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Common rail fuel system driving method, device, vehicle and storage medium

A fuel system and driving method technology, applied in engine control, machine/engine, fuel injection control, etc., can solve the problem of slow rail pressure establishment and achieve the effect of shortening the time for rail pressure establishment

Active Publication Date: 2022-03-11
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different control methods of the common rail fuel system, the common rail fuel system with the electronically controlled unit pump as a high-pressure pump is slower to establish rail pressure than the common rail fuel system with the fuel metering unit

Method used

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  • Common rail fuel system driving method, device, vehicle and storage medium
  • Common rail fuel system driving method, device, vehicle and storage medium
  • Common rail fuel system driving method, device, vehicle and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] figure 1 It is a flow chart of a common rail fuel system driving method provided in Embodiment 1 of the present invention, figure 2 An example diagram of the common rail fuel system structure is provided. After the oil stored in the fuel tank is filtered by the filter, the oil is pumped by the unit pump, and the oil in the low-pressure oil circuit is pressed into the high-pressure oil rail, and the high-pressure oil rail supplies The fuel injector injects fuel. When the unit pump is pumping oil, it is necessary to turn on the unit pump to pump oil. When the unit pump is not turned on, the oil is discharged. The oil in the oil discharge process returns to the oil through the unit pump return port and flows back to the in the fuel tank. The pressure relief valve is used to protect the fuel rail from damage when the fuel pressure in the fuel rail is too high. This embodiment is applicable to the situation of driving a common rail fuel system, and the method can be perf...

Embodiment 2

[0037] image 3 It is a flow chart of a method for driving a common rail fuel system provided by Embodiment 2 of the present invention. The technical solution of this embodiment is further refined on the basis of the above-mentioned technical solution, and specifically mainly includes the following steps:

[0038] Step 210: Determine the oil pumping parameters, so that the first unit pump and / or the second unit pump performs oil pumping according to the oil pumping parameters.

[0039] Among them, the working parameters of the pump oil can be specifically understood as the working parameters of the unit pump, at least including: the peak current of the electronically controlled unit pump, the maintenance current of the electronically controlled unit pump, the duration of the peak current of the electronically controlled unit pump, the electric The duration of the maintenance current of the single-control pump, the maximum limit of the total time of the electric single pump, t...

Embodiment 3

[0067] Figure 6 A structural diagram of a common rail fuel system driving device provided by Embodiment 3 of the present invention, the device includes: a unit pump co-start module 31 and a unit pump alternate module 32 .

[0068] Among them, the unit pump co-starting module 31 is used to drive the first unit pump and the second unit pump to start the oil pumping work at the same time according to the first unit pump command when the engine is started and the first oil pump command is detected. The unit pump alternation module 32 is used to drive the first unit according to the second oil pump command when it is detected that the crankshaft target disc signal of the engine is synchronized with the camshaft target disc signal and a second oil pump command is generated. The pump and the second monomer pump alternately start pumping oil.

[0069] In the embodiment of the present invention, when the engine is started and the first oil pump command is detected, the first unit pum...

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Abstract

The embodiment of the invention discloses a common rail fuel system driving method, device, vehicle and storage medium. The method includes: when the engine is started and it is detected that a first oil pumping command is generated, driving the first unit pump and the second unit pump according to the first oil pumping command and simultaneously starting the oil pumping operation; monitoring the crankshaft of the engine When the target disc signal is synchronized with the camshaft target disc signal and a second oil pump command is generated, the first unit pump and the second unit pump are driven to alternately start pumping oil according to the second oil pump command. By starting the unit pump 1 and unit pump 2 at the same time to work according to the first pump oil command when the engine is started, the problem that the unit pump starts to pump oil after the common rail fuel system is synchronized is solved, and the common rail is shortened. The time for the fuel system to build up rail pressure.

Description

technical field [0001] Embodiments of the present invention relate to vehicle startup technology, and in particular to a common rail fuel system driving method, device, vehicle and storage medium. Background technique [0002] The diesel engine of traditional vehicles has been recognized by the market for its high thermal efficiency, low weight per unit power, less failures, easy maintenance, less power failure, high safety and reliability, especially in commercial vehicles, heavy vehicles, ships, large Fields such as engineering installations have an unshakable position. [0003] The starting time of a diesel engine is an important indicator for evaluating the starting performance of a vehicle, and it is also a parameter basis for commercial vehicle users to evaluate a vehicle. In order to meet the increasingly stringent emission regulations, the fuel system of diesel engines generally adopts a high-pressure common rail fuel system. The starting time of the diesel engine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/38F02D41/00F02D29/02
CPCF02D41/3827F02D41/3854F02D41/3082F02D41/0097F02D41/009F02D29/02F02D2200/101
Inventor 李东张鹏王明卿撒占才
Owner FAW JIEFANG AUTOMOTIVE CO