Thank you for choosing the advanced Prins DLM (Direct LiquiMax) LPG System for your car. This DLM LPG system complies with strict European standards covering safety and the environment.
It is important that you read and understand this manual before driving on LPG.
This digital manual gives you general information about Autogas (LPG), and explains the Prins DLM LPG 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. The Prins Direct LiquiMax system directly starts on LPG. When the LPG fuel tank is almost empty, the system automatically switches over to petrol. After you filled up the LPG tank for minimum 40% the system will automatically switch back to LPG mode.
2. For a guaranteed life span of the LPG Direct LiquiMax system and optimal driveability it is necessary to follow the prescribed maintenance/checks. We advise a maintenance check for the VSI system at an authorised Prins installer every 25.000 km or every two years. Find the items for maintenance check below.
3. When you smell gas in or around your car, immediately switch over to petrol and have your car checked at the nearest Prins authorized dealer or Prins 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 including warranty terms.
5. It generally is allowed for LPG vehicles to drive and park in an underground parking garage. In some garages there are restrictions imposed by the owner. The owner of the garage may do that by placing signs at the entrance. These signs have to be respected.
6. To prevent the petrol getting over aged it is necessary to drive occasionally on petrol. Prins advices to “almost” empty the petrol tank at least twice a year and refill the tank for at least 25%. If the petrol level is too low the petrol is ageing faster and there is a bigger risk that the petrol fuel pump is running dry and fails.
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 DLM LPG system
The Prins Direct LiquiMax system is developed for motor engines with direct injection of petrol. Direct injection means that the fuel will be injected under high pressure directly in the cylinder instead of before the inlet valves. This LPG system makes use of the original high pressure fuel pump and injectors that inject the fluid LPG under high pressure into the cylinder.
Direct Injection makes a more precise injection of the fuel possible and therefore a higher engine efficiency and up to 15% lower CO2 emissions and up to 98% less particles. The Prins injection system is equal to the original petrol high pressure technology and makes optimum use of the electronics that are already present in the car. With Prins Direct LiquiMax you will not experience a difference in driving on LPG compared to driving on petrol.
1. LPG tank
1. LPG tank with fuel module
The LPG tank takes most often the place of the spare wheel, in the boot or under the vehicle. The Liquid LPG is stored under pressure in the storage tank. The tank is equipped with various safety appendages and an electric pump, together also known as the Fuel module. The pump ensures that the liquid gas circulates and is transported to the high pressure pump on the engine. Unused fuel will be transported back to the tank again.
2. Tank lock off valve
The LPG lock off valve is mounted on top of the tank. It is an electric safety device controlled by the fuel controller (AFC). It shuts off the LPG flow making a switch to petrol in case of system error.
3. Filler
The filling point is mounted on the outside of the car or beside the petrol fuel-filling under the fuel filler flap and is provided with a removable protective cover. This cover must be removed prior to refuelling. A non-return valve in the filler prevents the LPG from flowing back after refuelling.
2. AFC (Alternative Fuel Controller / Computer)
The Prins AFC is located in the engine compartment. This AFC is the electrical control unit for the Prins Direct LiquiMax LPG system. The main functions of the AFC are:
• Safety control
• Diagnostic status
• Fuel delivery control
• Air-fuel-mixture formation
3. Fuel selector switch
The fuel switch is located on the dashboard or on the centre console. With the switch you operate the Prins Direct LiquiMax system. The fuel switch can be used for switching between both fuels, as well as monitoring system status, LPG tank level and diagnostic status.
4. Fuel Management Unit (FMU)
The FMU is located in the engine compartment and ensures that while driving on LPG a fuel return to the LPG tank is possible. Beside that it makes it possible to switch between gas and petrol. The FMU contains a replacement filter that needs to be replaced when system service is required.
5. The high pressure fuel pump (fuel pump)
The car's high pressure pump is used to inject the liquid LPG towards the petrol injectors.
6. Boost pump
The boost pump is placed in line with the petrol fuel line. The boost pump increases the petrol pressure during the switch over from LPG to petrol in order to make the switch possible.
