Pressure-amplified common rail system for commercial vehicles

Leonhard, Rolf; Parche, Marcus; Alvarez-Avila, Carlos; Krauß, Jost; Rosenau, Bernd

doi:10.1007/bf03226948

Cited by 14 publications

(4 citation statements)

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“…Control of several valves mounted in the CRI [4] is aimed either at increase, either at decrease of pressure in the course of fuel injection in relation to pressure in the CR.…”

Section: --------------mentioning

confidence: 99%

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A control method of fuel distribution by combustion chamber zones and its dependence on injection conditions

et al. 2018

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A method of fuel injection rate shaping of the Diesel engine common rail fuel system with common rail injectors and solenoid control is proposed. The method envisages the impact on control current of impulses applied to the control solenoid valve of the common rail injectors for variation of the injection rate shape. At that, the fuel is supplied via two groups of injection holes. The entering edges of the first group with the coefficient of flow, μ сB , were located in the sack volume and the entering edges of the second group (coefficient of flow, μ сH)on the locking taper surface of the nozzle body. The coefficients of flow, μ сB , and μ сH differ considerably and depend on the valve needle position. This enables to adjust the injection quantity by injection holes taking into account operating conditions of the Diesel engine and henceby the combustion chamber zones. Using the constant fuel flow setup , characteristic of the effective cross-section of the common rail fuel system injector holes was investigated. The diameter of injector holes was 0.12 … 0.135 mm. The excessive pressure at the entering edges varied from 30 to 150 MPa and more and the excessive pressure in the volume behind the output edgefrom 0 to 16 MPa.

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“…Control of several valves mounted in the CRI [4] is aimed either at increase, either at decrease of pressure in the course of fuel injection in relation to pressure in the CR.…”

Section: --------------mentioning

confidence: 99%

“…The basic tendencies of development of CR fuel systemsthe increase of injection pressure [1][2][3], ensuring multiple injection with the desired shape of the front edge of the basic injection rate [4][5][6], and organization of fuel distribution in the combustion chamber [7].…”

Section: Introductionmentioning

confidence: 99%

A control method of fuel distribution by combustion chamber zones and its dependence on injection conditions

et al. 2018

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“…Different injector driving system concepts, such as solenoid, [12][13][14] indirect-acting piezoelectric or direct-acting piezoelectric systems, 15,16 have been analysed in depth to determine the advantages and critical Department of Energy, Politecnico di Torino, Torino, Italy issues of each technology. Innovative injector hydraulic layouts, such as pressure-balanced pilot valves, [17][18][19] three-way pilot valves, 20 pressure-amplified injectors 21 or bypass ducts that connect the delivery to the control chamber of the injector, have been applied to improve the dynamic performance, to reduce power losses and to increase the maximum pressure. Furthermore, attention has also been paid to the design and experimental analysis of high-pressure pumps 22,23 and to the effect of the piping system dimensions on multiple injections.…”

Section: Introductionmentioning

confidence: 99%

Fully predictive Common Rail fuel injection apparatus model and its application to global system dynamics analyses

Ferrari

Pizzo

2016

International Journal of Engine Research

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A fully predictive model of a Common Rail fuel injection apparatus, which includes a detailed simulation of rail, pump, piping system, injectors and rail pressure control system, is presented and discussed. The high-pressure pump and injector sub-models have been validated separately and then coupled to the rail and pressure control system sub-models. The complete predictive model has been validated and applied to investigate the effects of the dynamics of each component of the injection apparatus on the rail pressure time history. Variable timing of the high-pressure pump delivery phases has also been considered, and the influence of this parameter on the injection performance has been analysed for both single-and multiple-injection events. Furthermore, the injection system dynamics during the transients between steady-state working conditions has been investigated in order to highlight the role played by the dynamic response of the pressure control system on the rail pressure time history.

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“…Фирмой Bosch разработана система APCRS [1,4,5]. Данная ТПС представляет собой систему типа Common Rail, которая дополнена форсункой со встроенной плунжерной парой (насос), приводимой в Рис.…”

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Fuel feed system with injection pressure control for diesel engines

Погуляев¹,

Байтимеров²,

Наумов³

et al. 2013

EJSI

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Предложена топливоподающая система для дизельного двигателя, позволяющая управлять давлениями предварительного впрыскивания и впрыскивания после основного, а также изменять кривую давления основного впрыскивания. Система представляет собой насос-форсунку с независимым управлением давлением и иглой. Разработана математическая модель впрыскивания топлива насосом-форсункой. На основе этой модели рассчитаны характеристики топливоподачи для многофазного впрыскивания, состоящего из одного предварительного, основного и одного впрыскивания после основного. Расчет проводился для режимов, различающихся формой основного впрыскивания: ступенчатая, трапециевидная, треугольная и прямоугольная. Показано, что предложенная топливоподающая система позволяет реализовать все четыре формы основного впрыскивания, а также установить давление предварительного впрыскивания и впрыскивания после основного. Рассматриваемая топливоподающая система является перспективной, однако нуждается в дальнейшем изучении.

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Pressure-amplified common rail system for commercial vehicles

Cited by 14 publications

References 0 publications

A control method of fuel distribution by combustion chamber zones and its dependence on injection conditions

A control method of fuel distribution by combustion chamber zones and its dependence on injection conditions

Fully predictive Common Rail fuel injection apparatus model and its application to global system dynamics analyses

Fuel feed system with injection pressure control for diesel engines

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