Honda Accord Euro, Technical Product Book

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The Honda Accord Euro
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New for the latest generation of Accord is an additional safety system known as Motion Adaptive EPS in
which the VSA, working in conjunction with the Electric Power Steering system, initiates steering pulses
to prompt the driver to steer intuitively.
At its simplest level, VSA has a traction control function whereby it detects wheel slip under acceleration
and coordinates the use of braking and engine torque to regain traction. In situations where the driven
wheels are on surfaces with different levels of traction, such as a partially wet road surface, the system
applies braking action to the wheel that's slipping, allowing the tyre with better grip to move the vehicle.
In addition, the system reduces engine output to minimise wheelspin.
By monitoring input from a series of vehicle sensors, VSA calculates a predicted range of vehicle response
while constantly monitoring the vehicle's actual response and the driver's control inputs. If the actual
response is outside the predicted response range, as when cornering forces exceed the tyres' performance,
VSA automatically intervenes with corrective action.
In the case of oversteer (which may lead to a spin), VSA applies braking to the outside wheels to counter
the yawing tendency. On the other hand, if understeer is detected, VSA applies braking to the inside wheel
and reduces engine power to turn the car back on to the intended course.
An indicator light flashes on the instrument panel while the system is actively enhancing the stability of
the vehicle. A cockpit switch to the side of the instrument panel is provided to disable the VSA.
Motion Adaptive EPS
A stability system which automatically initiates steering inputs aimed at prompting the driver to steer in
the correct direction in situations where the car is threatened with instability is the latest addition to
Honda's dynamic safety systems armoury. Called Motion Adaptive EPS, it relies on the integration and
networking of the VSA and EPS systems and is standard on Accord Euro models.