Fuel injection rate variable diesel fuel injection system and method for diesel engine
A diesel engine and injection system technology, applied in engine control, machine/engine, fuel injection control, etc., can solve problems such as not meeting the optimal requirements of the engine, and achieve the goal of reducing design difficulty, reducing driving peak torque, and improving reliability. Effect
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[0033] Example 1: Low-pressure fuel rail 2 builds a pressure of 500bar under the action of high-pressure fuel pump 1, high-pressure fuel rail 3 builds a pressure of 1000bar under the action of high-pressure fuel pump 1, and the electronic control unit ECU7 controls the electronic control injector I5 to open 3000us, and then electronic control after 2000us The unit ECU7 controls the electronic control injector II4 to open for 1000us, and the electronic control unit ECU7 controls the electronic control injector I5 and the electronic control injector II4 to close at the same time at 3000us.
Example Embodiment
[0034] Example 2: Low-pressure fuel rail 2 builds a pressure of 1200bar under the action of high-pressure fuel pump 1, and high-pressure fuel rail 3 builds a pressure of 2200bar under the action of high-pressure fuel pump 1. The electronic control unit ECU7 controls the electronic control injector I5 to open 5000us, and electronic control after 3000us The unit ECU7 controls the electronic control injector II4 to open for 2000us, and the electronic control unit ECU7 controls the electronic control injector I5 and the electronic control injector II4 to close at the same time at 5000us.
Example Embodiment
[0035] Example 3: Low-pressure fuel rail 2 establishes a pressure of 850bar under the action of high-pressure fuel pump 1, and high-pressure fuel rail 3 establishes a pressure of 1600bar under the action of high-pressure fuel pump 1. The electronic control unit ECU7 controls the electronic control injector I5 to open 4000us, and electronic control after 2500us The unit ECU7 controls the electronic control injector II4 to open for 1500us, and the electronic control unit ECU7 controls the electronic control injector I5 and the electronic control injector II4 to close at the same time at 4000us.
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