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One effective solution to prevent speeding in com-
mercial vehicles is to equip them with a road speed lim-
iter system, which restricts maximum road speed to 
the required speed limit without loss of engine power.  

This is realized by limiting the required fuel demand ac-

cording to a set speed limit. The maximum speed  
limit is set using an electronic control unit.

Information about the current speed of the vehicle is 
measured with a speed sensor that supplies an elec-
tronic speed signal to the control unit. The control unit 
limits the fuel output in different ways, depending on 
the fuel injection technology of the engine. In addition 
to its main function, limiting the maximum speed, the 
system offers a variable speed limiter as an option. The 
driver can activate this feature below the maximum 
speed limit in areas with lower speed limits. 

Furthermore, the speed limiter includes additional 
speed limit inputs to preprogram smaller speed limits 
than the maxi mum speed. This functionality can be 
used to prevent fast driving if any special function in 
the vehicle is activated (like open doors on a city  
bus or people on the platform in the back of a garbage 
truck).

Содержание ROAD SPEED LIMITATION -

Страница 1: ...Road speed limitation for commercial vehicles www vdo com...

Страница 2: ...80 years And the requirements are constantly changing Increasingly heavier traffic the ever de creasing availability of raw materials and our increas ing sense of safety and environmental awareness me...

Страница 3: ...3 General information 4 Technical conditions 6 Legal requirements 7 Solutions 8 Advantages 10...

Страница 4: ...long axle ratio attainable speeds for trucks are currently much higher than the speed limits on highways and secondary roads in many countries Excessive speed in trucks has numerous conse quences inc...

Страница 5: ...signal to the control unit The control unit limits the fuel output in different ways depending on the fuel injection technology of the engine In addition to its main function limiting the maximum spee...

Страница 6: ...e regulated with a mechanical throttle pedal which converts the mechanical pedal position to an electrical signal and transmits it via an electrical wire to an electronic control unit The control unit...

Страница 7: ...r to make corrections Legal requirements Technical Requirements System requirements System approval Testing Requirements Regular vehicle checks On road monitoring by police Roadworthiness approved bod...

Страница 8: ...th standard engine manage ment system This makes Pedal Interface II suitable for use on nearly all types of vehicles It can be config ured by authorized personnel to meet the needs of a wide range of...

Страница 9: ...limit By pressing the variable speed limiter switch the driver can choose any speed within this range and the con troller limits the speed according to the driver s de mand Alternatively the unit can...

Страница 10: ...pollutant emissions Driver is able to devote full attention to the traffic environment because there is no need to monitor speed visually Easy installation of retrofit systems More than 30 years expe...

Страница 11: ...itoring with and without Road Speed Limiter Road Speed Limiter 90 KPH Current Limit KPH 140 120 100 80 60 40 20 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Time in sec Speed in KPH Road Speed 140 120...

Страница 12: ...actual use or which may change as a result of further development of the products This information is merely a technical description of the product This information is not meant or intended to be a sp...

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