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An electronic foot pedal vehicle control system includes a foot pedal of rigid one-piece molded plastic construction having a base and a pedal arm cantilevered from the base. An electronic subassembly is insert molded into the base of the foot pedal, and includes a force sensor disposed in the base

An electronic foot pedal vehicle control system includes a foot pedal of rigid one-piece molded plastic construction having a base and a pedal arm cantilevered from the base. An electronic subassembly is insert molded into the base of the foot pedal, and includes a force sensor disposed in the base adjacent to the pedal arm for providing an electrical sensor signal as a function of force applied to the pedal arm by a vehicle operator. Electronic circuitry is responsive to the sensor signal for providing a pedal output signal to control at least one variable of vehicle operation. The electronic circuitry preferably has programmed hysteresis characteristics so as to allow limited force variation on the pedal without changing the output signal from the electronic circuitry.

대표청구항 ▼

An electronic foot pedal vehicle control system includes a foot pedal of rigid one-piece molded plastic construction having a base and a pedal arm cantilevered from the base. An electronic subassembly is insert molded into the base of the foot pedal, and includes a force sensor disposed in the base

An electronic foot pedal vehicle control system includes a foot pedal of rigid one-piece molded plastic construction having a base and a pedal arm cantilevered from the base. An electronic subassembly is insert molded into the base of the foot pedal, and includes a force sensor disposed in the base adjacent to the pedal arm for providing an electrical sensor signal as a function of force applied to the pedal arm by a vehicle operator. Electronic circuitry is responsive to the sensor signal for providing a pedal output signal to control at least one variable of vehicle operation. The electronic circuitry preferably has programmed hysteresis characteristics so as to allow limited force variation on the pedal without changing the output signal from the electronic circuitry. nic current signal (IS(t)) is measured by an ionic current probe during a combustion stroke in combustion chambers of the internal combustion engine, from which a value of a knocking intensity (KI) is evaluated, wherein fluctuations in an intensity of the raw ionic current signal (IS(t)) are compensated for by performing a normalization of the raw ionic current signal (IS(t)) or the value of the knocking intensity (KI), wherein the chronological form of the raw ionic current signal (IS(t)) is composed first of ignition faults, then of a first maximum of the combustion, and then of a second maximum of the raw ionic current signal, and wherein an ionic current amplitude value (IM), that is the maximum value of the second maximum of the raw ionic current signal (IS(t)), or an ionic current integral value (II), that is the value of an integration of the raw ionic current signal (IS(t)), is currently determined for performing the normalization after each combustion stroke. 2. Method according to claim 1, wherein, for performing the normalization, the quotient is formed from averaged ionic current amplitude values (IM) of the previous combustion strokes and a present ionic current amplitude value (IM), or the quotient is formed from averaged ionic current integral values (II) of the previous combustion strokes and a present ionic current integral value (II). 3. Method according to claim 1, wherein, as normalization, the raw ionic current signal (IS(t)) or the value of the knocking intensity (KI) is divided by the ionic current amplitude value (IM). 4. Method according to claim 1 wherein, as normalization, the raw ionic current signal (IS(t)) or the value of the knocking intensity (KI) is divided by the ionic current integral value (II). 5. Method according to claim 2 wherein, as normalization, the quotient from the averaged ionic current amplitude values (IM) and the ionic current amplitude value (IM) is multiplied by the raw ionic current signal (IS(t)) or the value of the knocking intensity (KI). 6. Method according to claim 2 wherein, as normalization, the quotient from the averaged ionic current integral values (II) and the ionic current integral value (II) is multiplied by the raw ionic current signal (IS(t)) or the value of the knocking intensity (KI). 7. Method according to claim 1 wherein the raw ionic current signal (IS(t)) is filtered, windowed, rectified and integrated to provide the value of the knocking intensity, in the form of a knock integral value (KI), for evaluation. 8. Method according to claim 1 wherein the internal combustion engine has spark plugs, which are respectively used as the ionic current probe. 9. Method according to claim 2 wherein the averaging of the ionic current amplitude value (IM) or the ionic current integral value (II) is performed as a sliding averaging. 10. Method according to claim 9 wherein the averaged ionic current amplitude values (IM) or the averaged ionic current integral values (II) of the previous combustion strokes are subtracted from the present ionic current amplitude value (IM) or from the present ionic current integral value (II) to form a first difference, the first difference is multiplied by a weighting factor (k) to form a first product, and the first product is then added to the averaged ionic current amplitude values (IM) or to the averaged ionic current integral values (II) of the previous combustion strokes to form the sliding average. 11. A method of detecting knocking combustion in an internal combustion engine having at least one combustion chamber operating in a succession of combustion cycles, comprising the following steps carried out for a respective present combustion cycle of said succession of said combustion cycles: a) sensing an ionic current in said combustion chamber during a combustion stroke of said present combustion cycle, and providing a raw ionic current signal corresponding to said ionic current, wherein said raw ionic current signal has a chron