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Vapour Injection- VS2

Vapour Sequential Injection

VSI System

VSI is an abbreviation for “Vapour Sequential Injection”. The VSI system is the most advanced vapour injection system available on the market. With the VSI system there is no difference between driving on LPG or with petrol. With the VSI system, Prins strives for optimal emissions and cost reduction.

The VSI system is developed in close cooperation with Keihin Corp of Japan, one of the world’s leading injector manufacturers and a name that stands for OEM quality and reliability.

The VSI system is fully integrated by way of a “master – slave” method with the vehicle ECU, making it (E)OBD compatible, therefore oxygen sensor signal emulation is not required.

The key components of the system are all of OEM quality and specially designed for LPG applications. All components comply with the strictest regulations and certifications. The installation of the components is very easy due to the compact design of the components.

The dedicated diagnostic software is unique and enables fine tuning the VSI system for optimal performance and emission reductions.

  • VSI Regulator
    Compact and Powerful
  • Keihin Injectors
    Automotive OEM quality
    LPG injectors
  • VSI ECU
    High quality and reliable
  • European ECE R67-01 & Canadian CSA homologated
  • Compact design: Ø125x95mm
  • Solid design: tested to over 60 bar burst pressure
  • Black anodised aluminium
    Membranes & vulcanised seat & o-rings: tested in extreme conditions with temperatures from -30ºC to +120º C (other specs optional)
  • Over pressure is vented via 6mm hose to inlet manifold
  • Adjustable pressure: 1.7 – 2.6 Bar
  • System pressure control with single stage valve.
  • System pressure is independent to inlet pressure (MAP).
  • Optional MAP connection is available (for turbo charged engines).
  • Very stable dynamic pressure behaviour compared to other single stage reducers.
  • Flexible lock off valve both standard as BFC (big flow capacity as used in Australia) as well.
  • Integrated temperature sensor. (NTC resistor, R=2500 ohm at 20°C).

Injects LPG/CNG into the inlet manifold for each cylinder. Developed by Keihin Corp, Japan, one of the world’s leading injector manufacturers, in cooperation with Prins. Injectors are of OEM quality and reliability.

INJECTOR RAIL

  • European ECE R67-01 & R110 homologated.
  • PA6 glassfibre “re-inforced” nylon.
  • Only right inlet version available. If required the fitter can easily convert the right inlet version into a left inlet version.
  • High profile look.
  • Light weight and compact.
  • Uncomplicated fitting.
  • Assembled and leak tested at factory prior to dispatch.
  • 2, 3, 4 or 5 cylinder assemblies.

INJECTORS

  • OEM quality injector
  • Lifespan at least 290,000,000 cycles or 240,000 km -> 2 year unlimited warranty!
  • Excellent linear flow range (linear 2% accuracy form min to max flow). Linear flow starting from 2.5 msec.
  • Low-resistance of 1.25 Ohm.
  • 5 injector sizes for engine capacities from 9 kW till 45 kW each cylinder. (e.g. 3 cyl with 27 kW to 10 cyl. 450 kW).
The ECU controls the VSI system.
  • Approval for E-marking LPG R67-01 and CNG R110 regulations
  • 3 versions: 4, 8 and 10 cylinder
  • All upgrades are backwards compatible
  • High reliability
  • Measures the engine signals such as petrol-injector opening times, rpm, MAP, coolant temperature, etc.
  • Controls all the LPG solenoids
  • Controls the LPG injectors
  • Cuts off the petrol-injector operation
  • Provides a read out of the fuel choice
  • Communicates with the Technicians laptop installed diagnostics program
  • ECU has injector driver capability up to 10 cylinders
  • Injector drivers are based on “closed loop peak & hold current control”
  • Constant monitoring of the injectors provide diagnostics for;
    • Overload
    • Driver temperature
    • Short circuit
    • No load (open circuit)
  • Laptop installed software for diagnostics, service and parameter loading operates with Windows 98, 2000, XP and Vista
  • Optional CAN-controller (2.0b) enables communication with OEM CAN-bus
  • Complete wiring harness: colour coded, with text and numbers for simple and efficient installation

VSI 2.0 LPG conversion system

The Prins VSI-2.0 system is the latest development in alternative fuels. The system is an evolution of the VSI system which has proven itself over the last 10 years. 

The Prins VSI-2.0 system is available as an LPG as well as a CNG version and is also suitable for the latest generation Direct Injection engines (VSI-DI). 

The key components of the system are all of OEM quality and specially designed for LPG and CNG applications. All components comply with the strictest regulations and certifications. The installation of the components is very easy due to the compact design of the components.

Features of VSI 2.0

  • Adjustable LED colours of fuel selector switch for elegant integration with the car's dashboard
  • It is possible to set the tank levels manually
  • The system has extensive diagnostic functions making it easy for your LPG technician to diagnose problems.
  • Integrated checklist for switch over procedure, so fast diagnostic
  • Extended actuator test, possible to check/control every valve manually
  • Modular Plug & Play wiring loom, main and injector wiring are separate
  • Freeze frame information of the first 2 errors
  • 32-bits ECU of OEM quality with integrated injector similator
  • One diagnostic tool for all Prins systems
  • Pre-heated injectors to avoid sticking of the injectors at cold start
  • Emergency gas start function is integrated to allow you to start your engine if the petrol system fails
  • No RPM module necessary
  • Sleep current ECU < 1 mA
  • Complies with R67-01 and R115 regulations
  • 3 years warranty
  • VSI 2.0 Fuel Selector Switch
    Elegant and Easy
  • VSI Regulator
    Compact and Powerful
  • Keihin Injectors
    Automotive OEM quality
    LPG injectors
  • VSI 2.0 ECU
    High quality and reliable
  • Small and compact design suits all cab interiors
  • Fuel selection via smart touch control.
  • Informs operator of LPG tank contents, audible buzzer to alert low level switching or fault codes plus illuminated fault code warning with LED
  • Self programmable LED colours
  • R67-01 & Canadian CSA homologated
  • Compact design: Ø125x95mm
  • Solid design: tested to over 60 bar burst pressure
  • Black anodised aluminium
  • Membranes & vulcanised seat & o-rings: tested in extreme conditions with temperatures from -30ºC to +120º C (other specs optional)
  • Over pressure is vented via 6mm hose to inlet manifold
  • Adjustable pressure: 1.7 – 2.6 Bar
  • System pressure control with single stage valve.
  • System pressure is independent to inlet pressure (MAP).
  • Optional MAP connection is available (for turbo charged engines).
  • Very stable dynamic pressure behaviour compared to other single stage reducers.
  • Flexible lock off valve both standard as BFC (big flow capacity as used in Australia) as well.
  • Integrated temperature sensor. (NTC resistor, R=2500 ohm at 20°C).
Injects LPG/CNG into the inlet manifold for each cylinder. Developed by Keihin Corp, Japan, one of the world’s leading injector manufacturers, in cooperation with Prins. Injectors are of OEM quality and reliability. INJECTOR RAIL
  • R67-01 & R110 homologated.
  • PA6 glassfibre “re-inforced” nylon.
  • Only right inlet version available. If required the fitter can easily convert the right inlet version into a left inlet version.
  • High profile look.
  • Light weight and compact.
  • Uncomplicated fitting.
  • Assembled and leak tested at factory prior to dispatch.
  • 2, 3, 4 or 5 cylinder assemblies.
INJECTORS
  • OEM quality injector
  • Lifespan at least 290,000,000 cycles or 240,000 km -> 2 year unlimited warranty!
  • Excellent linear flow range (linear 2% accuracy form min to max flow). Linear flow starting from 2.5 msec.
  • Low-resistance of 1.25 Ohm.
  • 5 injector sizes for engine capacities from 9 kW till 45 kW each cylinder. (e.g. 3 cyl with 27 kW to 10 cyl. 450 kW).
  • The heart of the system controls all the functions of the VSI-2.0 system for safety, switch over strategy, fuel injection and diagnostics
  • OEM watertight case with ventilation plug
  • One 81-pins connector for the master wiring loom and a small 40-pins connector for the specific engine configurations wiring loom
  • A number of different communication interfaces for more advanced OEM engine integration
  • High performance 32-bits automotive controller combined with full diagnostic and self protected power-output circuits for high reliability and durability
  • Diagnostics, service and parameter-load software operates from Windows XP / Vista / 7 applications

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