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Traction control A computer-controlled system that co-ordinates anti-lock braking, differential lock and engine management functions to provide optimum vehicle control under a range of driving conditions. Differential lock
A device that temporarily disables transmission differential gears in order to improve traction in difficult driving conditions.
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The engine coolant temperature sensor is a negative temperature coefficient (NTC) thermistor. It is of a similar type to the air temperature sensor. It is fitted into the water jacket close to the thermostat or bypass coolant circuit passages. The sensor measures the engine coolant temperature and provides a signal voltage to the ECU. This is used for cold-start and warm-up enrichment as well as fast idle speed control through the idle speed control valve.
2015 Porsche 918 Spyder
Carrera GT
T - Coolant temperature sensor The temperature sensor for the coolant is in the upper part of the crankcase, near the cylinder head gasket face of cylinder 9. A race car generates a lot of electro-magnetic noise from the ignition and telemetry systems. This means that there must be minimal wiring length between the strain gauges and the amplifiers. Secondly, to provide representative data, the weight of the whole system must not alter the dynamics of the car.
2006 BMW 320si WTCC Integrated strain gauges in the gearshift lever trigger a power signal.
Ferrari F138 Strain Gauging is a form of load sensing. Parts are instrumented with a very thin metallic foil. A strain gauge consists of a thin metallic filament (wire) arranged in a pattern on top of a foil which is bonded (glued) to a part. As an example the part may be a suspension pushrod from a formula car. As the part deforms under load, the filament is microscopically stretched in length and because of this there is a change in its electrical resistance. When the circuit is active (powered), such change in resistance causes a small voltage change. This can be amplified and calibrated on a rig so that for a given load (deformation) the voltage is known. In motorsport, amplifiers are mostly non-ratiometric whereby the supply voltage does
not (within reason) affect the reading, until the voltage is too low or high for the gauge to actually function properly. This allows data to be compared easily. Some applications may however have a ratiometric amplifier if the software then uses a reference rail voltage to calculate the corrected gauge reading. The latter method is in a way more versatile and has slightly simpler circuitry. The aero rake itself could be used for measuring air speed, angle flow, pressure (Pitot-Static probe) and even temperature.
Infrared (IR) sensors for measuring temperature of tires/wheels
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