How to Choose the Refueling of New Energy Vehicles under Swapping Vs. Charging Mode: From the Consumers’ Perspective

Background: Battery charging mode is a prevalent method of transshipping power to new energy vehicles. Unfortunately, due to the limited capacity of batteries, typical new energy vehicles can only travel for approximate 350 miles on a single charge and require hours to be recharged. Battery swapping mode, as a novel alternative, can offer ideal solutions by depleted batteries being exchanged for recharged ones at swapping stations in the middle of long trips, thus will inevitably influence potential consumers’ purchase behaviors accordingly.Methods: To examine the impact of swapping mode and charging mode on consumers’ purchase intention, this paper examines a duopolistic market consisting of two new energy vehicle makers (i.e., new energy vehicle maker with swapping mode and one with charging mode), who adopting swapping mode and charging mode to service consumers, respectively. Considering swapping mode characterized with low initial investment and ease of use for consumers, the new energy vehicle makers with charging mode, capitalize on battery extended warranty service in response to rivals’ utilization of swapping mode, thereby non-cooperative game models are formulated, in which government subsidies are taken into account, both the optimal production decision for the new energy vehicle maker with swapping mode maker and one with charging mode are analyzed under three scenarios: without extended warranty service, with extended warranty service, and with extended warranty service and subsidy.Results: The results show that two makers’ market dominance relies on the ratio of the swapping station’s convenience to the extended warranty service and the valuation incremental rate. Additionally, we also find that the government subsidy can dramatically improve the performance of the new energy vehicle maker with swapping mode at the initial stage, but if the subsidy is insufficient size at the sequent stage, this will lead to policy failure and inefficiency in propelling the diffusion of swapping mode.Conclusions: The emerging swapping mode technology is a promising innovative one in boosting new energy vehicle diffusion, which will supplement to charging mode, thus reduce climate change dramatically

Identification of factors that differentiate motor vehicles that have experienced wear or failure of brake system components during the warranty service period

The paper focuses on issues related to selected automotive brakes with the aim of applying the proposed methodology to other structural systems of this type. The main aim of the paper is to identify the factors that differentiate the course of wear and occurrence of a fault in brake system components of passenger cars and light commercial vehicles during the warranty service period. The following methods were used in this study: systematic literature review, process analysis, and descriptive and inferential statistics, including analysis of variance and multiple classification analysis. As a result of an analysis of 295 brake system repairs, six differentiating factors that allowed for ex post analysis of the repairs were identified. An analysis of the interaction of these factors made it possible to distinguish three groups of motor vehicles depending on the cause of failure of the braking system. Based on the data generated in the warranty process, it is possible to determine the factors that differentiate the occurrence of a fault and the course of brake disc and pad wear.

Fatigue Analysis of Actuators with Teflon Impregnated Coating—Challenges in Numerical Simulation

Actuators are essential components for motion in machines, and warranty service lives are basic specifications of actuators. However, fatigue damage or wear of actuators are very complex and related to many design factors, such as materials properties, surface conditions, loads, and operating temperature. Actuator manufacturers still rely heavily on physical experiments to determine the fatigue lives of actuators. This paper investigates the state-of-the-art of using numerical simulations for fatigue analysis of mechanical actuators. Failure criteria of machine elements are discussed extensively; existing works on using finite element methods for machine element designs are examined to (1) explore the feasibility of using a numerical simulation for fatigue analysis and (2) discuss the technical challenges in practice. Moreover, a systematic procedure is suggested to predict fatigue lives of mechanical actuators with Teflon impregnated hard coatings. A virtual fatigue analysis allows for optimizing a mechanical structure, reducing design verification costs, and shortening the development time of actuators.

THE RATIO OF THE WARRANTY PERIOD TO THE PERIOD FOR SUBMITTING A QUALITY CLAIM

The article presents the study of certain issues that arise in the process of establishing and implementing conditions for warranty service of goods

EFFICIENCY OF SERVICE ACTIVITIES FOR SERVICING PRODUCTS OF MACHINE-BUILDING ENTERPRISES

The importance of improving the efficiency of the system of service activities for the maintenance of machine-building products has been outlined. Individual types of service and their features have been analysed. The indicators that determine the effectiveness of service activities by type, the criteria for their evaluation and the most favorable trends in the process of working out the production of certain types of goods have been considered. It has been noted that the service of machine-building products is quite an expensive item of the production activities of enterprises. To justify the costs of warranty service, it is necessary to have certain statistics of product failures and its individual elements for their additional production in order to ensure timely provision to the consumer. The analysis showed that the costs of all types of goods servicing are an important indicator of its organization by enterprises. Statistics for keeping records of all types of product maintenance allows you to improve its production, plan the production of spare parts and reduce the cost, which is an important element of competitiveness.

ANALYSIS OF THE MANAGEMENT OF THE TECHNICAL CONDITION OF AGRICULTURAL MACHINERY PRODUCTS BY THE EXAMPLE OF PRODUCTS OF A PUBLIC JOINT-STOCK COMPANY “PROMTRACTOR”

The article analyzes the data on the management of the technical condition of agricultural machinery objects, presents basic information on warranty service of products of public joint stock company “Promtractor”, provides diagrams showing the procedure for work from the date of delivery of products to the buyer until the end of the warranty period for products.