JPH02139307U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 shows the oil supply flow rate control device of the present invention, Fig. 2 shows a configuration example of a mechanical oil pump used in the oil supply flow rate control device of the present invention, and Fig. 3 shows the oil discharge amount of the mechanical oil pump. , a diagram showing the relationship between the oil requirement amount of the engine and the oil requirement amount of a specific engine operating state. FIG. Figure 5 shows that the current is proportional to the ratio of the non-energizing time b to the period a, and Figure 5 shows the relationship between the throttle valve opening of the carburetor and the oil discharge amount by moving the discharge amount control camshaft in the axial direction. Figure 6 shows the configuration of an oil pump proposed in Japanese Utility Model Application No. 62-163198, in which the relationship can be selected in two stages. FIG. 3 is a diagram showing the configuration. Explanation of symbols, 20...Mechanical oil pump,
21... Three-way solenoid valve, 22... Oil inlet, 23
... Normally open outlet, 24... Normally closed outlet, 25... Return passage, 26... Oil tank, 27... Valve body, 28... First spring, 29... Excitation coil, 30... Computer, 31... Piston, 33... Rod, 34
...Second spring.

Claims (1)

[Scope of utility model registration request] A discharge port 42 of a mechanical oil pump 20 is mechanically connected to the engine and driven in conjunction with the rotation of the engine to discharge oil at a flow rate proportional to the rotation speed of the engine, to the inlet port 22 of the three-way solenoid valve 21. ; The normally open outlet 2 of the three-way solenoid valve 21
3, an oil supply passage to the engine; an oil return passage to the oil tank 26 to which the inlet 41 of the mechanical oil pump 20 is connected to the normally closed outlet 24 of the three-way solenoid valve 21; The computer 30 inputs and calculates engine operating parameter signals and outputs a signal, which is input to the excitation winding 29 of the three-way solenoid valve 21, and duty-controls the opening of the normally closed outlet 24. Excess oil discharged by the mechanical oil pump 20 is returned to the oil tank 26 via the return passage 25, and oil supply flow rate control for separate lubrication of a two-cycle engine supplies oil at a flow rate suitable for the operating condition to the engine. Device.