Performance Aspects of Stratified Charge Gasoline Direct Injection (GDI) Engine on Lean Limit Operation
Author(s):
Rajkumar P, P. Prithiv Raj , K. Kumaravel , B. Prem Anand
Keywords:
Air Fuel Ratio, AFR, Exhaust Emission, GDI Engine, Gasoline Direct Injection, Lean Limit Extension, Maximum Brake Torque Timing, Injection Timing, MBT Operating Variables, Spark Advance, SOI.
Abstract
– The major parameters that affect spark ignition engine performance, efficiency and emissions are compression ratio, injection timing and mixture composition. To prevent the knock, the compression ratio of gasoline engine cannot be increased beyond 12:1. For the same engine volume increasing the volumetric efficiency raises fuel economy and engine power output. An extensive research work was focused on air fuel ratio and injection timing of a gasoline direct injection engine to evaluate its influence on lean operating limit and performance features of the engine on stratified charge mode operation. A modified engine and a customized fuel injection module were developed for the proposed task. A test matrix of variable spark timing from 14 to 20 degree bTDC, air fuel ratio beyond stoichiometric and variable injection timing from 60 to 140 bTDC at compression stroke was implemented. The experimental results showed that the maximum brake torque timing, air fuel ratio and injection timing were implied significant influence on lean limit operation, fuel economy and exhaust emission reductions. The test report revealed that the developed engine attained lean limit at air fuel ratio 16.7 without affecting speed fluctuations. A module of air fuel ratio 16.7, SOI 100 degree with MBT 18 degree bTDC was identified as a most suitable operating variable for stratified charge gasoline direct injection operation. Reduction of fuel consumption, HC, CO and NOx was observed 15.62%, 83.33%, 14.28%, and 31.08% respectively with reference to the SOI 100 degree bTDC at AFR 16.7 compared with baseline PFI engine operating AFR 14.7.
Article Details
Unique Paper ID: 152275

Publication Volume & Issue: Volume 8, Issue 2

Page(s): 884 - 891
Article Preview & Download


Share This Article

Conference Alert

NCSST-2021

AICTE Sponsored National Conference on Smart Systems and Technologies

Last Date: 25th November 2021

SWEC- Management

LATEST INNOVATION’S AND FUTURE TRENDS IN MANAGEMENT

Last Date: 7th November 2021

Go To Issue



Call For Paper

Volume 8 Issue 4

Last Date 25 September 2021

About Us

IJIRT.org enables door in research by providing high quality research articles in open access market.

Send us any query related to your research on editor@ijirt.org

Social Media

Google Verified Reviews

Contact Details

Telephone:6351679790
Email: editor@ijirt.org
Website: ijirt.org

Policies