Browse Publications Technical Papers 2013-01-1152

Design of DME-Diesel Fuel Supply System for Non-Gasification 2013-01-1152

As efficient and low-pollution alternative fuel, dimethyl ether (DME) has shown its excellent performance of combustion and emissions. There is a phenomenon of DME gasification in the in-line fuel pump of DME-diesel engine. DME gasification can result in “vapor lock” and serious inequality of the fuel supply in DME-diesel fuel system.
This paper presents a simple solution to improve DME gasification in DME-diesel fuel system. The key feature of the solution is just a bypass check valve, which is assembled between the intake fuel supply and the plunger chamber of the in-line pump. DME gasification in the in-line pump can be effectively eliminated by means of the bypass valve design.
The feasibility of the solution design is validated against AVL-HYDSIM simulations of both fuel systems, including the baseline of DME-diesel duel fuel system and the fuel system with the bypass check valve, on factors such as intake fuel pressure, DME content ratio, engine speed, DME vapor pressure and so on.
The research shows that (1) the design of the bypass check valve is one solution to eliminate DME gasification in the in-line pump fuel-injection system, and (2) DME gasification is inevitable in the plunger chamber of the in-line pump due to the powerful vacuum suction of the plunger, and (3) there is less effect of intake fuel pressure and DME fuel content ratio on the elimination of the gasification in the in-line pump, because the cause of DME gasification is the structure of the plunger and barrel assembly in the in-line pump fuel-injection system.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Operability and Compatibility Characteristics of Advanced Technology Diesel Fuels: Pump Evaluations


View Details


Flow Simulation of a Direct-Injection Gasoline Diaphragm Fuel Pump with Structural Interactions


View Details


The Effects of Fuel Composition, System Design, and Operating Conditions on In-System Vaporization and Hot Start of a Liquid-Phase LPG Injection System


View Details