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> Maybe modern cars have enough sensors to know if the engine is actually driving the wheels so they can disable the throttle under braking in those situations.
by kw71 11y ago
> Maybe modern cars have enough sensors to know if the engine is actually driving the wheels so they can disable the throttle under braking in those situations.
This is possible, any car with traction control has wheelspeed sensors for all wheels, and manual shift cars have a pushbutton switch on the clutch pedal arm (for enabling the starter, or for a car with electronic throttle, for cancelling the cruise control.)
- pedrocr 11y agoThose are not enough. You need a sensor in the gearbox itself to know if you are in gear. Otherwise you can have the clutch engaged and the wheels spinning but not have the engine connected to the wheels as naturally happens in the middle of a double clutch shift.
- kw71 11y agoCouldn't it work by checking that crankshaft speed increases remarkably without any corresponding increase in wheel speed? I don't know how racetrack drivers do this, but when I downshift, the crankshaft has some opportunity to fall a little while I get the gearbox in neutral and engage the clutch again. Then the crankshaft speed rises to 4000 rpm or more.