high dynamic range environments. It also supports AI-powered systems by delivering high-quality sensor data to machine learning models.

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United States-based Edge Energy, a developer of patent-pending energy conversion technology for electric vehicle fast charging, has announced a strategic investment from Germany-based PRETTL Mechatronics & Actuators (PMA), a leading mechatronics solution supplier for the automotive, electronics and energy sectors.

The funding round includes an equity investment and working capital. This partnership will support Edge Energy’s expansion of access to EV charging and utilise PMA’s manufacturing and electronics capabilities.

Edge Energy’s EdgeEV Power Source is claimed to allow fast EV charging without expensive three-phase power upgrades, offering deployment up to six times faster than traditional methods. The technology allows businesses and fleet operators to install DC Fast Chargers in various locations, supporting EV uptake.

PMA’s U.S. subsidiaries provide capabilities in coil winding, encapsulation and automated assembly, serving industries like automotive and energy.

Shaun Shuler, CEO, of Edge Energy, said, “We’re thrilled to partner with PMA, whose electronic and manufacturing expertise aligns perfectly with our vision for accessible EV charging.”

Johannes Prettl, CEO, PMA Group, said, “Edge Energy’s innovative EV charging solutions complement PMA’s commitment to sustainable technologies. We are excited to partner with Edge Energy on their next stage of growth.”

The investment combines Edge Energy’s technology with PMA’s electronics and manufacturing capabilities, aiming for growth for Edge Energy.

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Tata Technologies has announced a partnership with Synopsys, a provider of engineering solutions, to accelerate the shift towards Software-Defined Mobility (SDV). The collaboration aims to accelerate the development, verification and validation of automotive electronics systems, helping Original Equipment Manufacturers address the complexity of SDVs.

The collaboration will combine Tata Technologies’ expertise in vehicle engineering with Synopsys’ virtualisation solutions to enable the deployment of electronics digital twins (eDTs).

The companies have already worked with a leading European luxury OEM in a pilot engagement, delivering a blueprint to transition the manufacturer's existing electrical/electronic (E/E) architecture to a next-generation software-defined design. Pilot programmes with other major OEMs are also underway across North America, Europe and India.

The joint effort will focus on major SDV domains, including ADAS, powertrain, chassis, infotainment and electrification. Key areas of focus include:

• Shift Left Enablement: Developing virtual prototypes and simulation models for early software bring-up.
• Analysis: Using Synopsys tools for performance, power, safety, and reliability analysis for faster ECU development cycles.
• Verification: Providing embedded systems and software verification and validation services aligned with ISO 26262 and ASPICE standards.

Sriram Lakshminarayanan, Chief Technology Officer, Tata Technologies, said, “The digital shift is redefining the future of mobility, and our partnership with Synopsys is a purposeful step towards realising a future led by software-defined innovations. As OEMs move to new ways of working, there is a growing demand for engineering and digital services. Together, we are empowering OEMs to deliver safer, smarter, and more sustainable vehicles that enhance the human experience and accelerate the industry’s transition to a software-defined future.”

Tom De Schutter, Senior Vice-President, Product Management & Markets Group at Synopsys, said, "The complexity of SDV systems requires a new level of collaboration across the automotive ecosystem. By bringing together our world-class digital twin, verification, and IP platforms with Tata Technologies’ engineering expertise and global delivery, we are enabling OEMs to accelerate development, validation and delivery of complex software- and AI-defined vehicles. The collaboration is a great example of how the automotive ecosystem is coming together to accelerate innovation while reducing risk and time to market in a dynamic mobility landscape.”

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