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

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 ...

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