To describe a mathematical method to quantitate values of the transmitting pressures from the tires to the road, in order to balance them in a car departure during a revolving by applying the independent dynamic camber angles to the cantilevers.
SAE-PP-00245
03/15/2022
- Content
- Presenting method quantitates the distribution of the transmitting pressures on each tire’s contact patch while a car’s body confronts with a sudden change in its Center of Gravity point. we can apply the method to make the problem of car departure safer, approximate neutralization or at least that’s value decrease, in times of the car’s revolving even though the changes increase too much as far as one specified wheel may be elevated from the road . The C.G changes can be caused by applying the command angle and the acceleration or braking force simultaneously. the parameters of distributing vertical forces, areas of the contact patches, and finally the resulting physical pressures on each tire, are formulated and analyzed to obtain efficiency factor of the method ‘s operation to the aim of departure neutralization, based on the decreasing in the tires’ contact patch area. a plane calling as ‘balance plane’ is introduced to describe the car stability, inspired by the 2D cartesian coordinates. axes of departure and overturning, that are drawn perpendicular to each other, are formed based on the plane. the balance plane of a car indicates to the momentary C.G points of the rotating car, which are as intersection point of departure and overturning vectors of the C. G changes in the balance plane. How to taking the position of the changed C.G point will be demonstrated based on the dual-deafferentation of heights of the springs between connected and un-connected wheels, that logically forms the axes’ concept of overturning and departure respectively. method uses the independent increasing camber angles in order to solve the departure problem, to decrease the contact patch area, by balancing the pressures related to a specified criterion wheel, that the most transferring vertical weight force will be allocated to its hypothetical area on the plane.
- Citation
- Maleki, M., Ghonjizadeh Samani, A., and qazanfari nezhad, a., "To describe a mathematical method to quantitate values of the transmitting pressures from the tires to the road, in order to balance them in a car departure during a revolving by applying the independent dynamic camber angles to the cantilevers.," SAE MobilityRxiv™ Preprint, submitted March 15, 2022, https://doi.org/10.47953/SAE-PP-00245.