Application of Active Subspace Method in Gas Exchange Strategy Calibration on a Variable Valve Timing Gasoline Engine

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Cheng Guan ◽  
Qingjun Ma ◽  
Zhen Huang ◽  
Dong Han
Keyword(s):  
Gas Exchange ◽  
Group Size ◽  
Gasoline Engine ◽  
Training Group ◽  
Subspace Method ◽  
Engine Torque ◽  
Ic Engines ◽  
Variable Valve ◽  
Active Subspace ◽  
Engine Power

Abstract Modern internal combustion (IC) engines have complex configurations with many parameters to be tuned, and this system complication usually leads to a large amount of engine calibration experiments. In this study, the active subspace method was used to build predictive models for the gas exchange-related parameters, including volumetric efficiency, intake mass flow and pumping loss, and the power-related parameters, including engine torque and engine power. The results show that the predicted outputs fit well with the experimental data, with satisfactory coefficients of determination and average absolute errors (AAE). Further, the contributions and influence directions of the input parameters to the outputs were provided based on a sensitivity analysis, which is consistent with the existing knowledge, and therefore, verifies the reliability of the predictive model built based on the active subspace method. Finally, the relation between the training group size and the prediction performance was explored. It is shown that a reduction, up to 66%, in the training group size is still able to maintain good predictive performances of the models, indicating the substantial capability of the active subspace method to reduce the experimental efforts.

Performance Investigation of an Eight Cylinder Gasoline Engine

2014 ◽  
Author(s):  
Ali Kilicarslan ◽  
Mohamad S. Qatu
Keyword(s):  
Experimental Work ◽  
Engine Speed ◽  
Gasoline Engine ◽  
Mechanical Efficiency ◽  
Effective Pressure ◽  
Air Mass ◽  
Engine Torque ◽  
Gasoline Engines ◽  
Temperature And Pressure ◽  
Engine Power

Performance investigation of a Chevrolet 5.7, eight cylinder gasoline engine is experimentally carried out at laboratuary conditions by means of the special softwares called “NetDyn” and “WinDyn”. This experimental work is intended to make contribution to the researchers that experimentally analyze the parameters of gasoline engines with the engine speed in detail. During the experiments, the engine speed is changed from 2500 rpm to 5250 rpm with 250 rpm intervals and steptime for succesive speeds is kept constant as 10 s. Engine power, engine torque, fuel and air flowrates per kW, mechanical efficiency, oil temperature and pressure, break mean effective pressure and exhaust temperatures are measured as a function of engine speed. As the engine speed was increased, it was observed that the air mass flow rate, exhaust and oil temperatures increased while the break mean effective pressure, mechanical volumetric efficiency, and engine torque decreased. Engine power increased between the engine speeds of 2500 rpm and 3750, but it decreased between the speeds of 3750 rpm 5246 rpm.

Intake and Exhaust Systems Equipped with a Variable Valve Control Device for Enhancing of Engine Power

2001 ◽  
Author(s):  
Tetsuya Nakayasu ◽  
Hajime Yamada ◽  
Toshikazu Suda ◽  
Noritoshi Iwase ◽  
Kyo Takahashi
Keyword(s):  
Control Device ◽  
Variable Valve ◽  
Valve Control ◽  
Engine Power ◽  
Exhaust Systems

Development Concept for Non Conventional Hybrid Engine

2010 ◽  
Author(s):  
Harsh Purohit ◽  
Ankit Shah ◽  
Nishant Parekh ◽  
Akash Pandey
Keyword(s):  
Fuel Economy ◽  
Internal Combustion Engines ◽  
Gasoline Engine ◽  
Direct Injection ◽  
Combustion Engines ◽  
Common People ◽  
Advantages And Disadvantages ◽  
Compact Size ◽  
Hybrid Engines ◽  
Variable Valve

Environmental issues and the need for environment-friendly transport have always been a priority for the world due to ever increasing demand of modes of transport. So developing quick and eco friendly vehicle is the trend as of now with most manufacturers globally. There are numerous ways in which manufacturers have tackled these issues. Some of the common approaches undertaken are refinements of existing internal combustion engines. Like developing technologies such as direct injection, VVT (variable valve time), VTEC (variable valve time electronic lift), VGT (variable geometry turbines), reducing engine friction and weight, cam less engines, micro hybrids, etc But the best/optimum compromise between eco friendliness and urge to develop more power with good fuel economy and reduced emission is best met by the development of hybrid engines. Thermal and electric engines both have advantages and disadvantages that are often complementary. Combustion engines offer better range, power and ‘lunge’, but give out exhaust gas, although the current Euro IV norm place strict limits on these. Electric engines are zero-emission and offer very quick pick-up from a stopped position, but the batteries have low range and limited speed. So this complementation of both power trains is exploited in hybrid engines. Now conventional hybrids have many disadvantages such as being bulky with additional weight of battery packs and motors and other auxiliary transmission components, complex and dangerous electric systems, etc. So it is proposed to develop a non conventional hybrid engine which produces power at par with the conventional one and releases emission which is compatible with the stringent emission norms set for the conventional hybrids with considerably lucrative fuel economy comparable with the currently available hybrids in market and yet overcome the drawbacks of the conventional hybrid engines. Also the compact size of the hybrid engine that we propose makes it quite viable to fitted in small vehicles (like bikes, compact cars, etc) which further makes it a more promising technology that can be made available to common people across the globe and there by lead to a better transportation system for people of all class and need. The conceptualization basically includes modification of an inline twin cylinder or a v-twin 4-stroke gasoline engine as a preliminary step towards achieving the above proposed objectives.

Performance and Emissions Characteristics of the Butanol-Gasoline Blends in an EFI Gasoline Engine

2013 ◽  
Vol 788 ◽  
pp. 709-715
Author(s):  
Yu Jie Chen ◽  
Di Ming Lou ◽  
Liang Cheng ◽  
Zhi Yuan Hu ◽  
Pi Qiang Tan
Keyword(s):  
Gasoline Engine ◽  
Emission Characteristics ◽  
Power Performance ◽  
Performance And Emissions ◽  
Test Engine ◽  
Engine Power

An EFI gasoline engine without any modification was used as test engine. the power performance, fuel economical and regulated emission characteristics of the gasoline engine fueled with conventional gasoline, pure butanol, 10%, 15%, 20%, 50%, and 85% butanol-gasoline blends in volume were carried out respectively. The tested results shows that engine power, CO and NOx emissions are lower with the ratio of butanol increasing, while the fuel consumptions and THC emissions are higher as the ratio of butanol increases.

A Study of Engine Torque Control by Variable Valve Actuation

2005 ◽  
Author(s):  
Yutaro Minami ◽  
Hiroshi Iwamo ◽  
Hiraku Ooba ◽  
Naonori Onoda
Keyword(s):  
Torque Control ◽  
Engine Torque ◽  
Variable Valve Actuation ◽  
Variable Valve ◽  
Valve Actuation
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