Computer Simulation as a Tool for Managing the Technical Development of Methods for Diagnosing the Technical Condition of a Vehicle (original) (raw)

Simulation of road traffic conditions on a chassis dynamometer

2019

The article presents and compares the results of exhaust emission tests in conditions of real vehicle traffic with the results obtained during bench tests on a chassis dynamometer in conditions of road traffic simulation. Laboratory tests were designed according to an algorithm approximating the actual driving sections, and when choosing their order during the test construction, a random factor was introduced. The presented approach reflects the random nature of road traffic while ensuring the representativeness of toxic emissions from the vehicle's exhaust system. The results of measurements of carbon dioxide emission, carbon monoxide, nitrogen oxides and hydrocarbons registered in road and stationary tests were compared. Substantial agreement was found between the tests.

Selected research issues of car diagnostics

2017

The aim of the exercise is to introduce the operation principle of chassis dynamometers and measurements that can be performed on them. During classes with the use of a selected research object, four types of measurements will be conducted.

Light Vehicles Test Procedures on an Automated Engine Test Bed

The vehicle test procedure provides a strict guidance regarding the conditions of dynamometer tests and road load, gear shifting, total car weight, fuel quality, ambient temperature, and tire selection and pressure. Designed as a tool for testing vehicles fuel consumption and emission these tests are usually conducted on expensive and infrastructuraly demanding road dynamometers. This paper presents a method for conducting tests like NEDC or WLTC on an automated engine test bed equipped with high dynamic dynamometer in a manner which provides very similar testing environment. Particularly from the educational point of view, this approach, combining simple mathematical modelling, automated engine test bed and software testing and measurement environment like AVL Cameo, provides numerous possibilities in demonstrating engine operation in a virtual but, by performance, fully realized vehicle.

Comparative tests of a passenger car with compression ignition engine on chassis dynamometer during NEDC and WLTC tests and during RDE road test

Combustion Engines, 2019

Air pollution is a challenge for municipal authorities. Increased emission of PM10 and PM 2.5 particles is particularly noticeable in Poland primarily the autumn and winter period. That is due to the start of the heating season. According to the above data, road transport accounted for approximately 5% of the creation of PM10 particles, ca. 7% of PM2.5 and approximately 32% for NOx. In Poland, suspended particles (PM10 and PM2.5) cause deaths of as many as 45,000 people a year. The issue of smog also affects other European cities. Therefore, it is necessary to undertake concrete efforts in order to reduce vehicle exhaust emissions as much as possible. It is therefore justifiable to reduce the emission of exhaust pollution, particularly NOx, PM, PN by conventional passenger cars powered by compression ignition engines. Emissions by these passenger cars have been reduced systematically. Comparative tests of the above emission of exhaust pollution were conducted on chassis dynamometer ...