SFI SYSTEM


  1. CONSTRUCTION


    1. Magneto-Resistance Element (MRE) type cam position sensors (No. 2 crank position sensors) (intake and exhaust) are used. To detect the position of each intake camshaft, a timing rotor that is secured to the intake camshaft in front of the camshaft timing gear assembly is used to generate 3 pulses for every 2 revolutions of the crankshaft. The timing rotor for each exhaust camshaft is part of the respective camshaft.

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    2. An MRE type cam position sensor (No. 2 crank position sensor) consists of an MRE, a magnet and a sensor. The direction of the magnetic field changes due to the profile (protruding and non-protruding portions) of the timing rotor, which passes by the sensor. As a result, the resistance of the MRE changes, and the output voltage to the ECM changes to high or low. The ECM detects the camshaft position based on this output voltage.

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