Given the likely adhesion conditions, the powertrain will drive all axles.
Suspension geometry design and assessment
Steering design
Turning circle
When the vehicle is cornering, each wheel must go through a turning circle. The outer turning circle, is to our main subject of interest. This calculation is never precise because when a vehicle is cornering the perpendiculars via the centres of all wheels never intersect at the curve centre point (Ackermann condition). Additionally, while the vehicle is moving, certain dynamic forces will always arise that will eventually affect the cornering manoeuvre (MAN,2000).
The formula used.
Vehicle Model T31, 19.314 FC
Wheelbase lkt = 5000 mm
Front axle Model V9-82L
Tyres 315/80 R. 22.5
Wheel 22.5 x 9.00
Track width s = 2058 mm
Scrub radius r0 = 58 mm
Inner steer angle ?i = 50.0°
Outer steer angle ?a = 30°30' = 30.5°
1. Distance between steering axes
Calculations 17 lkt
Outer turning circle j js a0 I r0
r0 r0
TDB-172
j = s - 2r0 = 2058-2 58
j = 1942
Therefore
Theoretical value for outer steer angle
3. Steering deviation
4. Turning circle radius
Axle load calculation
Performing an axle load calculation
To optimise the vehicle and achieve the correct superstructure ratings, an axle load calculation is essential. The body can be matched properly to the truck only if the vehicle is weighed before any body building work is carried out. The weights obtained in the weighing process are to be included in the axle load calculation. The following section will explain an axle load calculation. The moment theorem is used to distribute the weight of the equipment to the front and rear axles. All distances are with respect to the theoretical front axle centreline.
Weight is ever used in the sense of weight force (in N) in the following formulae but in the sense
Braking and dynamics control
The braking system will comprise of the following components;
Parking/Secondary Piston
Service/Retarding Piston
Friction Discs
Steel Plates
Actuating Springs
Cooling Oil in
Cooling Oil Out
It will be...
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