Porsche Stability Management (PSM), which provides a high level of active driving safety at longitudinal and lateral limitations, is at the core of the active driving dynamics control systems. The PSM includes the ABS (anti-lock brake system), ASR (anti-slip regulation), MSR (engine drag torque control), ABD (automatic brake differential), “precharging of the brake system,” and “brake assist” features. Precharging the brake system improves braking readiness, which in turn shortens emergency stopping distances. The PSM hydraulic unit transfers braking fluid to the wheel brakes before the brake pedal is depressed if the accelerator pedal is swiftly depressed, as is frequently the case before an emergency stop. This ensures that the brake system is perfectly ready for the impending braking by causing the brake pads to lightly press against the brake discs. As a result, stopping distances are shortened and the response behavior of the brake system is greatly improved.
PSM has two stages for turning off. The system features an individually switchable mode with the name PSM Sport in conjunction with the Sport Chrono Package. This mode is accessed by pressing the PSM button in the center console. “PSM Sport” is substantially different from the default mode in terms of functionality and enables ambitious drivers to push their Porsche to its absolute limits, for instance on a racetrack. The function permits noticeably larger yaw movements around the vertical axis and a greater amount of slip on the drive wheels than “PSM On,” enhancing the vehicle’s dynamic performance. This eliminates the need for even seasoned sporty drivers to completely deactivate the PSM. Pressing and holding the PSM button initiates the “PSM Off” mode. This is in line with the Porsche philosophy that permits users to completely turn off the control system at any time. Strong braking in the ABS control range, however, reactivates the entire stabilizing effect of the PSM system in “PSM Off” and “PSM Sport” mode, but only until the brake is lifted once again.
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Information technology: Porsche Stability Management
When the 996 Carrera 4 was unveiled in 1998, Porsche debuted PSM, an electronic stability control system designed to keep your 911 moving in the right direction even when you veered off course.
PSM has been constantly improving since it was made a widely accepted standard feature in 2003, leading to the system we now use in the most recent 991s.
PSM, which is used to refer to a variety of electrical controls that all work together to provide optimal stability, is essentially an umbrella word for multiple systems. Numerous sensors are being watched, and the ABS sensors are used to measure wheel speed.
In order for the PSM system to determine the true direction of movement at all times, measurements of the engine speed, throttle position, lateral acceleration, yaw (the car rotating around a central axis), and steering wheel position are also taken.
If the automobile begins to understeer or oversteer, the PSM system can take preventative action based on this data. The PSM light will begin to flash and the inside rear wheel will automatically apply the brakes to help the car turn tighter if the front end begins to slide.
In contrast, the outside front wheel is selectively braked to offer rear end stability if the back ends steps out. The PSM threshold is raised in Sport Plus mode, enabling a larger slip angle to be attained.
In order to increase traction, PSM additionally uses an Automatic Brake Differential (ABD). If traction is lost, this brakes the rotating wheel and transfers power to the wheel that has higher traction.
Another method of controlling traction is to use a normal traction control system, which temporarily reduces power output by delaying the engine’s starting. For the purpose of preserving stability, the PSM system on PDK vehicles can also affect gear shifts.
The PSM system also controls the ABS system, which is active even when PSM is switched off via the button on the center console (as does the ABD).
If the PSM controls are switched off and one of the front wheels needs ABS assistance, they will automatically re-engage (in Sport Plus mode, both front wheels require ABS assistance before PSM is re-engaged). By doing this, you may be sure that the PSM will be ready to keep you out of trouble even while you’re driving recklessly.
The best approach to brush up on Porsche’s increasingly sophisticated engineering is to use our online “technology explained” features. Go here to read them all.
driving within one’s capabilities
The idea was to provide safe environments for drivers to experience the exceptional driving dynamics of a Porsche, specifically on closed race courses or practice areas. Even in PSM mode, Peglau claims, the control system doesn’t kick in until the vehicle reaches its stability limits. “However, PSM-on mode can slightly reduce the vehicle’s potential performance on uneven surfaces or long stretches of curves, as those on the Nordschleife of the Nurburgring. PSM Sport, on the other hand, allows you to complete your quickest lap much like PSM-off mode. In addition, its control approach provides sports drivers with a foundational degree of assistance should they unintentionally attempt to go beyond the bounds of physics in the quest for their fastest lap. For instance, it uses moderate brake interventions to lower the required steering dynamics.”
The safety net is also getting much wider in the background at the same time. PSM turns back on more or less fast depending on the previous pressure if the driver is having trouble and the brake pedal pressure exceeds the anti-lock braking system’s activation threshold. Already, this “emergency anchoring” feature resembles PSM-off mode. From 62 to 93 mph, PSM Sport mode eventually converges with PSM-on mode. The only thing that can happen right now, even at speeds over 93 mph, is a traction control system intervention, however this depends on how much traction the road surface has.
According to Peglau, “PSM Sport takes the driver by the hand and slowly brings him up to PSM-off mode, because that option, of course, continues to be available. However, it should continue to be used as the most extreme method by the most skilled, as it has always been. like Vanina Ickx driving a 911 Turbo S. She tried to picture PSM Sport driving a race vehicle. She responds, “Why not?” In our Le Mans prototypes, the traction control was a big aid in several conditions.
CoolHobieCat
Another name for Porsche Stability Management (PSM) is “Please Save Me.” On my 2016 Porsche Cayman, PSM is standard equipment. This is nicely illustrated visually in the video down below. (It will probably not be long until we are driving all-wheel-drive vehicles.) The technical explanation can be found in the second link. I ordered a Porsche in part because of this wonderful item.
This reminds me of my high school years, and I start to wonder how I’m still around. Geez…..
Does Porsche PSM resemble PASM?
The Porsche Active Suspension Management system (PASM) is an electronic active damping system that is standard on the most potent variants of Porsche’s current Boxster, Cayman, Macan, and Cayenne models but available as an optional extra on all of the lesser-powered vehicles. Additionally, the system is a standard feature on all 911 and Panamera models.
Porsche PSM (Porsche Stability Management), a stability control system that attempts to improve traction while reducing understeer and oversteer, should not be confused with Porsche PASM.
The PASM system includes a special collection of fluid-filled dampers, each of which is equipped with a valve that can be used to restrict the flow of oil inside the component, changing how stiff the suspension of the vehicle is. The driver can choose between two damper settings using a button located on the center console of the vehicle.
The damper valve is left open in Normal mode, allowing fluid to flow freely. According to Porsche, this environment combines performance and comfort. By closing the damper valve and limiting the flow of oil, sport mode produces a stiffer ride that, in Porsche’s opinion, improves handling.
Sports vehicles like the 718 Cayman and Boxster come with PASM, which lowers the ride height by 10mm. The technology can also be used in conjunction with Porsche’s air suspension system, which is installed in the Macan and Cayenne, to provide a ride height that is adjustable in six steps.
Porsche’s Active Suspension Management system, when available as an option, is priced in accordance with the model for which it is specified. It costs roughly PS1,000 for the 718 Boxster and Cayman; the Cayenne has a similar price point, but the Macan offers it for about PS800. For about PS1,900 on the Macan and PS2,600 on the Cayenne, the system on the two Porsche SUVs can also be specified with air suspension.
We’ve driven examples of every Porsche model that has PASM installed, and the feature actually alters how the cars drive noticeably. Depending on the specific model, Sport mode substantially improves the already remarkable body control, handling significant compressions and abrupt crests with ease. However, if you’ve also selected one of the larger wheel sizes, the damping may be a little stiff on UK roads.
We advise choosing PASM adaptive suspension if you’re interested in a Boxster, Cayman, Macan, or Cayenne and have the extra cash to spare. It gives the Cayenne more flexibility, the Boxster and Cayman more capability, and it transforms the Macan into one of the best-handling SUVs on the road.
Would you choose the Active Suspension Management system from Porsche? Please share with us in the comments area below.
How is a Porsche PSM turned off?
Vehicles with the Sport Chrono package: Activating PSM Sport, according to GTK. The system turns to a specific athletic mode when PSM Sport operation is selected.
PSM help is restricted in critical driving circumstances outside the ABS control range when in PSM Sport mode.
Turning off PSM – When PSM is turned off, essential driving conditions outside of the ABS control range no longer receive PSM support.
Press the button just once (vehicles with Sport Chrono package: press button for at least 2 seconds). The PSM is turned off after a little wait. Both the PSM OFF warning light in the instrument panel and the indication light on the button turn on. notification when the PSM is switched.
View a few PDE videos of the kick plate and skid pan. Drivers with a reasonable amount of experience believe they manage the issue well. When the instructor switches off PSM, they absolutely lose control. Enough that I’m aware not to switch it off.
What does a car’s PSM do?
7 November 2020 The PCM, often known as the powertrain control module, is the brain of your car. Based on the data it receives from different sensors located throughout the car, it controls the engine, gearbox, and other components.
Do I have PASM on my Porsche?
The FAQ will answer all of your queries if you click on the underlined terms in this page for PASM or Sport Chrono.
In conclusion, both sport chrono and sport chrono without PAM are valid options. For each, there is a different button. If you have a PASM button (which resembles a shock), you have PASM; if you don’t, you don’t. The button is considerably simpler to find than wires coming out of shock towers, which can also be checked.