Research on Transmitting Efficiency of Supercharged Device

2011 ◽  
Vol 63-64 ◽  
pp. 237-240
Author(s):  
Qi Xin Sun ◽  
Limin Chen
Keyword(s):  
Diesel Engine ◽  
Environmental Performance ◽  
Combustion Engine ◽  
Exhaust Gas ◽  
Analysis Model ◽  
Turbocharged Diesel Engine ◽  
Technological Advances ◽  
Turbocharging System ◽  
Light Vehicle ◽  
Gas Supply

In recent years, the internal combustion engine has been widely used through technological advances to improve its environmental performance. Mechanical and electrical integration of the engine turbocharging system is based on conventional turbocharging system to increase motor in parallel with the turbocharger and the corresponding reversible energy storage components, so that achieve by adjusting the energy input or output direction and the size of the motor to adjust the exhaust turbocharger operating point and the gas supply function. According to matching requirements of light vehicle diesel engine, the analysis model of exhaust gas energy is obtained through qualitative analysis of exhaust gas energy in turbocharged diesel engine.

Stabilizing Excessive EGR With an Oxidation Catalyst on a Modern Diesel Engine

2002 ◽  
Author(s):  
Ming Zheng ◽  
David K. Irick ◽  
Jeffrey Hodgson
Keyword(s):  
Diesel Engine ◽  
Oxidation Catalyst ◽  
Stable Operation ◽  
Exhaust Gas ◽  
Oxides Of Nitrogen ◽  
Engine Operation ◽  
Turbocharged Diesel Engine ◽  
New Approach ◽  
Cyclic Variations ◽  
Gas Recirculation

For diesel engines (CIDI) the excessive use of exhaust gas recirculation (EGR) can reduce in-cylinder oxides of nitrogen (NOx) generation dramatically, but engine operation can also approach zones with high instabilities, usually accompanied with high cycle-to-cycle variations and deteriorated emissions of total hydrocarbon (THC), carbon monoxide (CO), and soot. A new approach has been proposed and tested to eliminate the influences of recycled combustibles on such instabilities, by applying an oxidation catalyst in the high-pressure EGR loop of a turbocharged diesel engine. The testing was directed to identifying the thresholds of stable operation at high rates of EGR without causing cycle-to-cycle variations associated with untreated recycled combustibles. The elimination of recycled combustibles using the oxidation catalyst showed significant influences on stabilizing the cyclic variations, so that the EGR applicable limits are effectively extended. The attainability of low NOx emissions with the catalytically oxidized EGR is also evaluated.

Maintaining Marine Diesel Emissions Using Performance Monitoring

2010 ◽  
Author(s):  
Herbert Roeser ◽  
Dilip Kalyankar
Keyword(s):  
Diesel Engine ◽  
Performance Monitoring ◽  
Fuel Oil ◽  
Exhaust Gas ◽  
Gas Emission ◽  
Heavy Fuel Oil ◽  
Tier Ii ◽  
Technological Advances ◽  
Exhaust Gas Emission ◽  
Marine Diesel

Ships are an integral part of modern commercial transport, leisure travel, and military system. A diesel engine was used for the first time for the propulsion of a ship sometime in the 1910s and has been the choice for propulsion and power generation, ever since. Since the first model used in ship propulsion, the diesel engine has come a long way with several technological advances. A diesel engine has a particularly high thermal efficiency. Added to it, the higher energy density of the diesel fuel compared to gasoline fuel makes it inherently, the most efficient internal combustion engine. The modern diesel engine also has a very unique ability to work with a variety of fuels like diesel, heavy fuel oil, biodiesel, vegetable oils, and several other crude oil distillates which is very important considering the shortage of petroleum fuels that we face today. In spite of being highly efficient and popular and in spite of all the technological advances, the issue of exhaust gas emissions has plagued a diesel engine. This issue has gained a lot of importance since 1990s when IMO, EU, and the EPA came up with the Tier I exhaust gas emission norms for the existing engine in order to reduce the NOx and SOx. Harsher Tier II and Tier III norms were later announced for newer engines. Diesel fuels commonly used in marine engines are a form of residual fuel, also know as Dregs or Heavy Fuel Oil and are essentially the by products of crude oil distillation process used to produce lighter petroleum fuels like marine distillate fuel and gasoline. They are cheaper than marine distillate fuels but are also high in nitrogen, sulfur and ash content. This greatly increases the NOx and SOx in the exhaust gas emission. Ship owners are trapped between the need to use residual fuels, due to cost of the large volume of fuel consumed, in order to keep the operation of their ships to a competitive level on one hand and on the other hand the need to satisfy the stringent pollution norms as established by the pollution control agencies worldwide. Newer marine diesel engines are being designed to meet the Tier II and Tier III norms wherever applicable but the existing diesel engine owners are still operating their engines with the danger of not meeting the applicable pollution norms worldwide. Here we make an effort to look at some of the measure that the existing marine diesel engine owners can take to reduce emissions and achieve at least levels prescribed in Tier I. Proper maintenance and upkeep of the engine components can be effectively used to reduce the exhaust gas emission. We introduced a pilot program on diesel engine performance monitoring in North America about two years ago and it has yielded quite satisfying results for several shipping companies and more and more ship owners are looking at the option of implementing this program on their ships.

Performance and Exhaust Emissions of a Diesel Engine Running With DME

2001 ◽  
Author(s):  
F. Maroteaux ◽  
G. Descombes ◽  
F. Sauton
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Exhaust Emissions ◽  
Injection Rate ◽  
Combustion Reaction ◽  
Emissions Reduction ◽  
Turbocharged Diesel Engine ◽  
Turbocharging System ◽  
Performance And Emissions ◽  
Thermodynamic Conditions

Abstract This research investigates engine performance and the potential of reducing exhaust emissions by using Dimethyl Ether (DME) which is an alternative fuel for diesel engines. The objective of this study it to evaluate (on the bed test) the performance and emissions reduction potential of an engine running with DME. A 4 cylinder passenger car HSDI Common Rail turbocharged diesel engine without specific modifications was used. The results obtained on this engine running with DME using diesel fuel as reference are encouraging. In the next steps of this study the injection rate will be adapted to DME operation and to the geometric and thermodynamic conditions of the combustion reaction. A study of the combustion reaction is also necessary in order to optimize the turbocharging system to exclusive DME operation.

scholarly journals Experimental analysis of absorption refrigeration system driven by waste heat of diesel engine exhaust

2019 ◽  
Vol 23 (1) ◽  
pp. 149-157
Author(s):  
Mukul Kumar ◽  
Randip Das
Keyword(s):  
Diesel Engine ◽  
Waste Heat ◽  
Combustion Engine ◽  
Engine Performance ◽  
Exhaust System ◽  
Bench Test ◽  
Exhaust Gas ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Absorption Refrigeration System

This work presents an experimental study of an ammonia-water absorption refrigeration system using the exhaust of an internal combustion engine as energy source. The exhaust gas energy availability, the performance of the absorption refrigeration system and the engine performance are evaluated. A commercial turbocharged Diesel engine has been tested in a bench test dynamometer, with the absorption refrigeration system adapted to the exhaust system. The maximum COP obtained from the refrigeration system is 0.136 and it has been shown that heat energy available with exhaust gas is capable of producing sufficient cooling capacity for air conditioning the vehicle without requiring any energy input from the engine.

Application of carbon nanotubes as additives improving the environmental performance of diesel engine

2020 ◽  
Keyword(s):  
Carbon Nanotubes ◽  
Diesel Engine ◽  
Diesel Fuel ◽  
Environmental Performance ◽  
Exhaust Gas ◽  
Exhaust Gases ◽  
Full Load ◽  
Ultrasonic Apparatus ◽  
Load Mode

The actuality of the article is due to the need to improve the toxicity indicators of dieselengines exhaust gases. One of the modern ways to achieve the required indicators of exhaustgas toxicity is to add eco-friendly additives to the fuel. An opportunity of using carbonnanotubes as eco-friendly additives to petroleum diesel fuel is considered. Experimentalstudies of the D-243 diesel engine running on petroleum diesel fuel with the addition of 125,250 and 500 mg/l nanotubes were carried out. Mixing of petroleum diesel fuel with nanotubeswas performed with the usage of an ultrasonic apparatus. A possibility of improving theenvironmental performance of a diesel engine when adding nanotubes to the fuel is shown. Ina full-load mode, the addition of 500 mg/l carbon nanotubes to the fuel reduced the exhaustsmoke from 26.0 % to 11.2 % according to the Hartridge scale. Keywords diesel engine; petroleum diesel fuel; carbon nanotubes; exhaust gas toxicity indicators; exhaust gas smokiness

Tuneable model predictive control of a turbocharged diesel engine with dual loop exhaust gas recirculation

2017 ◽  
Vol 232 (8) ◽  
pp. 1105-1120 ◽  
Author(s):  
Yunfan Zhang ◽  
Guoxiang Lu ◽  
Hongming Xu ◽  
Ziyang Li
Keyword(s):  
Diesel Engine ◽  
Model Predictive Control ◽  
Predictive Control ◽  
Mimo System ◽  
Exhaust Gas Recirculation ◽  
Intake Manifold ◽  
Exhaust Gas ◽  
Strong Nonlinearity ◽  
Turbocharged Diesel Engine ◽  
Gas Recirculation

The air path of a turbocharged diesel engine is a multi-input multi-output (MIMO) system with strong nonlinearity, coupling effect, delay and actuator constraints. This makes the design and tuning of the controller complex. In this paper, a tuneable model predictive control (TMPC) controller for a diesel engine’s air path with dual loop exhaust gas recirculation (DLEGR) is presented. The objective is to regulate the intake manifold pressure and exhaust gas recirculation (EGR) mass flow in each loop to meet the time-varying setpoints through coordinated control of the variable geometry turbocharger (VGT) and EGR valves. The TMPC controller adopts the design framework of an MPC controller. This controller is also able to provide a map-based switching scheme for the local controller and the controller’s weightings. A comparison between the TMPC controller and a conventional PID controller is conducted on a validated real-time engine model. The simulation results show that the TMPC controller achieves lower overshoot, faster response and a shorter settling time on the manipulated objects. These improvements are beneficial for obtaining lower fuel consumption. In order to test the capability of the TMPC controller, it is validated on a hardware in the loop (HIL) platform. The results show that the agreement between the simulation and the actual ECU’s response is good.

Analysis of Engine Performance Parameters of Electrically Assisted Turbocharged Diesel Engine

2015 ◽  
Vol 799-800 ◽  
pp. 861-864
Author(s):  
Tayfun Özgür ◽  
Kadir Aydın
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Fuel Economy ◽  
Engine Performance ◽  
Performance Parameters ◽  
Turbocharged Diesel Engine ◽  
Charging System ◽  
Electrically Assisted ◽  
Turbocharging System ◽  
Exhaust Energy

Charging system is used to increase the charge density. Supercharging system suffers from fuel consumption penalty because of compressor powered by engine output. Turbocharging system uses wasted exhaust energy that means compressor powered by exhaust turbine but has a turbo lag problem. The electrically assisted turbocharger which can eliminate turbo lag problem and fuel consumption penalty is the topic of this paper. The purpose of this paper is to analyze the effect of electrically assisted turbocharger on diesel engine performance parameters. The AVL Boost software program was used to simulate the electrically assisted turbocharged diesel engine. Simulations results showed that electrically assisted turbocharger increases low end torque and improves fuel economy.

Sign in / Sign up

Export Citation Format

Share Document