Relationship between LPG fuel and gasoline injection duration for gasoline direct injection engines

Mitukiewicz, G.; Dychto, R.; Leyko, J.

doi:10.1016/j.fuel.2015.03.033

Cited by 33 publications

(18 citation statements)

References 10 publications

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“…The injected LPG depends on the effective flow area-μA (mm 2 ), injection duration-t LPG (s), gas pressure-ΔP LPG (Pa) at intake manifold temperature-T 0 (K) and pressure-P 0 (Pa). In addition, LPG has c p of 1750 J/kg K and R LPG of 161.26 J/kmol K, therefore, the mass of the injected LPG is presented in the following equation [36].…”

Section: Vehicle Specificationmentioning

confidence: 99%

“…The results of this study confirm an increase in engine performance and better exhaust emissions compared to the carburetor system. Others study, including the fuel cut-off method to cut off LPG flow to the engine during deceleration by controlling the solenoid on the vaporizer [31,32], emission comparison using a control system on liquid phase injection (LPI) and direct injection (DI) [33], as well as the characteristics of injection duration and control [34][35][36]. This has led to the development of intelligent control systems to support fuel efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Design and application of air to fuel ratio controller for LPG fueled vehicles at typical down-way

et al. 2019

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This article presents an investigation of air-fuel ratio (AFR) controllers applied to liquefied petroleum gas (LPG) fuelled vehicles with second-generation LPG kits. When a vehicle is running on a down-way, fuel consumption tends to be rich because of the increased vacuum in the intake manifold. Therefore, an AFR controller was developed that can work based on a vehicle's tilt sensor combined with an oxygen sensor. AFR controllers are employed to regulate injectors to form leaner mixtures. We tested the performance of AFR controller at a typical down-way of 10°, 15°, and 20°. As a result, the AFR controller was able to increase AFR value from an average of 14.5 (without controller) to 15.5-16.2, depending on the gear position and down-way angle. Furthermore, a greater of road slope was observed to have produced greater AFR. This AFR controller is very promising to be applied to vehicles operating in mountainous areas.

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Section: Vehicle Specificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and application of air to fuel ratio controller for LPG fueled vehicles at typical down-way

et al. 2019

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“…Ho wever, due to the slow response of dynamometer, the engine brake torque will lag behind. According to the defin ition of engine brake power P Mn (1) where M is the brake torque and n is the rotational speed. When the brake power of LPG engine changes, the lag of brake torque will cause the fluctuations of engine speed.…”

Section: Analysis Of Actual Experimental Conditionsmentioning

confidence: 99%

“…LPG (Liquefied Petro leu m Gas) has been widely used as an alternative fuel fo r vehicle engine due to its good fuel properties and environmental protection [1]. Ho wever, with gradually stricter emission regulations, to further reduce the emissions of LPG engine is a v ital issue for its manufacturers.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of HC Emission Behavior from a Lean Burn LPG Engine during Transient Operating Conditions

Zhang

2017

MATEC Web Conf.

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Abstract. Based on engine bench test system, the HC emission behavior of a lean burn LPG engine during constant speed and changing (increasing an d de creasing) torque transient conditions was investigated. Results show that HC is significantly deteriorated under the experimental operating conditions. HC concentration value is higher than the steady-state value by 2.3% an d 14.2%, respectively. T he response of the actual torque lags behind the desired torque by 2.047s and 2.109s, respectively, and leads to the actual speed deviates from the desired value by 4.5% and 3.7%. T he deviation of the actual speed causes the fluctuations of IAA, which is the key reason for the deterioration of HC under increasing torque operation. The control of fuel valve cannot meet the demand of the actual LPG mass durin g the transient operating conditions, leads to the actual LPG mass value deviate from the target value by 4.7% and 8.8%, respectively. And this is also the main responsibility for the actual AFR deviate from the target value by 5.1% and 8.2%, respectively. During the decreasing torque operation, caused by the deviation of the actual AFR, the mixture is too rich, which results in the deterioration of HC.

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“…The revenue of LPG recovery is increased because it could be used for internal combustion engines as an alternative to conventional fuels. It is found that gasoline Multipoint Injection engine's fuel system could be adapted easily to LPG supply . Besides, LPG is widely used as rural heating and cooking fuel .…”

Section: Introductionmentioning

confidence: 99%

Liquefied petroleum gas recovery enhancement via retrofitting the refrigeration system of an existing natural gas liquid plant

Shehata

Bhran

Shoaib

et al. 2019

Asia-Pacific J Chem Eng

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Nowadays, gas processing for natural gas liquids (NGLs) recovery is becoming of great interest. However, many of the present NGLs recovery units in operation do not give the desired revenue. This study focuses on the retrofitting of an existing NGLs plant constructed in Egypt for maximizing LPG product recovery due to its high economic value. Various alternatives have been suggested to maximize LPG recovery, while achieving the same cooling target and ethane recovery in terms of power consumption and additional capital cost. The economic study shows that replacing the existing pure propane refrigerant used to recover C 5 + (pentane and heavier) in the existing plant by a mixed refrigerant type is the best retrofitting technique. Furthermore, the exergy of the whole NGL unit was studied to evaluate the exergetic performance of all suggested upgrading methods. Regarding the upgraded plant, the butanes and propane recoveries were increased by 13% and 7%, respectively, with 15.95% increase in LPG overall recovery. In addition, the solutions of operational problems that may appear in the glycol injection system, propane refrigeration facilities, and de-ethanizer unit facilities when switching from single refrigerant to mixed refrigerant have been taken into consideration.

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Relationship between LPG fuel and gasoline injection duration for gasoline direct injection engines

Cited by 33 publications

References 10 publications

Design and application of air to fuel ratio controller for LPG fueled vehicles at typical down-way

Design and application of air to fuel ratio controller for LPG fueled vehicles at typical down-way

Experimental Analysis of HC Emission Behavior from a Lean Burn LPG Engine during Transient Operating Conditions

Liquefied petroleum gas recovery enhancement via retrofitting the refrigeration system of an existing natural gas liquid plant

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