Bumper bullbar or thrust (also the roo bar or nudge bar in Australia, bumper moose in Canada, and pushbar , bull bars , brush protectors , guard grids or cattle drivers in the United States) mounted on the front of the vehicle to protect its front from a collision, whether accidental collisions with large animals on rural roads, or deliberate collisions with other vehicles in police use. They range in size and shape, and usually consist of welded steel or aluminum pipe, or, more recently, polycarbonate and polyethylene molded materials. The "male bull" in its name refers to cows, which in rural areas sometimes roam the country roads and highways.
Research has shown that the use of bull bars increases the risk of death and serious injury to pedestrians. This is because the blade of the bull is stiff, so it transmits all the power to the pedestrian, unlike the bumper that holds the force and squeezes. Due to the number of deaths and injuries caused by rigid car fronts, often with metal bumpers (2,000 deaths and 18,000 serious incidents per year in Europe, according to official studies in the UK), sales of new metal propellers that do not comply with the EU Directive are banned. However, in the United Kingdom the sale and repair of used rods manufactured prior to 2007 or the use of pre-2007 bars have been installed allowed under current MOT guidelines: "Not illegal for vehicles equipped with bull bars, though the Department would not recommend their fitment unless indicated, through compliance with prescribed safety standards, that they do not pose any additional risk of injury to pedestrians or other vulnerable road users.No plan for legislation to require a bull bar that is fitting to be removed. "
Video Bullbar
Design and terminology
Where cattle are more prominent and where larger four-wheel drive vehicles are used, drivers use larger steel propellers.
Brushbars (or bush bars) are similar to bullbars, often integrated into a bull bar design. They protect the front of the vehicle, especially the headlights, from the brush and small trees.
"Nudge bars", another type of bullbar, are generally installed on sedans and small SUVs, and consist of lightweight aluminum or polycarbonate tubes that only protect the radiator grille and area without replacing the bumper blades. Bullbars usually replace the front bumper or fender, so most require an indicator light.
Bullbars are sometimes used as a platform to install floodlights and vehicle recovery cranes. Radio antennas for equipment such as CB radios are often fitted to bullbars, although roof mounting provides better performance.
Bullbars incorporating winches are often known as "bumper winches", especially in the UK where bullbars selling that do not meet European standards, as mentioned above, are banned since 2007. However, the law is not retrospective, and frontal steel system protection can still legal, for example when combining a winch installation.
As a security feature, the traditional bar is built to protect the vehicle, which is considered less secure than allowing controlled deformation to absorb kinetic energy during a collision. Modern designs of bullbars and roo bars have advanced, so some vehicle manufacturers and aftermarket companies now offer impact bars that integrate with vehicle security systems, such as the activation of airbags after a collision with a bullbar. Plastic trays made of materials such as polyethylene are designed to act like springs and deflect due to the collision force so that the vehicle can still be ridden after hitting an animal. This design is more "pedestrian-friendly" than the same vehicle without the bullbar.
There are many aspects related to proper bemo construction. It is widely accepted that the section of the channel providing power for the protection system must be constructed from a single piece of material and free of parts that are bolted or welded together. Material thickness is something to consider when choosing a bullbar, generally the thicker the material, the stronger the product provides greater protection. Material classes are also important, products made of steel or zinc/structural alloys are stronger than standard alloys or polymer products.
Lately, bumpers have become popular as well as cosmetic accessories, especially in larger four-wheel vehicles and Sports Utility Vehicles (SUVs). The study and media attention to them and their role in increasing pedestrian deaths led to an agreement with the EU among car makers not to install it on new vehicles starting January 1, 2002. This was followed by a full EU ban on the sale of rigid bullbars (for example, by artisan aftermarket). Vehicles that already have them installed before the ban remain legal.
Police use
A push bumper or nudge bar is mounted on the car's chassis and is placed to add front bumper, to allow the car to be used as a bat for simple structures or fences, or to push defective vehicles out of the way.
Bumper Pateruit Intervention Technique (PIT) is attached to the front frame of the patrol car. It was designed to end the pursuit of a vehicle by turning the escaped vehicle by poking into the rear quarter panels. Cars that are not equipped with PIT Bumper can still try PIT maneuvering which risks increasing front-end damage and possible defects if maneuver fails and pursuit continues.
Bullbars are installed using the same mounting holes on the front of the truck or SUV used to install snowplows, hooks, and other accessories. Hanging installation requires a lower set of brackets, while installing larger lattice shields, such as brushes, may also require top mounting brackets. Some bullbars may cover the front of the vehicle. In this case, special number plates can be used to relocate and ensure proper visibility.
Maps Bullbar
Australia
Kangaroos are a major road safety hazard in Australia, hence the alternative name "roo bar". Kangaroos are responsible for more than 60% of collisions between vehicles and animals in Australia; the next most common breed of dog is 12%. The high incidence of animal attacks is why roo bars are most often installed for vehicles in Australia in the interior or rural areas.
Over the last few years there has been debate in Australia about the security implications of propeller mounting, especially as four wheels and their accessories become increasingly popular in urban areas. The use of bullbars in urban areas was criticized by cycling and pedestrian organizations.
Bullbar producers in Australia must comply with Australian standards AS47861.1/2002. In some countries it may be illegal to drive vehicles equipped with bullbells that are inconsistent with Australian Design Rules (ADRs). The main ADR requirement that applies to bullbars is the clause in ADR 42/xx (where xx denotes the version number), which states (in part) that:
No vehicles equipped with objects or fitting, not technically important for the vehicle, stand out from every part of the vehicle and thus likely increase the risk of bodily injury to a person.
These requirements are not specifically intended for bullbars but effectively prescribe requirements for their construction. ADR 42/00, the first version of this rule, applies to vehicles built from July 1988. Australian Standard AS4876.1-2002 Motor vehicle frontal protection system Part 1: Road user protection was released in 2002, and apply the construction rules for all bumper manufactured since that date, regardless of the age of the vehicle they fit. Similar requirements for older vehicles that are installed with bullbars made before the Australian Standard are exercised only in state laws.
In 2003, New South Wales State Parliament Member Anthony Roberts suggested there is little or no enforcement of ADR requirements and Harold Scruby (Australian Pedestrian Council) has proposed that modern standards should be made retrospectively.
Bullbars are not allowed to cause vehicles to fail to comply with other ADRs that were originally built. This includes the visibility of lights, such as headlamps and indicators; but specifically related to ADR 69/00, the rules for full frontal impact protection . To comply with this rule, bullbars produced for vehicles equipped with SRS (airbag systems) should be tested for compatibility with airbag systems.
See also
- Cowcatcher
- Road kill
- Automotive security
- Cuisine Roadkill
References
External links
- Vehicle registration standard, New South Wales Road and Traffic Authority
- Water Bag Testing and Compatibility - East Coast Bullbars
Source of the article : Wikipedia
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