Experimental Investigation on CNG-Diesel Combustion Modes under Highly Diluted Conditions on a Light Duty Diesel Engine with Focus on Injection Strategy

2015 ◽  
Vol 8 (5) ◽  
pp. 2177-2187 ◽  
Author(s):  
Pablo Garcia ◽  
Per Tunestal
Author(s):  
Stephen Busch ◽  
Stanislav V. Bohac ◽  
Dennis N. Assanis

New diesel combustion modes face difficult challenges with respect to engine-out emissions and transient behavior. Transitions between lean conventional diesel combustion and lean, premixed, low-temperature diesel combustion are investigated with an automotive diesel engine. Effects of fuel pressure on transitional cycles are investigated. Cycle-by-cycle heat release analysis is performed and an exhaust mass flow model is used to obtain cycle-averaged NO concentrations. The behavior of combustion progression and NO emissions during the transitions are discussed. Observed cool-flame separation behavior is identified and explained.


2013 ◽  
Author(s):  
Jyotirmoy Barman ◽  
Sumit Arora ◽  
Akhilesh Shukla ◽  
Rizwan Khan ◽  
Ashish Moholkar

Author(s):  
Stephen Busch ◽  
Stanislav V. Bohac ◽  
Dennis N. Assanis

New diesel combustion modes face difficult challenges with respect to engine-out emissions and transient behavior. Transitions between lean conventional diesel combustion and lean, premixed, low-temperature diesel combustion are investigated with an automotive diesel engine. Effects of fuel pressure on transitional cycles are investigated. Cycle-by-cycle heat release analysis is performed and an exhaust mass flow model is used to obtain cycle-averaged NO concentrations. The behavior of combustion progression and NO emissions during the transitions is discussed. Observed cool-flame behavior is identified and explained.


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