Study on the Exhaust System Parameters of a Small Gasoline Engine

2008 ◽  
Author(s):  
Peng He ◽  
Yunqing Li ◽  
Jincheng Wang
Keyword(s):  
Gasoline Engine ◽  
Exhaust System ◽  
System Parameters

scholarly journals Vehicle speed influence on exhaust system surface temperature

2021 ◽  
Vol 18 (2) ◽  
pp. 192-202
Author(s):  
M. G. Boiarshinov ◽  
N. I. Kuznetsov
Keyword(s):  
Experimental Study ◽  
Surface Temperature ◽  
Ambient Temperature ◽  
Gasoline Engine ◽  
Experimental Studies ◽  
Exhaust System ◽  
Climatic Conditions ◽  
Constant Speed ◽  
Vehicle Speed ◽  
Low Ambient Temperature

Introduction. The reasons for the formation of an increased amount of condensate in the exhaust system of a car at a low ambient temperature are considered. Since the speed of the vehicle is one of the factors that determine the heating of the exhaust system and the formation of condensation, an experimental study was carried out to determine the temperature of the elements of the exhaust system at various vehicle speeds.The purpose of this study: to establish the features of the temperature change of individual elements of the exhaust system, depending on time at different vehicle speedsMaterials and methods. The sequence of the experimental study consisted of starting the “cold” engine, accelerating the car and then moving the car at a constant speed for 20 minutes. Simultaneously with the start of the engine, the temperature of the elements of the exhaust system was recorded. In this study, thermocouples were used to measure the surface temperature of the exhaust system. Experimental studies were carried out on a Toyota Camry with a gasoline engine in the climatic conditions of the Perm Territory.Results. The dependences of the temperature of the exhaust system elements on time were obtained at different speeds. In an experimental study, it was found that the temperature of the elements of the exhaust system is established within 8-12 minutes from the start of the vehicle at a constant speed; the rear muffler has the least surface heating, and therefore the greatest probability of the formation and accumulation of condensate.Discussion and conclusion. The analysis of the peculiarities of the change in the temperature of the exhaust system during the movement of the vehicle in conditions of low ambient temperature is carried out. The established patterns can be used to obtain information on the processes of condensate accumulation in the exhaust system and are aimed at predicting the amount of condensate accumulation in the exhaust system; to develop new solutions to ensure reliable operation of the exhaust system.

Electromagnetic valve train for gasoline engine exhaust system

2016 ◽  
Vol 17 (3) ◽  
pp. 361-367 ◽  
Author(s):  
X. Y. Fan ◽  
L. Liu ◽  
S. Q. Chang ◽  
J. T. Xu ◽  
J. G. Dai
Keyword(s):  
Gasoline Engine ◽  
Exhaust System ◽  
Valve Train ◽  
Engine Exhaust ◽  
Electromagnetic Valve

scholarly journals Research for intake and exhaust system parameterization of 2-cylinder gasoline engine for RE-EV

2018 ◽  
Vol 42 (13) ◽  
pp. 4256-4256 ◽  
Author(s):  
Jinyoung Jang ◽  
Youngmin Woo ◽  
Yongjin Jung ◽  
Chongpyo Cho ◽  
Gangchul Kim ◽  
...  
Keyword(s):  
Gasoline Engine ◽  
Exhaust System

Experimental investigation of the effects of various factors on the emission characteristics of low-emission natural gas vehicles

2005 ◽  
Vol 219 (6) ◽  
pp. 825-831 ◽  
Author(s):  
C Jang ◽  
J Lee
Keyword(s):  
Natural Gas ◽  
Oxygen Sensor ◽  
Gasoline Engine ◽  
Catalytic Converter ◽  
Electronic Control Unit ◽  
Exhaust System ◽  
Injection System ◽  
Emission Characteristics ◽  
Low Emission ◽  
Natural Gas Vehicles

The aim of this study was to investigate the effects of various factors on the emission characteristics of dedicated natural gas vehicles (NGVs). A conventional light-duty gasoline engine was modified to run on natural gas (NG) by a gas injection system. Experiments were mainly conducted on the optimization of an oxygen sensor, a catalytic converter, and an electronic control unit (ECU) control strategy affecting the emission characteristics of NGVs. Also presented are the emission results of the NGV as a low-emission vehicle by evaluating non-methane organic gases (NMOG). The experimental results present the optimization of the fuel control and exhaust system in NGV that is needed to meet the more stringent emission regulations. It is also suggested that non-methane hydrocarbons (NMHC) constitute about 95 per cent of NMOG, and light-end HCs (C2-C5) account for 91 per cent of total NMOG emissions.

Research for intake and exhaust system parameterization of 2-cylinder gasoline engine for RE-EV

2018 ◽  
Vol 42 (9) ◽  
pp. 3007-3016 ◽  
Author(s):  
Jinyoung Jang ◽  
Youngmin Woo ◽  
Yongjin Jung ◽  
Chongpyo Cho ◽  
Gangchul Kim ◽  
...  
Keyword(s):  
Gasoline Engine ◽  
Exhaust System

The Reliability Improvement of a Conventional Cast Iron Exhaust Manifold for a Small Size Gasoline Engine

2004 ◽  
Author(s):  
Giuseppe De Angelis ◽  
Fernando Palomba
Keyword(s):  
Cast Iron ◽  
Temperature Distribution ◽  
Thermal Fatigue ◽  
Gasoline Engine ◽  
Exhaust System ◽  
High Temperature Phase ◽  
Exhaust Emission ◽  
Temperature Phase ◽  
Exhaust Manifold ◽  
Test Cycle

This paper describes a challenging phase of the development of a cast iron exhaust manifold for a FIAT FIRE 16v engine. On these engine family, a close-coupled catalyst directly connected to the manifold is used. Conventional cast iron could be considered an obsolete material to realize modern car engine exhaust manifolds, but it’s still considerable as a profitable technology due to relatively low processing and part costs. Moreover, due to actual exhaust emission regulation, the engine calibration determinates higher temperature values and gradients on the exhaust system than in the past. Consequently thermal fatique life, weight and manifold wall thickness limits become some of the main concerns for the engine designer when conventional cast iron is considered. To improve the actual cast iron manifold, according to the engine program timeline, a simplified, fast approach to thermal fatigue life improvement has been used, involving only in-house resources to achieve a further cost-time reduction in the definition and implementation of the necessary design changes. By means of Infrared Thermography, the distribution of the external surface of the exhaust manifold was acquired, on the engine bench, in-firing conditions, during specific accelerated thermal fatigue test cycle. The 2D surface temperature distribution was properly elaborated to obtain a 3D temperature distribution and a thermostructural FE Analysis has been developed to predict the critical areas of the component, considering the variation of the relevant material properties with temperature. The evaluation of the regions where thermal crack initiation and propagation were expected has been done considering the stress distributions in the high-temperature phase and during the cool-down phase of the test cycle. The comparison with the cracked manifold returned from the road test has shown a good agreement with the first results obtained from the analysis. For the optimisation, the same temperature acquisition and analysis were performed considering the manifold, made of the same material, used for a similar application for which no failures occurred during tests, obtaining information about the safe combination of stress and temperature level for the specific spheroid cast iron used. Those data were applied to validate the improved design that passed the following endurance tests, with only a minor acceptable impact in terms of weight, costs and development time.

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