Lucian CRIȘAN-LUPA

31-76 CONTRIBUȚII LA CERCETAREA EXPERIMENTALĂ A INFLUENȚEI SISTEMULUI DE EVACUARE ASUPRA PERFORMANȚELOR ÎN CAZUL AUTOTURISMULUI DAEWOO MATIZ

Această intrare a fost publicată în 2017 Volumul 31 și etichetată Dan MOLDOVANU Doru Laurean BĂLDEAN Ioan Aurel CHERECHEŞ Lucian CRIȘAN-LUPA la de

Contributions to the experimental research of exhaust system influence upon performances in the case of Daewoo Matiz vehicle

 

The present experimental research points out a complete work of testing the exhaust pipe and after-treatment systems for a modern spark engines with different components, by evaluating the phenomenology and few parameters. There is a fact that the gas exhaust system construction and operation has an influence upon the gas flow and also on the engine behaviour. Testing the exhaust after-treatment systems may generate engineering improvement solutions in order to optimize the engine performance and hydrocarbon economy.

Nowadays in Europe the environmental issues and energy independence are very often priorities on the public and private agenda. The present paper research the issue of practical testing exhaust gas pipe-line and advances the solution of repair and evaluate existing components, with significant changes in dynamic performance and engine environmental impact. By restoring the after-treatment components in their original state the emissions are lowered.

 

Keywords: After-treatment, Daewoo, Exhaust, Pollutant, Matiz

Cuvinte cheie: Depoluare, Daewoo, Evacuare, Poluant, Matiz

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31-72 STUDIUL INFLUENȚEI UNOR FACTORI CONSTRUCTIV-FUNCȚIONALI ASUPRA CALITĂȚII PORNIRII, ARDERII ȘI GENEZEI EMISIILOR MOTORULUI 1.7 CDI DE LA MERCEDES VANEO

Această intrare a fost publicată în 2017 Volumul 31 și etichetată Doru Laurean BĂLDEAN Ioan Aurel CHERECHEŞ Lucian CRIȘAN-LUPA la de

Study of the influence of manufature and operational factors upon the quality of engine start, combustion and emissions generation of 1.7 CDI engine from MERCEDES VANEO

 

The present paper makes a theoretical and applied study of the components and entire engine starting and preheating system from diesel 1.7 CDI Mercedes Vaneo engine in relation with glow plugs, air filter, engine behaviour and smoke particles generation, in various cold-starting conditions and procedures, with diagnosis equipment connected to the electric and electronic management system. There is pointed out the preheating system for diesel engine with special glow plugs for air temperature increase before the fuel injection supply in the combustion chamber. These aspects have a significant influence upon the pollutant emissions production and development. Lowering the pre-combustion temperatures in the cylinder negatively influences the compression ignition process by dissipating the heat level. The opportunity for studying the pre-heating system of the Vaneo engine comes from the frequency of such a malfunction in compression ignited engines during winter cold-start.

 

Keywords: combustion, diesel, hydrocabrons, Mercedes, Vaneo

Cuvinte cheie: aprindere, diesel,  hidrocarburi, Mercedes, Vaneo

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31-69 ANALIZA FENOMENELOR SEMIOZICE ÎN CAZUL SISTEMULUI ELECTRONIC DE CONTROL A MOTORULUI CU APRINDERE PRIN SCÂNTEIE DE LA OPEL ASTRA F

Această intrare a fost publicată în 2017 Volumul 31 și etichetată Dan MOLDOVANU Doru Laurean BĂLDEAN Lucian CRIȘAN-LUPA la de

The analyze of semiosis phenomena in the case of electronic control system of the spark ignited engine from opel astra f

 

The present paper shows a detailed analysis of semioses phenomena for modern spark engines with electronic processing components installed in order to improve engine control, by generating a diagnosing protocol of the power-train in operation. It points out the specific field of electronics measuring methods (with modern micro-processor components) developed for spark ignited engines, specifically the ones with single point injection in the present case. There is known that the sensors and actuators operation besides the electronic control unit have a major influence upon the operational process and also on the engine reliability and economy. Studying and testing the electronic control systems on spark ignited engines may lead to a different engineering measures and improvement strategies in order to optimize the power-train performance and fuel economy, while the vehicle’s dynamic will be accurately controlled. Today in the field of computer-science and technology diagnosing process and procedures are very important in order to gain the most performance and functionality out of a component or a system. The present article presents the issue of experimentally evaluating electronic control system and improving the operation with significant changes and measurements on the parameters which must comply with the manufacturer’s prescription of system performance.

 

Keywords: automotive, electronics, injection, simptoms, spark

Cuvinte cheie: automobilistic, electronică,  injecție, simptome, scânteie

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30-47 STUDIUL PRIN MODELAREA SISTEMULUI DE POSTTRATARE A GAZELOR DE EVACUARE ALE MOTOARELOR CU ARDERE INTERNĂ

Această intrare a fost publicată în 2016 Volumul 30 și etichetată Dan MOLDOVANU Doru BĂLDEAN Lucian CRIȘAN-LUPA la de

THE STUDY TROUGH MODELING OF AFTER-TREATMENT
SYSTEM FOR EXHAUST GASES FROM INTERNAL
COMBUSTION ENGINES
The present work shows a detailed analysis of gases after-treatment
systems for modern spark engines with different components installed, by
generating a simulation research of the working phenomenology and
parameters. It outlines the specific field of gas after-treatment methods (with
modern catalytic components) developed for spark ignited engines, specifically
the energy and economy improving possibilities through simulation of the final
evacuation process of gases. There is considered that the gas evacuation and
exhaust system architecture besides the catalytic converter have a major
influence upon the phenomena of gas flow and also on the engine economy
and pollution. Modeling and simulating the after-treatment systems on spark
ignited engines may lead to a multitude of engineering acts and improvement
strategies in order to optimize the environmental performance and fuel
economy, while the engine dynamic performance will be accurately managed.
Today in European Union the specific regulations in antipollution domain and oil
independence in relation with the Middle East are more often discussed, being
high priorities on the institutional and executional panel. The present article
outlines the issue of modeling/simulating exhaust engine systems and
improving the existing components but with significant changes which must
comply with the law requirements of reduced pollution and low consumption.
Keywords: After-treatment, Combustion, Exhaust, Pollutant, Simulation
Cuvinte cheie: Depoluare, Detentă, Evacuare, Poluant, Simulare

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26-48 STUDIUL INFLUENȚEI BIOCOMBUSTIBILILOR ASUPRA PERFORMANȚELOR CONVERTOARELOR CATALITICE LA MOTOARELE CU APRINDERE PRIN SCÂNTEIE

Această intrare a fost publicată în 2014 Revista Volumul 26 și etichetată Bogdan CRIȘAN-LUPA Lucian CRIȘAN-LUPA la de

STUDIES REGARDING THE INFLUENCE OF BIOFUELS ON THE PERFORMANCE OF CATALYTIC CONVERTERS MOUNTED ON SPARK IGNITED ENGINES In this paper, the problem of study is designed maintenance or performance degradation of catalysts used in catalytic exhaust systems, which equips vehicles powered by an internal combustion engine with spark-ignition, in terms of using a fuel that comprises bioethanol.
Keywords: biofuel, bioethanol, catalytic converter, exhaust system, spark-ignited engines

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26-47 ANALIZA INDICILOR DE PERFORMANȚĂ ȘI DE ECONOMICITATE AI UNUI MOTOR DIESEL CE FUNCȚIONEAZĂ CU BIOCOMBUSTIBILI

Această intrare a fost publicată în 2014 Revista Volumul 26 și etichetată Dan MOLDOVANU Lucian CRIȘAN-LUPA la de

PERFORMANCE AND ECONOMICITY ANALYSIS OF A DIESEL ENGINE THAT RUNS ON BIODIESEL
The paper aims to analyse through simulation of performance indicators (actual Power and Time effective) and economic indices (actual fuel specific consumption) of an engine operating on biofuels. The simulation program is Lotus Engine Simulation, free software for monocilindrice engines. There have been a series of simulations to highlight the differences between a pure Diesel fuel and B100 (100 % Biodiesel).
Keywords: Biodiesel, Diesel, simulation, Lotus Engine Simulation

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