CN211144670U

CN211144670U - Oil pump driving device and vehicle

Info

Publication number: CN211144670U
Application number: CN201921808976.6U
Authority: CN
Inventors: 陈浩; 萨图格日乐; 李金鸽; 单龙江; 冯永超; 黄圣锦
Original assignee: Zhejiang Geely Holding Group Co Ltd; Hunan Luoyou Engine Parts Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Hunan Luoyou Engine Parts Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-07-31
Anticipated expiration: 2029-10-25

Abstract

The utility model provides an oil pump driving device, including camshaft, first cam and second cam, the camshaft runs through first cam and second cam, first cam and second cam all with camshaft synchronous motion, first cam includes at least two first work portions and at least two first transition portions, every first transition portion is used for playing the transition effect between two adjacent first work portions, the second cam includes at least two second work portions and at least two second transition portions, every second transition portion is used for playing the transition effect between two adjacent second work portions, the distance of second work portion to the camshaft axle center is the same with the distance of first transition portion to camshaft axle center; the utility model provides a pair of oil pump drive device can adjust the size of the drive power of output oil feed pump according to vehicle actual operating condition for when the vehicle operation is in the light load state, the drive power that the output size is fit for reduces drive power's waste, thereby improves fuel economy.

Description

Oil pump driving device and vehicle

Technical Field

The utility model relates to an engine field, in particular to oil pump drive arrangement and vehicle.

Background

Gasoline is the main fuel of traditional internal combustion engines, and is widely used in vehicles such as automobiles, motorcycles, yachts and the like. By 2020, the number of cars in use in China is expected to break through 3 hundred million cars, so that the contradiction between supply and demand, which causes shortage of petroleum resources, is increasingly acute. The fuel economy is improved, the accurate control of the fuel quantity is realized, the shortage of petroleum resources can be alleviated, the emission of harmful pollutants is reduced, the air environment quality is improved, and the fuel is a necessary choice for realizing sustainable healthy advance in the automobile industry in China.

As is well known, a direct injection gasoline engine adopts a gasoline high-pressure in-cylinder direct injection technology, and low-pressure fuel (4 bar-5.5 bar) is pressurized by a high-pressure oil pump and then is transmitted to an oil injector for injection combustion. The high-pressure oil pump is connected with the electronic control unit, and the electromagnetic control valve of the high-pressure oil pump is controlled to drive the needle valve to open and close the high-pressure oil pump through a control signal sent by the electronic control unit. In the prior art, the lift of a high-pressure oil pump of an engine is fixed, namely, the driving force applied to the primary oil pumping of the oil pump and the oil quantity of the primary oil pumping are constant. During the running process of the vehicle, the vehicle can be divided into five working conditions according to the working state of an engine of the vehicle, and the oil pumping frequency of an oil pump is required to be adjusted according to the actual load of the engine under each working condition. However, when the vehicle runs, the vehicle is mostly in a low-load operation condition, and in this operation state, the oil pumping frequency of the oil pump can be adjusted, but the oil pump of the oil pump for pumping oil once cannot be changed, and if the same oil pumping driving force is still provided for the oil pump, the supply and demand are larger, and the fuel economy is low.

To the above-mentioned defect that prior art exists, this application provides one kind can adjust oil pump drive arrangement and vehicle to oil pump drive power size, can be according to the size of the drive power of vehicle operation's demand real-time control output oil pump, especially the drive power that the output size is fit for under the low load running state, reduces the waste of supplying more than asking to improve fuel economy.

SUMMERY OF THE UTILITY MODEL

To the above problem of the prior art, an object of the present invention is to provide an oil pump driving device, including camshaft, first cam and second cam, the camshaft runs through first cam with the second cam, first cam with the second cam all can with camshaft synchronous motion, first cam includes at least two first work portions and two at least first transition portions, first transition portion is used for connecting adjacent two first work portions, the second cam includes two at least second work portions and two at least second transition portions, second transition portion is used for connecting adjacent two second work portions, the second work portion arrives the distance in camshaft axle center with first transition portion arrives the distance in camshaft axle center is the same.

Further, the first cam comprises three first working portions and three first transition portions, and the first working portions and the first transition portions are arranged at intervals.

Further, the second cam comprises three second working portions and three second transition portions, and the second working portions and the second transition portions are arranged at intervals.

Specifically, be equipped with the arch on the camshaft surface, first cam is equipped with first through-hole, the camshaft passes first through-hole, first through-hole inner wall is equipped with first recess, first recess with protruding cooperation makes first cam with the synchronous circumferential direction of camshaft.

Furthermore, the second cam is provided with a second through hole, the camshaft penetrates through the second through hole, a second groove is formed in the inner wall of the second through hole, and the second groove is matched with the protrusion to enable the second cam and the camshaft to rotate in the circumferential direction synchronously.

Preferably, the first cam further comprises a first limiting structure, the second cam further comprises a second limiting structure, the camshaft is provided with a first connecting structure and a second connecting structure, the first limiting structure is matched with the first connecting structure to enable the first cam and the camshaft to move axially synchronously, and the second limiting structure is matched with the second connecting structure to enable the second cam and the camshaft to move axially synchronously.

Preferably, a first driving mechanism is connected with the camshaft and used for driving the camshaft to rotate circumferentially.

Further, a second driving mechanism is connected with the camshaft and used for driving the camshaft to move in a reciprocating mode along the axis of the camshaft.

Specifically, the device further comprises a tappet, the other end of the tappet is driven by the first cam or the second cam, and the first cam or the second cam drives the tappet to move back and forth along the tappet axis.

The utility model discloses another aspect protects a vehicle, include the oil pump and as above-mentioned technical scheme an oil pump drive, the oil pump with oil pump drive's tappet is connected.

Because of the technical scheme, the utility model discloses following beneficial effect has:

the utility model provides a pair of oil pump drive arrangement can adjust the size of the drive power of output oil feed pump according to the actual demand of vehicle actual operation operating mode and vehicle for corresponding to the different running state of vehicle especially when the vehicle operation is in the light load state, the drive power that the output size is fit for reduces the waste that the drive power that provides is greater than the drive power that the actual demand caused, thereby improves fuel economy.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of an oil pump driving device according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the first cam and the second cam in the present invention;

fig. 3 is a side view of the first cam and the second cam on the side of the second cam.

In the figure: 10-first cam, 11-first working part, 12-first transition part, 20-second cam, 21-second working part, 22-second transition part, 23-second through hole, 231-second groove, 30-camshaft, 31-bulge, 40-tappet and 50-oil pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Example 1

With reference to fig. 1 to 3, the present embodiment provides an oil pump driving apparatus including: a camshaft 30, a first cam 10 and a second cam 20, wherein the camshaft 30 penetrates through the first cam 10 and the second cam 20, the first cam 10 and the second cam 20 both move synchronously with the camshaft 30, the first cam 10 comprises at least two first working parts 11 and at least two first transition parts 12, the first transition parts 12 are used for connecting two adjacent first working parts 11, the second cam 20 comprises at least two second working parts 21 and at least two second transition parts 22, the second transition parts 22 are used for connecting two adjacent second working parts 21, the distance from the second working parts 21 to the axial center of the camshaft 30 is the same as the distance from the first transition parts 12 to the axial center of the camshaft 30, as shown in fig. 3, the projection of the plane of the second cam 20 perpendicular to the axial center of the camshaft 30 on the plane of the first cam 10 perpendicular to the axial center of the camshaft 30, at least one point of the edge of the second working portion 21 overlaps with the edge of the first transition portion 12.

Preferably, the position of minimum lift of the first cam 10 coincides with the position of maximum lift of the second cam 20; and the magnitude relation of the driving force lift provided by the first cam 10 and the second cam 20 is as follows: the driving force stroke provided by the first working part 11 is larger than that provided by the first transition part 12; the driving force stroke provided by the second working part 21 is larger than that provided by the second transition part 22; the driving stroke provided by the first transition part 12 is the same as the driving stroke provided by the second working part 21; in the embodiment of the present specification, the driving force stroke provided by the oil pump driving device to the oil pump is related to: the first working part 11> the first transition part 12 > the second working part 21> the second transition part 22.

Preferably, in the embodiment of the present specification, the first cam 10 includes three first working portions 11 and three first transition portions 12, and the first working portions 11 and the first transition portions 12 are arranged at intervals; each first transition portion 12 is used for performing a transition function between two adjacent first working portions 12, preferably, the distance between two adjacent first working portions 11 is equal, and the first working portions 11 are uniformly distributed on the first cam 10.

The second cam 20 comprises three second working parts 21 and three second transition parts 22, and the second working parts 21 and the second transition parts 22 are arranged at intervals; each of the second transition portions 22 is used for performing a transition function between two adjacent second working portions 21, and the second working portions 21 are uniformly arranged on the second cam 20.

A protrusion 31 is arranged on the outer surface of the cam shaft 30, the first cam 10 is provided with a first through hole, the cam shaft 30 penetrates through the first through hole, a first groove is arranged on the inner wall of the first through hole, and the first groove is matched with the protrusion 31 to enable the first cam 10 and the cam shaft 30 to synchronously rotate in the circumferential direction; i.e. the first recess can engage with the projection 31.

The second cam 20 is provided with a second through hole 23, the camshaft 30 penetrates through the second through hole 23, a second groove 231 is formed in the inner wall of the second through hole 23, and the second groove 231 is matched with the protrusion 31 so that the second cam 20 and the camshaft 30 synchronously rotate in the circumferential direction; that is, the second groove 231 can be engaged with the projection 31 so that the first cam 10 and the second cam 20 are each rotated in the circumferential direction in synchronization with the camshaft 30.

In the embodiment of the present disclosure, the camshaft 30 is provided with two protrusions, the two protrusions are symmetrically disposed on the outer surface of the camshaft 30, and the disposing direction of the protrusion 31 is consistent with the axial direction of the camshaft 30, but the protrusion 31 may be disposed in other manners besides the disposing manner provided in this embodiment.

The first cam 10 further comprises a first limiting structure, the second cam 20 further comprises a second limiting structure, the cam shaft 30 is provided with a first connecting structure and a second connecting structure, the first limiting structure and the first connecting structure are matched to enable the first cam 10 and the cam shaft 30 to move axially synchronously, and the second limiting structure and the second connecting structure are matched to enable the second cam 20 and the cam shaft 30 to move axially synchronously.

The camshaft 30 is connected with a first driving device for driving the camshaft to rotate circumferentially and a second driving device for driving the camshaft to reciprocate along the axial direction of the camshaft.

In the embodiment of the present disclosure, the device further includes a tappet 40, one end of the tappet 40 is connected to an oil pump, and the other end of the tappet 40 is driven by the first cam 10 or the second cam 20, and the tappet 40 reciprocates along the axis of the tappet 40 under the driving of the first cam 10 or the second cam 20.

The first cam 10 is further connected with a first position sensor, the second cam 20 is connected with a second position sensor, and the first position sensor and the second position sensor are respectively used for detecting the position information of the first cam 10 and the second cam 20; the device is also connected with an electronic control unit, and the electronic control unit is used for receiving the acquired position information of the first position sensor and the second position sensor.

The electronic control unit can judge which specific working condition of the current vehicle under five running working conditions according to the received information such as accelerator opening information, vehicle speed information and the like, and when the current vehicle is judged to be in a heavy-load working state, the electronic control unit controls the first driving device to enable the first cam 10 and the camshaft 30 to synchronously rotate in the circumferential direction and enable the first cam 10 to provide driving force for the oil pump;

when the electronic control unit judges that the vehicle running state is changed from a large load state to a small load running state, the electronic control unit controls the first driving motor to continue rotating, and position information of the first cam 10 and the second cam 20 is acquired through the first position sensor and the second position sensor. When any one of the transition portions 12 of the first cam 10 rotates to a position abutting against the tappet 40 due to the fact that the minimum lift position of the first cam 10 is consistent with the position of the maximum lift of the second cam 20, the second driving device is controlled to drive the camshaft 30 to move along the axis of the camshaft 30, so that the second working portion 21 of the second cam 20 translates to a position connected with the tappet 40, and further, the second cam 20 continues to rotate under the driving of the first driving device to provide driving force for the oil pump;

similarly, when the electronic control unit judges that the driving force required by the oil pump 50 needs to be increased currently through the received information, the electronic control unit controls the first driving motor to rotationally drive the second cam 20 to provide the driving force for the oil pump; when any one of the second working portions 21 of the second cam 20 reaches a position abutting against the tappet 40, the second driving device is controlled to drive the camshaft 30 to axially move, so that the first transition portion 12 of the first cam 10 is connected with the tappet 40 and continues to rotate, and the first cam 10 provides driving force for the oil pump 50.

In the present specification, in the embodiment, one side surface of the first cam 10 is closely attached to one side surface of the second cam 20, so that the first cam 10 and the second cam 20 can smoothly transit at one end of the tappet 40 under the driving of the second driving device; of course, a gap may also be left between the first cam 10 and the second cam 20, but the size of the gap should be smaller than the size of the connection position of the tappet 40 and the end connected with the first cam 10 or the second cam 20, so that when the camshaft 30 reciprocates along the axis of the camshaft 30, the switching between the first cam 10 and the second cam 20 is not interrupted due to the gap, and the driving force output to the oil pump is maintained.

Example 2

With reference to fig. 1 and fig. 2, the embodiment of the present disclosure provides a vehicle, which includes an oil pump 50 and an oil pump driving device provided in the foregoing technical solution, where the oil pump 50 is connected to a tappet 40 of the oil pump driving device.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention, as will be apparent to those skilled in the art, the invention is not limited to the details of the foregoing exemplary embodiment, but rather is embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. An oil pump driving device, characterized by comprising a camshaft (30), a first cam (10) and a second cam (20), wherein the camshaft (30) penetrates through the first cam (10) and the second cam (20), the first cam (10) and the second cam (20) move synchronously with the camshaft (30), the first cam (10) comprises at least two first working parts (11) and at least two first transition parts (12), the first transition parts (12) are used for connecting the adjacent two first working parts (11), the second cam (20) comprises at least two second working parts (21) and at least two second transition parts (22), the second transition parts (22) are used for connecting the adjacent two second working parts (21), and the distance from the second working parts (21) to the axis center of the camshaft (30) is the same as the distance from the first transition parts (12) to the camshaft (30) .

2. An oil pump driving device according to claim 1, characterized in that the first cam (10) includes three first working portions (11) and three first transition portions (12), and the first working portions (11) and the first transition portions (12) are provided at intervals.

3. The oil pump driving device according to claim 1, wherein the second cam (20) includes three second working portions (21) and three second transition portions (22), and the second working portions (21) and the second transition portions (22) are provided at intervals.

4. An oil pump driving device according to claim 1, wherein a protrusion (31) is provided on an outer surface of the cam shaft (30), the first cam (10) is provided with a first through hole, the cam shaft (30) passes through the first through hole, and a first groove is provided on an inner wall of the first through hole, and the first groove and the protrusion (31) are matched to enable the first cam (10) and the cam shaft (30) to synchronously rotate circumferentially.

5. An oil pump driving device according to claim 4, wherein said second cam (20) is provided with a second through hole (23), said cam shaft (30) passes through said second through hole (23), an inner wall of said second through hole (23) is provided with a second groove (231), said second groove (231) cooperates with said projection (31) to cause said second cam (20) to rotate circumferentially in synchronization with said cam shaft (30).

6. An oil pump drive arrangement as claimed in claim 4 or 5, characterized in that the first cam (10) further comprises a first stop structure and the second cam (20) further comprises a second stop structure, the camshaft (30) being provided with a first connection structure and a second connection structure, the first stop structure cooperating with the first connection structure such that the first cam (10) and the camshaft (30) move axially in synchronism, and the second stop structure cooperating with the second connection structure such that the second cam (20) and the camshaft (30) move axially in synchronism.

7. An oil pump driving apparatus according to claim 1, wherein a first driving mechanism is connected to the camshaft (30), and the first driving mechanism is configured to drive the camshaft (30) to rotate circumferentially.

8. An oil pump driving apparatus according to claim 1, wherein a second driving mechanism is further connected to the camshaft (30) for driving the camshaft (30) to reciprocate along the axis of the camshaft (30).

9. The oil pump driving device according to claim 1, further comprising a tappet (40), wherein the first cam (10) or the second cam (20) drives the tappet (40) to reciprocate along an axis of the tappet (40).

10. A vehicle, characterized by comprising an oil pump (50) and an oil pump drive according to any one of claims 1 to 9, said oil pump (50) being connected to a tappet (40) of said oil pump drive.