JP2607730B2 - Diesel engine cylinder lubrication system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic lubrication device applied to lubrication of cylinder lubricating oil of a diesel engine.

[Conventional technology]

In conventional medium and large-sized diesel engines, the setting of the cylinder lubrication amount is all performed manually.

Therefore, the lubrication amount corresponding to the load fluctuation output level of the engine is not set accurately. Also, the amount of lubrication was monitored at the level of the original tank oil level, and was recorded only as a total amount.

[Problems to be solved by the invention]

As described above, in the conventional case, the amount of lubrication to the cylinder is manually adjusted, so it is not necessarily adapted to the operating condition of the engine, and the piston ring is worn due to insufficient lubricating oil on the inner surface of the cylinder. This causes problems such as seizure and abrasion of the cylinder liner.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional apparatus, to automatically and optimally adjust the amount of lubrication in accordance with the engine and operating conditions, to extend the life of a cylinder lighter and improve the reliability of the engine. To provide a cylinder lubrication device.

[Means for solving the problem]

The present invention solves the above-described problems, and in a cylinder lubricating apparatus for setting a lubricating amount to a cylinder of a diesel engine, a detection signal of an engine speed and a fuel rack amount is input, and from this input signal, Calculating the time change of the engine speed, calculating the fluctuation amplitude of the engine speed and the rack amount from the respective detection signals, and calculating the torque rich amount that is the torque increase amount from the steady torque, Alternatively, when the torque rich amount is larger than that during the normal operation, a controller is provided for increasing the cylinder lubricating amount, and an actuator for controlling the lubricating amount of the lubricator by an output signal from the controller is provided.

(Operation)

The controller from the host system the engine speed Ne,
Receives the fuel rack amount Rc and the command signal, analyzes the operating condition of the engine according to a program input in advance, automatically determines the adjustment amount, determines the lubrication handle shaft position, and moves the lubrication handle shaft position to the handle position via the actuator. Activate.
Further, the actuator obtains a feedback signal of the handle position to perform accurate handle positioning.

In addition, the number of discharge times of the lubricator (= the number of revolutions of the lubricator) and the oil discharge amount are calculated from the engine rotational speed and the handle position signal, the current lubricating amount is calculated, and the lubricating amount in each adjustment mode is recorded.

As described above, it is possible to adjust the amount of lubrication according to the operating condition of the engine and to accurately grasp the amount of lubrication, and to extend the life of the cylinder liner and improve the reliability of the engine.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic diagram of a lubrication amount control device according to a first embodiment of the present invention, FIG. 2 is a main control flowchart diagram, FIG. 3 is a flowchart of an engine operation condition analysis and adjustment mode determination flowchart, and FIG. FIG. 5 is a flow chart of lubrication calculation and recording, and FIG. 5 is a diagram showing the relationship between the operation status and the lubrication amount.

In the medium and large-sized diesel engine 1, a lubricator 4 that discharges a fixed amount of oil for lubrication of the cylinder liner 2 and the piston 3.
And a lubrication rod 5 attached to the cylinder for lubricating the cylinder.

In FIG. 1, 6 is an actuator, 7 is a gear box, 14 is a handle shaft for setting the amount of lubrication of the oil device 4,
The lubricating oil amount setting handle shaft 14 is connected to the actuator 6 via the gear box 7 to automatically adjust the lubricating amount. Reference numeral 13 denotes a controller that outputs a control signal to the actuator 6, and reference numeral 12 denotes a host system that inputs various commands or operation signals to the controller 13.

The controller 13 includes an operation display unit, a control unit, and a power supply unit. The controller 13 receives a command signal from the host system 12, a steering wheel position detection signal from the actuator 6, and the like, performs an operation described below, and outputs an output signal and an actuator. 6 is output.

Reference numeral 9 denotes a hook amount sensor for detecting a pump rack amount of the fuel injection pump 8, and reference numeral 11 denotes an engine speed sensor for detecting a speed of the crankshaft 10.

The controller 13 determines the operating state of the engine, calculates the amount of lubrication, and outputs the position control of the actuator 6. This control mainly uses signals of the engine speed Ne and the fuel pump rack amount Rc input through the host system 12.

The upper system 12 provided as the existing equipment of the engine is provided with a rack amount detection signal Rc from the rack amount sensor 9 of the fuel pump 8.
And a rotation speed detection signal of an engine speed sensor 11 attached to the crankshaft 10, and outputs these data to the controller 13 together with various command signals.

FIG. 2 shows a main control flowchart programmed in the controller 13. In the figure, data reading
At 21, the Ne, Rc, various command signals and the position of the lubrication amount setting handle shaft 14 detected from the actuator 6 are read.

The automatic priming 22 continuously rotates the lubrication amount setting handle shaft 14 during a turning operation performed before and after the start of the engine, receives a turning command from the upper system 12, and performs priming automatically or by a manual operation command. As shown in FIG. 3, the current engine operation status is determined by analyzing the Ne and Rc signals, and an adjustment mode to be executed from various lubrication amount modes is selected.

That is, in a marine diesel engine, generally, the fifth
A series of operating conditions of departure, voyage, and entry of a ship as shown on the horizontal axis in the figure, and an optimal lubrication amount according to the operating condition as shown on the vertical axis in the figure (the oil amount adjusting shaft handle notch in FIG. 5) (Ie, lubrication handle position).

In Fig. 5, (1) "Inside port" is set to start the engine, and the oil amount adjustment axis handle (notch) (hereinafter referred to as handle notch) is set to MAX (maximum lubrication amount position).

(2) "Shift" includes acceleration / deceleration of the program or manual acceleration / deceleration, regardless of whether in the harbor or in the open sea. The steering wheel knot is set to + 30% during shifting.

(3) In the case of "Hiramizu", when the fluctuation of the engine speed is small, it is judged to be normal sea condition and the handle notch is set to BASE.

(4) If the fluctuation of the engine speed is large and the fluctuation cycle is long, it is judged as "swell" and the handle notch is set to + 30%.

(5) In the "stormy weather" sea condition, the engine speed Ne fluctuates greatly and the fluctuation cycle is irregular. In this case, it is judged as "stormy weather" and the handle notch is set to MAX (maximum).

The flowchart shown in FIG. 3 is based on the details of the engine operation state analysis 23 shown in FIG. 2 and judges the operating condition as shown in FIG. 5 based on the engine speed detection signal Ne and the rack amount detection signal Rc. The procedure for setting the optimal lubrication amount for the operating situation is shown.

In FIG. 3, the Ne time change calculation captures a change in the engine speed Ne to determine whether the engine is stopped or in operation. If the engine is in operation, if the speed is being changed, the lubrication amount during shifting is selected.

Fluctuation amplitude Nepp and Rcpp of engine speed Ne and rack amount Rc
As shown in Fig. 5, the fluctuations in Ne and Rc are caused by the sea conditions, so that the amplitude is captured to determine the operating conditions such as wave swell (undulation) and stormy weather. Select the lubrication amount respectively.

The torque rich degree calculation determines the degree of torque rich (a state where the rack amount is larger than the rotational speed), that is, the torque rich degree, compared with the normal operation, from the relationship between the engine speed Ne and the rack amount Rc. If there is, select the lubrication amount during torque rich. When the fluctuations of Ne and Rc are small, it is determined that the sea is normally in a flat water state, and a normal lubrication amount is selected.

In Fig. 5, Hirasui: Under normal sea conditions, the lubrication amount is the reference value (oil amount adjustment shaft handle position BASE) at the oil amount adjustment shaft handle.
Is suitable In FIG. 2, the cylinder lubricator handle position calculation 24
Then, the handle position of the lubrication amount is calculated from the characteristics of the lubricator 4 stored in advance so that the lubrication amount matches the selected lubrication amount adjustment mode in FIG. In the actuator control 25, the actuator 6 is operated in accordance with the result of the handle position calculation 24.
Is performed. In the lubrication amount calculation 26, as shown in FIG. 4, the amount of use of the lubricating oil is calculated in each adjustment mode, this is integrated, and this is stored as lubrication amount data. The lubricating amount calculation 26 also has a function of displaying the calculated oil amount of each adjustment mode and the total oil amount of all modes on the display unit of the controller 13 by a key input of an operator. Also, the length of the execution mode can be managed.

As another embodiment of the lubrication amount calculation 26, there is also a method of accumulating the working time of each adjustment mode by a timer, reading it out when necessary, and calculating based on the assumed engine speed and the discharge characteristics of the lubricator 4. .

〔The invention's effect〕

Since the cylinder lubricating device of the present invention is configured as described above, it is possible to automatically and optimally adjust the lubricating amount in accordance with the operating condition of the diesel engine, and to perform lubrication during operation as compared with conventional manual operation. Individual differences in quantity setting can be eliminated. Thus, the life of the cylinder liner can be extended and the reliability of the engine can be increased. In addition, it has a function to calculate the lubrication amount and record the lubrication amount for each adjustment mode, so that it can be used as a basic data for grasping the quantitative relationship between the lubrication amount and the cylinder liner wear and setting the lubrication amount. You can also.

[Brief description of the drawings]

1 to 5 relate to the present invention, FIG. 1 is a schematic diagram of a lubricating apparatus according to a first embodiment, FIG. 2 is a main control flowchart, and FIG. FIG. 4 is a flowchart for calculating the amount of lubrication and recording, and FIG. 5 is a diagram for setting the amount of lubrication. 1 ... Diesel engine, 2 ... Cylinder liner, 3 ...
Piston, 4 Lubricator, 5 Lubricating rod, 6 Actuator, 7 Gear box, 8 Fuel pump, 9
…… Rack amount sensor, 10 …… Crankshaft, 11 ……
Engine speed sensor, 12 Host system, 13 Controller, Lubrication amount setting handle shaft.

Claims (1)

(57) [Claims] In a cylinder lubricating apparatus for setting an amount of lubrication to a cylinder of a diesel engine, detection signals of an engine speed and a fuel rack amount are input, and a time change of the engine speed is calculated from the input signals. Calculate the fluctuation amplitude of the engine speed and the rack amount from each of the detection signals, and calculate the torque rich amount that is the torque increase amount from the steady torque, and the fluctuation amplitude or the torque rich amount is larger than that during normal operation. A cylinder lubricating device for a diesel engine, comprising: a controller for increasing the amount of lubricating the cylinder when it is larger; and an actuator for controlling the amount of lubricating the lubricator in accordance with an output signal from the controller.