Dear customer,
Thank you for choosing the advanced Prins VSI System for your car! This system complies with strict European standards covering safety and the environment.
It is important that you read and understand this manual.
This digital manual gives you general information about Autogas (LPG), and explains the Prins VSI system. Scroll down further for information about the fuel selector switch, refuelling LPG, fuel consumption, safety aspects, maintenance, troubleshooting, general directives and the warranty terms.
General information for driving on LPG (Autogas)
1. As the VSI system starts on petrol, make sure that the fuel tank is not empty or nearly empty. This also prevents the fuel pump from running dry, which could lead to damage to the pump. The petrol in the tank should not be more than 3 months old.
2. For a guaranteed life span and optimal driveability of the VSI system it is necessary to follow the prescribed maintenance. We advise a maintenance check for the VSI system at an official Prins installer every 25.000 km or every two years. Check below to find the items for maintenance check.
3. When you smell gas in or around your car, immediately switch over to petrol and have your car checked at the nearest Prins LPG service point.
4. After the installation of your Prins system, you will receive a warranty certificate from your installer. This warranty certificate contains all information about your car and your Prins system. The warranty period starts on the day of conversion.
5. It is generally allowed for LPG vehicles to drive and park in an underground parking space. In some parking spaces there are restrictions imposed by the owner. The owner of the parking space may do that by placing signs at the entrance. These signs have to be respected.
AUTOGAS
Autogas or LPG (Liquefied Petroleum Gas) is in most countries a combination of propane gas and butane gas. LPG is produced during the extracting and refining of oil (petroleum) and natural gas. In its natural state it is gaseous but it is stored, under pressure, as a liquid in the LPG tank. LPG is a cleaner fuel than for example petrol or diesel. The use of LPG helps to improve air quality. It is an odourless gas, but to make it easier to identify for example a leak, an odour has been added to it.
The Prins VSI LPG system
VSI is short for Vapour Sequential Injection. The VSI LPG system is based on the sequential injection of vaporous LPG into the engine. ‘Sequential’ means that the LPG injectors apply the LPG in a specific order or sequence which equals the injection sequence of petrol injectors. The system also allows a more precise injection of the mixture, thus complying with the tightened emission regulations. The VSI LPG system is equivalent to the original petrol injection technology and makes optimum use of the electronics already present in your vehicle. With the Prins VSI LPG system you will experience no difference between driving using LPG or petrol.
No noticeable difference compared to running your vehicle on petrol!
The components that make up our VSI LPG-system are shown below. The main components meet the same standards as OEM-parts, and have been specifically developed for LPG and CNG systems. They satisfy the most demanding regulations and certification standards.
*This system lay-out is for 'VSI-3 DI' . It may deviate from your actual LPG system and is for reference only.
1. LPG tank
Liquefied petroleum gas tank
The LPG tank takes most often the place of the spare wheel, in the boot or under the vehicle. The LPG is stored under pressure in the storage tank. The tank is equipped with various safety appendages.
Filler
The filling point is mounted on the outside of the car or beside the fuel-filling under the fuel filler flap and is provided with a removable protective cover. This must be removed prior to refuelling. A non-return valve prevents the LPG from flowing back after refuelling.
LPG solenoid valves
There is one solenoid on the tank. When switching back to petrol mode, switching off the ignition or in case of an error the flow of LPG will be cut off.
Tank sender
The tank sender is mounted in the LPG tank. The tank sender is an electrical device which measures the fluid level in the tank.
2. AFC-3.0 DI computer
The AFC-3.0 DI computer is located in the engine compartment. The computer is the centre of the LPG installation that processes all incoming signals and drives the different actuators.
3. Fuel selector switch
The fuel selector switch is located on the dashboard or on the centre console. With the switch you operate the VSI system.
4. eVP-500 Reducer/regulator
eVP-500 reducer/regulator
The electronic controlled eVP-500 reducer is mounted in the engine compartment. The eVP-500 transforms the LPG from a liquid state into a vapour state, and will reduce the tank pressure to a variable system working pressure.
Temperature sensor
The temperature sensor is fitted into the reducer and measures the coolant temperature in the reducer. The temperature sensor sets the switch over moment of the system.
Actuator + filter
This part has three different functions. 1) It electronically controls the dynamic pressure of the LPG. 2) It cuts off the flow of LPG automatically when switching to petrol mode, switching off the ignition, or in case of an error. 3) In the same time it filters the LPG.
5. Filter unit
Filter unit
The filter unit is fitted between the reducer and the injector rail. The filter unit is filtering the pollution from the dry gas to protect the injectors.
Pressure / temperature sensor
The filter unit is equipped with a pressure/temperature sensor. The sensor measures the pressure and the temperature of the gas.
6. Injector rail
Injector rail
The injector rail is fitted close to the inlet manifold. The injector rail consists of injectors which are metering the supply of vapourized LPG sequential into the engine.
Fuses
The fuses are located in an available place in the engine compartment. The fuses protect the electronic circuit from overloading.
