SSANGYONG RODIUS 2004.09 Manual page 464

10-3
4892-01
4892-01
ABS SYSTEM
1. GENERAL INFORMATION
The aim of the ABS is to mmaintain steerability and driving stability and to take the burden off
the driver. If the stopping distance is shorter on some road surfaces (carriageway conditions),
this is a gift of physics and not a development aim. ABS is a device which senses that one or
more of the wheels are locking up during braking. It monitors the rotational speeds of the
wheels and reduces hydraulic pressure to any wheel it senses locking up. It is controlled by
both mechanical and electronic components. When you apply the brakes, the ABS will regulate
the flow of brake fluid being delivered to the brake calipers. By the use of electronic computers,
the brakes rapidly alternate (at a rate of 30 times per second) from full pressure to full release.
1) Driving Physics
To give you a better understanding of the tasks and functions of ABS, we will first look at the
physics principles.
(1) The Stopping Distance
The stopping distance depends on the vehicle weight and initial speed when braking starts.
This also applies for vehicle with ABS, where ABS always tries to set an optimum brake force
on each wheel. As great forces are exerted between the tires and the carriageway when
braking, even with ABS the wheels may scream and rubber is left on the road. With an ABS
skid mark one may be able to clearly recognize the tire profile. The skid mark of an ABS vehicle
does not however leave any hint of the speed of the vehicle in the case of an accident, as it can
only be clearly drawn at the start of braking.
ABS
RODIUS 2004.09