Synthesis of energy­efficient acceleration control law of automobile

The Influence of the Driving Speed and Vertical Acceleration of the Mobile Machine on the Change of Soil Packing

“…To simplify the use of a mathematical device, the load impacts of the wheel propulsion on the soil can be represented as periodic (harmonic) that arise when moving on aligned fields. When calculating the dynamic loads from the wheel to the soil, we assume that the loads are harmonic in nature [13,14]. At the initial moment of tractor driving, the shock loads from the wheel to the soil appear due to the wheel falling from a certain height of the roughness, at the same time, at the initial moment of time (t=0), the mechanical stresses increase by a jump from zero to the maximum of m  , and then changes according to corresponding equations…”

Development of the method for estimating the inertia radius relative to the vertical axis of the car

“…The data is distributed according to the normal law. We use the quantile for normal distribution of the composition of two random variables -inertia radius for experimental and theoretical by certain [10] …”

Evaluation of Power Indicators of the Automobile Engine

“…To estimate the dynamics of vehicle acceleration, the acceleration characteristic of the engine is shown in work [15], indicating the change in the effective power N e and the effective torque M e of the engine, depending on the angular velocity of the crankshaft during acceleration of the car. The effective torque of the engine is determined by the following relationship [15] (14) where u тр is the total transmission ratio; η tr is the transmission efficiency; r d is the dynamic radius of the wheel; m a is the gross vehicle weight; g is acceleration of gravity; φ is the coefficient of traction of wheels with the road; К tr is the coefficient of coupling weight use; k•F is the air resistance factor; δ is the coefficient of accounting for rotating masses of the engine and transmission; S x is relative slipping; n is the angular velocity of the engine crankshaft; ψ is the total coefficient of road resistance. Effective engine power [15]     .…”

“…Expressions (14) and (15) do not take into account the change in the coefficient of adhesion depending on the linear speed of the car. In work [5], a number of approximating dependences for the determination of  (V) are proposed; some of them are given in Table. 1.…”

“…The author of work [14] proposed a technique for carrying out the qualimetry of vehicles based on the kinetic energy used for the movement of cargo, taking into account the design features of the vehicle. However, this technique does not take into account the dynamic properties of cars, which are manifested during acceleration.…”