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MULTIPLE FUEL INJECTION CONTROL OPERATION [MZR-CD (RF Turbo)]

BME014000140T46
• The multiple fuel injection control has five injection patterns with varying injection frequencies. The PCM selects the optimum injection pattern according to vehicle conditions and performs injection a maximum of five times.
• The main injection is injected in order to secure engine performance.
• The pre-injection is injected in order to improve emission performance.
• The pilot injection is injected in order to reduce noise.
• The follow-up injection is injected in order to improve emission performance.

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1 | Crank angle standard position
2 | TDC
3 | CKP sensor signal
4 | Injection pattern for five injections
5 | Injection pattern for four injections
6 | Injection pattern for three injections
7 | Injection pattern for two injections
8 | Injection pattern for one injection
9 | Pilot injection
10 | Pre-injection
11 | Main injection
12 | Follow-up injection

## Operating Condition

• The PCM determines the injection frequency based on the engine speed, fuel injection amount, and signals from each sensor.
• When the engine is started, the PCM calculates the injection frequency based on the engine coolant temperature and engine speed.