JPS5933872Y2 - Diesel engine fuel injection timing control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fuel injection timing control device for a diesel engine.

The purpose of the present invention is to improve the internal temperature operation and durability of the fuel injection control device of the Q fuel injection pump in order to inject fuel at the optimal fuel injection timing and achieve optimal combustion.

An object of the present invention is to improve the internal temperature operation and durability of a fuel injection control device for a fuel injection pump for injecting fuel at the optimal fuel injection timing and achieving optimal combustion.

In order to obtain the optimum combustion of the diesel engine, the automatic timer driven by the timing gear and other automatic timers are identical in order to freely select the fuel injection timing that suits the engine speed, load and operating environment. Installed in parallel with the drive system.

This hand timer has a rotation transmission member fitted with a helical spline that transmits rotational torque from a timing gear manually or by engine speed, load, etc.
The optimal phase difference is calculated by a computer by inputting intake air temperature, intake negative pressure, exhaust temperature, exhaust pressure, cooling water temperature, and other engine conditions, and provides the rotational phase difference to the rotation transmission section.

Therefore, since this rotation transmission part constantly repeats sliding, it requires sufficient heat and moisture, but conventionally, it is housed independently in a casing, so heat and moisture are insufficient and the internal temperature is low. There were problems with operation and durability.

The present invention solves these conventional problems and is characterized by an improvement in that it uses the warm lubricating oil inside the timing gear case to provide sufficient warm lubricant to the timer.

Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, 1 is the engine body, 2 is the fuel injection pump, 3 is an auto timer, 5 is an end timer, 4 is a coupling that interlocks the end timer 5 and the auto timer 3, 6 is a timing gear, and I is a timing gear. It's a gear case.

Further, 8 is an actuator that automatically controls the engine timer 5 according to instructions from a computer depending on the operating state of the engine.

As shown in FIG. 2, the structure of the timer 5 includes a rotation transmission mechanism that transmits rotational torque from the timing gear 6 while creating an arbitrary phase difference, and is housed in a casing 5a.

That is, a drive-side rotation transmission member 10 spline-fitted to the drive shaft 9 having a straight spline 9a rotated by the timing gear 6, and a driven-side rotation transmission member 10 fitted with a helical spline 12 to the drive-side rotation transmission portion #10. The driving side rotation transmitting member 10 is slid back and forth along the spline 9a by a fork 13 operated by an external operating force, and the driving side rotation transmitting member 10 and the driven side transmission member are connected by a helical spline 12. A rotational phase difference is created between the fuel injection timing and 11, and the fuel injection timing can be freely selected to be advanced or delayed.

In the present invention, the casing 5a of the hand timer 5 is placed in contact with the timing gear case 7, and the contact surface between the timing gear case 7 and the casing 5a is sealed with a sealing material 17, so that the timing gear case 7 and the casing 5a are substantially integrated.

The casing 5a is characterized by having an oil inlet 15 and an oil outlet 16 communicating with the inside of the timing gear case I.

Since the present invention is as described above, the engine speed timer 5 can freely set the fuel injection timing that is compatible with the engine speed, load, and driving environment, and eliminates HC, Co, and NOX contained in the exhaust gas. The oil in the timing gear case 7 is supplied from the oil inlet 15 into the small casing 5a, and the oil in the timing gear case I is supplied from the oil outlet 16 to the timing gear case I. It performs a circulatory action that returns the body to the inside.

Therefore, since sufficient lubricating oil is supplied to the rotation transmission section of the hand timer, the sliding action is performed at the internal temperature, which has the advantage of improving durability.

Also, since the lubricating oil supplied to the timer uses the lubricating oil of the timing gear, it is economical and has reasonable advantages.

[Brief explanation of drawings]

FIG. 1 is a side view of the device of the present invention, and FIG. 2 is an enlarged sectional view of the main part thereof. DESCRIPTION OF SYMBOLS 1...Engine body, 2...Fuel supply pump, 5...-nd timer 5a...
・Casing, 6...Timing gear, 1...
...Timing gear case 15...Oil inlet, 16...Oil outlet.

Claims (1)

[Scope of utility model registration request] In addition to an autotimer driven by a timing gear in a gear case attached to the engine body, an automatic timer operated manually or by an actuator is installed in parallel in the same drive system, and the fuel injection timing of the fuel injection pump is controlled by both timers. When a button is pressed on the device to be controlled, the casing of the hand timer is integrally installed in contact with the timing gear case, and the casing and the timing gear case are connected to each other in order to circulate warm oil in the timing gear case into the casing of the hand timer. A fuel injection timing control device for a diesel engine, comprising an oil inlet and an oil outlet that communicate with each other.