Extension of the Lean Limit of Gasoline Engines Under Part L oad by U sing Hot Surface Assisted Spark Ignition (HSASI)
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20229051
- Paper/Info type
- SETC
No.2022-32-0051
- Pages
- 1-11(Total 11 p)
- Date of publication
- Oct 2022
- Publisher
- JSAE
- Language
- English
- Event
- SETC2022
Detailed Information
| Author(E) | 1) Sascha Holzberger, 2) Maurice Kettner, 3) Roland Kirchberger |
|---|---|
| Affiliation(E) | 1) University of Applied Sciences Karlsruhe, 2) Graz University of Technology, 3) Graz University of Technology |
| Abstract(E) | Charge dilution by lean-burn is one way to increase the efficiency of spark ignition engines while reducing NOx emissions. This work focuses on increasing the flammability of lean mixtures inside a passive pre-chamber spark plug by elevating its temperature with the help of a controllable hot surface integrated into the pre-chamber. Thus, an extension of the lean limit under part load is aimed for. A pre-chamber spark plug prototype with an integrated, controllable glow plug was developed, called Hot Surface Assisted Spark Ignition (HSASI). Experimental investigations were conducted on a single-cylinder engine at the Karlsruhe University of Applied Sciences. Operating modes with an active glow plug (HSASI) and a non-active glow plug were compared. The lean limit for both operation modes were determined under part load. NOx, CO and THC emissions were measured for different air-fuel equivalence ratios λ. The lean limit is extended by more than 0.1 in λ at low loads with HSASI operation. At constant λ, lower CO and THC emissions are achieved under HSASI operation than in operation with a non-active glow plug. NOx-emissions are higher with an active glow plug at lower λ and align with higher λ. HSASI operation shows higher combustion stability, as combustion in the pre-chamber is accelerated and flame quenching in the pre-chamber is reduced. |
