Studies on an Air Assisted Gasoline Direct Injection System for a Two-Stroke Engine

2008 ◽  
Author(s):  
Srinivas Padala ◽  
Akshay Bansal ◽  
A. Ramesh
Keyword(s):  
Direct Injection ◽  
Gasoline Direct Injection ◽  
Injection System ◽  
Stroke Engine

Comparison of Stratified and Homogeneous Combustion in a Direct-Injected Two-Stroke Engine for Snowmobile Applications

2008 ◽  
Author(s):  
Justin Johnson ◽  
Karen R. Den Braven
Keyword(s):  
Fuel Economy ◽  
Direct Injection ◽  
Gasoline Direct Injection ◽  
Homogeneous Combustion ◽  
Unburned Hydrocarbons ◽  
Stratified Combustion ◽  
Operation Results ◽  
Stroke Engine

Gasoline direct injection (GDI) two-stroke engine technology has been developed for use in snowmobile applications. Applying GDI to a two-stroke engine significantly reduces emissions of unburned hydrocarbons and improves fuel economy by reducing or eliminating the short circuiting of fuel that occurs in conventional carbureted two-stroke engines. The GDI design allows for two different modes of combustion, stratified and homogeneous. Stratified combustion is typically used during idle and light to moderate loads at low engine speeds while homogeneous combustion is used at moderate to high loads and medium to high engine speeds. This work presents the process and results of determining which mode of combustion provides better fuel economy during cruise point operation, and where the transition from stratified to homogeneous combustion should occur in snowmobile operation. Results show that homogeneous calibration is the superior mode of combustion for the cruise points of a snowmobile.

Development of a New Injector in Gasoline Direct Injection System

2000 ◽  
Author(s):  
Shinji Ueda ◽  
Yukio Mori ◽  
Eiji Iwanari ◽  
Yoshitomo Oguma ◽  
Yousuke Minoura
Keyword(s):  
Direct Injection ◽  
Gasoline Direct Injection ◽  
Injection System

Analysis of the Low Pressure Circuit of a Gasoline Direct Injection System

MTZ worldwide ◽  
2016 ◽  
Vol 77 (2) ◽  
pp. 56-61
Author(s):  
Michael Spitznagel ◽  
Uwe Iben ◽  
Ronny Leonhardt ◽  
Michael Bargende
Keyword(s):  
Direct Injection ◽  
Low Pressure ◽  
Gasoline Direct Injection ◽  
Injection System

Two-Stroke Engine with Fuel Semi-Direct Injection Using FAI System

2011 ◽  
Vol 130-134 ◽  
pp. 796-799
Author(s):  
Ming Ming Wu ◽  
Yan Xiang Yang ◽  
Da Guang Xi ◽  
Ping Zhang ◽  
Zhong Guo Jin
Keyword(s):  
Gasoline Engine ◽  
Fuel Injection ◽  
Direct Injection ◽  
Injection System ◽  
Injection Timing ◽  
Fuel System ◽  
Power Performance ◽  
Fuel Injection Timing ◽  
Injection Quantity ◽  
Stroke Engine

This paper presents the feasibility of semi-direct injection on a 50cm3, two-stroke motorcycle gasoline engine, which is applied FAI semi-direct injection fuel system. The structure and fuel injection system is improved based on the original carburetor engine and the FAI injector is easily installed. The results of laboratory and drive test show that, compared with the original carburetor fuel system, through optimization calibration of fuel injection timing and injection quantity can improve power performance and fuel economy.

Evolution of Gasoline Direct Injection System for Reduction of Real Mode Emission

2019 ◽  
Author(s):  
Soichi Saitoh ◽  
Hitoshi Shibata ◽  
Masahiro Ookuma ◽  
Masahiro Shigenaga
Keyword(s):  
Direct Injection ◽  
Gasoline Direct Injection ◽  
Injection System ◽  
Real Mode

scholarly journals Modeling, Analysis and Simulation of a Gasoline Direct Injection System

2004 ◽  
Vol 37 (22) ◽  
pp. 273-278 ◽  
Author(s):  
E. Alabastri ◽  
L. Magni ◽  
S. Ozioso ◽  
R. Scattolini ◽  
C. Siviero ◽  
...  
Keyword(s):  
Direct Injection ◽  
Gasoline Direct Injection ◽  
Injection System ◽  
Modeling Analysis

Particulate Matter Emission Suppression Strategies in a Turbocharged Gasoline Direct-Injection Engine

2017 ◽  
Vol 139 (10) ◽  
Author(s):  
Zhang Ming ◽  
Zhong Jun ◽  
Capelli Stefano ◽  
Lubrano Luigi
Keyword(s):  
Particulate Matter ◽  
Emission Reduction ◽  
Direct Injection ◽  
Injection Pressure ◽  
Particle Emission ◽  
Gasoline Direct Injection ◽  
Injection System ◽  
Dominant Factor ◽  
Injection Timing ◽  
Wide Range

The development process of a down-sized turbocharged gasoline direct-injection (GDI) engine/vehicle was partially introduced with the focus on particulate matter (PM)/particle number (PN) emission reduction. To achieve this goal, the injection system was upgraded to obtain higher injection pressure. Two types of prototype injectors were designed and compared under critical test conditions. Combined numerical and experimental analysis was made to select the right injector in terms of particle emission. With the selected injector, the effect of injection parameters calibration (injection pressure, start of injection (SOI) timing, number of injection pulses, etc.) on PM/PN emission was illustrated. The number of fuel injection pulses, SOI timing, and injection pressure were found playing the leading role in terms of the particle emission suppression. With single-injection strategy, the injection pressure and SOI timing were found to be a dominant factor to reduce particle emission in warm-up condition and cold condition, respectively; a fine combination of injection timing and injection pressure is generally able to decrease up to 50% of PM emission in a wide range of the engine map. While with multiple injection, up to an order of magnitude PM emission reduction can be achieved. Several New European Driving Cycle (NEDC) emission cycles were arranged on a demo vehicle to evaluate the effect of the injection system upgrade and adjusted calibration. This work will provide a guide for the emission control of GDI engines/vehicles fulfilling future emission legislation.

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