Reducing excess fuel consumption, engine running time and emissions

The Ardent Engine Shutdown Unit is designed to reduce excess fuel consumption, engine running time and emissions by monitoring and limiting vehicle idle time.

The V-ESU automatically shuts down the vehicle engine after a defined period of time. A warning signal is given before the engine is cut, allowing the driver to cancel the process.

  • Configurable system

    Configurable system

    The Engine Shutdown Unit offers configurable switch settings for the engine shutdown delay period - 5, 8 or 10 minutes.

  • Reliable vehicle monitoring

    Reliable vehicle monitoring

    The unit monitors 3 critical inputs to track vehicles state - handbrake, vehicle speed and gearbox position.

  • Multi-Message Compatible

    Multi-Message Compatible

    The Engine Shutdown Unit is compatible with the Multi-Message System, which allows an audible warning message to be delivered to the driver - "Warning, vehicle will shut down in 30 seconds."

How the Engine Shutdown Unit Works

The Engine Shutdown Unit monitors the vehicle running state by connecting the unit inputs to three critical vehicle signals. The recommended signals are:

  • Vehicle handbrake applied
  • Vehicle not moving (speed below 5km/h)
  • Gearbox in neutral position

When all three inputs are active for a pre-determined period of time, the unit's engine shutdown timer will start. The shutdown time period can be preset to 5, 8 or 10 minutes.

If all inputs remain active during the shutdown period, then the unit provides a switch output which can be used to break the ignition switch circuit. An additional switched output which is active for 30 seconds before the timer window has expired is provided for a pre-warning message provided through the Ardent Multi-Message System – “Warning, vehicle will shut down in 30 seconds”.

Vehicle Idling Legislation

Vehicle idling is an offence under the England Road Traffic (Vehicle Emissions)(Fixed Penalty) (England) Regulations 2002. The legislation covers all vehicles on public roads, including buses and coaches, and fixed penalties of £20 for stationary idling offences and £60 for emissions offences may be issued if you fail to comply. In addition, Transport for London advises its  bus drivers to turn off their engines at bus stops and when regulating the servicem with the aim of all London buses being zero emission vehicles by 2037.

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