Development of the next generation medium-duty natural gas engine

Technical Report · Mon Feb 28 04:00:00 EST 2000

DOI:https://doi.org/10.2172/753777· OSTI ID:753777

Podnar, D J; Kubesh, J T

This report summarizes the work done under this subcontract in the areas of System Design, System Fabrication, and Experimental Program. The report contains the details of the engine development process for achieving throttleless stratified charge spark ignition (SI) engine operation as well as advanced turbocharging strategies. Engine test results showing the potential of the direct-injection stratified charge combustion strategy for increasing part-load engine efficiency on a John Deere 8.1-liter natural gas engine are also included in this report. In addition, steady state and step transient engine data are presented that quantify the performance of a variable geometry turbocharger (VGT) as well as a modified waste-gated turbocharger on the engine. The benefits of the technologies investigated during this project will be realized in the form of increased drive-cycle efficiency to diesel-like levels, while retaining the low emissions characteristics of a lean-burn natural gas engine.

• Research Organization: National Renewable Energy Lab., Golden, CO (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC36-99GO10337
• OSTI ID: 753777
• Report Number(s): NREL/SR-540-27503
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
33 ADVANCED PROPULSION SYSTEMS
ADVANCED TURBOCHARGING
DIRECT-INJECTION
ENERGY EFFICIENCY
ENGINE EFFICIENCY
FUEL INJECTION SYSTEMS
FUEL SUBSTITUTION
MEDIUM-DUTY ENGINE
NATURAL GAS
NATURAL GAS ENGINE
SPARK IGNITION ENGINES
STRATIFIED CHARGE SPARK IGNITION(SI)ENGINE OPERATION
TURBOCHARGERS
VGT