Power output produced by an engine changes depending upon different fuel, in octane number, supplied thereto. In order to meet this change in the engine power output, a transmission drivingly connected to the engine is selectively set at different states, each corresponding to the fuel supplied to the...http://www.google.com.au/patents/US4677878?utm_source=gb-gplus-sharePatent US4677878 - Hydraulic transmission control system having different state corresponding to different octane fuels
