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Modern day ECU controlled Compression Ignition Engine, with its lean burn combustion process and with advanced exhaust aftertreatment devices, is the most sought after IC engine today; Due to its low fuel consumption with lowest possible CO2 emissions. In order to meet these low emission targets, the compression ratio of many of these new generation Diesel engines are kept as low as low as 16:1. Lowering compression ratio has a negative effect on Engine cold start quality and warm-up. This paper summarizes experimental investigation conducted on an Inline 6 cylinder 5.7 liter Turbocharged Intercooled Direct Injection Diesel Engine with BOSCH Electronic Rotary Fuel Injection Pump (VP37) in a cold chamber to study the effect of injection parameters on combustion instability (and thereby on Cold Cranking), at different (sub-zero) ambient temperatures.

As part of transformation from BS4 to BS6 automobile emission standard in India, engine manufactures are focusing on continuous development of emission control technologies and suitable strategies. Exhaust tail pipe emission and Crankcase emission are added together to meet the regulation acceptable limit. The crankcase emissions contribute substantially to the total Particulate Matter (PM) emitted from an engine. Hence there is a need of design and development of suitable Crankcase ventilation system. This paper presents investigation of high PM contributed from Open Crankcase ventilation (OCV) system in Diesel engine and experiment based solutions.

An older generation 2V 6 cylinder diesel engine operating with max specific power of 20kW/l and 11.0MPa peak firing pressure was upgraded for higher peak firing pressure capability, higher specific power output and adaptation of a common rail fuel injection system. Key basic dimensions of the major components were retained to enable continued usage of existing fixed transfer line machining facility. The 2V /cyl configuration was retained. Thermodynamic simulations, Finite Element analysis of head, block gasket structure, connecting rod and main bearing walls were carried out. Analysis of the crankshaft torsional vibration system and bearings were performed. The bolting system and tightening methods were reviewed and modified. Theoretical calculations on coolant flow and lub oil flow requirements were done. Physical experiments were done to study the gasket sealing behavior, bore distortion.