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Calibrating method and system for oil injection pump used for diesel oil / natural gas double-fuel engine

A dual-fuel engine and calibration method technology, which is applied in the direction of engine testing, machine/engine, charging system, etc., can solve problems such as unstable operation of dual-fuel engines, deterioration of engine emissions, and uneven fuel injection volume, and achieve emission reduction. Normal, uniform fuel injection, stable work effect

Inactive Publication Date: 2005-04-27
FAW GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the dual-fuel engine only needs less pilot diesel oil per cycle, when using the fuel injection pump for diesel engines, the fuel injection pump works at the position of the small rack, and the fuel injection amount of each cylinder here is very uneven, resulting in the failure of the dual-fuel engine Rough work, worsening engine emissions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] CA6110ZLA5N2 diesel / natural gas dual-fuel engine is the fuel injection pump calibrated by this calibration method. First, the fuel injection pump to be calibrated is fixed on the test bench, and the calibration is carried out through the following steps: The first step is to use the stepper motor controller 4-step The feeder motor 2 issues a command to feed 15mm to the left, the stepper motor 2 starts to act and drives the stop bar 3 to move to the left, and the rack 7 moves to the left under the push of the stop bar 3 until it reaches the mechanical zero position. In the second step, according to the working needs of different diesel / natural gas dual-fuel engines, determine the different pinion rack displacements of 5mm that meet their operating requirements. , the rack 7 of the fuel injection pump 6 is controlled by the stepping motor 2 to move to the right to 5mm, the fuel injection quantity of each cylinder is measured using the fuel injection pump test bench 5, and ...

Embodiment 2

[0014] The diesel / natural gas dual-fuel engine is the fuel injection pump calibrated by this calibration method. First, the fuel injection pump to be calibrated is fixed on the test bench, and the calibration is carried out through the following steps: The first step is to step by stepper motor controller in 4 directions. The motor 2 issues a command to feed 13mm to the left, the stepper motor 2 starts to act and drives the stop rod 3 to move to the left, and the rack 7 moves to the left under the push of the stop rod 3 until it reaches the mechanical zero position. In the second step, according to the working needs of different diesel / natural gas dual-fuel engines, determine the different pinion rack displacements of 3mm that meet their operating requirements. , the rack 7 of the fuel injection pump 6 is controlled by the stepping motor 2 to move to the right by 3mm, the fuel injection quantity of each cylinder is measured using the fuel injection pump test bench 5, and the fu...

Embodiment 3

[0016] The diesel / natural gas dual-fuel engine is the fuel injection pump calibrated by this calibration method. First, the fuel injection pump to be calibrated is fixed on the test bench, and the calibration is carried out through the following steps: The first step is to step by stepper motor controller in 4 directions. The motor 2 issues a command to feed 17mm to the left, the stepper motor 2 starts to act and drives the stop rod 3 to move to the left, and the rack 7 moves to the left under the push of the stop rod 3 until it reaches the mechanical zero position. In the second step, according to the working needs of different diesel / natural gas dual-fuel engines, determine the different pinion rack displacements of 8mm that meet their operating requirements. , the rack 7 of the fuel injection pump 6 is controlled by the stepping motor 2 to move to the right to 8mm, the fuel injection quantity of each cylinder is measured using the fuel injection pump test bench 5, and the fu...

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PUM

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Abstract

The present invention is the calibration method and control system for the fuel injection pump in diesel oil / natural gas double-fuel engine. The calibration system consists of diesel oil amount controller, stepped motor, stop rod, stepped motor controller and fuel injection pump test bed, of which, the diesel oil amount controller is installed on the fuel injection pump, the stop rod has its central line coinciding with the central line of fuel injection pump rack, the stepped motor is provided with stepped motor controller and matched with the stop rod, and the stop rod drives the rack to move. The present invention can equalize the fuel injection amounts of the cylinders in the fuel injection pump, stabilize the operation of the double-fuel engine and make the exhaust normal.

Description

Technical field: [0001] The invention relates to a calibration method of a fuel injection pump for a diesel / natural gas dual-fuel engine and a control system for completing the method. Background technique: [0002] When a diesel / natural gas dual-fuel engine works, a certain amount of diesel oil needs to be injected into the cylinder in each working cycle. The diesel oil is compressed and ignites to ignite the natural gas in the cylinder to realize the normal operation of the engine. Typically, dual fuel engines use the same fuel injection pump as the original diesel engine. Since the dual-fuel engine only needs less pilot diesel oil per cycle, when using the fuel injection pump for diesel engines, the fuel injection pump works at the position of the small rack, and the fuel injection amount of each cylinder here is very uneven, resulting in the failure of the dual-fuel engine Work is not smooth and engine emissions deteriorate. Invention content: [0003] The object of ...

Claims

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Application Information

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IPC IPC(8): F02M65/00
Inventor 窦慧莉戈非邢喜春
Owner FAW GROUP