Engine
A technology of engine and engine speed, applied in combustion engine, engine control, machine/engine, etc., can solve problems such as response lag, and achieve the effect of reducing the deviation of fuel injection amount
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Embodiment approach 1
[0043] Next, use figure 2 The flow of the fuel injection amount correction control as Embodiment 1 will be described.
[0044] In S111, ECU20 acquires each physical quantity necessary for this control. That is, the ECU 20 acquires the engine speed Ne by the engine speed sensor 21 , the turbine speed Nc by the turbine sensor 22 , and the accelerator opening Ac by the accelerator opening sensor 24 .
[0045] Also, the ECU 20 calculates the fuel injection amount Q using the fuel injection amount map f3q (Ne, Ac) based on the engine speed Ne and the accelerator opening Ac.
[0046] In addition, in S111, the ECU 20 calculates an appropriate turbine rotation speed Ncmap as an appropriate turbine rotation speed based on the engine rotation speed Ne and the fuel injection amount Q using the appropriate turbine rotation speed setting table f3c (Ne, Ncmap, Q), and calculates the appropriate turbine rotation speed Ncmap. The turbine speed Ncmap allows the threshold ±ΔNc. The threshol...
Embodiment approach 2
[0055] Next, use image 3 , the flow of the fuel injection amount correction control according to the second embodiment will be described.
[0056] In S121, ECU2 acquires each physical quantity necessary for this control. That is, the ECU 20 acquires the engine speed Ne, the turbine speed Nc, and the accelerator opening Ac.
[0057] Also, the ECU 20 calculates the fuel injection amount Q using the fuel injection amount map f3q (Ne, Ac, Q) based on the engine speed Ne and the accelerator opening Ac.
[0058] Furthermore, the ECU 20 calculates an appropriate turbine rotation speed Ncmap from the engine rotation speed Ne and the fuel injection amount Q using an appropriate turbine rotation speed map f3c (Ne, Ncmap, Q).
[0059] In addition, in S121, the ECU 20 calculates the allowable increase / decrease amount ±ΔQ of the fuel injection amount Q. For each fuel injection amount Q, a threshold ±ΔQ is determined, which is a different value depending on the engine rotation speed Ne ...
Embodiment approach 3
[0065] Use below Figure 4 , the flow of the fuel injection amount abnormality detection control as Embodiment 3 will be described. In Embodiment 3, since S131 to S133 are the same as S121 to S123 in Embodiment 2 described above, description thereof will be omitted.
[0066] In S134, if the turbine rotation speed Nc is larger than the turbine rotation speed upper limit value Ncl, the ECU 20 stops the increase of the fuel injection amount Q.
[0067] In S135, the ECU 20 sets the fuel injection abnormality determination count value N to N=N+1.
[0068] In S136, the ECU 20 determines whether or not the fuel injection abnormality determination count value N is N<5. When YES in S136, return to S131.
[0069] In S137, in the case of NO in S136, ECU 20 determines that the engine is malfunctioning. After engine failure is determined, derating control and the like of decelerating and stopping the engine 1 in stages are performed.
[0070] In this way, an abnormality in the fuel in...
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