A promising direction in developing up-to-date transport vehicles is the use of transmissions, an essential element of which is a dual-clutch. Improving functional performance, energy efficiency, and environmental friendliness are relevant and require appropriate research. The object of study is a dry dual-clutch working with a manual transmission with high energy efficiency. In the proposed design scheme, a rotary lever and a movable carriage can change the structural diagram of the force interaction between the pressure spring and the clutch discs. The developed mathematical model of the clutches control mechanism allowed for analyzing the process of controlling the dual-clutch transmissions (DCT) and obtaining functional dependencies between pushing forces in friction pairs and the carriage position. As a result, a method for synthesizing DCT was proposed to ensure the transmission of a given torque. Furthermore, it was determined and numerically proven that the same radial movement of the carriage when switching-on the clutches does not guarantee equal loading for the frictional discs of each clutch. This fact increases the uneven dynamics of torque and disc wear. Overall, the synthesis of the energy-saving dry dual-clutch control mechanism providing the same clutch margin for each clutch was developed. The method can be generalized and applied to designing dry dual-clutch transmissions for machines of various purposes.

The work presents simulation models of the control and monitoring system, the study of the dynamics of the parameters of the elements of a hybrid car using simulation modeling in Matlab / Simulink environment is performed. A series-parallel drive of driving wheels is considered. The electric drive is carried out from an asynchronous electric motor. The model includes energy consumption regulation and control subsystems, calculation and state control of the battery, internal combustion engine, electric drive, mechanical model of the car, simulator of driver's influence on the fuel pedal, driving mode control system. The changes in the operating parameters of the hybrid vehicle components and the vehicle itself on the given driving modes are presented. The results obtained correspond to the real values for the selected class of cars.

The article provides a search and analysis of the design parameters of disc brake mechanisms that provide regulated braking efficiency and wear resistance of friction pairs in order to increase their durability. To assess the relative wear of the friction surfaces of the disc brake mechanisms of passenger cars, an assessment was made of the parameters that can characterize the wear of the interface. On the example of Lanos passenger cars, the possibilities of prospects for further calculation of the coefficients of wear resistance of materials of friction bodies using generalized mathematical models, such as a model of wear of friction pairs of disc brakes, including the design parameters of friction surfaces, the magnitude of the drive pressure, the initial braking speed of the car and the braking time, are considered. wear occurs

The issue of improving the numerical-analytical method of modeling transient processes in the power transmission of a militarytracked vehicle MTV is under consideration. The results of the numerical modeling of dynamic processes in the MTV power transmission using the example of the T-64B in its acceleration mode on a flat concrete track show the significant mutual influence of the power transmission elements and the need to consider the specified processes in the closed system "environment-machine-driver". The proposed method of analytical modeling of the operation of the MTV power transmission allows you to take into account the features of the driver's control of the machine's movement, investigate the operation of the engine control system, analyze the operation of the friction devices of on-board gearboxes, evaluate the performance of the machine's components and transmission units. Ways of improving the methodology of researching transient processes in the power transmission of MTV are given. Based on the research results, the effectiveness of the proposed dynamic research methodology and its extension to other similar research objects have been established.

The article provides a generalized overview of approaches to reducing the number of technological transitions when reducing the production of bent profiles. In particular, various methods of producing bent profiles are considered, taking into account the requirements for the final product. The calculation of calibration of the production of trough profiles according to two calibration schemes has been developed. This calculation allows for an efficient production process of bent profiles and helps to reduce the number of technological transitions required to achieve the desired result. The production of a trough profile was modeled and graphs illustrating the profile manufacturing process were created. This made it possible to visualize various aspects of the technological process and find out which methods and calibration schemes are most effective for achieving the goal. Based on the data obtained, reasonable conclusions were drawn. These conclusions indicate which approaches and methods for producing bent profiles are optimal when reducing the number of process transitions. The results of the study can be useful for industrial enterprises engaged in the production of bent profiles, helping them to choose the most effective methods and calibration schemes to improve the production process and reduce costs.