A Case Study of Compressor Surge Related Noise on Turbocharged 2.0-L Gasoline Engine

2021 ◽  
Author(s):  
Shafeeq Rahman ◽  
Amit Chavan ◽  
Dhara Mallesh Pyla ◽  
Sreekala Deguntla ◽  
Megavannan Jayakumar ◽  
...  
Keyword(s):  
Gasoline Engine ◽  
Compressor Surge

A case study on particulate emissions from a gasoline plug-in hybrid electric vehicle during engine warm-up, taking into account start–stop operation

2020 ◽  
Vol 234 (13) ◽  
pp. 2907-2922
Author(s):  
Martin Lenz ◽  
Moritz Cremer ◽  
Daniel Guse ◽  
Henning Röhrich ◽  
Stefan Pischinger
Keyword(s):  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Gasoline Engine ◽  
Combustion Engine ◽  
Catalytic Converter ◽  
Particulate Filter ◽  
Particulate Emissions ◽  
Warm Up ◽  
Hybrid Electric

Concerning the discussions about emissions caused by individual mobility, it is foreseeable that future vehicle concepts will increasingly be based on hybrid powertrains. These systems lead to more complex operating scenarios, which have a significant influence on the resulting emissions of the engine. This work shows a case study and the results in the operation and emission behavior of a plug-in hybrid electric vehicle with a direct injection gasoline engine when operated in an internationally recognized driving cycle. The vehicle’s exhaust aftertreatment system consists of a three-way catalytic converter; a particulate filter is not installed. The emissions are analyzed with a focus on particulate number emissions (from soot), especially during the warm-up phase and the frequent start–stop events (in total, there are 12 internal combustion engine operating phases), which are typical for hybrid vehicles. The results show that approximately 50% of the emitted particulates have a smaller size, 23 nm (a very high number of particulates with a mean size of 10 to 15 nm are present), which are currently not regulated, but are expected to have a high risk of adverse health effects.

scholarly journals Engine-generated solid particles – a case study

2018 ◽  
Vol 174 (3) ◽  
pp. 33-39
Author(s):  
Katarzyna SZRAMOWIAT ◽  
Joseph WOODBURN ◽  
Wiktor PACURA ◽  
Katarzyna BERENT ◽  
Piotr BIELACZYC ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Gasoline Engine ◽  
Solid Particles ◽  
Road Vehicles ◽  
Passenger Cars ◽  
Sem Images ◽  
Best Available Techniques ◽  
Particulate Filters ◽  
Gasoline Vehicles

Current ecological trends and resulting legislation like European emissions standards Euro 6d or Best Available Techniques are setting new challenges in the field of environmental protection. Since the problem of emissions of particulate matter from diesel engines was solved by the application of diesel particulate filters (DPFs or FAPs) and due to the global dominance of gasoline fuelled passenger cars, particular concern has been focused on improvement of emissions performance of gasoline vehicles, including hybrids, as well as heavy-duty and non-road vehicles. This paper presents the results of preliminary studies on the chemical and physical properties of gasoline engine-generated particles, including nanoparticles. SEM images were presented which allowed identification of the character of particulate matter and estimates of the dimensions of particles. Moreover, the particles were found to be composed of different elements, including Cu, Si, Na, Ca, Zn and P, pointing to the origination of these particles from the pistons and lubricant additives.

A Case Study on Reducing the Fuel Pulse Noise from Gasoline Engine Injectors

2020 ◽  
Author(s):  
Weiguo Zhang ◽  
Toon Tan ◽  
John Malicki ◽  
Glenn Whitehead
Keyword(s):  
Gasoline Engine ◽  
Pulse Noise

Impact of gasoline engine deposits on light duty vehicle emissions: in-use case study in Beijing, China

2012 ◽  
Vol 6 (5) ◽  
pp. 717-724 ◽  
Author(s):  
Xin Yue ◽  
Ye Wu ◽  
Xianjiang Huang ◽  
Yao Ma ◽  
Yuan Pang ◽  
...  
Keyword(s):  
Vehicle Emissions ◽  
Gasoline Engine ◽  
Use Case ◽  
Light Duty ◽  
Light Duty Vehicle ◽  
Beijing China ◽  
Engine Deposits

scholarly journals Computer Engineering and Design of Cast Parts for Internal Combustion Engine Crankcase

2019 ◽  
Vol 6 (2) ◽  
pp. e24-e30
Author(s):  
O. V. Akimov ◽  
A. P. Marchenko ◽  
V. I. Alyokhin ◽  
V. Soloshenko ◽  
O. Y. Shinsky ◽  
...  
Keyword(s):  
Cast Iron ◽  
Metal Content ◽  
Gasoline Engine ◽  
Gray Cast Iron ◽  
Combustion Engine ◽  
Maximum Size ◽  
Cylinder Block ◽  
Computer Engineering ◽  
Cast Parts

This paper discusses the formulation of the problem of designing the cast parts block-crankcases engine in order to ensure its quality for the case study of cast iron parts of the cylinder block inline four-cylinder gasoline engine with the capacity of 1.4 dm3. Material Ch190B is gray cast iron with optional chemical composition, and sulfur – no more than 0.15 %, phosphorus – no more than 0.1 %, structure – perlite plate. The results obtained in this work confirm the conclusions about the possibility of reducing the metal content of the casting and changing the technical conditions of its manufacture. According to the results of the research, the developed recommendations are aimed at stabilizing the characteristics of the metal, reducing metal consumption, and changing the technical conditions for the defectiveness of this type of castings. Recommendations for changing the configuration of the partition in order to reduce the metal content of the casting and recommendations for changing the Technical Conditions for casting defects were stated for the casting block crankcase 4ChN12/14. For defects of discontinuity type, the maximum size was defined, and controlled places of their detecting were defined. Keywords: CAD, CAE, block-crankcase, 3D model, casting defect.

scholarly journals Effect of Splitters in Recirculation Channels on Performance of Turbocharger Compressors Used in Gasoline Engines- A CFD Study

2019 ◽  
Vol 16 (1) ◽  
pp. 6214-6229
Author(s):  
N. Nithesh ◽  
S. Prajwal
Keyword(s):  
Steady State ◽  
Gasoline Engine ◽  
Operating Conditions ◽  
Compressed Air ◽  
Cfd Analysis ◽  
Gasoline Engines ◽  
Excess Air ◽  
Compressor Surge ◽  
Compressor Inlet ◽  
Compressor Efficiency

Turbochargers used in gasoline engines have their compressor outlet directly coupled to the engine inlet via the throttle valve. On sudden closing of the throttle, the compressor outlet is blocked, and the compressed air has no path to exit resulting in a compressor surge. Compressor recirculation valves are used to connect the outlet of the compressor to the inlet to recirculate excess air and thus reduce the compressor surge. Under normal operating conditions, when the valve is closed, the channel connecting the compressor inlet and the valve causes an inlet disturbance resulting in the reduction of compressor efficiency. Hence a steady state CFD analysis of a gasoline engine turbocharger compressor modelled with a recirculation channel at the inlet was conducted. The channel connecting the compressor inlet and the recirculation valve was observed to cause inlet aerodynamic disturbance resulting in a drop in compressor efficiency by 1%. To overcome this problem, splitters were used in recirculation channels and 80% recovery of loss was observed with the use of splitters.

Analysis of Compressor Surge in a Military Turbojet Engine: A Case Study

2017 ◽  
Vol 34 (1) ◽  
Author(s):  
R. K. Mishra ◽  
R. Raghavendra Bhat ◽  
Sunil Chandel
Keyword(s):  
Fatigue Failure ◽  
Rotor Blades ◽  
Foreign Object ◽  
Remedial Measures ◽  
Compressor Rotor ◽  
Turbojet Engine ◽  
Compressor Surge

AbstractA case of compressor surge with bang noise during takeoff roll is investigated and presented in this paper. Fatigue failure of compressor rotor blades during takeoff is found to disturb the aerodynamics of compressor flow causing the surge. Based on evidences, failure of rotor blades and compressor surge due to over-speed and foreign object debris is ruled out. The paper presents the methodology adopted for the investigation and also suggests remedial measures necessary to prevent such incidents.

scholarly journals Automotive compressor: effect of an electric throttle in the upstream circuit on the surge limit

2018 ◽  
Vol 234 ◽  
pp. 03006 ◽  
Author(s):  
Pierre Podevin ◽  
Amélie Danlos ◽  
Michaël Deligant ◽  
Plamen Punov ◽  
Adrian Clenci ◽  
...  
Keyword(s):  
Transient Analysis ◽  
Gasoline Engine ◽  
Transient Operation ◽  
Flow Rates ◽  
Transient Conditions ◽  
Lower Flow ◽  
Throttle Valve ◽  
Compressor Surge ◽  
Surge Line ◽  
Set Up

On vehicles equipped with a turbocharged engine, there is a risk of compressor surge. This surge generates instabilities that lead to driving inconvenience, or even mechanical failure of the supercharging system. In general, the surge appears rather in transient operation: sudden closing of the throttle valve on gasoline engine, regulation of the EGR on diesel engine linked also to turbine regulation (VNT device or Waste Gate). On a turbocharger test stand, we set up the surge line in a “conventional way”: stationary experiments. Then we set up this line in transient conditions for different positions of an electric throttle placed upstream the compressor. It appears that: the surge limit is pushing back to lower flow rates when it is determined in transient; the surge limit is pushing back to lower flow rates when closing the throttle valve. The tests were carried on by the transient analysis of the surge during a quick closing-opening of the electric throttle valve.

scholarly journals Wheeling and Dealing

2005 ◽  
Vol 127 (04) ◽  
pp. 44-46
Author(s):  
John Varrasi
Keyword(s):  
World War I ◽  
20Th Century ◽  
Automobile Industry ◽  
Electric Motor ◽  
Gasoline Engine ◽  
World War ◽  
The Us ◽  
French And English

This article highlights the inventiveness of engineers that made the auto trade big business in the early 20th century. While lacking the fame and name recognition of others in the US automobile business around the time of World War I, Lloyd R. Smith’s contribution to the industry was major. The A.O. Smith frame plant stands as a vivid case study on the role of engineering and technical innovation in the emergence and growth of the automobile industry. At the start of the 20th century, the gasoline engine initially competed for popularity with the electric motor, which was used on French and English roads. The electric motor was cleaner and easier to shift. It was considered more reliable and safer. The story of the automobile is told around images and symbols of speed and power, beauty and elegance, freedom and open roads. For ASME and the mechanical engineering community, the automobile is also about technological progress and engineering achievement beginning with the 20th century and building for a100 years.

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