Simulation based approach to improve the engine oil warmup behavior using exhaust gas during NEDC cycle Mahindra and Mahindra Limited

Format:

Book

Conference/Event

Author/Creator:

Krishnan, Karthikeyan N., author.

Contributor:

Elumalai, Sakthivel

M, Vikramraj

Ramadandi, Padmavathi

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:

During the cold start conditions engine must overcome higherfriction loss, at the cost of fuel penalty till the optimumtemperatures are reached in coolant and lubrication circuits. Thelower thermal capacity of the lubrication oil (with respect to thecoolant) inverses the relation of viscosity with temperature,improves engine thermal efficiency benefit. Engine oil takes fullNEDC test cycle duration to reach 90°C. This leads to higherfriction loss throughout the test cycle, contributing a significantincrease in fuel consumption. Increasing oil temperature reducesviscosity, thereby reducing the engine friction. This helps toidentify the focus for thermal management in the direction ofspeeding up the temperature rise during a cold engine starting.This work aims at the study and experiment of an exhaust recoverymechanism to improve the NEDC fuel economy. The objective of thework is to use the exhaust gas energy, post after treatment systemto heat up the engine oil temperature. The work was carried in 3stages, In the first stage, 1D system level simulation wasperformed to identify the suitable diameter and location to tap theexhaust gas from the main line. In the second stage, 3D CFDtransient flow and heat transfer simulations were performed tooptimize the flow and to design the heat exchanger for enhancedheat transfer. In the third stage, the concept is experimentallyvalidated for waste heat recovery and the resultant fuel economybenefits that could be achieved with the current solution. Thispaper provides a novel simulation-based approach using a 1D and3D CFD commercial code to calculate the fuel economy benefits. Theoptimal heat exchanger and flow path design provides us with an 4%improvement in fuel economy

Notes:

Vendor supplied data

Publisher Number:

2021-26-0422

Access Restriction:

Restricted for use by site license