Traction diagram

The traction diagram named after Alfred Jante (after Jante) or Jante normal driving diagram or normal driving state diagram shows the course of driving resistances and their sum and the course of the driving force as a function of the driving speed. It has established itself in the specialist literature and is becoming also often used in reviews.

In order for a motor vehicle to be able to drive on a road, it must overcome various resistances . The drive force transmitted from the drive wheels to the road surface must have a certain ratio to the sum of the driving resistances. If it is larger, it is accelerated, if it is smaller, the motor vehicle loses speed.

Often the drive force curve is only shown for full load in the individual forward gears. An excess of force compared to the total driving resistance for the plane indicates the motor vehicle's ability to negotiate inclines without losing speed.

This diagram is also meaningful for the selection of gear ratios ("gentle gear" or "sporty gait").

As a formula this means:

${\ displaystyle F_ {A} = F_ {WR} + F_ {WS} + F_ {WL} + F_ {Wa},}$

in which:

${\ displaystyle F_ {A} =}$ Driving force

${\ displaystyle F_ {WR} =}$ Rolling friction force

${\ displaystyle F_ {WS} =}$ Incline resistance

${\ displaystyle F_ {WL} =}$ Drag force

${\ displaystyle F_ {Wa} =}$ Acceleration resistance

literature

Alfred Jante: Appropriate representation of characteristic diagrams for vehicle engines and vehicles . In: Automobiltechnische Zeitschrift . 39: 326-328 (1936).

Web links

Example of a diagram for 15 different slopes