Engine Performance Maps
Engine Performance Maps
(OP)
Given the maximum power and torque ratings of a diesel engine, would it be possible to generate the throttle/Accelerator pedal map vs Torque at various RPMs? How can I construct this, or is it determined through tests?
Thank you!
Thank you!





RE: Engine Performance Maps
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Engine Performance Maps
It gets a little bit more complicated than that even ... Oftentimes the (electronic) accelerator pedal provides a PWM signal to the engine, where having no pressure on the pedal gives a relatively low % duty cycle output, and having maximum pedal displacement gives a relatively high duty cycle output. Typically the lowest engine speed corresponds to about 20% duty cycle from the pedal, and the highest engine speed corresponds to about 80% duty cycle. In some implementations, calibration of the accelerator pedal is done automatically by the engine, such that initially the engine expects to see 25% duty cycle corresponding to low idle and 75% duty cycle corresponding to high idle, and it will re-map those duty cycle figures based on the pedal inputs it sees in practice over its operating life (typically expanding the range of operation when the duty cycle goes out of the previously established "hi" and "low" points). In these implementations there is no direct correlation between the pedal duty cycle value and a desired RPM. For example, it is not possible to input a 50% duty cycle value and expect the engine to operate at 1,800 rpm.
RE: Engine Performance Maps
RE: Engine Performance Maps
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