F 1 2014 : Turbocharged and Downsized Ice and Kers Boost
The paper discusses the FIA’s World Motor Sport Council (WMSC) new regulations for F1 power trains. The new regulations will see the 2.4 liter V8s currently used replaced by 1.6 liter V6s engines starting in 2014. The power units will have high pressure gasoline direct injection up to 500 bar. Engine speed limits on the new engines will be reduced from the current 18,000 rpm to a maximum of 15,000 rpm. The more environmentally-friendly units will be supported by augmented power output of the engine via energymanagement and energy-recovery systems. The paper discusses the possible performances the novel F1 cars could achieve with these novel engines and kinetic energy recovery systems, as well as the declared goal of making the F1 racing greener, the relevance of F1 to road cars, and finally the use of resource restrictions in F1. The major issue with new F1 rules is not just the total cost of research and development within the budget, but the ability to make the most out of the investment made for a more sustainable and greener road transport. The proposed high torque 475 kW 1.6 liter V6 turbo engine coupled with the proposed small 0.3 MJ 120 kW mechanical KERS may permit fuel savings of 40% vs. today’s low torque 525 kW 2.4 liters V8 naturally aspirated and even better driving performances on the most part of the race tracks.
Coupling of a KERS power train and a downsized 1.2TDI diesel or a 1.6TDI-JI h2 engine for improved fuel economies in a compact car
Recovery of braking energy during driving cycles is the most effective option to improve fuel economy and reduce green house gas (GHG) emissions. Hybrid electric vehicles suffer the disadvantages of the four efficiency reducing transformations in each regenerative braking cycle. Flywheel kinetic energy recovery systems (KERS) may boost this efficiency up to almost double values of about 70% avoiding all four of the efficiency reducing transformations from one form of energy to another and keeping the vehicle's energy in the same form as when the vehicle starts braking when the vehicle is back up to speed. With reference to the baseline configuration with a 1.6 liters engine and no recovery of kinetic energy, introduction of KERS reduces the fuel usage to 3.16 liters per 100 km, corresponding to 82.4 g of CO 2 per km. The 1.6 liters Turbo Direct Injection (TDI) Diesel engine without KERS uses 1.37 MJ per km of fuel energy, reducing with KERS to 1.13 MJ per km. Downsizing the engine to 1.2 liters as permitted by the torque assistance by KERS, the fuel consumption is further reduced to 3.04 liters per 100 km, corresponding to 79.2 g of CO 2 per km and 1.09 MJ per km of fuel energy. These CO 2 and fuel usage values are 11% and 13% better than those of today's highest fuel economy hybrid electric vehicle. The car equipped with a 1.6 liter Turbo Direct Injection Jet Ignition (TDI-JI) H 2 ICE engine finally consumes 8.3 g per km of fuel, corresponding to only 0.99 MJ per km of fuel energy.
Performance and combustion characteristics of a direct injection SI hydrogen engine
Abstract Hydrogen with low spark-energy requirement, wide flammability range and high burning velocity is an important candidate for being used as fuel in spark-ignition engines. It also offers CO2 and HC free combustion and lean operation resulting in lower NO x emissions. However, well examined external mixing of hydrogen with intake air causes backfire and knock especially at higher engine loads. In addition, low heating value per unit of volume of hydrogen limits the maximum output power. In this study, attention was paid to full usage of hydrogen advantage employing internal mixing method. Hydrogen was directly injected into cylinder of a single-cylinder test engine using a high-pressure gas injector and effects of injection timing and spark timing on engine performance and NO x emission were investigated under wide engine loads. The results indicate that direct injection of hydrogen prevents backfire, and that high thermal efficiency and output power can be achieved by hydrogen injection during late compression stroke. Moreover, by further optimization of the injection timing for each engine load, NO x emission can be reduced under the high engine output conditions.