Injector - Fuel Injection Timing

Check actual fuel-injection advance vs design - the indicator-diagram sanity check for 2-stroke or 4-stroke engines.

EngineTimingInjector

Designed advance BTDC°Measured advance°

Δ timing: 1.50°

Status: Early - reduce pre-stroke / VIT

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\Delta\theta = \theta_{meas} - \theta_{design}

Symbol	Meaning	Unit
$\theta$	Fuel injection advance before TDC	°

Source: MAN ES Operation Manual

In short

Check actual fuel-injection advance vs design - the indicator-diagram sanity check for 2-stroke or 4-stroke engines.

Learn the theory Engine Performance Monitoring: PMI Systems