What is injector pulse width

I want to know PW from idle to high rpm. Thanks for any clarification. Moved this to Diag Tools. Not sure if such a chart is out there It's my experience that injector pulse width is more closely related to engine load than engine speed. I can experiment with this on the Scion later. The following user s said Thank You: karim. Played with this a bit earlier:. MacFadyen Replied by Andy. Yes engine load which basically depends on how much air is trapped in each cylinder at the start of the compression stroke.

Multiply the result by percent. This yields the pulse width of the duty cycle. Min pulse width check is to ensure that pulse width of clock signal is more than required value.

Basically it is based on frequency of operation and Technology. Set the digital multimeter DMM to measure frequency. The steps can vary by meter. Duty cycle: A duty cycle is the fraction of one period when a system or signal is active. Frequency: The rate at which something repeats or occurs over a particular period.

Rise time is the time taken for a signal to cross a specified lower voltage threshold followed by a specified upper voltage threshold. This is an important parameter in both digital and analog systems.

In digital systems it describes how long a signal spends in the intermediate state between two valid logic levels. For applications in control theory, according to Levine , p. For a signal in the time domain, an important figure of merit is its rise time.

This is typically the or This method takes about 30 minutes per signal. Note the much higher mobility of electrons vs. The rise time at the output depends primarily on how fast the P channel device can turn on, and the fall time is determined primarily by how fast the N channel device can turn on. Conversely, fall time is the measurement of the time it takes for the pulse to move from the highest value to the lowest value. You can observe problems with the fuel injector in a variety of ways.

A fuel smell coming from the engine compartment, for example, might mean that the fuel injector is creating a pulse width that is too long.

A misfiring of the engine or a decrease in power, acceleration , or speed might be symptoms of a failing fuel injector. In any case, your vehicle has a built-in safety message to prevent a related spontaneous breakdown: the "check engine" light. If your check engine light comes on, you should see a mechanic or check the engine yourself by looking up the OBD-II code that your vehicle's ECM outputs.

If you see a code that references fuel injector failure, the only solution might be replacing your fuel injector. In any case, it is best to visit a mechanic for a full diagnosis and the most professional solution to your engine troubles.

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