fuel injection pressure control

... 2 Basic Control Method for Injection Timing In order to change the injection timing, the amount of fuel pressure added to the timer piston of the injection pump is controlled, and the ... Timing Control Valve Timer Piston High Pressure Chamber ON Duty Ratio: Maximum Retard ON Duty Ratio: Minimum Advance Coil Low Pressure Side Coil Fuel Valve Fuel Valve Low Pressure Side High Pressure ... varies the timing of the start of injection The control of injection timing when the timing control valve is ON is explained below The control when the timing control valve is switched between...

Ngày tải lên: 23/10/2012, 09:09

... Counter Electromotive Force End of Injection Current Control 11 SERVICE TECH Vol.468 03-10 Current Control Calculation of the Injection Volume 3-1 Calculating the Injection Volume Based on the engine ... Smallest Injection Volume Correction Decides Final Injection Volume Solenoid Spill Valve Maximum Injection Volume Engine Speed Coolant Temperature Sensor Intake Air Pressure Sensor Fuel Temperature ... Valves The solenoid spill valve is directly linked to fuel injection volume control, so the responsiveness of the valve strongly influences the injection volume If the coil resistance is lowered...

Ngày tải lên: 23/10/2012, 09:09

... cycle ( Q ), which is calculated from pressure data, and lower heating value of the fuel supplied ( Q fuel ) Q Q fuel Q Q fuel Q Q fuel = (Q B − Q C ) / Q fuel = (Q B − Q C ) × η u / Q B (9) = ... peak pressure reduction Compared to port injection, manifold injection gives lesser peak pressure With 20 % EGR at 50 % load, port injection shows higher peak pressure of % compared to manifold injection ... performance of dual injection hydrogen fueled engine by using in-cylinder injection and external fuel injection techniques An increase in thermal efficiency by about 22 % was noted for dual injection at...

Ngày tải lên: 05/09/2013, 15:28

... 220 230 240 250 Injection pressure (bar) Figure Variation of NOX with injection pressure at different injection timings The variation of smoke with injection pressures at different injection timings ... 200 210 220 230 240 250 Injection pressure (bar) Brake thermal efficiency (%) Figure Variation of brake specific fuel consumption with injection pressure at different injection timings 23 (°CA ... variation of oxides of nitrogen with injection pressure at different injection timings is shown in Figure The effect of injection pressure on NOX at different injection timings was investigated...

Ngày tải lên: 05/09/2013, 16:11

Ngày tải lên: 08/01/2014, 01:45

... the fuel pump and the fuel rail A fuel pressure regulator, mounted on the return end of the fuel rail and connected by a pipe to the inlet manifold to sense manifold pressure, controls fuel pressure ... Disconnect the fuel return hose from the regulator Be prepared for fuel spillage and Electronic fuel injection system 4D•3 Disconnect the fuel supply hose from the fuel rail, and disconnect the fuel return ... Electronic fuel injection system General information and precautions General information From the 1990 model year, an Electronic Fuel Injection (EFI) system controlled by the Electronic Engine Control...

Ngày tải lên: 25/01/2014, 02:20

Ngày tải lên: 26/05/2014, 15:16

... spring pressure and some fuel is bypassed into the fuel tank Fuel pressure is non-adjustable High Temperature (Pressure Up) Fuel Pressure Control Some engines are equipped with a high temperature fuel ... heated fuel is returned to the fuel tank On the return fuel delivery system, fuel heated by the engine returns to the fuel tank and has warmer fuel creating more fuel vapors Fuel Pump The fuel ... restricting fuel flow to the fuel tank This increases pressure in the fuel rail Atmospheric Modulated Pressure Regulator The atmospheric modulated pressure regulator modifies fuel pressure with...

Ngày tải lên: 28/05/2014, 14:24

... basically depends on the following parameters: -Injection pressure increasing P: Increasing the injection pressure in relation to the control volume where the fuel is injected (P), increases the velocity ... annular gap just a few microns wide The peak fuel pressure in this system is up to 200 bar - around 50 times the fuel pressure in a conventional petrol injection system (Website 4, 2010) The firms ... between the spray of fuel and the combustion chamber wall, hence 20 Fuel Injection the importance of measuring the liquid phase penetration of the fuel in Diesel engines with direct injection, using...

Ngày tải lên: 20/06/2014, 11:20

... phenomena: thermodynamic variables (pressure, temperature and density) present in the combustion chamber at the moment when the fuel is injected, the injection pressure and the geometry of the nozzle ... in diameter, and the injection pressure was 300, 700, 1100 and 1300 bar Table shows the estimated mass flow rates and discharge coefficients for each nozzle and injection pressure A diagnostic ... ρB Piny C d n a (39) G H LL max µ dE ρF Piny Cd n a (40) 5.4 Determination of the fuel injection onset The fuel injection onset can be determined assuming that LL increases proportionally to the...

Ngày tải lên: 20/06/2014, 11:20

... speed of injection pump camshaft Static opening pressure of injector Background pressure Maximum fuel injection pressure Average fuel injection pressure Kinematic viscosity of fuel Diesel Fuel Rape ... Liquid fuel in cylinder of injector nozzle holes Fig Liquid fuel in cylinder of injector nozzle holes 90 Fuel Injection Fig Fig 11 Liquid fuel in cylinder of injector nozzle holes Liquid fuel in ... determining fuel distribution in a spray of drops (top view) s 78 Fuel Injection The height of fuel in the measuring vessels was adopted (denoted by Hp) as a comparative measure to ascertain the fuel...

Ngày tải lên: 20/06/2014, 11:20

... 94 Fuel Injection Fuel- air mixing increases as the fuel nozzle holes orifice diameter fuel nozzle holes decreases Also soot incandescence is observed to decrease as the amount of fuel- air ... the control piston), is then returned to 98 Fuel Injection Fig Injection equivalent hydraulic circuit tank after passing through a small opening, modelled with the resistance R T , between control ... injector for common rail systems Control valve pin Pin guide and upper stop Control valve anchor 97 C-shaped connecting pin and anchor Control volume feeding (Z) hole Control volume discharge (A)...

Ngày tải lên: 20/06/2014, 11:20

... two-stage split and early fuel injection, J of Engineering for Gas Turbines and Power 124: 660–667 120 Fuel Injection The investigation of the mixture formation upon fuel injection into high-temperature ... behavior from multiple injections common rail systems, SAE paper 2002-01-2777 118 Fuel Injection Canakci, M & Reitz, R D (2004) Effect of optimization criteria on direct -injection homogeneous ... temperature T0 It was 122 Fuel Injection assumed that the stalling air flow at the inlet had a developed turbulent profile and that the spraying air had a uniform profile Injection of a fuel with a temperature...

Ngày tải lên: 20/06/2014, 11:20

... upon fuel injection into isothermal swirling flows (spraying by pneumatic atomizer); T0 = T1 = 900 K; - a) -1 = 0 = 30, b) 1 = 0 = 60 The investigation of the mixture formation upon fuel injection ... 142 Fuel Injection Notation Cf, volumetric concentration of a liquid fuel, kg m3; cf, coefficient of specific heat of liquid, J (kg�K); cpg, coefficient of specific heat of gas at constant pressure, ... determined by a direct in-cylinder pressure acquisition during a fuel switch-off operation The third term (resonance pressure) is indeed related to high-frequency pressure fluctuations, induced by...

Ngày tải lên: 20/06/2014, 11:20

... Optimization”, Sae Paper 2001-01-1509 Hydrogen fuelled scramjet combustor - the impact of fuel injection 167 X Hydrogen fuelled scramjet combustor - the impact of fuel injection 1College Wei Huang12, Zhen-guo ... (solutions #428 and #115, respectively) 164 Fuel Injection Figure 23 compares the related optimal injection strategies, while figure 24 finally shows the pressure cycles, the heat release rates, ... validate the correctness of the injection phenomenon in the scramjet combustor 170 Fuel Injection The experimental test investigates the phenomenon of the traverse injection of helium into parallel...

Ngày tải lên: 20/06/2014, 11:20

... the higher static pressure because of the more intense combustion  The fuel injection varies the dimension of the eddy generated in the nearby cavity flameholder Due to the fuel injection, the ... hydrocarbon fuels, which is sprayed from the fuel injector in Fig 3(a) The fuel injector, which is a typical fuel nozzle used in home-boilers, is equipped with the stainless steel tube and provides fuel ... point away cm from the fuel injector in Fig Therefore, the burner flame temperature near a region of fuel injection may be as high as that of CH4/air flame in 192 Fuel Injection adiabatic condition...

Ngày tải lên: 20/06/2014, 11:20

... middle containers have been used for the solution injection The data acquisition system records pressure, differential pressure, temperature, gas/water injection rate and production rate The vessel ... distribution control is the results of a compromise among different requirements (Steiler, 1998): To achieve a control gas flow in order to maintain the shaft permeability in spite of higher levels of injection ... has reached a high standard to control the process in its inner part Special importance has the optimisation and control of composition and gas distribution and the pressure losses inside the furnace...

Ngày tải lên: 20/06/2014, 11:20

... Experimental conditions during Hydrate dissociation by EG injection 3.901 3.825 244 Fuel Injection 6.0 20 5.5 18 Pressure Temperature Section II 16 Pressure( MPa) 5.0 14 Section III 12 4.5 10 Section ... interfacial area (Sira et al., 1990) In this work, the pressure, temperature and the EG injection rate maintain 246 Fuel Injection constant after the EG injection The instantaneous gas production rates ... gas produced after EG injection is also given in Table The rate of hydrate dissociation by EG injection is a function of EG concentration, injection rate of EG solution, pressure, temperature...

Ngày tải lên: 20/06/2014, 11:20

... High -pressure pump High -pressure accumulator(rail) Pressure- control valve Rail -pressure sensor Injectors ECU with sensors COMMON RAIL FUEL INJECTION SYSTEM COMMON RAIL FUEL INJECTION SYSTEM SUMMAR ... transporting the fuel to the high pressure circuit The Common Rail Sub functions High pressure circuit comprises: High – pressure pump with pressure – control valve The high – pressure accumulator ... injected fuel quantity, start of injection, duration of injection, and rate of discharge curve, as well supervises the correct functioning of the injection system as a whole COMMON RAIL FUEL INJECTION...

Ngày tải lên: 20/06/2014, 17:41

... engines, fuel supply system consists of the fuel tank, low -pressure pump, fuel filter, high -pressure pump, fuel rail, high -pressure sensor, injector and fuel pressure control valve (Figure 7) The fuel ... engine require high fuel pressure levels Fuel injection pressure is between to 13 MPa (the actual trend is to increase the level of pressure) This pressure is higher than PFI engine pressure values ... closed loop pressure- control valve In a closed loop control excessive fuel is returned by means of the pressure control valve This valve allows just enough fuel to return to the tank The fuel rail...

Ngày tải lên: 21/06/2014, 01:20