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Active Body Control

March 11, 2023

Active Body Control, or ABC, is the Mercedes-Benz brand name used to describe electronically controlled hydropneumatic suspension.[1][2]

This suspension combines a high level of ride quality with control of the vehicle body motions, and therefore virtually eliminates body roll in many driving situations including cornering, accelerating, and braking. [2]

Mercedes-Benz has been experimenting with these capabilities for automobile suspension since the air suspension of the 1963 600 and the hydropneumatic (fluid and air) suspension of the 1974 6.9.

ABC was only offered on rear-wheel drive models, as all-wheel drive 4MATIC models were available only with Airmatic semi-active air suspension, with the 2019 Mercedes-Benz GLE 450 4MATIC being the first AWD to have ABC available.[2]

The production version was introduced at the 1999 Geneva Motor Show on the new Mercedes-Benz CL-Class C215.[3]

Description

In the ABC system, a computer detects body movement from sensors located throughout the vehicle, and controls the action of the active suspension with the use of hydraulic servomechanisms. The hydraulic pressure to the servos is supplied by a high pressure radial piston hydraulic pump, operating at 3,000psi. Accumulators regulate the hydraulic pressure, by means of an enclosed nitrogen bubble separated from the hydraulic fluid by a membrane. [1]

A total of 13 sensors continually monitor body movement and vehicle level and supply the ABC controller with new data every ten milliseconds. [1] Four level sensors, one at each wheel measure the ride level of the vehicle, three accelerometers measure the vertical body acceleration, one acceleration sensor measures the longitudinal and one sensor the transverse body acceleration. As the ABC controller receives and processes data, it operates four hydraulic servos, each mounted on an air and pressurized hydraulic fluid strut, beside each wheel.[4]

Almost instantaneously, the servo regulated suspension generates counter forces to body lean, dive and squat during various driving maneuvers. A suspension strut, consisting of a steel coil spring and a shock absorber connected in parallel, as well as a hydraulically controlled adjusting cylinder, are located between the vehicle body and wheel. These components adjust the cylinder in the direction of the suspension strut, and change the suspension length. This creates a force which acts on the suspension and dampening of the vehicle in the frequency range up to five hertz. [1]

The system also incorporates height adjustable suspension, which in this case lowers the vehicle up to 11 mm (0.43 in) between the speeds of 60–160 km/h (37–99 mph) for better aerodynamics, fuel consumption, and handling.[1]

The ABC system also allows self-levelling suspension, which raises or lowers the vehicle in response to changing load (i.e. the loading or unloading of passengers or cargo). [1] Each vehicle equipped with ABC has an “ABC Sport” button that allows the driver to adjust the suspension range for different driving style preferences. This feature allows the driver to adjust the suspension to maintain a more level ride in more demanding driving conditions.

The reliable function of the ABC system requires a regular hydraulic oil change and filter replacement.

The Mercedes-Benz C112 of 1991, Mercedes-Benz Vario Research Car[5] of 1995 and the Mercedes-Benz F200 of 1996 already featured prototype versions of ABC.

The first complete and ready-for-production version of ABC was introduced in 1999 on the top-of-the-line Mercedes-Benz CL-Class (C215).

In 2006, the Mercedes-Benz CL-Class (C216) introduced the second generation Active Body Control suspension, referred to as ABC Plus or ABC II in technical documentation. This updated suspension reduced body roll by 45%[6] compared to the first generation ABC suspension. ABC Plus had an updated hydraulic system design, with shorter hydraulic lines, and the pulsation damper was relocated to be mounted directly on the tandem pump.

In 2010 a crosswind stabilization function was introduced. In strong gusts of crosswind, and depending on the direction and intensity of the wind having an effect on the vehicle, this system varies the wheel load distribution in such a way that the effects of winds are largely compensated or reduced to a minimum. For this purpose the ABC control unit uses the yaw rate, lateral acceleration, steering angle and road speed sensors of the Electronic Stability Program ESP®.[7]

Magic Body Control

In 2007, the Mercedes-Benz F700 concept introduced the PRE-SCAN suspension, an early prototype road scanning suspension, using lidar sensors, based on Active Body Control.

In 2013 the Mercedes-Benz S-Class (W222) introduced the series production version of PRE-SCAN, but with a stereo camera instead of laser projectors. The system dubbed Magic Body Control is fitted with a road-sensing system (Road Surface Scan) that pre-loads the shocks for the road surface detected. Using a stereo camera, the system scans the road surface up to 15 meters ahead of the vehicle at speeds up to 130 km/h (81 mph), and it adjusts the shock damping at each wheel to account for imperfections in the road. Initially only available on 8-cylinder models and above, Magic Ride Control attempts to isolate the car's body by predicting rather than reacting to broken pavement and speed humps.[8][9] The ABC has undergone major modifications for the new S-Class: the wheel damping is now continuously adjustable, the spring strut response has been improved and the pump efficiency has been further enhanced. A digital interface connects the control unit and the sensors, while the fast FlexRay bus connects the control unit and the vehicle electronics. Processing power is more than double that of the previous system.[10]

In 2014 the new C217 S-Class Coupe introduced an update to Magic Body Control, called Active Curve Tilting.[11] This new system allows the vehicle to lean up to 2.5 degrees into a turn, similar to a tilting train. The leaning is intended to counter the effect of centrifugal force on the occupants and is available only on rear-wheel drive models[12][13]

Vehicles

Vehicles, chronological order:

Timeline of active suspension development

References

  1. ^ a b c d e f "Mercedes-Benz S-Class (W220: 1998-2005)". Retrieved 16 November 2021.
  2. ^ a b c CHRIS PERKINS (23 September 2018). "The 2019 Mercedes-Benz GLE 450 Has an Incredible Adaptive Suspension System - The new Mercedes SUV can lean into corners and adjust each wheel's suspension tuning individually and on the fly". Road & Track. Retrieved 16 November 2021.
  3. ^ Mercedes-Benz S-Class, W 220 series (1998 to 2005)
  4. ^ "Mercedes-Benz SL-Class AMG R230 2007-2012 Rear Left OEM HYDRAULIC REBUILD ABC Hydropneumatic Suspension Strut (2303202538)". Rebuild Master Tech. Retrieved 16 November 2021.
  5. ^ . Archived from the original on 2015-03-04. Retrieved 2015-01-08.
  6. ^ "Active Body Control: New Mercedes coupé comes with the very best chassis technology as standard". 2006-09-04. Retrieved 2021-05-19.
  7. ^ . Archived from the original on 2015-01-01. Retrieved 2015-01-01.
  8. ^ Meiners, Jens (May 2013). "2014 Mercedes-Benz S-class: "Effortless Superiority"". Car & Driver. Hearst Corporation. Retrieved 2013-06-07.
  9. ^ (Press release). Daimler AG. 15 May 2013. Archived from the original on 29 October 2013. Retrieved 7 June 2013.
  10. ^ http://media.daimler.com/dcmedia/0-921-1549267-1-1597435-1-0-0-0-0-0-11702-0-0-1-0-0-0-0-0.html 2015-01-02 at the Wayback Machine Suspension: The world's first suspension system with "eyes"
  11. ^ http://media.daimler.com/dcmedia/0-921-1721304-1-1710008-1-0-0-1710107-0-1-12759-614216-0-0-0-0-0-0-0.html 2016-03-04 at the Wayback Machine Under the microscope: Curve tilting function - Curve artist
  12. ^ "How the Active Curve Tilting Feature of the S-Class Coupe Works". BenzInsider.com. 16 February 2014. Retrieved 2 December 2014.
  13. ^ (Press release). Stuttgart, Germany: Mercedes-Benz. 23 June 2014. Archived from the original on 24 December 2014. Retrieved 2 December 2014.
  14. ^ https://www.autoblog.com/buy/2004-Mercedes_Benz-S_Class/review/
  15. ^ "TOYOTA MOTOR CORPORATION GLOBAL WEBSITE | 75 Years of TOYOTA | Technical Development | Chassis". Toyota-global.com. Retrieved 2020-01-15.
  16. ^ "1991 Infiniti Q45a Full-Active Suspension (since mid-year 1990 for North America ) specs review". Automobile-catalog.com. Retrieved 2020-01-15.

External links

  • Mercedes-Benz USA
  • Mercedes-Benz International

March 11, 2023
active, body, control, mercedes, benz, brand, name, used, describe, electronically, controlled, hydropneumatic, suspension, mercedes, benz, class, w220, mercedes, benz, class, c215, mercedes, benz, class, this, suspension, combines, high, level, ride, quality,. Active Body Control or ABC is the Mercedes Benz brand name used to describe electronically controlled hydropneumatic suspension 1 2 Mercedes Benz S Class W220 Mercedes Benz CL Class C215 Mercedes Benz SL Class This suspension combines a high level of ride quality with control of the vehicle body motions and therefore virtually eliminates body roll in many driving situations including cornering accelerating and braking 2 Mercedes Benz has been experimenting with these capabilities for automobile suspension since the air suspension of the 1963 600 and the hydropneumatic fluid and air suspension of the 1974 6 9 ABC was only offered on rear wheel drive models as all wheel drive 4MATIC models were available only with Airmatic semi active air suspension with the 2019 Mercedes Benz GLE 450 4MATIC being the first AWD to have ABC available 2 The production version was introduced at the 1999 Geneva Motor Show on the new Mercedes Benz CL Class C215 3 Contents 1 Description 2 Magic Body Control 3 Vehicles 4 Timeline of active suspension development 5 References 6 External linksDescription EditIn the ABC system a computer detects body movement from sensors located throughout the vehicle and controls the action of the active suspension with the use of hydraulic servomechanisms The hydraulic pressure to the servos is supplied by a high pressure radial piston hydraulic pump operating at 3 000psi Accumulators regulate the hydraulic pressure by means of an enclosed nitrogen bubble separated from the hydraulic fluid by a membrane 1 A total of 13 sensors continually monitor body movement and vehicle level and supply the ABC controller with new data every ten milliseconds 1 Four level sensors one at each wheel measure the ride level of the vehicle three accelerometers measure the vertical body acceleration one acceleration sensor measures the longitudinal and one sensor the transverse body acceleration As the ABC controller receives and processes data it operates four hydraulic servos each mounted on an air and pressurized hydraulic fluid strut beside each wheel 4 Almost instantaneously the servo regulated suspension generates counter forces to body lean dive and squat during various driving maneuvers A suspension strut consisting of a steel coil spring and a shock absorber connected in parallel as well as a hydraulically controlled adjusting cylinder are located between the vehicle body and wheel These components adjust the cylinder in the direction of the suspension strut and change the suspension length This creates a force which acts on the suspension and dampening of the vehicle in the frequency range up to five hertz 1 The system also incorporates height adjustable suspension which in this case lowers the vehicle up to 11 mm 0 43 in between the speeds of 60 160 km h 37 99 mph for better aerodynamics fuel consumption and handling 1 The ABC system also allows self levelling suspension which raises or lowers the vehicle in response to changing load i e the loading or unloading of passengers or cargo 1 Each vehicle equipped with ABC has an ABC Sport button that allows the driver to adjust the suspension range for different driving style preferences This feature allows the driver to adjust the suspension to maintain a more level ride in more demanding driving conditions The reliable function of the ABC system requires a regular hydraulic oil change and filter replacement The Mercedes Benz C112 of 1991 Mercedes Benz Vario Research Car 5 of 1995 and the Mercedes Benz F200 of 1996 already featured prototype versions of ABC The first complete and ready for production version of ABC was introduced in 1999 on the top of the line Mercedes Benz CL Class C215 In 2006 the Mercedes Benz CL Class C216 introduced the second generation Active Body Control suspension referred to as ABC Plus or ABC II in technical documentation This updated suspension reduced body roll by 45 6 compared to the first generation ABC suspension ABC Plus had an updated hydraulic system design with shorter hydraulic lines and the pulsation damper was relocated to be mounted directly on the tandem pump In 2010 a crosswind stabilization function was introduced In strong gusts of crosswind and depending on the direction and intensity of the wind having an effect on the vehicle this system varies the wheel load distribution in such a way that the effects of winds are largely compensated or reduced to a minimum For this purpose the ABC control unit uses the yaw rate lateral acceleration steering angle and road speed sensors of the Electronic Stability Program ESP 7 Magic Body Control EditIn 2007 the Mercedes Benz F700 concept introduced the PRE SCAN suspension an early prototype road scanning suspension using lidar sensors based on Active Body Control In 2013 the Mercedes Benz S Class W222 introduced the series production version of PRE SCAN but with a stereo camera instead of laser projectors The system dubbed Magic Body Control is fitted with a road sensing system Road Surface Scan that pre loads the shocks for the road surface detected Using a stereo camera the system scans the road surface up to 15 meters ahead of the vehicle at speeds up to 130 km h 81 mph and it adjusts the shock damping at each wheel to account for imperfections in the road Initially only available on 8 cylinder models and above Magic Ride Control attempts to isolate the car s body by predicting rather than reacting to broken pavement and speed humps 8 9 The ABC has undergone major modifications for the new S Class the wheel damping is now continuously adjustable the spring strut response has been improved and the pump efficiency has been further enhanced A digital interface connects the control unit and the sensors while the fast FlexRay bus connects the control unit and the vehicle electronics Processing power is more than double that of the previous system 10 In 2014 the new C217 S Class Coupe introduced an update to Magic Body Control called Active Curve Tilting 11 This new system allows the vehicle to lean up to 2 5 degrees into a turn similar to a tilting train The leaning is intended to counter the effect of centrifugal force on the occupants and is available only on rear wheel drive models 12 13 Vehicles EditVehicles chronological order Mercedes Benz C112 Mercedes Benz Vario Research Car Mercedes Benz F200 Mercedes Benz CL Class C215 Mercedes Benz S Class W220 standard on S600 and S55 AMG optional on other trims 14 Mercedes Benz SL Class R230 Mercedes Benz S Class W221 Mercedes Benz CL Class C216 Mercedes Benz SL Class R231 Mercedes Benz S Class W222 Magic Body Control Mercedes Benz S Class C217 Magic Body ControlTimeline of active suspension development Edit1955 Citroen DS had hydropneumatic suspension designed by Paul Mages the first car with height adjustable suspension and self levelling suspension leveraging the fact that gas air absorbs force while fluid transfers force smoothly 1962 Mercedes Benz W112 platform featured an air suspension on the 300SE model and the 1963 Mercedes Benz 600 model 1965 Rolls Royce Silver Shadow licensed technology from the Citroen DS hydropneumatic suspension offering self levelling 1974 Maserati Quattroporte II used the height adjustable suspension and self levelling suspension from the Citroen SM 1975 Mercedes Benz 450SEL 6 9 with fully Hydropneumatic suspension similar in technology but not geometry to Citroen design 1979 Mercedes Benz W126 then new S class had even more sophisticated height adjustable suspension and self levelling suspension 1984 Mercedes Benz W124 selected models of E class had this technology rear only hydraulic suspension height adjustable suspension and self levelling suspension 1985 Bose Corporation founder and CEO Dr Amar Bose Designed a suspension that mixed passenger comfort and vehicle control this system used linear electromagnetic motors power amplifiers control algorithms and computation speed Early 1980s through early 90s Lotus Engineering the consultant branch of Lotus Cars experimented with active suspension layouts combining Electrohydraulic servo valve technology from aerospace a variety of sensors and both analog and digital controllers About 100 prototype cars and trucks and several racing cars were built for a wide variety of customers with variants of the high bandwidth Lotus Active system 1986 Lotus Engineering and Moog Inc formed joint venture Moog Lotus Systems Inc to commercialize the Lotus technology with electro hydraulic servo valves designed by Moog The joint venture was later purchased by the TRW Steering and Suspension Division 1989 Citroen XM had a similar electronic control of hydraulic suspension branded Hydractive 1989 Toyota Celica with Toyota Active Control Suspension 15 1991 Infiniti Q45 was optionally equipped with Full Active Suspension a world first in production automobiles 16 1991 Toyota Soarer had a fully active hydraulic suspension system on the 1991 UZZ32 model Toyota Active Control Suspension 1994 Citroen Xantia ACTIVA variant introduced active anti roll bars as an extension to their Hydractive II suspension 1999 Mercedes Benz CL Class C215 introduces Active Body Control References Edit a b c d e f Mercedes Benz S Class W220 1998 2005 Retrieved 16 November 2021 a b c CHRIS PERKINS 23 September 2018 The 2019 Mercedes Benz GLE 450 Has an Incredible Adaptive Suspension System The new Mercedes SUV can lean into corners and adjust each wheel s suspension tuning individually and on the fly Road amp Track Retrieved 16 November 2021 Mercedes Benz S Class W 220 series 1998 to 2005 Mercedes Benz SL Class AMG R230 2007 2012 Rear Left OEM HYDRAULIC REBUILD ABC Hydropneumatic Suspension Strut 2303202538 Rebuild Master Tech Retrieved 16 November 2021 Mercedes Benz Vario Research Car Daimler gt Technologie amp Innovation gt Einblicke in Forschung amp Entwicklung gt Forschungsfahrzeuge Archived from the original on 2015 03 04 Retrieved 2015 01 08 Active Body Control New Mercedes coupe comes with the very best chassis technology as standard 2006 09 04 Retrieved 2021 05 19 Chassis and suspension Agile steering active suspension adaptive brakes Daimler Global Media Site gt Home Archived from the original on 2015 01 01 Retrieved 2015 01 01 Meiners Jens May 2013 2014 Mercedes Benz S class Effortless Superiority Car amp Driver Hearst Corporation Retrieved 2013 06 07 The new Mercedes Benz S Class The aspiration the best automobile in the world Suspension The world s first suspension system with eyes Press release Daimler AG 15 May 2013 Archived from the original on 29 October 2013 Retrieved 7 June 2013 http media daimler com dcmedia 0 921 1549267 1 1597435 1 0 0 0 0 0 11702 0 0 1 0 0 0 0 0 html Archived 2015 01 02 at the Wayback Machine Suspension The world s first suspension system with eyes http media daimler com dcmedia 0 921 1721304 1 1710008 1 0 0 1710107 0 1 12759 614216 0 0 0 0 0 0 0 html Archived 2016 03 04 at the Wayback Machine Under the microscope Curve tilting function Curve artist How the Active Curve Tilting Feature of the S Class Coupe Works BenzInsider com 16 February 2014 Retrieved 2 December 2014 The new Mercedes Benz S Class Coupe The high end coupe Press release Stuttgart Germany Mercedes Benz 23 June 2014 Archived from the original on 24 December 2014 Retrieved 2 December 2014 https www autoblog com buy 2004 Mercedes Benz S Class review TOYOTA MOTOR CORPORATION GLOBAL WEBSITE 75 Years of TOYOTA Technical Development Chassis Toyota global com Retrieved 2020 01 15 1991 Infiniti Q45a Full Active Suspension since mid year 1990 for North America specs review Automobile catalog com Retrieved 2020 01 15 External links EditMercedes Benz USA Mercedes Benz International Retrieved from https en wikipedia org w index php title Active Body Control amp oldid 1115720637, wikipedia, wiki, book, books, library,

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