INSUBCONTINENT EXCLUSIVE:
The second action of active 4WS is same-phase steering angle input to the rear wheels
Turn the wheel right, and the rear wheels also turn slightly to the right
However, that rear angle is even shallower than the opposite-phase angles in the above scenario
This improves higher-speed stability, like when a driver changes lanes or corners rapidly through fun twisties or on a racetrack
Rear steering angles vary anywhere from 2.5 degrees to 10 degrees, depending on vehicle design and purpose.Four-wheel steering, in hard
partsIn real nuts, bolts, and notoriety, Honda first brought 4WS to modern production in the 1988 Prelude Si as an option
Nissan followed suit with its HICAS system, and Mazda had a system with extremely limited production, but Honda made the biggest splash.The
Honda system was entirely mechanical
It used a shaft connecting the front steering rack to a planetary gear
That gear created the phase (direction) and degree of rear steering indexed to steering wheel input
This shaft led to a sliding rod that acted like the rack of a rack and pinion steering gear, carrying that input to the rear wheels.At small
steering angles, the rear wheels turned a maximum of 1.5 degrees in phase (in the same direction) as the fronts
At larger steering wheel angles above roughly 270 degrees from center, the rear wheels steered as much as 5.3 degrees out-of-phase with the
fronts, tightening the turning circle about 10 percent.
The operating mechanism of the Honda's rear steering box, connecting two
different cranks (one is hidden), that results in different phases using a planetary gear
Honda
The operating mechanism of the Honda's rear steering box, connecting two
different cranks (one is hidden), that results in different phases using a planetary gear
Honda
An early Honda test mule, mating two Accords together
Honda
An early Honda test mule, mating two Accords together
Honda
The operating mechanism of the Honda's rear steering box, connecting two different cranks
(one is hidden), that results in different phases using a planetary gear
Honda
An early Honda test mule, mating two Accords together
Some auto critics, like that most cerebral of British scribes, L.J.K
Setright of Car Magazine, cited that the third and fourth-generation Honda Preludes with 4WS exuded the finest steering in the history of
Weight, feel, accuracy, and telepathic information all sent the auto critic into automotive euphoria.Four-wheel steering, digitally
Only active above roughly 90 km/h (55 mph) and below 200 km/h (125 mph), it used a computer-controlled hydraulic actuator to move the rear
A computer signaled a rear steering rack, allowing toe changes of plus or minus one degree, depending on speed and front steering angle.
