ANALYSIS OF A NEW WATER HAMMER GASOLINE DIRECT INJECTION SYSTEM (WH-GDIS)

2001 ◽  
Author(s):  
C.M. Bartolini ◽  
F. Caresana ◽  
G. Vincenzi
Keyword(s):  
Direct Injection ◽  
Water Hammer ◽  
Gasoline Direct Injection ◽  
Injection System

Beneficial Use of Water Hammer in a Gasoline Direct Injection System

2003 ◽  
Author(s):  
C. M. Bartolini ◽  
F. Caresana ◽  
L. Pelagalli
Keyword(s):  
Internal Combustion Engines ◽  
Ad Hoc ◽  
Gasoline Engine ◽  
Fluid Dynamic ◽  
Direct Injection ◽  
Water Hammer ◽  
Gasoline Direct Injection ◽  
Injection System ◽  
Numerical Code ◽  
High Pressure Pump

This paper reports on the study of an injection system for internal combustion engines that exploits a water hammer oscillating circuit as the high pressure pump. This concept has recently been developed by the authors and successfully used in a direct-injection two-stroke gasoline engine prototype. The fluid dynamic behavior is characterized by unsteady flow in high length/diameter ratio pipes and is dominated by water hammer and cavitation. A numerical code was developed to gain a better understanding of these complex phenomena and as an optimization tool. The flow in the piping was solved by means of a 1D model suitable to describe the cavitation and unsteady friction. An ad hoc experimental analysis was performed to demonstrate model consistency in simple test cases of cavitating and non-cavitating flows. The model was then used in a numerical code for the simulation of the whole water hammer injection plant.

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

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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