Lpi Vialle Technical Manual Top
Unlike traditional evaporator/venturi systems that use gaseous LPG, the LPi system injects liquid LPG . This prevents power loss and makes the system less sensitive to ambient temperatures.
The is more than a collection of wiring diagrams and torque specs; it is the collective knowledge of Vialle’s engineering team. Whether you are troubleshooting a pressure drop, replacing an injector seal, or performing a full system retrofit, keeping this manual printed in your workshop (or bookmarked on your tablet) will save you hours of guesswork and prevent costly mistakes.
Technical Guide: Understanding and Servicing the Vialle LPi System
Located near the LPG tank, this unit pressurizes the liquid gas. lpi vialle technical manual top
Optimal combustion with no discernible difference in acceleration compared to petrol.
Locate the service valve on the tank multivalve assembly and close it completely by turning it clockwise.
Because liquid propane has a different density, energy content, and stoichiometric ratio (AFR) compared to petrol, the LPE recalculates the duration of the injection pulse. It applies a correction factor to drive the LPG injectors accurately. Whether you are troubleshooting a pressure drop, replacing
The most crucial element is the pump. If the pump fails, the car will not run on LPG.
(for professional technicians) Rating: 4/10 (for the average hobbyist)
To safely diagnose a Vialle LPI system without swapping parts blindly, you must build a dedicated diagnostic setup capable of reading high-pressure metrics. Step 1: Evaluating System Pressures Locate the service valve on the tank multivalve
Avoid pirated or scanned versions from file-sharing sites. These often have missing pages, blurred schematics, and incorrect data that can lead to dangerous installations.
Maintains a constant differential pressure above the ambient tank pressure. This ensures that even under high engine bay temperatures, the LPG cannot boil or vaporize inside the rail.
Measure current draw of the pump motor. High current indicates mechanical binding.
: By injecting LPG in liquid form, the system achieves a phase-change cooling effect that helps prevent engine overheating and maintains power levels similar to petrol. Injection Strategy
