Increasingly stringent emission regulations throughout the world mean that manufacturers have to pay more attention to emissions performance. Electronic engine management systems allow flexibility in controlling engine parameters & provide means for tuning engines for low emissions. In addition to this, to ensure that the vehicle is not violating emission standards, Emission on Board Diagnostic (EOBD) regulation has been introduced. EOBD limits will also become more stringent in future in-line with Emission limits. Mahindra was the first to adopt Common rail Application in India. Earlier Scorpio engine was with fuel injection system based on mechanical rotary pump compiling with Euro II norms. M&M engineers could make it Euro IV worthy. This paper explains how Mahindra & Mahindra responded to business need to meet legislative requirements. This paper also explains while the rest of the world is working with four valve DOHC engine with DPF, how Mahindra & Mahindra frugal engineering approach made it possible to meet Euro IV + EOBD. Paper gives a brief introduction of EOBD and its usage. It discusses how Euro IV emission targets were achieved and describes the work done during EOBD calibration. This includes strategy for application of the Malfunction Indicator Lamp (MIL). Emission tests with defective components were done and necessary correction maps were applicated, so as to ensure that the vehicle emissions are within EOBD limits. This approach has helped to maintain continuity of business in Europe which other wise one would have rejected developing Euro IV+ EOBD on 2 Valve, Push rod engine. To meet future norms, Mahindra & Mahindra (M&M) simultaneously started developing through contemporary enquiries with four valves per cylinder DOHC with variable geometry turbocharger and cascading hardware / algorithm requirements to take M&M to meet stringent Emission norms like Euro V and beyond meeting Tier 2 Bin5 (T2B5).
In quest of clean diesel: Indian automotive: Technology trends
Streben nach 'sauberen' Dieselfahrzeugen: Technologie-Trends für die indische Automobilindustrie
2007
9 Seiten, 6 Bilder, 5 Quellen
Conference paper
English
In quest of clean Diesel - Indian automotive technology trends
Automotive engineering | 2007
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