The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform

Zhaolei Zheng - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Spark Ignition Timing and Water Injection Temperature on the Knock Combustion of a GDI Engine
    Energies, 2020
    Co-Authors: Zhaolei Zheng
    Abstract:

    A turbocharged downsizing spark ignition (SI) engine cooperating with an in-cylinder direct injection Technology is one of the most effective ways to improve the power and economy of gasoline engines. However, engine knock has limited the application and development of the downsizing of gasoline engines. Water injection Technology can effectively suppress the knock. In this study, a method of numerical simulation was used to explore the effect of the water injection temperature on the combustion and suppression of the knock. First of all, the knock of the gasoline engine was induced by advancing the spark timing. Then, when the other conditions were the same, different water injection temperatures were set. The results show that lowering the water injection temperature reduced the knock intensity in the cylinder, but increasing the water injection temperature made the water distribution more uniform, and the peak values of each monitoring point were more consistent. The circulating work power increased with the increase of the water injection temperature. For emissions, as the temperature of the water injection increased, the emissions of soot and unburned hydrocarbons (UHCs) decreased, and NOx slightly increased.

  • effect of water injection on the knock combustion and emissions of a direct injection gasoline engine
    Fuel, 2020
    Co-Authors: Zhaolei Zheng, Tao Peng
    Abstract:

    Abstract A turbocharged downsizing spark ignition (SI) engine cooperating with in-cylinder direct injection Technology is one of the most effective ways to improve the fuel economy and to reduce the emissions of gasoline engines, but knock combustion limits the application and development of downsizing of SI engines in practice. In this research, a numerical simulation method was used to study the feasibility of in-cylinder direct water injection Technology to weaken the knock tendency of a turbocharged direct injection gasoline (GDI) engine and improve its combustion emission performance. First, the knock of a certain type of turbocharged direct injection gasoline engine was induced by increasing the spark timing, thereby determining the position at which the end mixture was spontaneously ignited. Then, at a given water injection moment, the influence of the amount of water injection on the knock and emissions of the turbocharged direct injection gasoline engine was investigated. The results show that the knock intensity gradually decreased with the increase of the water injection quality. For the cyclic work, the amount of circulating work decreased with the increase of the water injection quality. Water injection is beneficial for reducing the emissions of nitrogen oxides (NOX), carbon monoxide (CO), and unburned hydrocarbons (UHC). However, the soot emissions will increase as the amount of water injection increases.

Tao Peng - One of the best experts on this subject based on the ideXlab platform.

  • effect of water injection on the knock combustion and emissions of a direct injection gasoline engine
    Fuel, 2020
    Co-Authors: Zhaolei Zheng, Tao Peng
    Abstract:

    Abstract A turbocharged downsizing spark ignition (SI) engine cooperating with in-cylinder direct injection Technology is one of the most effective ways to improve the fuel economy and to reduce the emissions of gasoline engines, but knock combustion limits the application and development of downsizing of SI engines in practice. In this research, a numerical simulation method was used to study the feasibility of in-cylinder direct water injection Technology to weaken the knock tendency of a turbocharged direct injection gasoline (GDI) engine and improve its combustion emission performance. First, the knock of a certain type of turbocharged direct injection gasoline engine was induced by increasing the spark timing, thereby determining the position at which the end mixture was spontaneously ignited. Then, at a given water injection moment, the influence of the amount of water injection on the knock and emissions of the turbocharged direct injection gasoline engine was investigated. The results show that the knock intensity gradually decreased with the increase of the water injection quality. For the cyclic work, the amount of circulating work decreased with the increase of the water injection quality. Water injection is beneficial for reducing the emissions of nitrogen oxides (NOX), carbon monoxide (CO), and unburned hydrocarbons (UHC). However, the soot emissions will increase as the amount of water injection increases.

Xu Kai - One of the best experts on this subject based on the ideXlab platform.

  • On the Research Situation and Prospect of Gasoline Direct Injection Technology
    Journal of Jiangxi Blue Sky University, 2009
    Co-Authors: Xu Kai
    Abstract:

    This paper introduces some advantages of gasoline direct injection Technology(GDI)compared with port fuel injected system(PFI)and the research situation of the GDI engine by working status of layered control strategy,torque control strategy and injecting gasoline timing control strategy etc.It expounds some technical problems in the development of GDI engine and points out some new technological prospects of GDI.

Song Chuan-ping - One of the best experts on this subject based on the ideXlab platform.

  • New Technologies for Gas Fuel Engines(1)
    Internal combustion Engines, 2003
    Co-Authors: Song Chuan-ping
    Abstract:

    This paper introduces several new technologies for gas fuel engines;their primary principles and features.Available technologies for gas fuel engines include:the supercharged cooling Technology,the exhaust gas recirculation Technology,the catalytic oxidizing reduction Technology,the in-cylinder direct injection Technology,the layered inlet lean-burn Technology and the pre-combustion chamber Technology etc..

  • New Technologies for Gas Fuel Engines(2)
    Internal combustion Engines, 2003
    Co-Authors: Song Chuan-ping
    Abstract:

    This paper introduces several new technologies for gas fuel engines;their primary principles and features.Available tech-nologies for gas fuel engines include:the supercharged cooling Technology,the exhaust gas recirculation Technology,the catalytic oxidizing reduction Technology,the in-cylinder direct injection Technology,the layered inlet lean-burn Technology and the pre-combustion chamber Technology etc..

Chen Hong - One of the best experts on this subject based on the ideXlab platform.

  • Injection quantity control for GDI engines
    2013 25th Chinese Control and Decision Conference (CCDC), 2013
    Co-Authors: Guo Shuai, Xin Baiyu, Hu Yunfen, Chen Hong
    Abstract:

    To improve fuel economy and reduce emissions, direct injection Technology with precise fuel injections is widely used for gasoline engines, because quantitative precise fuel injection, as well as multi injection during one combustion revolution, is fit for the whole engine speed range. This paper designs a PID controller of fuel injection quantity for gasoline direct injection (GDI). Firstly, a mathematical model of an injector, which is used for controller validation, is established mainly based on fluid dynamic; Secondly, a map of fuel injection quantity corresponding with engine demands (according to engine speed and rail pressure) is calibrated by using the high-fidelity engine software enDYNA through experiments. Then, a PID controller is aimed to track the given value of fuel injection quantity. Tuning controller parameters are chosen by randomized algorithm according to the criteria of performance. Simulation results show that the designed control scheme is effective.