How do you calculate injector flow rate?

Calculate flow rate on pressure change

  1. The formula to find the new FUEL FLOW rate after a fuel pressure change:
  2. Example 1: A 240 CC injector tested at 43.5 PSI is run at 50 PSI.
  3. So, the resultant change in pressure would yield the following: 240 cc/Min X 1.0721 = 257 cc/Min. 22.86 Lb/Hr X 1.0721 = 24.51 Lb/Hr.

What is base pulse width?

Base pulse width is a function of engine speed (RPM) and load (which can be calculated from manifold absolute pressure). Let’s say the engine speed is 2,000 RPM and load is 4. We find the number at the intersection of 2,000 and 4, which is 8 milliseconds.

How do you size a fuel injector?

Fuel Injectors are sized by their flow rate. Flow rate is a measurement of how much fuel can be delivered over time. It is listed in pounds per hour (lbs./hr.) or cubic centimeters per minute (cc/min.). The right size injector can supply enough fuel under full load conditions at an 80% duty cycle.

What is flow rate for injectors?

Injector Flow Rates are expressed in pounds per hour (lb/hr) or cubic centimeter per minute (cc/min). Given the same pressure 1 lb/hr = 10.5 cc/min. Fuel injector static flow rate is the maximum fuel a fuel injector can flow at a given pressure. May 6th, 2013|Comments Off.

What is a good injector pulse width?

between 2.5 and 3.5 ms
Injector pulse width is the amount of time, measured in milliseconds (ms), that a fuel injector stays open (delivers fuel) during a cylinder intake cycle. The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms.

What controls the injector pulse?

The injector in a basic picture is an electronically controlled valve that is supplied with pressurized fuel from the fuel pump at a certain pressure level injector can be electromagnetically opened and closed at very high speed—this speed is controlled by the electronic control unit using.

What is pulse width equation?

Create a ratio that places the length of the cycle activity in the numerator and the length of the overall cycle in the denominator. Divide the numbers. Multiply the result by 100 percent. This yields the pulse width of the duty cycle.

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