scholarly journals THE IMPROVEMENT MECHANICAL BRAKE SYSTEM OF THE PASSENGER СAR

2021 ◽  
Vol 1 (38) ◽  
pp. 115-124
Author(s):  
V. Ravlyuk ◽  
Y. Derevianchuk ◽  
S. Pohorielov
Keyword(s):  
Traffic Safety ◽  
Topological Optimization ◽  
Brake System ◽  
The Finite Element Method ◽  
Passenger Cars ◽  
Passenger Car ◽  
Maintenance And Repair ◽  
Brake Pads ◽  
Different Types ◽  
Typical Design

A set of theoretical scientific researches is carried out in the work, which proves that with the use of different types of brake pads in passenger cars some elements of the typical design of the mechanical brake system need to be modernized. Analytical calculations of the brake lever transmission of passenger cars are performed on the basis of the 2D scheme-model. Due to this, ways to improve the most important elements of lever transmission in passenger cars under the conditions of composite pads are proposed. The analysis of the forces acting in the typical design of the lever transmission of a passenger car for different types of pads is performed. The strength of important elements of the mechanical brake system is calculated by applying the finite element method. It is proposed to use the capabilities of the software package Femap Siemens PLM Software, which allows you to optimize the elements of the mechanical system of passenger cars. An example of topological optimization of some elements of brake lever transmission of a passenger car is given. By improving the elements of the mechanical brake system for the use of composite pads in passenger cars, greatly simplifies their design, facilitates maintenance and repair, also reduces the weight of the system as a whole and cost and significantly increases the level of traffic safety.

Construction of Battery Swap Station for Electric Passenger Car

2012 ◽  
Vol 253-255 ◽  
pp. 2231-2236
Author(s):  
Rong Yi Niu ◽  
Xiao Yan Yin ◽  
Ming Yu Zhao
Keyword(s):  
Electric Vehicle ◽  
Status Quo ◽  
The Body ◽  
Battery Pack ◽  
Body Structure ◽  
Passenger Cars ◽  
Passenger Car ◽  
Different Types ◽  
The Status

Basing on the status quo of the development of electric vehicle and electric vehicle’s Charging/battery swap infrastructure, Discussion and analysis is made with focus on the battery swap mode and it’s practising method of electric passenger car. According to the body structure of different types of electric passenger car and the Situation that the battery pack is equipped with, Electric passenger car are divided into two types: chassis battery type and battery rear-equipped type. Respectively, analyzed the battery swap mode for the two types of electric passenger cars; And two feasible battery swap projects are advanced , analysed and compared.Then pointed out the difficulties and problems with the construction of the battery swap station for electric passenger car; Finally, suggestions and methods to solve the problems were offered.

scholarly journals The Needed Features of Connected and Automated Vehicles to Prevent Passenger Car Crashes Caused by Driving Errors

2021 ◽  
Vol 1 (2) ◽  
pp. 370-386
Author(s):  
Roni Utriainen ◽  
Markus Pöllänen
Keyword(s):  
Traffic Safety ◽  
Sudden Change ◽  
Weather Conditions ◽  
Loss Of Control ◽  
Automated Vehicles ◽  
Passenger Cars ◽  
Passenger Car ◽  
Road Users ◽  
Adverse Weather ◽  
Car Crashes

Connected and automated vehicles (CAVs) can enhance traffic safety considerably. However, as CAVs are currently under development, the safety impact cannot be assessed directly. In this study, driver-managed passenger car crashes with fatalities in Finland were investigated qualitatively to evaluate the needed features of the CAVs to avoid these crashes. The focus was on single-car crashes and collisions between passenger cars, in which the immediate risk factor was a driving error (n = 48). Most of the analysed crashes (33 of 48) were due to loss of control with typically adverse weather or road conditions. To avoid these crashes, a CAV should be able to adjust its speed according to the conditions. In 13 of 48 crashes, the car was under control prior to the crash. A reliable capability to recognize other road users is an important CAV feature, because observational errors were common in these cases. In addition, communication between the vehicles could assist in avoiding intersection crashes and crashes caused by a sudden change in weather conditions. This study increases knowledge on crashes related to driving errors and the needed features of CAVs to avoid these crashes. In particular, CAVs’ feature to adjust the speed is important, because cases of loss of control in adverse weather or road conditions were typical events.

Research on the Bogie Maintenance for the Safely Running of Passenger Car

2013 ◽  
Vol 655-657 ◽  
pp. 2313-2318
Author(s):  
Yuan Kui Gao ◽  
Zhong Ji Li
Keyword(s):  
Simulation Analysis ◽  
Suspension System ◽  
Brake System ◽  
Passenger Cars ◽  
Passenger Car ◽  
The Common ◽  
Maintenance Requirements ◽  
Maintenance Process

The passenger cars bogie maintenance overview is described of domestic and international; the maintenance process of the bogie is analyzed mainly. The characteristics and maintenance requirements are summarized. The influence of the fault of the wheels, the foundational brake system and the suspension system on the running security is calculated based on the simulation analysis. According to the simulation result, the recommendations for developing the maintenance process of the key components are proposed considering the engineering experience in the use of the common passenger cars.

scholarly journals Impact of Operating Time on Selected Tribological Properties of the Friction Material in the Brake Pads of Passenger Cars

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 884
Author(s):  
Andrzej Borawski
Keyword(s):  
Tribological Properties ◽  
Operating Time ◽  
Friction Material ◽  
Operating Conditions ◽  
Direct Impact ◽  
Passenger Cars ◽  
Wear Factor ◽  
Brake Pads ◽  
Road Users ◽  
The Coefficient Of Friction

Braking systems have a direct impact on the safety of road users. That is why it is crucial that the performance of brakes be dependable and faultless. Unfortunately, the operating conditions of brakes during their operating time are affected by many variables, which results in changes in their tribological properties. This article presents an attempt to develop a methodology for studying how the operating time affects the value of the coefficient of friction and the abrasive wear factor. The Taguchi method of process optimization was used to plan the experiment, which was based on tests using the ball-cratering method. The results clearly show that the degree of wear affects the properties of the friction material used in the production process of brakes.

Modeling inventory and environmental impacts of car maintenance and repair: A case study of Ford Focus passenger car

2021 ◽  
pp. 128085
Author(s):  
Krzysztof Danilecki ◽  
Jacek Eliasz ◽  
Piotr Smurawski ◽  
Wojciech Stanek ◽  
Andrzej Szlęk
Keyword(s):  
Environmental Impacts ◽  
Passenger Car ◽  
Maintenance And Repair

Measurement of reverberation time of a passenger car utilizing the wavelet filter bank

2005 ◽  
Vol 219 (3) ◽  
pp. 329-336 ◽  
Author(s):  
Sang-Kwon Lee ◽  
Dong-June Yu
Keyword(s):  
Filter Bank ◽  
Bandpass Filter ◽  
Wavelet Filter ◽  
Reverberation Time ◽  
Passenger Cars ◽  
Passenger Car ◽  
Concert Hall ◽  
Low Level ◽  
Wavelet Filter Bank

A few researchers have tried to find the measurement of the reverberation time of a passenger car. However, this has proved to be extremely difficult because the reverberation time of a passenger car is too short to measure using the traditional bandpass filter. If the reverberation time is very short, the product of the reverberation time ( T) and the bandwidth ( B) of the traditional bandpass filter is very small. The low level of the product BT required for the measurement of the reverberation time using the traditional bandpass filter is 16. In order to overcome this problem, the wavelet filter bank has been developed. In the paper, this new wavelet filter is employed to measure the reverberation times of five different classes of passenger car. The low level of the product BT required for the measurement of reverberation time using the wavelet filter is 4. Therefore, it was possible to measure the reverberation times of five passenger cars successfully using the new wavelet filter bank. It is found that the reverberation times measured in most passenger cars are around 0.04. It is a very short reverberation time compared with those of general acoustic rooms like a concert hall.

Cab Conceptual Design for the Equipment System Used for Passenger Car Ergonomic Design and Evaluation

2012 ◽  
Vol 215-216 ◽  
pp. 399-406
Author(s):  
Xiao Ming Du ◽  
Jin Dong Ren ◽  
Yong Qing Liu ◽  
Zhong Xian Chen ◽  
Shi Hai Li ◽  
...  
Keyword(s):  
Product Development ◽  
Cycle Time ◽  
Evaluation Method ◽  
Target Population ◽  
Steering Wheel ◽  
Passenger Cars ◽  
Passenger Car ◽  
Packaging Design ◽  
Development Cycle ◽  
Equipment System

Ergonomics is an important validation content in vehicle product development. The traditional evaluation method of ergonomics adopts physical mockups or prototypes, which is very costly, and is inconvenient to modify, and usually cause prolonged development cycle-time. In this paper, in conjunction with enterprise’s requirements, an ergonomic validation equipment system, which has adjustable main parts, was developed. Firstly, requirements were analyzed, and target model cars ranges were determined, and ergonomic contents which can be validated using this equipment were clarified. The packaging characteristic of the passenger car was analyzed, and the reference fiducial marks system used for packaging design were determined. Based on the requirement of occupant accommodation, anthropometries of target population were statistically analyzed. By using revised SAE J1517 H-Point curves models, the drivers’ seating space was designed, as well as the requirement of the driver seat track travel. Based on the analysis of packaging data of passenger cars, and considering the possible changes, controls such as steering wheel, pedals, sticks, etc., were packaged.

Investigation of the interaction of car wheels with the stand rollers during braking

2021 ◽  
Vol 13 (1) ◽  
pp. 68-77
Author(s):  
Igor Мarmut ◽  
◽  
Andriy Kashkanov ◽  
Vitaliy Kashkanov ◽  
◽  
...  
Keyword(s):  
Traffic Safety ◽  
Technical Condition ◽  
The Body ◽  
Power Model ◽  
Equilibrium Equations ◽  
Design Features ◽  
Complex Objects ◽  
Passenger Cars ◽  
Wheel Drive ◽  
Four Wheel Drive

The article discusses the issues of modeling conditions for obtaining diagnostic information about complex objects. As an example, the study of the braking qualities of four-wheel drive cars on an inertial roller stand is considered. Diagnosing the technical condition of cars from the point of view of traffic safety is one of the most important problems. This is especially important for systems whose technical condition affects traffic safety: especially braking systems. Foreign and domestic experience testifies to the effectiveness of instrumental control. The diagnostic equipment includes roller stands, on which you can check the braking properties of cars. As shown by many studies, in particular, carried out at the Department of Technical Operation and Service of Automobiles, KhNADU (HADI), inertial stands provide more reliable information about the technical condition of the car. Such stands allow you to reproduce the real speed and thermal modes of the brakes (especially those equipped with ABS). To improve the accuracy of diagnosing a car on a roller stand, it is necessary to have an idea of the nature of the interaction of the car wheels with the rollers. The studies of wheel rolling on the stand rollers have been carried out by many authors since the 80s of the last century. However, all these studies were carried out on uniaxial stands and for mono-drive vehicles. Nowadays, a large number of passenger cars have four-wheel drive. Rolling of the wheels of such cars on rollers and their interaction has practically not been studied. Therefore, a return to the study of this issue is relevant. A power model of the system of interaction between the car and the stand has been developed, taking into account the design features of the stand and the design features of the car's suspension. The power model of the system under consideration contains the equilibrium equations of the body and two bridges and the equations of motion of the rollers and wheels of the car. Based on the results of the analysis of the acting forces in the "car-stand" system, the braking moments on the wheels M and the coefficients of the use of the load q during the braking tests of a 4x4 vehicle were determined. The obtained research results allowed to improve the theory of interaction of a car wheel with the rollers of an inertial diagnostic stand.

scholarly journals Hydrogen Mobility Europe (H2ME): Vehicle and Hydrogen Refuelling Station Deployment Results

2018 ◽  
Vol 9 (1) ◽  
pp. 2 ◽  
Author(s):  
Peter Speers
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Electric Vehicles ◽  
First Year ◽  
Passenger Cars ◽  
Passenger Car ◽  
Cell Range ◽  
Fuel Cell Electric Vehicles ◽  
Light Vehicle

Hydrogen Mobility Europe (H2ME, 2015–2022) is the largest European Fuel Cells and Hydrogen Joint Undertaking (EU FCH JU)-funded hydrogen light vehicle and infrastructure demonstration. Up until April 2017, the 40 Daimler passenger car fuel cell electric vehicles (FCEVs) and 62 Symbio Fuel Cell-Range Extended Electric Vans (FC-REEV)-vans deployed by the project drove 625,300 km and consumed a total of 7900 kg of hydrogen with no safety incidents. During its first year of operation (to April 2017), the NEL Hydrogen Fueling HRS (hydrogen refuelling station) in Kolding, Denmark dispensed 900 kg of hydrogen, and demonstrated excellent reliability (98.2% availability) with no safety incidents. The average hydrogen refuelling time for passenger cars is comparable to that for conventional vehicles (2–3 min).

Sign in / Sign up

Export Citation Format

Share Document