Implementation of Atkinson effect for improved fuel efficiency of Gasoline Engine using 1-D simulation software and its validation with experimental data Maruti Suzuki India, Limited

Format:

Book

Conference/Event

Author/Creator:

kadekar, amrutha, author.

Contributor:

Rani, Abha

Sarna, Nishant

Conference Name:

Symposium on International Automotive Technology (2021-09-29 : Pune, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

In order to meet the challenges of future CAFE regulations andpollutant emission, vehicle fuel efficiency must be improved uponwithout compromising vehicle performance. Optimization of enginebreathing and its impact on vehicle level fuel economy,performance needs balance between conflicting requirements ofvehicle Fuel Economy, performance and drivability. In this studya Port Fuel Injection, naturally aspirated small passenger cargasoline engine was selected which was being used in a typicalsmall passenger car. Simulation approach was used to investigatevehicle fuel economy and performance, where-in 1D CFD Engine modelwas used to investigate and optimize Valve train events (Intake andexhaust valve open and close timings) for best fuel economy. EngineSimulation software is physics based and uses a phenomenologicalapproach 0-D turbulent combustion model to calculate engineperformance parameters. Engine simulation model was calibratedwithin 95% accuracy of test data. This model is sufficient toanalyze the change in engine performance with change of valvetimings. Methodology similar to that of vehicle simulation softwaresuch as AVL Cruise to calculate Engine load distribution frequencyfor transient drive cycles. Vehicle was run for a regulatory drivecycle and equivalent Engine Part load points were obtained based onenergy distribution matrix of Engine. 1-D simulation model was runat these operating points for various combination of Intake andexhaust valve timings. Fuel consumption values from simulation wasused to calculated equivalent Vehicle Fuel economy. Impact ofindividually changing each valve timing on Fuel Economy wasassessed initially. Optimization of valve timings was carried outand after analysis Atkinson effect was observed at final timingposition. Intake valve closing was delayed which reducedcompression stroke. This reduced pumping effort at F.E relevantengine operating points and improved fuel consumption. Fuel economyof optimized proposal was validated against test vehicle. It waspossible to fix a Non-Variable Valve Timing (VVT) Valve trainwithout extensive hardware trials for desired performance

Notes:

Vendor supplied data

Publisher Number:

2021-26-0053

Access Restriction:

Restricted for use by site license