Engine Protection

Engine Protection

Engine Protection

The Engine Protection function provides settings that allow the engine to be placed in a safer state of tune, in up to 3 different severity levels, when an error or fault condition has been detected.  Each sensor has an option to set between no engine protection and from Level 1 to 3 of engine protection for each error or fault condition. Per cylinder shutdowns based on a maximum Exhaust Gas Temperature is also available for engine protection. Common uses are with low oil pressure, low fuel pressure, excessive temperatures on certain sensors, and lean AFR conditions. 


This node configures the settings for each severity level of engine protection.

Severity Level Settings

Enable - Enables or Disables each severity level. 

Enrichment - Available when there is no Target Lambda table, such as when the Fuel Tuning Method is set to Injection Time.  This allows for a percentage of fuel to be added as an overall fuel correction while the Engine Protection is active. Running in a richer state of tune can add a level of extra protection to the engine under certain circumstances. 

Target Lambda Enrichment - Available when the Target Lambda table is available, such as when the Fuel Tuning Method is set to Volumetric Efficiency or Mass Air Flow, or O2 Control is active.  This allows for an amount of Lambda/AFR to be deducted from the Target Lambda (richer) while the Engine Protection is active. Running in a richer state of tune can add a level of extra protection to the engine under certain circumstances.

Boost Correction - Available when the Boost Control function is enabled. This allows for a percentage correction in boost pressure to be set while the Engine Protection is active.

Retard - An amount of ignition timing to be reduced (retarded) while the Engine Protection is active. Running in a more retarded ignition state can add a level of extra protection to the engine under certain circumstances.

Rev Limit Type - Select the type of engine limiter to be used, either Fuel or Ignition Cut.

Rev Limit End - The RPM limit to be imposed while engine protection is active. A lower RPM limit can be set to protect an engine. The ECU will use the lowest limiter set throughout the system, whether it is the Main Limiter, Launch Control or the Engine Protection.

Active Condition - Selects the conditions that need to be met to resume normal engine operation.
Current and Past DTCs - Engine Protection will be active until the DTC has been erased by using the software. Normal engine operation will not resume until this has been completed. Typically used for more severe errors or faults.
Current DTCs only (Drive Cycle) - Engine Protection will be active until the ECU is powered off. Normal engine operation will resume on restart. Typically used for less severe errors or faults.

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