Demonstration of Fuel Economy Benefit of Friction Modifier Additives via Fuel-to-Lubricant Transfer in Euro-5 Gasoline Fleet

2013 ◽  
Vol 6 (3) ◽  
pp. 677-690 ◽  
Author(s):  
Sarah M. Remmert ◽  
Alison Felix-Moore ◽  
Steven R. Nattrass ◽  
Ian Buttery ◽  
Pauline Ziman ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Friction Modifier ◽  
Lubricant Transfer ◽  
Economy Benefit

scholarly journals Fuel economy benefit analysis of pass-at-green (PaG) V2I application on urban routes with STOP signs

2020 ◽  
Vol 83 (2/3/4) ◽  
pp. 258
Author(s):  
Levent Guvenc ◽  
Bilin Aksun Guvenc ◽  
Ozgenur Kavas Torris ◽  
Mustafa Ridvan Cantas ◽  
Sukru Yaren Gelbal
Keyword(s):  
Fuel Economy ◽  
Benefit Analysis ◽  
Economy Benefit

Fuel economy benefit of Active Grille Shutters for real world, WLTP and RDE cycles

2021 ◽  
Author(s):  
Salvio Chacko ◽  
Dimitri Kalifronas ◽  
Jesus Simon ◽  
Carlos Alonso ◽  
Antonio Solimene
Keyword(s):  
Fuel Economy ◽  
Real World ◽  
Economy Benefit

Experimental and Theoretical Study of Instantaneous Engine Valve Train Friction

2003 ◽  
Vol 125 (3) ◽  
pp. 628-637 ◽  
Author(s):  
Riaz A. Mufti ◽  
Martin Priest
Keyword(s):  
Engine Speed ◽  
Gasoline Engine ◽  
Elastohydrodynamic Lubrication ◽  
Friction Model ◽  
Friction Torque ◽  
Operating Conditions ◽  
Valve Train ◽  
Friction Modifier ◽  
Timing Belt ◽  
Economy Benefit

A new method has been developed to directly measure valve train friction as a function of crank angle using specially designed timing belt pulley torque transducers fitted to the inlet and exhaust camshafts of a single-cylinder gasoline engine. Simultaneous and instantaneous friction torque of both the inlet and exhaust camshafts at any engine speed can be measured, with no apparent detrimental effect of timing belt loading on the output reading. Experiments are reported for valve train friction at a range of motored engine operating conditions with different lubricant formulations, with and without a friction modifier. These are compared with the predictions of an existing valve train friction model based upon elastohydrodynamic lubrication theory. Measured friction decreased with increasing engine speed but increased with increasing oil temperature and the fuel economy benefit of friction modifiers was observed. The model yielded similar magnitudes of friction at medium engine speeds and above but predicted much lower friction with high oil temperatures at low speed. Comparison of theory and experiments also suggests that some oil may leak from hydraulic lash adjusters during the cam event with a consequent reduction in geometric torque.

Fuel economy benefit analysis of pass-at-green (PaG) V2I application on urban routes with STOP signs

2020 ◽  
Vol 83 (2/3/4) ◽  
pp. 258
Author(s):  
Ozgenur Kavas Torris ◽  
Mustafa Ridvan Cantas ◽  
Sukru Yaren Gelbal ◽  
Bilin Aksun Guvenc ◽  
Levent Guvenc
Keyword(s):  
Fuel Economy ◽  
Benefit Analysis ◽  
Economy Benefit

A Parametric Study of an Exhaust Recovery Turbogenerator on a Diesel-Electric Hybrid Bus

2013 ◽  
Author(s):  
Ian Briggs ◽  
Geoffrey McCullough ◽  
Stephen Spence ◽  
Roy Douglas ◽  
Richard O’Shaughnessy ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Parametric Study ◽  
Fuel Prices ◽  
Engine Model ◽  
Toxic Emissions ◽  
Exhaust Line ◽  
In Series ◽  
Hybrid Bus ◽  
Economy Benefit

The fuel consumption of automotive vehicles has become a prime consideration to manufacturers and operators as fuel prices continue to rise steadily, and legislation governing toxic emissions becomes ever more strict. This is particularly true for bus operators as government fuel subsidies are cut or removed. In an effort to reduce the fuel consumption of a diesel-electric hybrid bus, an exhaust recovery turbogenerator has been selected from a wide ranging literature review as the most appropriate method of recovering some of the wasted heat in the exhaust line. This paper examines the effect on fuel consumption of a turbogenerator applied to a 2.4-litre diesel engine. A validated one-dimensional engine model created using Ricardo WAVE was used as a baseline, and was modified in subsequent models to include a turbogenerator downstream, and in series with, the turbocharger turbine. A fuel consumption map of the modified engine was produced, and an in-house simulation tool was then used to examine the fuel economy benefit delivered by the turbogenerator on a bus operating on various drive-cycles. A parametric study is presented which examined the performance of turbogenerators of various size and power output. The operating strategy of the turbogenerator was also discussed with a view to maximising turbine efficiency at each operating point. The performance of the existing turbocharger on the hybrid bus was also investigated; both the compressor and turbine were optimised and the subsequent benefits to the fuel consumption of the vehicle were shown. The final configuration is then presented and the overall improvement in fuel economy of the hybrid bus was determined over various drive-cycles.

Applications of VVT and VCR on Fuel Economy Improvement Based Engine Electronic Control

2004 ◽  
Author(s):  
Zhengmao Ye ◽  
Ming-Chia Lai
Keyword(s):  
Fuel Economy ◽  
Gasoline Engine ◽  
Fuel Injection ◽  
Engine Performance ◽  
Performance And Emission ◽  
Fuel Economy Improvement ◽  
Operating Regions ◽  
Economy Benefit ◽  
Variable Valve ◽  
Maximal Benefit

Variable valve timing (VVT) and variable compression ratio (VCR) are two technologies to obtain fuel economy benefit. On the other hand, there is a tradeoff among fuel economy, engine performance and emission levels. Advantages of two technologies vary a lot on different engine operating regions. Recently some experiments are conducted on a Port Fuel Injection (PFI) engine in a city drive cycle to investigate the fuel economy impact from VVT, VCR and the technology integration. The testing results show clearly that the synergy of two technologies has further improved the fuel economy, while suitable operating regions need to be determined where the maximal benefit can be achieved. A typical 1.8L four-cylinder gasoline engine is used for experiments using VVT and VCR technologies for fuel economy improvement. The objective is to create a synergy scheme for the optimal fuel economy performance. The supercharged testing engine with VVT and VCR can implement similar performance to that of a larger replacement engine. The fuel economy optimization problem is simply converted into searching for the lowest engine power output region with respect to the same fuel economy improvement level. These optimal points are useful to determine potential best fuel economy operating regions whether VVT and VCR should be implemented individually or combined together.

Sign in / Sign up

Export Citation Format

Share Document