Modern common rail diesel engines are normally optimized with commercial diesel. As a result, the engine control unit’s calibration is established to achieve best compromise between performances and exhaust pollutants. Biodiesel has faster combustion rate higher chamber temperature than diesel, which necessitates injection of fuel volumes compensate for lower calorific value biodiesel compared ...

In turbocharged engines with wastegate the exhaust pressure can change rapidly. A method to estimate the exhaust manifold pressure is presented for diagnosis of wastegate and turbocharger on spark-ignited engines. It does not require any extra sensors in the exhaust system after the calibration. A non-linear model is developed of the exhaust pressure. Estimates of the exhaust manifold pressure ...

In the practical application of indoor air quality assurance system, it is difficult to detect fault valves, CO2 sensors and other components, resulting in substandard increased energy consumption. this paper, 16 conditions 1 no condition were simulated by Simulink simulation software for primary return conditioning system summer, a typical characteristic table was obtained. It found that PM2.5...

In urban public transportation and highly diversified air environments, pollutant exposure is becoming an increasing concern in terms of health personal safety. Herein, the scientific literature on quality virus transmission densely crowded environments reviewed to determine effective control methods. The research results are classified basis different environments. Much has been conducted poll...

Recent epidemiological evidence connects ambient air pollutants to adverse neurobehavioural effects in adults. In animal models, subchronic controlled exposures to diesel exhaust (DE) have also showed evidence of neuroinflammation. Evidence suggests that DE not only affects outcomes commonly associated with cognitive dysfunction, but also balance impairment. We conducted a controlled human expo...

Several factors, such as age and nutritional status, can affect the susceptibility to influenza infections. Moreover, exposure to air pollutants, such as diesel exhaust (DE), has been shown to affect respiratory virus infections in rodent models. Influenza virus primarily infects and replicates in respiratory epithelial cells, which are also a major targets for inhaled DE. Using in vitro models...

ABSTRACT Stringent NOx and particulate emission constraints require high levels of exhaust gas recirculation. In this paper we model and analyze a Variable Valve Timing methodology that in steady-state achieves large levels of internal Exhaust Gas Recirculation (iEGR) or residual charge in Compression Ignition Direct Injection (CIDI) engines. Current external Exhaust Gas Recirculation (eEGR) te...

In this research work, the effectiveness of stainless steel sheet for the production of motor cycle exhaust muffler burn protector was investigated. Energy Dispersive X-Ray fluorescence method was used to determine the chemical composition of the stainless steel materials and exhaust muffler of the motor cycle. The stainless steel sheet was perforated and folded to frustum shape to achieve aero...

In turbocharged engines with wastegate the exhaust pressure can change rapidly. Two methods to estimate the exhaust manifold pressure are compared for diagnosis of wastegate and turbocharger of a spark-ignited engine. One relies on the first law of thermodynamics and produces changes in exhaust manifold pressure. The second uses a model of the mass of remaining exhaust gases in the cylinder and...