Fuel injection control is one of the core elements of petrol ECU calibration, directly determining air-fuel ratio (AFR), combustion efficiency, engine torque, emissions, and thermal safety. In modern petrol engines, injection is precisely calculated based on air mass, load request, torque demand, and operating conditions.

Injection System and Injection Maps in WinOLS for Petrol ECU Tuning

In this episode, you will learn how petrol injection control works and how to locate, interpret, and tune injection-related maps inside WinOLS. From AFR and lambda fundamentals to injector pulse calibration and fuel corrections, this training provides a complete professional workflow for petrol fuel tuning in WinOLS.

AFR and Lambda Fundamentals in Petrol Engines

Before modifying any injection map, it is essential to understand AFR (air-fuel ratio) and lambda. AFR defines the proportion of air to fuel during combustion, while lambda expresses the mixture relative to stoichiometric conditions.

The course explains:

• Relationship between AFR and lambda
• Stoichiometric combustion (λ = 1)
• Rich vs lean mixtures
• Effects on torque, power, and fuel consumption
• Thermal and knock implications
• Conversion between AFR and lambda values

Understanding these concepts is critical because all petrol injection maps ultimately target a desired lambda value.

Finding Injection Maps in WinOLS

A key skill taught in this episode is identifying injection tables in raw ECU binaries using WinOLS. You will learn how to:

• Recognize lambda and fuel maps by value patterns
• Identify injection pulse and fuel mass tables
• Detect RPM vs load axis structures
• Distinguish fuel maps from air or torque maps
• Convert raw fuel values to real AFR or lambda

This enables accurate fuel calibration even without damos or predefined map packs.

Lambda Request Map in WinOLS

Defines the target air-fuel ratio under different operating conditions.

Axis: RPM vs load / torque request
Unit: Lambda or AFR

Controls mixture richness for power, economy, or emissions.

Tuning effect:
Richer mixture increases power and cooling but raises fuel consumption.

Lambda for Component Protection

Used to protect engine components at high temperature or load.

Axis: RPM vs load / exhaust temp model
Unit: Lambda

Enriches mixture to reduce combustion and exhaust temperature.

Tuning effect:
Ensures turbo, valves, and pistons remain safe under stress.

Injection Base Map in WinOLS Software

Primary fuel quantity or injector pulse width table.

Axis: RPM vs load / air mass
Unit: mg/stroke or injection time

Determines baseline fuel delivery for combustion.

Tuning effect:
Directly influences torque output and AFR stability.

Injection Correction Maps

Compensation tables adjusting fuel for temperature, voltage, or transient conditions.

Axis: Variable (temp, pressure, RPM)
Unit: Fuel correction factor or percentage

Maintain accurate fueling in real conditions.

Tuning effect:
Improves drivability and mixture accuracy.

Full Load Enrichment Maps

Defines richer fueling at wide-open throttle.

Axis: RPM vs load
Unit: Lambda

Used for maximum power and knock safety.

Tuning effect:
Essential for performance tuning.

Understanding Axes and Unit Conversion in WinOLS

Injection maps are stored as raw binary data. This episode teaches:

• Converting raw values to lambda or AFR
• Scaling fuel mass units (mg/stroke)
• Identifying RPM and load axes
• Reading injection surfaces in 3D
• Detecting unrealistic fueling values

Correct conversion is mandatory for safe fuel tuning.

How to Tune Petrol Injection Maps Safely

The training demonstrates professional fueling strategy:

• Enrich mixture at high load safely
• Maintain stoichiometric cruise fueling
• Balance power vs fuel consumption
• Control exhaust temperature
• Avoid lean knock conditions

Fuel calibration is always aligned with air and ignition tuning.

Advantages and Risks of Injection Changes

Advantages of optimized fueling:

• Higher torque and power
• Better combustion stability
• Knock reduction
• Improved engine cooling

Risks of incorrect fueling:

• Lean combustion and knock
• Overheating
• High exhaust temperature
• Catalyst damage
• Excess fuel consumption

Understanding these limits is essential for petrol ECU remapping.

What You Will Master in This WinOLS Injection Episode

By the end of this lesson, you will be able to:

• Understand petrol AFR and lambda control
• Locate injection maps in WinOLS
• Convert fuel data to real units
• Interpret injection surfaces in 2D/3D
• Tune fueling safely for performance
• Balance power, economy, and safety

This episode is a core part of professional petrol ECU calibration.
Mastering injection maps in WinOLS allows you to control combustion precisely, optimize AFR, and deliver safe, efficient, and high-performance petrol engine tuning.