To deliver the ISG for the GMA T.50, we partnered with EMPEL Systems, experts in the design and development of high density electrical machines. The result is a 30kW device, weighing around 10kg, running at very high speed and connected to the nose of the crank via a 2:1 gearbox.
The technology behind the ISG plays a crucial role in reducing emissions. A significant proportion of gasoline vehicle tailpipe emissions are generated in the cold start period before the catalyst has reached light off temperature.
HOW IT WORKS
High-speed cranking capability allows the engine management system to stabilise intake manifold pressure and cam position before fuel is first injected. The first fuelled combustion is now achieved with optimal trapped charge levels, with the optimum cam timing and other parameters to minimise engine-out emissions and maximise catalyst heating. In this way, a reduction in the initial engine-out start emissions levels, together with a reduction in catalyst heating time, lead to a considerable reduction in vehicle tailpipe emissions over the test cycle.
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