Title: Light Duty Engine Performance Characteristics with Dimethyl Ether and Propane

Journal Article · · SAE Technical Paper Series
 [1];  [1];  [2];  [2];  [2]
  1. WM International Engineering LLC, Lisle, IL (United States)
  2. Illinois Institute of Technology, Chicago, IL (United States)
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Here, this paper explores the performance characteristics of a compression ignition HYUNDAI 2.2L engine operating with Dimethyl Ether (DME). Test are carried out at three operating conditions that weigh heavily in the FTP75 certification cycle (1000rpm-12Nm, 1500rpm-50Nm, 2000rpm-100Nm). The engine features a high-pressure common rail fuel injection system designed to operate with liquified gases. The main component of the fuel system is a high-pressure pump that incorporates an electronic inlet metering valve commanded on a crank-angle base to control the rail pressure. The pump, which requires no pressure regulator, provides the flow needed to the injectors without flow returning to the inlet. This novel fueling system is leveraged in tests that are conducted to examine the impact of EGR, combustion phasing, injection pressure on efficiency and emissions. In addition, the impact of introducing 15% Propane by mass is examined. During the tests, the engine ECU is aided by an Engine Controller High Speed Oversight unit (ECHO) to provide combustion phasing control, improved cylinder-to-cylinder uniformity, and an effective optimization over the testing effort. The use of DME and Propane allowed for peak thermal efficiency of nearly 43%. These fuels enable significant carbon index (CI) reductions over the baseline Diesel fuel, with indications that 50% reduction in CO2 over the Diesel engine are possible.

Research Organization:
WM International Engineering LLC, Lisle, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0009878
OSTI ID:
2572049
Journal Information:
SAE Technical Paper Series, Journal Name: SAE Technical Paper Series Vol. 2024; ISSN 0148-7191; ISSN 2688-3627
Publisher:
SAE InternationalCopyright Statement
Country of Publication:
United States
Language:
English

References (11)

Injection strategy for simultaneous reduction of NOx and soot emissions using two-stage injection in DME fueled engine journal April 2015
Effect of n-Butane and propane on performance and emission characteristics of an SI engine operated with DME-blended LPG fuel journal April 2011
An investigation of the effects of spray angle and injection strategy on dimethyl ether (DME) combustion and exhaust emission characteristics in a common-rail diesel engine journal November 2010
Dimethyl ether (DME) as an alternative fuel journal June 2006
Effects of High EGR Rate on Dimethyl Ether (DME) Combustion and Pollutant Emission Characteristics in a Direct Injection Diesel Engine journal October 2013
Compression Ignition Delay (Physical + Chemical) of Dimethyl Ether - An Alternative Fuel for Compression-Ignition Engines conference March 2003
Engine Performance and Emission Characteristics of DME Diesel Engine With Inline Injection Pump Developed for DME conference June 2004
DME as Alternative Diesel Fuel: Overview conference November 2006
Fuel Injection Strategy for Reducing NOx Emissions from Heavy-Duty Diesel Engines Fueled with DME conference October 2006
Development of a High-Pressure Fuel Injection System for Use with Propane-DME conference April 2023
High Speed Data Acquisition for Real Time Feedback in a Light Duty Engine Combustion-Mode Switching Application conference April 2023

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33 ADVANCED PROPULSION SYSTEMS
combustion
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dimethyl ether
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fuel injection
fuel systems