An Investigation with Mechanical Supercharging as Boosting Solution on Less than 0.5 Liter Single Cylinder Diesel Engine towards Bharat Stage VI Emission Development

Bhat, Prasanna G; Pawar, N. V.; Narwade, Dadarao; Nalawade, Santosh; Gayen, Hirak Jyoti; Marathe, N. V.; Chopane, Sanjay Parshuram

doi:10.4271/2019-26-0152

Cited by 8 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The boundary conditions for intake and exhaust pipe wall temperatures were also taken as 30°C, and the conditions were maintained as isothermal. At each measuring point depicted in the simulation models in Figures 3 and 4, the temperatures were simulated considering the equation of state (3). It can be noted that the supercharged engine, depicted in Figure 4, employed an intercooler between the supercharger and the cylinder to reduce the temperature of the compressed air to 30°C.…”

Section: Simulation Studies Of Na and Supercharged Enginementioning

confidence: 99%

A novel layout to charge a single cylinder diesel engine using supercharging and impulse turbo-compounding

Ramkumar

Krishnasamy

Ramesh

2023

International Journal of Engine Research

View full text Add to dashboard Cite

The benefits of turbocharged internal combustion engines are well established in the literature and mass production. Despite the numerous advantages of turbocharging, commercial single-cylinder engines are generally not turbocharged. This is due to intermittent exhaust gas flow to the turbine, typical for a single-cylinder engine. The current work proposes a novel layout wherein a supercharger boosts the engine to reap the benefits of charging the single-cylinder engine. An impulse turbine salvages part of the exhaust energy from the pulsated flow. A one-dimensional simulation study of the novel supercharged and turbo-compounded single-cylinder engine was carried out, and critical parameters of an impulse turbine were designed. CFD simulation study was carried out to validate the performance of the impulse turbine and the novel layout. This study modified a light-duty naturally aspirated (NA) diesel engine currently in mass production into the supercharged version. A positive displacement supercharger was mechanically coupled to the base NA engine with a suitable belt drive, and steady-state experiments were performed with NA and supercharged versions. One-dimensional AVL boost simulation models were validated for the NA and supercharged engines for brake power, air flow rate and BSFC within a 3% deviation. Nozzles of varying exit diameters were employed at the exhaust pipe. One-dimensional simulations were conducted to predict the supercharged engine performance and the kinetic energy rate available at the exhaust nozzle exit. An optimal nozzle exit diameter was chosen. Base calculations for the impulse turbine were performed with the output from the 1D simulation tool to design the critical features of the blade and the power turbine. The designed impulse turbine was further simulated using a commercially available CFD simulation tool, CONVERGE. CFD results showed that the impulse turbine generated about 1.55 kW of power, equivalent to 39% turbine efficiency. Experimental analysis was conducted on the supercharged engine with the optimal nozzle and the simulated impulse turbine. Results showed significantly improved engine performance with the supercharged and impulse turbine compounded version compared to the base NA version. The brake power output and brake thermal efficiency increased by 34% and 3.8%, respectively. Soot and carbon monoxide (CO) emissions were 80% lower, while unburned hydrocarbon (HC) emissions were 45% lower. However, NOx emissions were 60% higher, which can be curtailed by established NOx reduction strategies. Thus, the proposed method of employing a supercharger and compounding an impulse turbine for a single-cylinder diesel engine proved beneficial with improved performance, reduced brake specific fuel consumption and reduced emissions except for NOx.

show abstract

Section: Simulation Studies Of Na and Supercharged Enginementioning

confidence: 99%

A novel layout to charge a single cylinder diesel engine using supercharging and impulse turbo-compounding

Ramkumar

Krishnasamy

Ramesh

2023

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…3 The major problems identified in small single-cylinder engines include difficulties balancing the inertial forces and turbocharging. 4 Since the application of such engines is also geographically restricted, worldwide research efforts on small engines are limited. 5 Thus, turbocharging of single-cylinder engines has not been given due attention and research focus.…”

Section: Introductionmentioning

confidence: 99%

“…Mechanically driven positive displacement superchargers were employed to achieve the required boost in a few cases to overcome the problems with turbocharging. 4,21 A significant increase in the torque and power was realized with supercharging. However, there was an associated increase in the brake-specific fuel consumption (BSFC), especially at high engine speeds, due to the supercharger's additional power requirements.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A novel method to overcome the shortcomings of turbocharging a single cylinder diesel engine

Ramkumar

Krishnasamy

Ramesh

2021

International Journal of Engine Research

View full text Add to dashboard Cite

Single-cylinder diesel engines are generally not turbocharged because of highly pulsating exhaust gas flow, resulting in increased speed fluctuations and reduced turbine performance. In the present work, a novel and simple method is proposed wherein an exhaust plenum is placed before the turbine to reduce the flow fluctuations. A production light-duty naturally aspirated (NA) diesel engine modified into the turbocharged version was incorporated with an exhaust plenum. Steady-state experiments were performed with the base naturally aspirated engine, the turbocharged version without an exhaust plenum (conventional pulse turbocharging), and the turbocharged version with the exhaust plenum. The present work attempts to establish the limitations of conventional pulse turbocharging in a single-cylinder diesel engine unavailable in the existing literature. Though the conventional pulse turbocharged version could deliver a boost pressure of about 2 bar (absolute), a brake power reduction of 40% and the associated drop in brake mean effective pressure was observed compared to the base NA engine due to high exhaust back pressures. The pumping work was four times higher in conventional pulse turbocharging than the NA engine, thus reducing the performance. After validating the simulation models, a one-dimensional simulation tool was used to evaluate the effect of incorporating exhaust plenum before the turbine. Simulated results predicted the brake power output within a 3% error for the NA and plenum turbocharging configurations. An optimal plenum volume was arrived at using the validated simulation model. Subsequent experiments on the turbocharged engine with the plenum in place showed a significant improvement in the engine performance and reduced exhaust emissions compared to the NA version. Brake power output was enhanced by 25%, which indicated improved thermal efficiency of 2%. Compared to the NA version, the soot, carbon monoxide (CO) and unburned hydrocarbon HC emissions were reduced by 93%, 88%, and 53%, respectively. However, an increase in oxides of nitrogen (NOx) emissions was seen, which can be controlled with suitable mitigation methods taking advantage of the significantly lower soot levels. Thus, the proposed method of placing an exhaust plenum before the turbine makes turbocharging viable on single-cylinder diesel engines with performance improvement and emission reduction when suitable NOx mitigation measures are adopted.

show abstract

“…The turbocharger technology was not found suitable for a single-cylinder diesel engine as in single cylinder engines, the intake valve is remain closed when exhaust valve is open. 29 Recently, Buchman et al 30 have effectively implemented the turbocharger technology for a singlecylinder diesel engine with the help of an air capacitor and patented his work. The air capacitor acted like storage for exhaust gas and supplied the same during the suction stroke of each cycle.…”

Section: Introductionmentioning

confidence: 99%

Effect of a turbocharger and EGR on the performance and emission characteristics of a CRDI small diesel engine

Dond¹,

Gulhane²

2021

Heat Trans

View full text Add to dashboard Cite

Limited fuel capacity and pollution are major concerns in the automobile industry. Methods to tackle these issues are continuously being investigated. The present work represents the experimental evaluation of a turbocharger and exhaust gas recirculation's (EGR's) combined effect on the common rail direct injection (CRDI) small diesel engine's performance and emission attributes. The fuel handling CRDI system variables, such as injection pressure, split injection timing, and fuel injection quantity along with EGR and turbocharger technology were considered for the study. Experiments were conducted with and without EGR and turbocharger conditions. Efforts are made to correlate the performance and emission characteristics with and without EGR and turbochargers. A combination of turbocharger and EGR shows much more lowering in nitrogen oxides, carbon monoxide, and hydrocarbon emission at the cost of a slight rise in smoke percentage. The thermal efficiency and fuel economy of the engine show a significant improvement for the turbocharger system. Overall, turbocharger and EGR combinations positively impact the engine

show abstract

An Investigation with Mechanical Supercharging as Boosting Solution on Less than 0.5 Liter Single Cylinder Diesel Engine towards Bharat Stage VI Emission Development

Cited by 8 publications

References 5 publications

A novel layout to charge a single cylinder diesel engine using supercharging and impulse turbo-compounding

A novel layout to charge a single cylinder diesel engine using supercharging and impulse turbo-compounding

A novel method to overcome the shortcomings of turbocharging a single cylinder diesel engine

Effect of a turbocharger and EGR on the performance and emission characteristics of a CRDI small diesel engine

Contact Info

Product

Resources

About