Fuel pump control device and control method
A technology of a control device and a control method, which is applied in the direction of fuel injection devices, fuel injection control, fuel injection pumps, etc., and can solve the problem that the maximum amount of fuel is reduced, fuel pipes cannot supply a sufficient amount of fuel, and the amount of fuel once discharged Insufficient injection volume and other problems
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no. 1 Embodiment approach
[0020] refer to Figure 1 to Figure 6 A first embodiment of a fuel pump control device will be described.
[0021] Such as figure 1 As shown, an internal combustion engine body 11 of an internal combustion engine 10 mounted on a vehicle has four cylinders (first cylinder #1 to fourth cylinder #4). An intake passage 12 is connected to the engine main body 11 . The intake passage 12 includes an intake manifold 13 and an intake pipe 14 connected to an end portion of the intake manifold 13 on the intake upstream side. The intake manifold 13 includes a surge tank 13A connected to the intake pipe 14, an intake air introduction portion 13B provided on the intake air downstream side of the surge tank 13A, and an intake air inlet 13B provided on the intake air downstream side of the intake air introduction portion 13B. Air branch 13C. The passage cross-sectional area of the surge tank 13A is larger than the passage cross-sectional area of the intake pipe 14 and the intake air i...
no. 2 Embodiment approach
[0094] refer to Figure 9 A second embodiment of a control device for a fuel pump will be described. In this embodiment, the setting method of the unit discharge amount TPn is different from that of the first embodiment. Common reference numerals are assigned to the same configurations as those of the first embodiment, and description thereof will be omitted. In addition, in Figure 9 In , the description of "t" and the first digit "9" among the three digits of "t" indicating the timing of each operation and its subsequent three digits is omitted.
[0095] Such as Figure 9 As shown, the required injection amount calculation unit 106 calculates the required fuel injection amount Qt(1) at timing t911. After calculating the required fuel injection amount Qt(1), the injection time calculation unit 107 calculates the execution time of fuel injection, that is, the injection time Fi, based on the required fuel injection amount Qt(1) and the current fuel pressure Pr detected by t...
no. 3 Embodiment approach
[0114] refer to Figure 10 and Figure 11 A third embodiment of a fuel pump control device will be described. In this embodiment, the driving method of the high-pressure fuel pump 40 is different from that of the first embodiment. Common reference numerals are assigned to the same configurations as those of the first embodiment, and description thereof will be omitted.
[0115] Such as Figure 10 As shown, the fuel pump control device 300 has, as functional units, a target rotational speed calculation unit 101, a target torque calculation unit 102, a target fuel pressure calculation unit 103, a fuel pressure deviation calculation unit 104, an injection feedback amount calculation unit 105, a request An injection amount calculation unit 106 , an injection time calculation unit 107 , an injection start timing calculation unit 108 , and an injection valve drive unit 109 . In addition, the control device 300 has a target throttle opening calculation unit 110, a throttle valve ...
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