This is the new technology introduced by Yamaha in their latest creations. This is highly automated technology which controls the flow of fuel into the engine by considering various aspects. The aspects are measured using various sensors.

The YCC-T (Yamaha Chip Controlled Throttle) uses a conventional motorcycle fuel injection system with twin fuel injectors per cylinder to regulate volume in accordance with calculations based on sensor input. Sensors measuring engine rpm, throttle opening, unburnt fuel in the exhaust (02 sensor), engine temperature, air temperature and intake air pressure are utilised to determine fuel injection volume. Throttle valve opening is determined by the rider’s throttle action, but instead of traditional wire operation, the throttle valves are gear driven by an electric motor. The electric motor or throttle valve position is controlled by two dedicated CPUs (1 x 32 bit and 1 x 16 bit). These CPUs use signals from the many sensors to regulate throttle valve position for maximum response and performance in all speed and rpm ranges.

In this type of system there is no active control of air intake volume. The FI system introduced on the 2002 model YZF-R1 featured a suction, or vacuum, piston that controlled intake air volume. This was followed by the FI system with a sub-throttle valve on the 2004 YZF-R1.
The advanced YCC-T technology was used to great effect on Valentino Rossi’s MotoGP Championship-winning Yamaha YZR-M1 race bike, and made its successful production bike debut on the 2006 R6. The system senses various aspects of the R1 rider’s throttle operation, and the ECU instantly adjusts the throttle valve opening to the optimum setting by means of a motor drive. The ECU features a 3 high-speed microcomputers capable of reading changes in throttle parameters at a rate of 1000th of a second. This ensures smooth, instantaneous and linear operating characteristics in response to the slightest input from the rider.

After intensive research and development, they have programmed the Y-CCT to complement the substantial performance gains associated with the new Y-CC-I intake system, and the result is a remarkably linear torque curve for increased real-world performance and even higher levels of man-machine harmony. Yamaha has redesigned the cylinder for getting maximum performance. Yamaha is about to bring many new attractive technologies like this in their future creations. For interactive sections please click here.

1. John PleliaAlgoria Says:
   December 18th, 2008 at 1:07 pm

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