Design and Development of 1.4L IDI Diesel Engine

A new high performance 1.4 litre naturally aspirated IDI engine with advanced comet type precombustion chamber has been designed and developed within a duration of 2.5 years for Tata Minicar. The prototype could be developed in a short time of 8 months due to extensive use of CAD/CAM facilities and close interaction with suppliers along with simultaneous engineering methods. A power rating of 40.5 hp/lt could be achieved due to extensive optimisation of combustion parameters such as geometry of precombustion chamber and fuel injection parameters. This paper describes the features of this engine along with development strategy adopted to achieve the performance and durability targets.