Typical fuel system of 4x4 on road light duty diesel engine vehicles available in Malaysia with the capacity of the engine is 2.5 litre (2500 cc), 4 cylinders in-line, had common rail fuel injection system, valve mechanism 16-valve DOHC and generates a maximum power of 106 kW at 3400 rpm and 343 Nm maximum torque at 1600-2800 rpm

I think the issue here is not about the minimum and maximum flow rate (Theoretical). You should be thinking of which particuler blend should give you the lowest specific fuel consumption at the best brake thermal efficiency.

Flow rate depends upon engine CC

So let say the cc is 2500, how to calculate the flow rate? Mind to share the equation or calculation? Thank you in advanced

flow rate =velocity *area

Lets say you want to know the fluel consumption at maximum power point of the engine. Assumption: the engine has a typical efficiency of 33% at this point, so you need to supply 106kW/(engineEfficiency) = 106kW*3 of total power to the engine in form of fuel. The result for this simplified example is 318 kW. With this you can calculate your needed flow rate of fuel based on the energy density of diesel, which you want to have in kWh/l fuel. This is roughly 10kWh/l so you calculate: NeededPower=EnergyDensityFuel*Flowrate, so Flowrate=NeededPower/EnergyDensityFuel in l/h, = 31,8 l/h = 530ml/min, for the maximum power point. So you always have to look at the specific efficiency map to calculate the needed fuel flow rate. hope this helps

Hi,

You want to develop a dynamic test rig (close system) that imitate the real condition of the fuel diesel engine vehicle and only focus on the low pressure part (before injector)?

Firstly, you need to specify fuel injection system.

If you are referring to common rail type fuel injection system, the fuel is pressurized at the high pressure pump and stored in the rail waiting to be injected into the combustion chamber via the injector. Hence, the fuel pressure before the injector which you are particularly interested to study would be at high pressure.

Thanks

Hi,

Concerning the fuel flow rate from and to the tank (fuel recirculation), I have indeed measured it before using flow meter. It was part of my experimental work of investigating the fuel deterioration under diesel engine operation. Article Deterioration of palm biodiesel fuel under common rail diese...

I measured the fuel from the fuel tank into the fuel delivery system, as well as the fuel return from injector leak back, common rail, etc.

The fuel flow rate was influenced by several factors.

I am yet to publish the collected data.

Thanks