As already mentioned CCBR stands for Carburetted Controlled Burn Rate and is a cost attractive variant of CBR using a carburettor instead of fuel injection.
For CCBR a special carburettor design (picture 'CCBR Patent Drawing') is required. The function of the port deactivation is taken over by the carburettor slider. The venturi of the carburettor in the section after the slide is split by a separating plane (16) and thus enables the switching of the ports by the carburettor slide. At part load the lower section feeds the charge motion port (11); at higher load also the filling port (12) is opened by the carburettor slider.
So it is possible to realise a CBR variant without any electric or electronic devices and complex and costly fuel injection equipment and their higher energy requirement can be avoided. Carburettor technology moreover ensures a high reliability and the additional advantage that the required space, weight and costs of the internal combustion engine can be kept low.
The CBR carburettor can be derived from a slide valve carburettor, a CV carburettor or a rotating throttle valve carburettor. In the case of a slide valve carburettor the port deactivation is taken over by the carburettor slide.
When using a CV carburettor or a rotating throttle valve carburettor two separate throttle valves - one in each port - are required. The two throttle valves are opened one after the other.
<< Previous Page
Next Page >>