Fabrico un QUICKSHIFTER por 5€

Developing a Quickshifter for a GSXR600 K5

Introduction to Quickshifting

• A quickshifter allows for gear changes without using the clutch or reducing throttle, enhancing performance during shifts.

• Historically, racers have performed clutchless shifts by momentarily cutting power; this can be done on most bikes but is now being automated with electronics.

Advantages of Electronic Quickshifters

• Skilled riders can shift in 200-300 milliseconds, while electronic systems can achieve this in 40-80 milliseconds, improving consistency and speed.

• An electronic quickshifter considers multiple parameters (e.g., RPM and throttle position), allowing for more precise control compared to human capabilities.

Mechanism of Operation

• The system uses a pressure sensor on the shift lever to detect when a shift is desired and cuts engine power accordingly—typically through ignition cut.

• Key parameters include delay time (how long before cutting power) and cut time (duration of power cut), which are influenced by RPM and throttle position.

Implementation Details

• A two-dimensional map correlates throttle position and RPM to determine appropriate delay and cut times for optimal shifting performance.

• The design involves integrating components like MOSFET transistors for efficient power management within the bike's existing electrical system.

Sensor Integration Challenges

• The chosen analog piezoelectric sensor generates voltage spikes that may not trigger microcontroller interrupts effectively; an operational comparator will convert these signals into digital form.

Prototyping the Circuit

Testing the Setup

• A prototype circuit costing less than $5 has been assembled, featuring key components such as the MOSFET for ignition control and sensors for monitoring TPS.

Signal Processing Observations

• Initial tests show successful readings from both TPS and RPM signals; further tuning will occur under load conditions at the track next weekend.

Future Developments

Next Steps in Project Evolution

• Plans include sharing diagrams and code once development progresses further; potential upgrades may involve adding a display to provide real-time data feedback.