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Electrical control upright arrangement integrated pump / valve - pipe - nozzle spraying system

An in-line combination and injection system technology, applied in the direction of charging system, electrical control, fuel injection control, etc., can solve the impossible regulation of fuel injection rate and fuel injection pressure, can not directly change the fuel quantity and timing, can not do various Cylinder-by-cylinder control and other issues, to achieve the effects of system transplantation, simple structure, and simplified oil pump structure

Inactive Publication Date: 2007-04-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of system has strong production inheritance and is easy to install. It can realize partial optimization of fuel quantity and timing. However, since the original fuel injection device and fuel injection characteristics have not changed, it is generally impossible to optimize the fuel injection rate and fuel injection. pressure regulation
In addition, because only position control can be performed, the oil volume and timing cannot be directly changed, there are many intermediate links, the control response is slow, and the cylinder-by-cylinder control of each cylinder cannot be achieved.

Method used

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  • Electrical control upright arrangement integrated pump / valve - pipe - nozzle spraying system

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Embodiment Construction

[0011] The specific structure, working principle and best embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0012] Figure 1 is a schematic diagram of the overall structure of an electronically controlled in-line combination pump / valve-pipe-mouth type diesel injection system. It mainly includes electronic control unit 1, in-line combination pump / valve device 6, high-pressure fuel pipe 2, fuel injector 3 and low-pressure fuel device 10 five functional modules:

[0013] The electronic control unit 1 is composed of control system hardware based on 32-bit single-chip microcomputer, engine management system software, a camshaft position sensor 28 installed on the pump body, a crankshaft position sensor 27 installed on the engine flywheel housing, and a Accelerator position sensor 26, and various temperature sensors 25, pressure sensors 24, signal switch 23, and communication interface 22 for detecting the state of ...

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Abstract

This invention publicized belonged to the diesel engine fuel injection installment one kind of electric control in line combination to pump / the valve - tube - mouth to spray the diesel oil injection system. Should the injection system mainly include the electronic control unit, in line the combination pumps / the valve mechanism, the high-pressure oil pipe, the spray hole and the low pressure fuel oil system. The characteristic is in line the combination pumps / the valve mechanism plunger partner to use the direct jack-in type structure, in pump body in-line type arrangement; The plunger partner's plunger crown does not have the skewed slot, only undertakes for the oil and pressurizes the function; Integrates on in in the plunger partner plunger cavity high-pressured oil duct has the high speed solenoid valve module, solenoid valve coil and the electronic control unit is connected, by electronic control unit through solenoid valve direct control fuel injection process; This system not only causes the oil pump structure to simplify, the intensity increases, greatly enhanced has supplied the oil pressure, moreover caused for the oil process and the adjustment process decoupling, has realized through the high speed solenoid valve module to fuel injection the process direct digital control; The blow rule for a more ideal wedge, has the low initial blow rate, high host spraying rate, the fast high-pressured unloading and the remaining fluctuation of pressure are small and so on the merit: Also system layout simple, transforms few to the engine main body, the transplant is convenient.

Description

technical field [0001] The invention relates to a fuel injection device for a diesel engine, in particular to an electronically controlled in-line combined pump / valve-pipe-mouth type diesel injection system. Background technique [0002] The traditional diesel pump-pipe-mouth fuel injection system mainly includes three parts: in-line pump (or distribution pump), high-pressure oil pipe and injector. Typical systems are Bosch's P-type in-line pump system and VE-type distribution pump system. Taking the P-type in-line pump as an example, the oil quantity is controlled by the governor pulling the rack to drive the plunger to rotate, thereby changing the relative position of the plunger spiral groove and the oil return hole; the control of the start time of oil injection is achieved through inertia The mechanism changes the relative positional relationship between the crankshaft of the diesel engine and the camshaft of the oil pump; the process of high-pressure oil discharge and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/26F02D41/30F02D41/02F02M57/02
Inventor 欧阳明高李建秋杨福源李进安利强李希浩周明
Owner TSINGHUA UNIV
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