CN210738634U - Camshaft phaser and car - Google Patents
Camshaft phaser and car Download PDFInfo
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- CN210738634U CN210738634U CN201921507675.XU CN201921507675U CN210738634U CN 210738634 U CN210738634 U CN 210738634U CN 201921507675 U CN201921507675 U CN 201921507675U CN 210738634 U CN210738634 U CN 210738634U
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Abstract
The application relates to a camshaft phaser and an automobile, which realize the utilization of engine oil return in the phaser so as to achieve the effect of reducing the consumption of an engine oil pump. The camshaft phaser includes: the motor comprises a stator and a rotor, wherein an advance adjusting cavity and a delay adjusting cavity are formed between the stator and the rotor; the rotor is provided with a lock pin hole; the lock pin hole is communicated with the advance adjusting cavity through a first oil way and is communicated with the retard adjusting cavity through a second oil way; the attachment bolt is internally provided with a valve hole communicated with the early adjusting cavity and the late adjusting cavity; an oil return path communicated with the lock pin hole and the valve hole is also arranged in the rotor; when the advance adjustment is carried out, after a part of return oil stored in the return oil way enters the lock pin hole, the part of return oil enters the advance adjustment cavity through a first one-way valve in the first oil way; when the hysteresis regulation is carried out, after a part of return oil stored in the return oil path enters the lock pin hole, the part of return oil enters the hysteresis regulation cavity through a second one-way valve in a second oil path.
Description
Technical Field
The utility model relates to an engine field specifically is a camshaft phaser and car.
Background
The variable cam phaser technology is characterized in that under specific engine working conditions, the advance and the delay of the opening angle of an intake valve and an exhaust valve are controlled, the size of the valve overlap angle is changed, the intake and exhaust flow and time are adjusted, the air intake quantity is increased, the air intake efficiency is improved, and therefore the improvement of the comprehensive performances of engine power, torque, emission, fuel economy, comfort and the like is achieved. The variable cam phaser in the current market mainly works by adopting oil pressure as a driving force, and has the main defect that the power consumption of an oil pump is increased due to the fact that the oil pressure needs to be higher; in order to improve the performance of the whole engine, the engine development needs to reduce the power consumption of an oil pump and reduce the capacity of an oil pump system, and the engine oil pressure is low under the conditions of low speed and high temperature, so that the response speed of a phaser is low, and even the target phase cannot be adjusted; in order to solve the problem of slow adjustment speed of the phaser, a phaser using camshaft torque, which has a higher cost and an electronic phase or a more complicated structure, is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a camshaft phaser and car realizes the effect that reduces the oil pump and consume in order to reach the utilization of the machine oil return in the phaser.
The technical scheme of the utility model is that:
the utility model provides a camshaft phaser, include:
the motor comprises a stator and a rotor coaxially arranged in the stator, wherein an advance adjusting cavity and a delay adjusting cavity are formed between the stator and the rotor;
a lock pin hole is formed in one blade of the rotor and is communicated with the early adjusting cavity through a first oil path, and the lock pin hole is communicated with the late adjusting cavity through a second oil path;
an attachment bolt partially passing through a rotor center hole of the rotor to engage with a camshaft, the attachment bolt having a valve hole provided therein communicating with the advance regulation chamber and the retard regulation chamber;
an oil return path communicated with the lock pin hole and the valve hole is also arranged in the rotor;
when the advance adjustment is carried out, after a part of return oil stored in the return oil path enters a lock pin hole, the part of return oil enters the advance adjustment cavity through a first one-way valve in the first oil path;
when the hysteresis regulation is carried out, after a part of return oil stored in the return oil path enters the lock pin hole, the part of return oil enters the hysteresis regulation cavity through a second one-way valve in the second oil path.
Preferably, the first oil passage and the second oil passage are located above the lock pin hole.
Preferably, the first and second one-way valves are: a ball check valve or a metal diaphragm check valve.
Preferably, another part of the return oil stored in the return oil path flows back to the oil tank through the return oil path.
Preferably, the locking pin hole includes:
the second lock pin hole of the first lock pin hole is communicated with the first lock pin hole, and engine oil entering the first lock pin hole and the second lock pin hole is isolated by the lock pin inserted into the first lock pin hole and the second lock pin hole in a sliding manner;
the first lock pin hole is communicated to the valve hole through an oil inlet oil way, and the second lock pin hole is communicated with the first oil way, the second oil way and the oil return oil way.
Preferably, the method further comprises the following steps:
a front cover body which is arranged at one end of the stator in a sealing way;
the rear cover body is arranged at the other end of the stator in a closed mode;
a lock pin seat arranged on the front cover body and opposite to the first lock pin hole;
the lock pin can be slidably arranged in the inner hole of the lock pin seat and the first lock pin hole, and a gap for fuel oil to pass through is formed between the hole wall of the first lock pin hole and the lock pin;
the locking pin spring seat is fixed on the rear cover body and partially extends into the second locking pin hole, and a gap for fuel oil to flow through is formed between the locking pin spring seat and the hole wall of the second locking pin hole;
the locking pin spring is partially sleeved on the locking pin spring seat, and the other part of the locking pin spring is embedded into an inner hole of the locking pin;
and after the engine oil in the valve hole flows into the first lock pin hole, the engine oil flows into the lock pin seat through a gap between the hole wall of the first lock pin hole and the lock pin, and pushes the lock pin to be separated from the lock pin seat.
According to the utility model discloses an on the other hand, the utility model also provides an automobile, including foretell camshaft phaser.
The utility model has the advantages that:
the utility model discloses utilize the undulant quick replenishment of machine oil to the phase place regulation grease chamber that realizes in the oil return oil circuit of phase place high frequency, drive machine oil is at first oil circuit, the second oil circuit, the oil return oil circuit, adjust chamber and hysteresis control intracavity circulation in advance, first check valve, the second check valve can play the effect that prevents the machine oil backward flow, supplementary inside oil circuit circulation, in time quick replenishment adjusts the machine oil of grease chamber, realize quick adjustment in whole engine speed within range, and reduce the machine oil consumption of machine oil pump, thereby reduce the machine oil pump system consumption, promote the engine performance. In conclusion, the invention has the advantages of exquisite process, simple structure, reliable performance, stable support, strong practicability and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
description of reference numerals: 1. a stator; 2. a rotor; 3. a lock pin spring seat; 4. adjusting an oil inlet channel of the cavity in advance; 5. a hysteresis regulation cavity oil inlet channel; 6. an oil return path; 7. adjusting the cavity in advance; 8. a hysteresis adjustment chamber; 9. a second lock pin hole; 10. a first oil passage; 11. a second oil passage; 12. a first check valve; 13. a second one-way valve; 14. a lock pin; 15. a detent spring; 16. a first lock pin hole; 17. a front cover body; 18. a lock pin seat.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1 and 2, the present invention provides a camshaft phaser, comprising:
a stator 1 and a rotor 2 coaxially arranged in the stator 1, wherein an advance regulation cavity 7 and a retard regulation cavity 8 are formed between the stator 1 and the rotor 2;
a lock pin hole is formed in one blade of the rotor 2, the lock pin hole is communicated with the advance adjusting cavity 7 through a first oil path 10, and the lock pin hole is communicated with the retard adjusting cavity 8 through a second oil path 11;
an attachment bolt partially passing through a central hole of the rotor 2 to engage with a camshaft, the attachment bolt being provided with a valve hole therein communicating with the advance regulation chamber 7 and the retard regulation chamber 8;
an oil return path 6 for communicating the lock pin hole and the valve hole is also arranged in the rotor 2;
when the advance regulation is carried out, after a part of return oil stored in the return oil path 6 enters a lock pin hole, the part of return oil enters the advance regulation cavity 7 through a first one-way valve 12 in the first oil path 10;
when the hysteresis adjustment is performed, a part of the oil stored in the oil return passage 6 enters the lock pin hole, and then enters the hysteresis adjustment chamber 8 through the second check valve 13 in the second oil passage 11.
The oil return stored in the oil return oil path 6 comes from the valve hole, after the engine is started, the valve hole continuously supplies oil to the oil return oil path 6, the oil return provided for the oil return oil path 6 comprises oil return which flows back to the valve hole from the early adjusting cavity 7 and the late adjusting cavity 8, and the oil return also comprises oil which is pumped into the valve hole by the oil pump. And the other part of return oil stored in the return oil way 6 flows back to the oil tank through an oil return channel.
The stator 1 is generally cylindrical and comprises a plurality of radial chambers defined by a plurality of lobes extending radially inwardly. In the illustrated embodiment, four lobes define four radial chambers, however, it should be understood that a different number of lobes may be provided to define radial chambers equal in number to the number of lobes. The stator 1 may also comprise a toothed pulley which is formed integrally with the stator 1 or otherwise fixed to the stator 1. The pulley is configured to be driven by a belt driven by a crankshaft of the internal combustion engine. Alternatively, the pulley may be a sprocket driven by a chain or any other known drive member for driving a camshaft phaser with a crankshaft.
The rotor 2 comprises a central hub having: a plurality of blades extending radially outward from the central hub; and a rotor central through bore extending axially through the central hub. The number of blades is equal to the number of radial chambers provided in the stator 1. The rotor 2 is coaxially arranged within the stator 1 such that each vane divides each radial chamber into an advance regulation chamber 7 and a retard regulation chamber 8. The radial ends of the lobes can mate with the central hub to separate the radial chambers from one another. The valve hole communicates with the advance regulation chamber 7 through the advance regulation chamber 7 oil passage and communicates with the retard regulation chamber 8 through the retard regulation chamber 8 oil passage.
The camshaft phaser in the scheme drives the phaser to work by means of energy generated by camshaft torque of an engine, the camshaft torque is generated by opening and closing of an engine valve, the phaser moves towards the advancing or retarding direction, and return oil stored in the oil return oil path 6 is partially transferred to the retarding regulation cavity 8 through the second oil path 11 or is partially transferred to the advancing regulation cavity 7 through the first oil path 10.
When the case of installation in the valve opening moved towards adjusting chamber 7 one side position in advance in the valve opening, machine oil in the valve opening entered into and adjusted chamber 7 in advance, and machine oil in the regulation chamber 8 of lagging then flows out to the valve opening in, and at this moment, the oil pressure in the regulation chamber 7 of advancing was greater than the oil pressure in the regulation chamber 8 of lagging, and the blade that leads to rotor 2 drives the camshaft rotation towards the direction of lagging under the effect of oil pressure, but because the undulant high frequency fluctuation about can making rotor 2's blade take place for the fluctuation of camshaft moment of torsion. When the vanes fluctuate in the lagging direction, the volume of the cavity in the advance adjusting cavity 7 is instantly increased, so that the volume in the advance adjusting cavity 7 is increased and the pressure is reduced to form vacuum instantly, at the moment, the first check valve 12 is opened due to the oil pressure difference, the engine oil in the oil return oil circuit 6 flows into the advance adjusting cavity 7, the engine oil is supplemented into the advance adjusting cavity 7, and the phase advance adjustment is accelerated.
When the case of installation in the valve opening moved towards 8 one side positions of lag adjustment chamber in the valve opening, machine oil in the valve opening entered into 8 in the lag adjustment chamber, and machine oil in 7 in the chamber of adjusting in advance then flowed out to the valve opening in, and at this moment, the oil pressure in 8 in the lag adjustment chamber was greater than the oil pressure in 7 in the lag adjustment chamber in advance, led to rotor 2's blade to drive the camshaft rotation towards the direction of advancing under the effect of oil pressure, but because the fluctuation of camshaft moment of torsion can make rotor 2's blade take place about high frequency fluctuation. When the vanes fluctuate in the advance direction, the volume of the cavity in the retard regulation cavity 8 is instantaneously increased, so that the volume in the retard regulation cavity 8 is increased and the pressure is instantaneously reduced to form vacuum, at the moment, the second check valve 13 is opened due to the oil pressure difference, and the engine oil in the oil return oil path 6 flows into the retard regulation cavity 8 to supplement the engine oil in the retard regulation cavity 8, so that the phase retard regulation is accelerated.
Because the oil return in the oil return oil way 6 is used for supplementing the engine oil for the advance adjusting cavity 7 or the lag adjusting cavity 8, the engine oil consumption of the engine oil pump can be correspondingly reduced, thereby reducing the power consumption of the engine oil pump and achieving the effect of improving the performance of the engine.
Wherein, as shown in fig. 2, the locking pin hole includes: a second lock pin hole 9 of the first lock pin hole 16 communicated with each other, wherein the engine oil entering into the first lock pin hole 16 and the second lock pin hole 9 is isolated by a lock pin 14 inserted into the first lock pin hole 16 and the second lock pin hole 9 in a sliding way; the first lock pin hole 16 is communicated to the valve hole through an oil inlet oil path, and the second lock pin hole 9 is communicated with the first oil path 10, the second oil path 11 and the oil return path 6.
The first oil passage 10 and the second oil passage 11 are located above the lock pin hole. In this way, the first and second oil passages 10, 11 do not interfere with the movement of the lock assembly of the phaser.
As shown in fig. 2, the phaser further comprises: a front cover 17 for closing one end of the rotor 2 and a rear cover for closing the other end of the device. The rear cover body is fixed to the axial end portion of the stator 1 near the camshaft with a cover bolt seal. Relative rotation between the rear cover body and the stator 1 is prevented by fastening the cover bolts. Similarly, the front cover body 17 is fixed to the axial end portion of the stator 1 opposite to the rear cover body with a cover bolt seal. A cover bolt passes through the rear cover and the stator 1 and is screw-engaged with the front cover 17, thereby sandwiching the stator 1 between the rear cover and the front cover 17 to prevent relative rotation between the stator 1, the rear cover, and the front cover 17. In this way, the advance regulation chamber 7 and the retard regulation chamber 8 are axially defined between the rear cover and the front cover 17.
The locking assembly is an assembly for locking or unlocking the relative rotation between the stator 1 and the rotor 2, and comprises: a lock pin 14, a lock pin seat 18, a lock pin spring 15 and a lock pin spring seat 3. The lock pin seat 18 is installed on the front cover body 27 of the phaser, the end surface of the lock pin seat 18 facing the first lock pin hole 16 is provided with a limit groove, the limit groove can be used for limiting the lock pin 14, and the limit groove of the lock pin 14 seat is arranged relative to the first lock pin hole 16; the lock pin spring seat 3 is fixed on the rear cover body and partially extends into the second lock pin hole 9, one part of the lock pin spring 15 is sleeved on the lock pin spring seat 3, and the other part of the lock pin spring 15 is embedded in an inner hole of the lock pin 14. Wherein a gap is provided between the lock pin 14 and the hole wall of the first lock pin hole 16, and a gap is provided between the lock pin spring seat 3 and the hole wall of the second lock pin hole 9. As shown in fig. 2, when the engine is stopped, the spool in the attachment bolt is in the initial position, and the lock pin 14 is restrained in the lock pin seat 18 by the return action of the lock pin spring 15, so that the relative rotation between the stator 1 and the rotor 2 is limited. After the engine is started, the oil in the valve hole enters the first lock pin hole and flows into the limiting groove of the lock pin 14 seat from the gap between the first lock pin hole and the lock pin 14, and the lock pin 14 is driven to compress the lock pin spring 15 and is separated from the lock pin 14 seat due to the action of the oil, so that the relative limitation between the stator 1 and the rotor 2 is released.
The first check valve 12 and the second check valve 13 have the same structure, specifically: a ball check valve or a metal diaphragm check valve. The two are fixed in the rotor 2 in a press-fitting, riveting or clamping groove mode and the like, and the metal diaphragm type one-way check valve is preferably selected to be fixed in the clamping groove mode, so that the structure is simpler in process and installation and lower in cost;
compared with the prior art, the utility model discloses utilize the undulant quick replenishment of machine oil to the phase place regulation grease chamber in the realization oil return oil circuit 6 of phase place high frequency, driving machine oil is at first oil circuit 10, second oil circuit 11, oil return oil circuit 6, adjust chamber 7 and the 8 inner circulations in hysteresis regulation chamber in advance, first check valve 12, second check valve 13 can play the effect that prevents the machine oil backward flow, supplementary inside oil circuit circulation, in time replenish the machine oil of regulation grease chamber fast, realize the quick adjustment in whole engine speed range, and reduce the machine oil consumption of machine oil pump, thereby reduce the machine oil pump system consumption, promote the engine performance. In conclusion, the invention has the advantages of exquisite process, simple structure, reliable performance, stable support, strong practicability and the like.
According to the utility model discloses an on the other hand, the utility model also provides an automobile, including foretell camshaft phaser.
While only some of the embodiments of the invention have been described in detail, those skilled in the art will appreciate that the invention can be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A camshaft phaser, comprising:
the motor comprises a stator and a rotor coaxially arranged in the stator, wherein an advance adjusting cavity and a delay adjusting cavity are formed between the stator and the rotor;
a lock pin hole is formed in one blade of the rotor and is communicated with the early adjusting cavity through a first oil path, and the lock pin hole is communicated with the late adjusting cavity through a second oil path;
an attachment bolt partially passing through a rotor center hole of the rotor to engage with a camshaft, the attachment bolt having a valve hole provided therein communicating with the advance regulation chamber and the retard regulation chamber;
an oil return path communicated with the lock pin hole and the valve hole is also arranged in the rotor;
when the advance adjustment is carried out, after a part of return oil stored in the return oil path enters a lock pin hole, the part of return oil enters the advance adjustment cavity through a first one-way valve in the first oil path;
when the hysteresis regulation is carried out, after a part of return oil stored in the return oil path enters the lock pin hole, the part of return oil enters the hysteresis regulation cavity through a second one-way valve in the second oil path.
2. The camshaft phaser of claim 1,
the first oil path and the second oil path are located above the lock pin hole.
3. The camshaft phaser of claim 1, wherein the first and second check valves are: a ball check valve or a metal diaphragm check valve.
4. The camshaft phaser of claim 1,
and the other part of return oil stored in the return oil way flows back to the oil tank through the return oil way.
5. The camshaft phaser of claim 1, wherein the lock pin bore comprises:
the second lock pin hole of the first lock pin hole is communicated with the first lock pin hole, and engine oil entering the first lock pin hole and the second lock pin hole is isolated by the lock pin inserted into the first lock pin hole and the second lock pin hole in a sliding manner;
the first lock pin hole is communicated to the valve hole through an oil inlet oil way, and the second lock pin hole is communicated with the first oil way, the second oil way and the oil return oil way.
6. The camshaft phaser of claim 5 further comprising:
a front cover body which is arranged at one end of the stator in a sealing way;
the rear cover body is arranged at the other end of the stator in a closed mode;
a lock pin seat arranged on the front cover body and opposite to the first lock pin hole;
the lock pin can be slidably arranged in the inner hole of the lock pin seat and the first lock pin hole, and a gap for fuel oil to pass through is formed between the hole wall of the first lock pin hole and the lock pin;
the locking pin spring seat is fixed on the rear cover body and partially extends into the second locking pin hole, and a gap for fuel oil to flow through is formed between the locking pin spring seat and the hole wall of the second locking pin hole;
the locking pin spring is partially sleeved on the locking pin spring seat, and the other part of the locking pin spring is embedded into an inner hole of the locking pin;
and after the engine oil in the valve hole flows into the first lock pin hole, the engine oil flows into the lock pin seat through a gap between the hole wall of the first lock pin hole and the lock pin, and pushes the lock pin to be separated from the lock pin seat.
7. An automobile comprising the camshaft phaser of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921507675.XU CN210738634U (en) | 2019-09-11 | 2019-09-11 | Camshaft phaser and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921507675.XU CN210738634U (en) | 2019-09-11 | 2019-09-11 | Camshaft phaser and car |
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| Publication Number | Publication Date |
|---|---|
| CN210738634U true CN210738634U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921507675.XU Active CN210738634U (en) | 2019-09-11 | 2019-09-11 | Camshaft phaser and car |
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| CN (1) | CN210738634U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983586A (en) * | 2021-02-01 | 2021-06-18 | 重庆长安汽车股份有限公司 | VVT (variable valve timing) system and camshaft phase adjusting method |
| WO2021254188A1 (en) * | 2020-06-15 | 2021-12-23 | 舍弗勒技术股份两合公司 | Camshaft phaser and vehicle |
| CN115213675A (en) * | 2022-08-16 | 2022-10-21 | 苏州高腾智能装备有限公司 | Adjusting method of lock pin clearance adjusting mechanism of camshaft phaser |
-
2019
- 2019-09-11 CN CN201921507675.XU patent/CN210738634U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021254188A1 (en) * | 2020-06-15 | 2021-12-23 | 舍弗勒技术股份两合公司 | Camshaft phaser and vehicle |
| CN112983586A (en) * | 2021-02-01 | 2021-06-18 | 重庆长安汽车股份有限公司 | VVT (variable valve timing) system and camshaft phase adjusting method |
| CN115213675A (en) * | 2022-08-16 | 2022-10-21 | 苏州高腾智能装备有限公司 | Adjusting method of lock pin clearance adjusting mechanism of camshaft phaser |
| CN115213675B (en) * | 2022-08-16 | 2024-03-08 | 苏州高腾智能装备有限公司 | Adjusting method of lock pin clearance adjusting mechanism of cam shaft phaser |
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