HCCI-Combustion in the Z Engine

Janhunen, Timo

doi:10.4271/2012-01-1132

Cited by 6 publications

(3 citation statements)

References 69 publications

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“…Enhancing swirl has been shown to decrease ignition delay and combustion duration but typically incurs higher pumping losses in Diesel ICE [38]. In the Aumet Z engine, another SCE variant, novel valves were utilised to generate air flow conditions with high swirl ratios , high velocities (>100 ms −1 ) and low NO x emissions reported [39,40]. This suggests similar inlet air driven mixing could be occurring in the SCCRE.…”

Section: Underlying Principles and Hypotheses For The Air Fuel Mixing Mechanismmentioning

confidence: 99%

Starting to Unpick the Unique Air–Fuel Mixing Dynamics in the Recuperated Split Cycle Engine

et al. 2021

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In this work air fuel mixing and combustion dynamics in the recuperated split cycle engine (RSCE) are investigated through new theoretical analysis and complementary optical experiments of the flow field. First, a brief introduction to the basic working principles of the RSCE cycle will be presented, followed by recent test bed results relevant to pressure traces and soot emissions. These results prompted fundamental questioning of the air-fuel mixing and combustion dynamics taking place. Hypotheses of the mixing process are then presented, with differences to that of a conventional Diesel engine highlighted. Moreover, the links of the reduced emissions, air transfer processes and enhanced atomisation are explored. Initial experimental results and Schlieren images of the air flow through the poppet valves in a flow rig are reported. The Schlieren images display shockwave and Mach disk phenomena. Demonstrating supersonic air flow in the chamber is consistent with complementary CFD work. The results from the initial experiment alone are inconclusive to suggest which of the three suggested mixing mechanism hypotheses are dominating the air–fuel dynamics in the RSCE. However, one major conclusion of this work is the proof for the presence of shockwave phenomena which are atypical of conventional engines.

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Section: Underlying Principles and Hypotheses For The Air Fuel Mixing Mechanismmentioning

confidence: 99%

Starting to Unpick the Unique Air–Fuel Mixing Dynamics in the Recuperated Split Cycle Engine

et al. 2021

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“…The fuel evaporation energy Pevap [W] is deduced from the fuel consumption and the latent heat of evaporation Hevap [J/kg] and is equal to [54]:…”

Section: Energy Balancementioning

confidence: 99%

An Assessment of Low-Cost Tractor Motorization with Main Farming Implements

Zahidi¹,

Moufid²,

Benhadou³

et al. 2020

WEVJ

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The objective of the present work is to evaluate the performance of a low-cost tractor equipped with a parallel hybrid engine, which was simulated using AMESim software. The tractor was evaluated with three different farming implements attached to the tractor, and each implement requires a different type of power. The first simulation was executed without any implements attached. The tractor was able to run for 170 s with the electric motor only, which resulted in fuel savings during this period. The first implement, a moldboard plow, was attached for the second round of evaluation, and the electric motor ran by itself for 150 s, which also led to fuel savings during operation. During the third simulation, the tractor was attached to a Bette Harvest, which has a very high-power demand. The obtained results show that both engines were engaged to provide the required energy. During the final round of evaluation, simulations were run for a straw tub grinder. In this simulation, the electric motor ran alone until the battery was fully discharged. Thereafter, the combustion engine was activated in order to facilitate operations and to charge the battery. The results show that the parallel hybrid architecture employed for the low-cost tractor significantly decreased the CO2 emissions and minimized the consumption of fuel.

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“…Power, mean effective pressure etc. [9,10,11,12]. It is obvious, that decrease of displacement not provides desired results without any technological support like TwinTurbo, Variable Valve Timing, Variable Compression Ratio as well as applying fuels with designed parameters.…”

Section: Introductionmentioning

confidence: 99%

The Project of Automation of Synthesis of Fatty Acid Methyl Ester as an Additive for Diesel Fuel

Sroka

Kułażyński

Kawaliło

2012

AMR

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As petroleum fuels are getting higher in price day after day. I is important to search for an alternative fuel as crude oil will not last forever specially in this high economical and industrial progress. In a parallel way engineers and scientists are searching for additives for the current known fuel until they find the best alternative fuel which has to fulfill the pollution and technical requirements. One of the solution is to implement the idea of downsizing engine fuelled with alternative biodiesel - in this case manufactured by the transestrification by using microwave heating. The process needs automation to keep control for manufacturing efficiency and quality of fuel properties. Authors show the automation layout and present equipment of test stand. There is short summary of combustion engine emission tests, too.

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HCCI-Combustion in the Z Engine

Cited by 6 publications

References 69 publications

Starting to Unpick the Unique Air–Fuel Mixing Dynamics in the Recuperated Split Cycle Engine

Starting to Unpick the Unique Air–Fuel Mixing Dynamics in the Recuperated Split Cycle Engine

An Assessment of Low-Cost Tractor Motorization with Main Farming Implements

The Project of Automation of Synthesis of Fatty Acid Methyl Ester as an Additive for Diesel Fuel

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