• An integrated starter generator (ISG) has been adopted for efficient electric power generation when the vehicle decelerates, engine start, and motor assist.
• 12 to 24.3 V is generated according to the vehicle conditions to charge the capacitor (Mazda M Hybrid).
• Has a drive function for the i-stop control (engine restart) and motor assist.
Construction, Operation
• The ISG is installed on the left, front side of the engine.
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• The ISG output is controlled by the built-in inverter.
• The inverter has the following protection functions.
1. Excess temperature protection function
• If the internal circuit reaches the specified temperature, the ISG output is restricted to suppress an increase in the ISG temperature.
2. Excess voltage protection function
• If excessive voltage output is commanded by the PCM, the ISG output voltage is restricted to suppress application of excess voltage to the capacitor .
3. Excess current protection function
• If the current to each part of the ISG exceeds the specified value, the current is interrupted to restrict or stop the ISG output.
• The initial excitation current to the rotors is supplied from the capacitor (Mazda M Hybrid). When excitation current is supplied from the capacitor (Mazda M Hybrid) and the generator begins generating electricity, the excitation current from the capacitor (Mazda M Hybrid) is interrupted. After the generator begins generating electricity, the power generated by the generator is used for excitation current.
• If a malfunction occurs, the ISG stores it as a DTC. In addition, the vehicle condition when a malfunction occurred is stored as snapshot data. The stored DTCs and snapshot data can be read using the Mazda Modular Diagnostic System (M-MDS). (SKYACTIV-G 1.5 (with EGR cooler)
• Data related to input signals, calculation values, output signals, and system conditions of the ISG can be monitored using the Mazda Modular Diagnostic System (M-MDS). (SKYACTIV-G 1.5 (with EGR cooler)