Diesel engine electronic variable fuel correct time system regulating method
A timing system and adjustment method technology, applied in electrical control, mechanical equipment, engine control and other directions, can solve the problems of inability to adjust, high test cost, uncertain test cycle, etc., to achieve simple adjustment process, save test cost, Adjust the effect of short time
Active Publication Date: 2008-10-15
HUDONG HEAVY MACHINERY
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Problems solved by technology
[0024] 2. A lot of manpower and material resources are wasted, and the cost of test run is relatively high, and it also causes uncertainty in the test run cycle, which is not conducive to production arrangements
[0025] 3. In the actual operation process, if the initial value is not set properly, the value will iterate farther and farther, becoming a divergent sequence, and there is no result. When this happens, everything has to be restarted
Therefore, this method is time-consuming and labor-intensive, and sometimes even the continuous moving of the car cannot be adjusted for a day or two.
Method used
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Embodiment 1
[0043] Taking 5S60MCC as an example, the adjustment process of the new adjustment method mainly includes the following steps:
[0044] 1. Input each initial value in the user interface of the electronic governor (see the attached table for details), P Max is 151, ΔP Max for 35, P k is 0.90, P Min 0.2, ΔP k 35, ΔP Mcr 15,K I 0.35, ΔP Maxcontrol for 10, P Offsct is 0;
[0045] 2. Run the diesel engine to 90% of the turning point. Measure the explosion pressure at this point as 145Bar, the compression pressure as 118Bar, the scavenging pressure as 3.2, and the compression ratio Kc as 36.6. The measured explosion pressure is lower than the design value. The parameter P inside the gearbox offect , re-measure the explosion pressure, the explosion pressure is 150Bar, the compression pressure is 117Bar, the measured value of the explosion pressure meets the design requirements, and then calculate the difference ΔP between the explosion pressure and the compression pressure 1...
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The present invention relates to a diesel engine electronic variable fuel oil timing system regulation method. Said method mainly includes the following steps: (1), inputting all the initial values into electronic governor user interface of diesel engine; (2), the diesel engine is operated to turning point, calculating difference value delta P1 between explosion pressure and compression pressure, at the moment, recording current value I1 outputted from governor; (3, diesel engine is operated to maximum power point, calculating the difference value delta P2 between explosion pressure and compression pressure, at the moment, recording current value I2 outputted from governor; and (4), according to the current operation formula I=Ki(delta P+Poffect)+4, respectively substituting the values of delta P1, I1, delta P2 and I2 of steps of (2) and (3) into said formula so as to accurately obtain values of K1 and Poffect, inputting said two values into governor so as to complete the regulation process.
Description
technical field [0001] The invention relates to a marine diesel engine, in particular to a method for adjusting a variable fuel timing system. Background technique [0002] The main function of the diesel engine electronic variable fuel timing system (hereinafter referred to as VIT system) is to make the maximum explosion pressure (referred to as explosion pressure) in the cylinder of the diesel engine be at a relatively large value by changing the fuel injection advance angle of the diesel engine, so as to save fuel. Improve the economy of diesel engine operation. [0003] The working principle of variable fuel is to collect the scavenging pressure signal of the diesel engine through the scavenging pressure sensor installed on the scavenging manifold of the diesel engine, and input the collected scavenging pressure signal to the electronic governor, and then combine the speed control The speed signal in the speed controller and the position signal of the governor actuator ...
Claims
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IPC IPC(8): F02D41/00
Inventor 丁佐孙永元
Owner HUDONG HEAVY MACHINERY