KR101189324B1 - Oil flux circuit for oil pump in vehicle - Google Patents

Abstract

The present invention relates to an oil flow circuit of an oil pump for a vehicle, wherein the engine is sufficiently operated so that the oil flow circuit formed by the oil pump for supplying the oil toward the engine is reduced in viscosity of the oil (engine temperature is about 80 °). Gap between the inner and outer rotors as the pumped oil adds energy toward the rotating rotor in the oil pump to reduce the relative difference in rotation between the inner and outer rotors when operating in idle mode. Without the structure to reduce the operating speed and minimize the relative movement speed can be characterized by reducing the operating noise and vibration.

Description

Oil flux circuit for oil pump in vehicle

1 is a block diagram of an oil flow circuit of a vehicle oil pump according to the present invention

2 is an operating state diagram of the oil flow circuit according to the present invention;

    <Description of the symbols for the main parts of the drawings>

1 rotor assembly 2 rotor unit

3: outer rotor coupling housing

3a: lattice forming stage 4: outer rotor housing

4a: flow path exposure opening channel

5: main euro

6: engine supply flow path 7: main bypass flow path

8: bypass valve 9: auxiliary bypass flow path

10: one-way valve 11: valve body

12 chamber 13 spool

14: spring 15: discharge hole

The present invention relates to a vehicle oil pump, and more particularly to an oil flow circuit of a vehicle oil pump.

In general, the engine oil pump of a vehicle lubricates by supplying oil in an oil pan, which is a container in which oil is stored, to the frictional movement of the engine in order to smoothly operate the engine.

Such an oil pump typically delivers oil by pumping motion between an inner rotor and an outer rotor having a gap therebetween, and according to this structure, a rotation generated in the crankshaft by combustion combustion force. By vibrating the inner and outer rotor relative motion, that is, the inner rotor is rotated in conjunction with the crankshaft, while the outer rotor is driven while following the movement of the inner rotor.

However, in this type of oil pump, when the inner rotor accelerates, the outer rotor is driven in the acceleration direction, but when the inner rotor decelerates, the outer rotor continues to run by inertia. As a result, the relative motion difference has a difference in relative motion, and when the decelerated inner rotor is accelerated again, the two rotors collide to generate noise and vibration. Particularly, the idle rotation of the engine is severe. In a state, it is generated remarkably.

Accordingly, the gap between the inner and outer rotor is minimized to minimize the relative movement speed, thereby reducing noise and vibration. However, the gap between the inner and outer rotors needs to be considered in terms of friction and wear, so it is limited to narrow the gap. There is no choice but to generate noise and vibration.

Accordingly, the present invention has been invented in view of the above, and when the engine is sufficiently operated to lower the viscosity of the oil, the pump is pumped when the inner rotor of the oil pump is accelerated again after deceleration in an idle state. The purpose is to reduce the noise and vibration as well as to reduce the frictional force by reducing the gap in the relative movement between the rotors.

The present invention for achieving the above object, the oil flow circuit of the vehicle oil pump is a rotor unit consisting of an outer rotor having a gap with the inner rotor is rotated and pumped while being coupled to each other to accommodate the rotor unit. A rotor assembly comprising an outer rotor coupling housing and an outer rotor housing each having a lattice forming end and a channel exposure opening channel for adding kinetic energy through the oil to be formed;

A main flow passage extending from an oil pan toward the engine to form a flow passage of oil pumped through the rotor assembly;

A main bypass flow passage having a bypass valve for discharging oil pressure above a predetermined pressure to prevent excessive pressure rise from the main flow passage from the main flow passage to the engine supply passage;

Branched from the main flow path through the rotor assembly to the oil pan, characterized in that the auxiliary bypass flow passage having a one-way valve to reduce the pressure loss by opening at the flow rate and hydraulic pressure generated during the idle (Idle).

Here, the channel exposure opening channel of the outer rotor housing is formed in a predetermined section, the grid forming end of the outer rotor coupling housing is characterized in that formed on the surface at equal intervals along the entire circumference.

The one-way valve includes a valve body to which a flow path is connected, a chamber through which oil passes, a spool that is elastically supported by a spring in the chamber to form a spool for opening and closing a chamber inlet, and an outlet of the chamber at equal intervals. It is characterized by consisting of a discharge hole.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a block diagram of the oil flow circuit of the vehicle oil pump according to the present invention, the oil flow circuit of the present invention is a rotor unit (2) rotated consisting of an outer rotor having a gap with the inner rotor, An outer rotor coupling housing having a lattice forming end 3a and a channel exposure opening channel 4a respectively configured to add kinetic energy through oil pumped while being coupled to each other to accommodate the rotor unit 2 ( A rotor assembly 1 composed of 3) and an outer rotor housing 4;

A main flow passage 5 extending from an oil pan toward the engine to form a flow passage of oil pumped through the rotor assembly 1;

A main bypass flow passage 7 having a bypass valve 8 for discharging oil pressure of a predetermined pressure or more so as to be connected to the engine supply flow passage 6 extending from the main flow passage 5 to the engine to prevent excessive pressure rise; ;

Auxiliary bypass with a one-way valve 10 branched from the main flow passage 5 to the oil pan via the rotor assembly 1 to reduce pressure loss by opening at the flow rate and hydraulic pressure generated during idle. It consists of the flow path 9.

Here, as the outer rotor coupling housing 3 and the outer rotor housing 4 constituting the rotor assembly 1 form a lattice forming end 3a and a channel exposure opening channel 4a in each, pumping is performed. Exposed to the oil to reduce the relative speed difference between the inner rotor and the outer rotor forming the rotor unit (2).

This is because when the outer rotor housing 4 surrounds the outer rotor coupling housing 3, the oil pumped through the flow path exposure opening channel 4a formed in the outer rotor housing 4 flows into the outer rotor housing 4. The oil is applied to the grid forming end 3a formed on the surface of the outer rotor coupling housing 3 accommodated inwardly of the outer rotor housing 4 while applying rotational force.

Here, the channel exposure opening channel 4a of the outer rotor housing 4 is formed in a predetermined section, and the grating forming ends 3a of the outer rotor coupling housing 3 are formed on the surface at equal intervals along the entire circumference. It is done.

The one-way valve 10 is provided in the auxiliary bypass flow passage 9 branched from the main flow passage 5 connected to the rotor assembly 1 and the engine supply flow passage 6 connected to the engine.

The one-way valve 10 is supported by a valve body 11 to which the flow path 9 is connected, a chamber 12 through which oil passes, and a spring 14 in the chamber 12. (12) It consists of the spool 13 which opens and closes an inlet, and the discharge hole 15 formed in many at equal intervals, forming the outlet of the said chamber 12. As shown in FIG.

In this case, the stiffness of the spring 14 is set to open when the oil flow rate pumped in the oil pump, that is, when a relatively low flow rate is formed in the idle region when the engine is idle. Lose.

Hereinafter, the operation of the present invention will be described in detail with reference to the accompanying drawings.

The oil flow circuit formed by the oil pump for supplying the oil toward the engine of the present invention is pumped when the idle mode is operated while the engine is sufficiently operated (engine temperature is about 80 °) to lower the viscosity of the oil. As the pumped oil adds energy toward the rotating rotor in the oil pump, reducing the relative difference in rotation between the inner and outer rotors, the relative motion without having a structure to reduce the gap between the inner and outer rotors By minimizing speed, there are features that can reduce operating noise and vibration.

As shown in FIG. 2, when the oil pump is driven, the oil flow using the oil pump pumps the oil of the oil pan while the rotor unit 2 of the rotor assembly 1 rotates, and thus the main flow path 5 When supplied to the engine through the, and the hydraulic pressure supplied through the main flow passage 5 is excessively increased, the pressure is reduced while being discharged through the main bypass flow passage 7 constituting the main flow passage (5). .

That is, when the hydraulic pressure supplied through the main flow passage 5 becomes higher than the setting, the hydraulic pressure acting on the bypass valve 8 side of the main bypass flow passage 7 connected to the engine supply passage 6 connected to the engine side. Through this, the bypass valve 8 is opened while the excessive pressure of the main flow passage 5 is released through the main bypass flow passage 7, which is made until the pressure of the main flow passage 5 is lowered to a set value You lose.

At this time, the auxiliary bypass flow path 9 branched from the main flow path 5 to the rotor assembly 1 is maintained in a closed state, which is a one-way valve 10 installed in the auxiliary bypass flow path 9. This is because in the operating region having a relatively faster flow rate and pressure than when the passage is in the idle region, it is kept closed.

In addition, when the engine is fully operated to reduce the viscosity of the oil in the idle operation area, that is, when the inner rotor of the oil pump is decelerated and accelerated again in the idle state, the rotor unit of the oil pump 2 Relative speed difference of) hardly occurs.

This is due to the action of the outer rotor coupling housing 3 and the outer rotor housing 4 accommodating the rotating rotor unit 2, that is, the pumped oil is driven by the oil pump. When supplied to the engine through), the hydraulic pressure acting on the main flow passage 5 forms a relatively low pressure and a low flow rate as compared to that in the normal operating region, so that the oil diverges from the main flow passage 5. It flows into the bypass flow path 9.

Accordingly, the one-way valve 10 installed in the auxiliary bypass flow path 9 is opened in an idle region having a relatively low flow rate, that is, the valve body 11 of the one-way valve 10 is opened. When the spool 13 is moved by the action of the provided spring 14, the spool 13 moves. The blocked passage is opened and returned to the rotor assembly 1 through the plurality of discharge holes 15 formed at equal intervals.

As such, when the pumped oil returns through the auxiliary bypass flow path 9, as shown in FIG. 2, the returned oil passes through the flow path exposure opening channel 4a formed in the outer rotor housing 4. The oil introduced into the outer rotor housing 4 and the oil introduced into the outer rotor housing 4 impinge on the lattice forming end 3a formed by the outer surface of the outer rotor coupling housing 3 located therein, thereby absorbing energy. Will be added.

That is, the outer rotor housing 4 and the outer rotor coupling housing 3 receive energy through the pumped oil, and thus the relative rotational speed between the inner rotor and the outer rotor forming the rotor unit 2 therein. Reduce the car.

As described above, when the inner rotor is decelerated, the rotor unit 2 that receives energy through the oil induces a deceleration movement of the inner rotor level which is decelerated by applying force to the outer rotor. The rotor on the side reduces the relative motion (speed) significantly while maintaining proper contact, reducing noise and vibration.

As described above, according to the present invention, the oil flow circuit formed by the oil pump for supplying oil toward the engine is idle when the engine is sufficiently operated (engine temperature is about 80 °) so that the oil viscosity becomes low. In the mode operation, the pumped oil adds energy toward the rotating rotor in the oil pump to reduce the relative difference in rotation between the inner and outer rotors, thereby reducing the gap between the inner and outer rotors. It has the effect of reducing the operating noise and vibration through minimizing the relative movement speed without having.

Claims (3)

A lattice forming stage for adding kinetic energy through a rotor unit 2 that is rotated by an outer rotor having a gap between the inner rotor and the oil pumped while being coupled to each other to receive the rotor unit 2. A rotor assembly (1) consisting of an outer rotor coupling housing (3) and an outer rotor housing (4) each of which formed a 3a and a flow path exposure opening channel 4a; A main flow passage 5 extending from an oil pan toward the engine to form a flow passage of oil pumped through the rotor assembly 1; A main bypass flow passage 7 having a bypass valve 8 for discharging oil pressure of a predetermined pressure or more so as to be connected to the engine supply flow passage 6 extending from the main flow passage 5 to the engine to prevent excessive pressure rise; ; Auxiliary bypass with a one-way valve 10 branched from the main flow passage 5 to the oil pan via the rotor assembly 1 to reduce pressure loss by opening at the flow rate and hydraulic pressure generated during idle. An oil flow circuit of an oil pump for a vehicle, comprising a flow path (9). 2. The flow path exposing opening channel 4a of the outer rotor housing 4 is formed in a predetermined section, and the lattice forming ends 3a of the outer rotor coupling housing 3 are equally spaced along the entire circumference. The oil flow circuit of the vehicle oil pump, characterized in that formed on the surface. The method of claim 1, wherein the one-way valve 10 is a valve body 11 to which the flow path 9 is connected, a chamber 12 through which oil passes, and a spring 14 in the chamber 12. An oil flow circuit of an oil pump for a vehicle, comprising a plurality of discharge holes 15 formed at equal intervals while being spooled and being supported to open and close the chamber 12.

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