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General| Fuel System | Direct Injection |
|---|---|
| Fuel Type | Diesel |
| Bore | 79.5 mm |
| Stroke | 95.5 mm |
| Aspiration | Turbocharged |
| Displacement | 1.9 L / 1896 cm3 |
| Power Output | 90-150 hp (67-112 kW) |
| Engine Code | ALH, etc. |
| Injection | Direct Injection |
| Valvetrain | SOHC |
Evolution of the 1.9-liter TDI engine and comparison with previous versions.
Key technical data for the 1.9-liter TDI engine including bore, stroke, and power output.
Design features of the piston and connecting rod for higher combustion pressures.
Adaptations to the toothed belt drive to handle increased injection forces.
General layout and function of the fuel supply system from tank to pump/injectors.
Detailed explanation of the tandem pump's design and fuel delivery mechanism.
How the distributor pipe ensures uniform fuel distribution to all injectors.
Description of the circuit and components used to cool the fuel.
Concept of combined pump and injector units for each cylinder.
Detailed breakdown of the pump/injector unit's internal parts and their functions.
How the camshaft drives the pump/injectors via roller-type rocker arms.
Explanation of pre-injection, main injection, and end of injection phases.
Introduction to the Engine Control Module (EDC 16) and its primary functions.
Overview of critical sensors and their role in engine control.
Explanation of primary actuators regulated by the engine management system.
Details on pump/injector solenoid valve operation, control, and monitoring.
List of components and their connections within the EDC 16 system.
Overview of additional input signals and CAN data bus communication.
Visual representation of electrical connections and signal flow in the EDC 16 system.
Available diagnostic functions using the Vehicle Diagnosis tool.
Steps for adjusting the minimum clearance of the pump/injector.
List and description of specialized tools required for service tasks.
Details on how to access and complete the online knowledge assessment.
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