2006-10-17 04:37:16 · 4 answers · asked by dinesh s 1 in Science & Mathematics ➔ Engineering
Four wheel steering is a relatively new technology that improves maneuverability in cars, trucks and trailers. It should not be confused with four wheel drive in which all four wheels of a vehicle are powered.
In standard two wheel steering vehicles, the rear set of wheels are always directed forward therefore and do not play an active role in controlling the steering. In four wheel steering systems, the rear wheels can turn left and right. To keep the driving controls as simple as possible, a computer is used to control the rear wheels.
most four wheel steering systems can control the rear wheels in the following fundamental ways:
At slow speeds, the rear wheels are turned in the opposite direction of the front wheels. This can lessen the turning radius by approximately 20%.
At faster speeds on the highway, the rear wheels are turned in the same direction as the front wheels. This improves lane changing maneuverability and is particularly beneficial for vehicles towing a trailer.
Power steering aims to make steering less strenuous for the driver. There are two types of power steering systems—hydraulic and electric/electronic. There is also a hydraulic-electric hybrid system possible.
A hydraulic power steering (HPS) uses hydraulic pressure supplied by an engine-driven pump. Electric power steering (EPS) is more efficient than the hydraulic power steering, since the electric power steering motor only needs to provide assist when the steering wheel is turned, whereas the hydraulic pump must run constantly. In EPS the assist level is easily tunable to the vehicle type, road speed, and even driver preference. An added benefit is the elimination of environmental hazard posed by leakage and disposal of hydraulic power steering fluid.
2006-10-17 08:51:02 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The transmission fluid in an “N”:-series tractor lubricates the transmission, differential, rear wheel bearings, PTO and hydraulic pump drive, and it also cats as the working fluid for the hydraulic lift. In 9N/2N models, it also lubricates the steering sector and shaft system.
2006-10-17 05:56:17 · answer #2 · answered by veerabhadrasarma m 7 · 0⤊ 0⤋
truly large body! The crude unique declaring replaced into "She is outfitted like a brick Sh** residing house". That replaced into in a time at the same time as maximum outhouses were of weathered timber and a brick one replaced into part of splendor.
2016-12-04 22:20:42 · answer #3 · answered by hausladen 4 · 0⤊ 0⤋
This should explain it --> http://auto.howstuffworks.com/steering4.htm
2006-10-17 04:50:52 · answer #4 · answered by DanE 7 · 0⤊ 0⤋