Low Engine Speed Torque Improvement in Natural Gas Engine: Experimental Observations
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ORIGINAL RESEARCH PAPER
Low Engine Speed Torque Improvement in Natural Gas Engine: Experimental Observations Pritesh J. Suple 1 & Chandrakant R. Sonawane 1
&
S. S. Thipse 2 & J. P. Mohite 3 & N. B. Chougule 3 & Anand Pandey 1
Received: 15 October 2019 / Revised: 11 August 2020 / Accepted: 15 August 2020 # Springer Nature Singapore Pte Ltd. 2020
Abstract Diesel engines have always been the first choice as prime movers for commercial vehicles since a long time. However, for the past 20 years, many cities have adopted natural gas–powered vehicles with an aim of reducing air pollution. Thereafter, natural gas–operated engines, have experienced rapid development. With the adoption of natural gas engines many newer technologies were integrated which effectively contributed for reducing engine emissions within target limits. However, with requirements for enhanced comfort features like an air conditioner, pneumatic door, and shock absorbers, and other electric accessories, commercial and passenger CNG vehicles need to have better traction. In many cases, the maximum vehicle speed is limited. The objective of this paper is to study, evaluate, and summarize various approaches, strategies, and technologies developed for enhancing the torque of the engine. Most of these are applicable for a complete range of engine speeds. Integrating them for improving torque at slow engine speeds is a core objective here. Experimental results of a specimen CNG engine are presented, which shows enhancement in the torque as well as engine power at slow engine speed region with turbocharged configurations. Keywords Compressed natural gas engine . Slow speed torque . Turbocharged natural gas engine
Introduction In today’s scenarios, we can find all sorts of vehicles: commercial, public transport, personal or private transport, etc., mainly driven by diesel or petrol engines as a prime mover. If we investigate the energy consumption by these vehicles, it can be observed that the share of personal vehicles for transport far exceeds that of public vehicle transport (Reddy 1995). It has also been demanded that for economic benefits, the trucks should be powered by alternate fuels as compared with conventional fuels (Parker and Pettijohn 1997). Heavy-duty vehicles and mass transport busses operating on natural gas will be the next milestone in reducing emissions (Frost and Sullivan 2016a). In emerging markets, original equipment
* Chandrakant R. Sonawane [email protected] 1
Mechanical Engineering Dept, Symbiosis Institute of Technology, Pune, India
2
Automotive Research Association of India, Pune, India
3
Tata Motors, Pune, India
manufacturers (OEMs) shall be integrating platform technology, in which minor changes to the base product will help to meet very large market requirements (Frost and Sullivan 2016b). It has also been predicted that the share of the small and light commercial vehicles will expand for the coming years (Khan et al. 2012). It has also been derived from the global powertrains scenario that the newly developed veh
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