Trailer stability assist

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Trailer Stability Assist (TSA), also known as Electronic Trailer Sway Control, [1] is designed to control individual wheel slip to correct potential trailer swing before there is an accident. [2] Although similar to Electronic Stability Control (ESC), TSA is programmed differently and is designed to detect yaw in the tow-vehicle and take specific corrective actions to eliminate trailer sway. Most ESC systems are not designed to detect such movement nor take the correct actions to control both trailer and tow-vehicle; so not all ESC equipped vehicles have TSA capabilities. [3]

Yaw (rotation)

A yaw rotation is a movement around the yaw axis of a rigid body that changes the direction it is pointing, to the left or right of its direction of motion. The yaw rate or yaw velocity of a car, aircraft, projectile or other rigid body is the angular velocity of this rotation, or rate of change of the heading angle when the aircraft is horizontal. It is commonly measured in degrees per second or radians per second.

Contents

TSA systems detect when a trailer is starting to oscillate while under tow and corrects any dangerous trailer swing through a combination of either torque reduction and/or individual wheel braking to bring the trailer and tow-vehicle back under control. [2] [4] While towing heavy trailers, such as travel trailer, an unwanted wallow of the whole assembly may occur. Without the help of electronics, regaining stability requires focused attention by the driver. [4]

See also

Lane departure warning system mechanism designed to warn a driver when the vehicle begins to move out of its lane

In road-transport terminology, a lane departure warning system is a mechanism designed to warn the driver when the vehicle begins to move out of its lane on freeways and arterial roads. These systems are designed to minimize accidents by addressing the main causes of collisions: driver error, distractions and drowsiness. In 2009 the U.S. National Highway Traffic Safety Administration (NHTSA) began studying whether to mandate lane departure warning systems and frontal collision warning systems on automobiles.

A collision avoidance system, also known as a precrash system, forward collision warning system, or collision mitigating system, is an automobile safety system designed to prevent or reduce the severity of a collision. It uses radar (all-weather) and sometimes laser (LIDAR) and camera to detect an imminent crash. GPS sensors can detect fixed dangers such as approaching stop signs through a location database.

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Semi-trailer truck combination of a tractor unit and one or more semi-trailers to carry freight

A semi-trailer truck is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a fifth-wheel coupling (hitch), with much of its weight borne by the tractor. The result is that both the tractor and semi-trailer will have a distinctly different design than a rigid truck and trailer.

Anti-lock braking system

An anti-lock braking system (ABS) is a safety anti-skid braking system used on aircraft and on land vehicles, such as cars, motorcycles, trucks and buses. ABS operates by preventing the wheels from locking up during braking, thereby maintaining tractive contact with the road surface.

Steering collection of components, linkages, etc. which allows any vehicle to follow the desired course (for directional control)

Steering is the collection of components, linkages, etc. which allows any vehicle to follow the desired course. An exception is the case of rail transport by which rail tracks combined together with railroad switches provide the steering function. The primary purpose of the steering system is to allow the driver to guide the vehicle.

Electronic stability control computerized technology that improves the safety of a vehicles stability by detecting and reducing loss of traction

Electronic stability control (ESC), also referred to as electronic stability program (ESP) or dynamic stability control (DSC), is a computerized technology that improves a vehicle's stability by detecting and reducing loss of traction (skidding). When ESC detects loss of steering control, it automatically applies the brakes to help "steer" the vehicle where the driver intends to go. Braking is automatically applied to wheels individually, such as the outer front wheel to counter oversteer or the inner rear wheel to counter understeer. Some ESC systems also reduce engine power until control is regained. ESC does not improve a vehicle's cornering performance; instead, it helps to minimize the loss of control.

A traction control system (TCS), also known as ASR, is typically a secondary function of the electronic stability control (ESC) on production motor vehicles, designed to prevent loss of traction of driven road wheels. TCS is activated when throttle input and engine torque are mismatched to road surface conditions.

Trailer (vehicle) vehicles that have a loading area but do not have their own drive

A trailer is an unpowered vehicle towed by a powered vehicle. It is commonly used for the transport of goods and materials.

Ford Expedition full-size SUV built by the Ford Motor Company

The Ford Expedition is a Full-size SUV manufactured by Ford. Introduced for the 1997 model year as the successor of the Ford Bronco, the Expedition was the first full-size Ford SUV sold with a four-door body. For its entire production life, the Ford Expedition has been derived from the corresponding generation of the Ford F-150 in production, sharing some body and mechanical components. The fourth-generation Ford Expedition began production for the 2018 model year. Similar to the configuration of the Chevrolet Tahoe and Suburban, the Ford Expedition is sold in regular and extended lengths ; sold since 2007, the latter functionally serves as the replacement for the Ford Excursion.

Electronic brakeforce distribution or electronic brakeforce limitation (EBL) is an automobile brake technology that automatically varies the amount of force applied to each of a vehicle's wheels, based on road conditions, speed, loading, etc. Always coupled with anti-lock braking systems (ABS), EBD can apply more or less braking pressure to each wheel in order to maximize stopping power whilst maintaining vehicular control. Typically, the front end carries the most weight and EBD distributes less braking pressure to the rear brakes so the rear brakes do not lock up and cause a skid. In some systems, EBD distributes more braking pressure at the rear brakes during initial brake application before the effects of weight transfer become apparent.

Honda Ridgeline car model

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Honda Pilot Honda pilot

The Honda Pilot is a mid-size crossover SUV manufactured by Honda and introduced in 2002.

Tow hitch

A tow hitch is a device attached to the chassis of a vehicle for towing, or a towbar to an aircraft nose gear. It can take the form of a tow ball to allow swiveling and articulation of a trailer, or a tow pin, or a tow hook with a trailer loop, often used for large or agricultural vehicles where slack in the pivot pin allows similar movements. Another category is the towing pintle used on military vehicles worldwide.

Dolly (trailer)

A dolly is an unpowered vehicle designed for connection to a tractor unit, truck or prime mover vehicle with strong traction power.

Towing coupling two or more objects together so that they may be pulled by a designated (towing) power source or sources

Towing is coupling two or more objects together so that they may be pulled by a designated power source or sources. The towing source may be a motorized land vehicle, vessel, animal, or human, the load anything that can be pulled. These may be joined by a chain, rope, bar, hitch, three-point, fifth wheel, coupling, drawbar, integrated platform, or other means of keeping the objects together while in motion.

In the automotive industry, brake-by-wire technology is the ability to control brakes through electrical means. It can be designed to supplement ordinary service brakes or it can be a standalone brake system.

Vehicle Safety Technology (VST) in the automotive industry refers to special technology developed to ensure the safety and security of automobiles and passengers. The term encompasses a broad umbrella of projects and devices within the automotive world. Notable examples include car-to-computer communication devices which utilize GPS tracking features, geo-fencing capabilities, remote speed sensing, theft deterrence, damage mitigation, and vehicle-to-vehicle communication.

Vehicle Dynamics Integrated Management

Vehicle Dynamics Integrated Management (VDIM) is an integrated vehicle handling and software control system developed by Toyota. It involves an omnibus computer linkage of traction control, electronic stability control, electronic steering, and other systems, with the intent of improving responsiveness to driver input, performance, and overall safety. The system was first introduced in the Japanese domestic market in July 2004, when Toyota debuted VDIM on the Toyota Crown Majesta. This was followed by the VDIM's export debut on the third generation Lexus GS, which was launched in 2005. VDIM integrates the company's Electronically Controlled Brake (ECB), Anti-Lock Brakes (ABS), Electronic Brakeforce Distribution (EBD), Traction Control (TRC) and Vehicle Stability Control (VSC) active safety systems with the Adaptive Variable Suspension (AVS), Electric Power Steering (EPS) and Variable Gear Ratio Steering (VGRS) systems which previously worked independently using proprietary software. This way all the systems function together rather than the ECU prioritizing which is the most important. VDIM was initially designed for rear-wheel drive cars.

Honda Advanced Technology is part of Honda's long-standing research and development program focused on building new models for their automotive products and automotive-related technologies, with many of the advances pertaining to engine technology. Honda's commitment to pursuit of ideas and exploration of technological challenges has led to practical solutions ranging from fuel-efficient vehicles and engines, to more sophisticated applications such as the humanoid robot, ASIMO, and the Honda HA-420 HondaJet, a six-passenger business jet. Honda Advanced Technology emphasizes environmental sustainability, safety and advanced mobility.

Nira Dynamics AB

NIRA Dynamics AB is a Swedish company focusing on research and development of signal processing and control systems for the automotive industry. It supplies automotive original equipment manufacturers (OEMs) and suppliers in Europe, North America, Latin America, and Asia with its products and systems. In 2015, the number of vehicles equipped with NIRA's main product, TPI, exceeded the benchmark of 15,000,000.

SEAT Leon X-PERIENCE car

The SEAT Leon X-PERIENCE is a compact SUV based SEAT León ST produced by SEAT, a Spanish automobile manufacturer and member of the Volkswagen Group. It is the latest addition to the family of the SEAT León, SEAT’s range of sporty hatchbacks. The first model was released by SEAT in the autumn of 2014 at the Paris Motor Show.

References

  1. Trailer Sway Control Demonstration, srwhite Channel on YouTube, dated 22 September 2006, last accessed 20 January 2017
  2. 1 2 Trailer Stability Assist, Honda New Zealand, last accessed 11 December 2016
  3. TRAILER STABILITY, Right Connections (UK), last accessed 11 December 2016
  4. 1 2 Trailer Stability Assist, Skoda Vehicles, last accessed 11 December 2016

External references