Beatrice Lang
Porsche's adoption of electric power steering in its 911 and Boxster models in 2011 marked a significant shift, sparking debates about the impact on steering feel and feedback. The new electromechanical system, utilising electric motors instead of hydraulic fluid, aimed for improved efficiency by activating only when the steering wheel was turned. While some criticised the change as detracting from the traditional Porsche steering experience, others acknowledged its advantages, including cost savings, ease of installation, and maintenance-free operation. The move towards electric steering by Porsche, a renowned sports car manufacturer, reflects the evolving nature of automotive technology and the ongoing pursuit of innovation.
| Characteristics | Values |
|---|---|
| Year of electric steering adoption | 2011-2012 |
| Models | 991, 911, Boxster |
| Sensors | Two: one to measure inputs from the driver and one to measure inputs from the road |
| Steering feel | Less granular and feelsome than previous models |
| Steering weight | Lighter than previous models |
| Fuel economy | Saves .1 liters of fuel per 100km, or .0264 US gallons of petrol per 62 miles |
| Ease of installation | Easier than hydraulic steering |
| Maintenance | Essentially maintenance-free |
| Cost | Cheaper than hydraulic steering |
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What You'll Learn
- The 2012 Porsche 911 Carrera S features fully electromechanical steering
- The 991 model uses electric motors to assist steering without hydraulic fluid
- Electric steering saves fuel by not powering the steering pump when driving straight
- Electric steering is cheaper and easier to install than hydraulic steering
- Porsche's electric steering is bottom-up, using data to vary assistance and weight at the wheel
The 2012 Porsche 911 Carrera S features fully electromechanical steering
The 2012 Porsche 911 Carrera S is a remarkable vehicle, boasting a range of impressive features and capabilities. One notable aspect is its fully electromechanical steering system, marking a significant change from previous models. This innovative steering technology sets it apart and contributes to its exceptional performance and handling.
The electromechanical steering in the 2012 Porsche 911 Carrera S operates through a combination of sensors and software calibration. It utilises two sensors with distinct purposes: one measures inputs from the driver, while the other measures inputs from the road. Based on these inputs, the system provides electrically motivated assist, ensuring a responsive and controlled driving experience. This assist feature can be particularly noticeable when turning the wheel, resulting in a tiny lag and surge that some drivers may find unusual.
Porsche's approach to electric steering is unique compared to other systems. Instead of calculating assistance through input torque from the steering wheel (a "top-down" approach), Porsche goes "bottom-up." They utilise data from various sources, including steering angle, yaw rate, and stability control sensors, to vary the assistance and "weight" at the wheel. This data-driven approach allows them to customise the steering feel and make it distinct from other vehicles, including other Porsche models.
The fully electromechanical steering in the 2012 Porsche 911 Carrera S offers both advantages and considerations. On the one hand, it provides exceptional precision, stability, and agility, contributing to its overall dynamic performance. It also enhances fuel economy, as the steering pump is not powered when travelling straight. On the other hand, some drivers may notice a difference in steering feel compared to previous 911 models or hydraulic steering systems, which is a matter of personal preference.
Overall, the 2012 Porsche 911 Carrera S, with its fully electromechanical steering, exemplifies Porsche's commitment to innovation and performance. While the steering feel may be subject to individual preferences, the technology enhances the vehicle's handling capabilities, practicality, and fuel efficiency. This model continues to be recognised as one of the world's outstanding sports cars, showcasing Porsche's attention to detail and performance.
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The 991 model uses electric motors to assist steering without hydraulic fluid
Porsche's 991 model uses electric motors to assist steering without hydraulic fluid. This was a notable change from the previous hydraulic steering system, which used a hydraulic pump to motivate power steering fluid. The electric steering system in the 991 model operates by utilising two sensors: one to measure inputs from the driver and the other to measure inputs from the road. Based on these inputs, the system provides electrically motivated assistance according to Porsche-specific software calibration.
The adoption of electric power steering in the 991 model offered several advantages. One key benefit was improved fuel economy. By employing an electric motor that only uses energy when the steering wheel is turned, the system saves fuel when driving in a straight line, which accounts for approximately 90% of the time, according to Porsche's research. Additionally, the electric steering system eliminates the weight and complexity associated with hydraulic pumps, hoses, and fluid, resulting in a slight improvement in fuel efficiency.
However, the electric steering system in the 991 model also received some criticism. Some drivers expressed a preference for the feel and feedback of the previous hydraulic steering system. The electric steering was described as less engaging and lacking the granular, feelsome feedback of its hydraulic predecessor. There was also a mention of a slight lag and surge of assist when turning the wheel, creating a different steering feel.
Despite the mixed reactions, Porsche defended its decision to adopt electric steering, citing cost and ease of installation as factors. Electric steering eliminates the need for a hydraulic pump in the engine bay and fluid lines to the steering gear, making it cheaper and easier to implement. Additionally, electric steering is maintenance-free and can be easily tuned through software adjustments, providing flexibility across different car models and variants.
The introduction of electric steering in the 991 model marked a significant shift for Porsche, showcasing their continued innovation and willingness to adopt new technologies. While some purists may have preferred the traditional hydraulic steering, the electric steering system offered improved efficiency, reduced weight, and manufacturing benefits.
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Electric steering saves fuel by not powering the steering pump when driving straight
Porsche has a long history of innovation in automotive technology, dating back to its founder, Ferdinand Porsche, who designed the world's first hybrid car in 1900. More than a century later, Porsche continues to push the boundaries of automotive technology, including the adoption of electric steering systems.
The introduction of electric power steering (EPS) in modern cars, including Porsche models such as the 2012 911, has sparked debates among driving enthusiasts. Some purists lament the "death of steering feel" and argue that electric steering systems detract from the tactile feedback and driving experience associated with hydraulic steering.
However, electric steering offers significant advantages in terms of fuel efficiency. Electric steering saves fuel by not powering the steering pump when driving straight. In contrast, hydraulic steering systems continuously run the pump, resulting in wasted energy. By eliminating the need to power the pump when no assistance is required, electric steering improves fuel economy by a few percent.
Additionally, electric steering systems offer other benefits, such as easier installation, reduced maintenance, and compatibility with autonomous driving technology. They can also automatically adjust to crosswinds or uneven road surfaces, enhancing the overall driving experience.
While some drivers may prefer the traditional feel of hydraulic steering, electric steering technology has evolved to provide a more refined driving experience. Porsche, known for its performance-focused vehicles, has likely considered the feedback from drivers and made enhancements to its electric steering systems to strike a balance between fuel efficiency and driving dynamics.
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Electric steering is cheaper and easier to install than hydraulic steering
Porsche's electric steering has been the subject of intense debate in motoring circles. Some Porsche enthusiasts have lamented the ""death of steering feel" with the introduction of electric power steering in models like the 2012 911. They argue that it doesn't offer the same granular, tactile feedback as traditional hydraulic steering systems.
However, electric steering has its advantages, and it is no surprise that more carmakers are switching to electric steering assist. One of the primary benefits is that it is cheaper and easier to install than hydraulic steering. Electric steering eliminates the need for a hydraulic pump in the engine bay and the associated fluid lines to the steering gear. This simplifies the installation process and reduces maintenance requirements.
The steering hardware for electric steering can be standardised across different car models, with software adjustments made to suit each application or variant. This flexibility in design and tuning is an advantage that hydraulic systems cannot match. Additionally, electric steering provides a more consistent steering experience at different speeds.
From an engineering perspective, electric steering is lighter and more efficient than hydraulic steering. Hydraulic systems rely directly on engine power, whereas electric steering draws power from the battery only when the wheel is turned, resulting in improved fuel economy. Electric steering systems are also less prone to leaks and blockages, which are common issues with hydraulic systems that use fluids.
While some drivers may prefer the traditional feel of hydraulic steering, electric steering offers cost savings, ease of installation, and improved efficiency. These factors contribute to the growing adoption of electric steering in the automotive industry.
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Porsche's electric steering is bottom-up, using data to vary assistance and weight at the wheel
Porsche's electric steering is a significant shift from the traditional hydraulic steering system, marking a new era for the renowned car manufacturer. The adoption of electric power steering EPAS in the new 911 and Boxster models sparked debates among Porsche enthusiasts, with some lamenting the "death of feel'n'feedback" in the iconic Porsche steering wheel.
However, Porsche's approach to electric steering is unique and innovative. Porsche employs a "bottom-up" strategy, as described by Porsche's General Manager Chassis Development Suspension, Steering and Hydraulic Systems, Florian Sprenger. This approach leverages the abundance of data accessible through the CAN, including steering angle, yaw rate, and stability control sensor inputs. By utilising this data, Porsche varies the assistance and "weight" at the wheel, ensuring a dynamic and responsive driving experience.
The bottom-up method contrasts with the "top-down" approach of rival EPAS systems, where assistance is determined by the input torque from the steering wheel. Porsche's system, on the other hand, allows for more flexibility and customisation to suit different applications or variants. This adaptability is a key advantage of electric steering over hydraulic systems, which require physical adjustments for each car model.
The 2012 Porsche 911 Carrera S, for example, features fully electromechanical steering with two sensors. One sensor measures inputs from the driver, while the other captures inputs from the road. This information is then processed through Porsche-specific software calibration to provide electrically motivated assistance. While some enthusiasts claim that the steering feel is different from previous 911 models, Porsche ensures that there is sufficient steering feel and weight to safely guide the vehicle at high speeds.
In conclusion, Porsche's electric steering is a forward-thinking innovation that utilises data to vary assistance and weight at the wheel. By embracing the bottom-up approach, Porsche continues its legacy of pioneering automotive technology, offering drivers a unique and adaptable steering experience.
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Frequently asked questions
Porsche adopted electric steering with the 2012 911 Carrera S.
Electric steering is cheaper and easier to install and maintain. It also saves fuel by not powering the steering pump when travelling straight.
Electric steering leaves some enthusiasts disappointed due to a lack of feel and precision. However, it is still preferred over hydraulic steering, which can steal 8-10 horsepower under load.
