Results for area 12.4 System states
state in which direct access for activation of “ACC active state” is disabled
state in which the system controls the clearance to the target vehicle according to the selected time gap
direct access for activation of FSRA active state is disabled
state in which the system controls the clearance to the target vehicle according to the selected time gap
state in which the system is active during subject vehicle standstill
system is switched on and the activation criteria are met
system is switched on but the activation criteria are not all met
system is switched off
system is switched on
function that allows the subject vehicle to follow a forward vehicle in low speed ranges such as congested traffic at an appropriate distance by controlling the engine and/or power train and the brakes
temporary target-lost period during a transition to the next target vehicle
condition where the system controls the subject vehicle to be kept stationary
provides the driver information on the specific distance between the subject vehicle and the obstacle
urgent indication to the driver of an imminent threat (collision) with an obstacle
indication presented to the driver that the ERBA system has completed its state transition from OFF (or standby) to ON and is now ready for operational use
NOTE The method of presentation of this indication may be visual or audible or any combination so desired by the system designer.
vehicle systems meeting the requirements of ISO 22839 that assess the likelihood of a collision between the front of the subject vehicle (SV) and the rear of a target vehicle (TV), and when such a collision is very likely, activates the brakes automatically to reduce the relative speed at which the SV and TV may collide
minimum FVCMS deceleration that the system must achieve while mitigation braking (MB) is active, measured on smooth, dry, clean pavement
FVCMS countermeasure that responds to the detection of a very likely rear-end collision by automatically activating braking to quickly reduce the relative velocity, within the minimum requirements
SRB FVCMS countermeasure that reduces the subject vehicle speed by activating the brakes allowing the driver time to analyse and respond to a potential collision, which may have the additional effect of drawing driver attention to hazards ahead of the subject vehicle (SV)
action of transitioning the system operation from a quiescent mode to an active one in which the system is monitoring the monitoring ranges, evaluating the objects detected and generating appropriate feedback to assist the driver
system that drives the vehicle without the driver being in the vehicle control loop, e.g. without a hand on the steering wheel or feet on the pedals failure mechanical or electronic malfunction which causes a persistent loss of performance or function
NOTE 1 to entry: Temporary performance reductions, for example due to bad weather conditions, bad lane markings, or temporarily occurring sensor blindness, are not considered a failure.
alarm that is issued when the warning conditions have not been fulfilled
the blind spot warning function is defined as a function that detects the presence of target vehicles in one or more of the adjacent zones and warns the subject vehicle driver per the requirements given in ISO 17387.
information that the system gives to the driver indicating the need for urgent action to avoid or reduce the severity of a potential rear end collision with another forward vehicle
NOTE 1 to entry: This warning is issued in the advanced stages of a dangerous situation to warn the driver of the need to perform emergency braking, lane changing or other emergency manoeuvres in order to avoid a collision.
indication of system status
NOTE Examples of status indication are on/off, failure and incapable.
state of the system in which it is unable to warn the driver of a lane departure due to temporary conditions
driver action to convey to the system the intention of placing the subject vehicle in motion
EXAMPLE Operation of the accelerator pedal and operation of a switch for starting the subject vehicle.
is a mechanical or electronic malfunction which causes a persistent loss of performance or function
NOTE Temporary performance reductions, e.g. due to bad weather conditions, bad lane markings or temporarily occurring sensor blindness are not a failure.
collision between the subject vehicle (SV) and a forward vehicle (FV)