CN101956584A - Driving oil way of variable valve mechanism with VVT and VVL system - Google Patents

Abstract

The invention relates to a driving oil way of a variable valve mechanism with VVT and VVL system. The driving oil way comprises a VVT oil way, a cam shaft journal lubricating oil way, a hydraulic clearance adjuster oil way, a VVL system control oil way and one-way valves (6), wherein the VVT oil way is arranged in the middle of a cylinder cover; the cam shaft journal lubricating oil way is arranged on the two sides of the cylinder cover; the VVL system control oil way is integrated in the hydraulic clearance adjuster oil way; and a plurality of one-way valves (6) are arranged between a VVT oil way inlet (4) on the oil way of the cylinder cover and an engine oil control valve OCV (11) of the VVT system, and opened when the VVT system works normally and closed when an engine is stopped or idles.

Description

An oil passage having a variable valve mechanism driving the VVT ​​system and the VVL

FIELD

[0001] The present invention belongs to the technical field of engines and in particular relates to a variable valve mechanism having both VVT and VVL art driving circuit.

Background technique

[0002] With the auto industry, performance requirements of the engine, fuel consumption and emissions increasing, variable valve timing technology has become one of the key technologies to measure the Peugeot engine performance. The variable valve mechanism changes the traditional engine valve timing, valve lift fixed state, provide optimum valve timing, valve lift within a range of engine operating conditions, a better solution to the high speed and low speed, under a large load and a small load power and economy of contradictions, while improving the exhaust emissions.

[0003] The electromagnetic drive valve mechanism capable of valve lift and valve timing control any instantaneous, but only in the research stage, its cost, NVH, reliability and durability problems also need a long time to overcome. On the basis of the traditional cam-driven valve train on the development of hydraulically driven variable valve train has both VVT and VVL technology has become the focus of one of the major car manufacturers to overcome. Today, variable valve timing (Variable Valve Timing, VVT) technology has been widely used, but the variable valve lift (Variable Valve Lift, VVL) application technology is still quite limited. Two-step variable valve lift due respect to its implementation continuously variable valve lift is simple, making it a priority to develop and apply the manufacturers of the object, and a small amount of product has been granted production.

[0004] Along with the wide applications of DOHC, TYPE2 (HLA: a hydraulic lash adjuster + RFF: rocker roller finger) in the form of gas distribution mechanism due to its own advantages, being more and more used in high-end engine, and gradually become the mainstream. However, the two-step variable valve lift mechanism in the form of production is not yet approved products.

SUMMARY

Continuous [0005] The object of the present invention to provide a method of simultaneously driving oil passage having a variable valve mechanism and VVT VVL art, TYPE2 applied in the form of valve means, the hydraulic drive phase shifter to achieve valve timing variable, hydraulically driven two hydraulic lash adjuster or two roller rocker finger to achieve a two-step variable valve lift, thereby further improving engine performance, reduce fuel consumption, improve exhaust emissions.

[0006] To achieve the above object, the present invention employs the following technical solution: A simultaneously having a variable valve mechanism driving oil passage VVL technology and VVT, the oil enters the main oil passage of the cylinder head main oil gallery, the shunt WT oil, lubricating oil passage camshaft journal, hydraulic lash adjuster and the VVL control oil passage.

VVL the [0007] control line is integrated in the intake oil passage of the hydraulic actuator.

[0008] The cylinder main oil gallery is arranged on the intake side.

[0009] The VVT ​​according to a first oil passage into the camshaft bearing cap from the intermediate cylinder head, to achieve the simplest and shortest passage. VVT passage check valve is installed, its installation position is located between the inlet passage and the VVT ​​system, the OCV VVT, and the same number to the number of one-way valve phaser.

[0010] From the above technical solution, the present invention VVL control line integrated regulator has a hydraulic lash intake passage, the oil passage structure is simplified VVL systems. Meanwhile, the main oil gallery of the cylinder is disposed on the intake side, in line with the intake side of the oil consumption

Large claim 4, the length of shortened oil VVL control system and improve the speed and accuracy VVL control system.

[0011] VVT system oil into the camshaft bearing cap from the first intermediate cylinder head, the VVT ​​passage length is shortened, and reduced to an oil passage is increased. Pressure loss is reduced so that the system, in response to increase and optimize the performance of the VVT ​​system.

[0012] VVT check valve mounted between the inlet passage and the OCV VVT system, when the engine is idling or stopped, the check valve is closed, so that after passage of the check valve in the oil can remain in the oil path. Oil filling time and filling quantity of oil in the oil passage so as to shorten the time of the next job after the check valve. This will shorten the response time WT is down or idling after the first work, but also reduces the probability of hydraulic tappets abnormal sound occurs when the engine is started.

[0013] In particular the following technical solution:

[0014] A variable valve mechanism having a VVT and the oil passage VVL drive system, comprising a VVT oil, lubricating oil passage camshaft journal, a hydraulic lash adjuster oil, VVL control system oil passage and a check valve, the VVT ​​passage disposed in the middle of the cylinder head, the camshaft journal lubricating oil passage arranged on both sides of the cylinder head, the VVL control system integrated in the oil passage in the hydraulic lash adjuster, the check valve is a plurality of between the oil control valve OCV is mounted on the cylinder head and the oil passage VVT ​​VVT system inlet passage, which opens when the VVT ​​system to work, with the engine stopped or shut down idle.

[0015] Further, the lubricating oil passage includes camshaft journals camshaft journal oil supply passage and the exhaust camshaft journal oil supply passages, the camshaft journal oil supply passage and the exhaust camshaft axis neck oil supply passage is arranged at both sides of the cylinder head.

[0016] Further, the hydraulic lash adjuster oil passage comprises a hydraulic lash adjuster exhaust passage and an intake passage of the hydraulic lash adjuster, the VVL control system integrated adjuster passage in the intake passage of the hydraulic lash in.

[0017] Further, the lubricating oil passage connecting the camshaft journals hydraulic lash adjuster oil passage connected to the VVL control system which supply oil passage, the hydraulic lash adjuster oil passage, and its oil supply.

[0018] Further, the VVL control system comprises oil inlets and oil VVL control system VVL control valve system of non-zero CV oil, the oil control valve OCV of the VVL control system of the oil passage into the intake inlet of the hydraulic lash adjusting VVL system or an oil vent hole.

[0019] Furthermore, further comprising a cylinder main gallery, the main gallery of the cylinder head, the cylinder head main oil gallery is connected to its oil main gallery, the main oil gallery of the cylinder head are respectively connected to the intake camshaft journal oil supply passages, WT inlet passage, an exhaust camshaft journal oil supply passage.

[0020] Further, the intake camshaft journal oil supply passage connecting the exhaust passage and a hydraulic lash adjuster oil inlet VVL control system, the VVL control system is connected to an intake passage inlet of the hydraulic lash VVL oil or regulator vent hole system, VVL oil control valve OCV of the system VVL control system for controlling the flow of oil inlet.

[0021] Further, the oil control valve OCV of the VVL control system of the system VVL control flow passage inlet specifically is:

[0022] guarantee the intake passage hydraulic lash adjuster reaches normal operation of the hydraulic lash adjuster when the hydraulic pressure required VVL drainage system, the system does not reach VVL required for switching the hydraulic pressure;

[0023] When the OCV system VVL VVL control system controls the inlet of the oil passage into the intake passage regulator hydraulic lash, an intake passage in a hydraulic lash adjuster high pressure oil drives two hydraulic lash adjuster means two or shaped roller rocker arm movement switching device, switching from low lift to high lift;

[0024] When the OCV system VVL VVL control system controls the inlet of oil flowing into the oil drain hole VVL systems, hydraulic lash adjuster of the intake passage to maintain the pressure in the oil hydraulic lash adjuster only work, two hydraulic lash regulator or two fingers in the roller rocker switching means to the initial position, switching from a high lift to the low lift.

[0025] Furthermore, further comprising a phase shifter into the hole / spill port, the spill port phase shifter / intake VVT ​​hole and vent hole systems, VVT oil inlet through the one-way valve connected to the oil control valve is non-zero CV, the oil control valve OCV ligated into the hole by a phase shifter / spill port and the phaser oil return holes / hole into the circuit configuration, where working oil phase drive, and is connected to the VVT ​​system and the oil drain hole bottom shell.

[0026] Further, the cylinder head main oil gallery is arranged on the intake side.

[0027] Compared with the prior art At present, the present invention: oil into the cylinder head main oil passage from the main oil gallery, the shunt passage VVT, camshaft journal lubrication oil passage, the hydraulic lash adjuster and a passage VVL the control circuit. VVL control line integrated regulator has a hydraulic lash the intake passage, the oil passage structure is simplified VVL systems. Meanwhile, the main oil gallery of the cylinder is disposed on the intake side, in line with a large intake-side oil consumption requirements, the length of shortened oil VVL control system to improve the speed and accuracy of the VVL control system. VVT passage disposed in the middle of the cylinder head, camshaft and hydraulic tappets oil passage disposed at both sides of the cylinder head, to achieve the shortest and most VVT passage simplified.

[0028] The oil passage of the cylinder head is attached to two check valves, VVT reduced oil consumption of the engine start, thereby reducing the filling time of oil VVT work, it improves the response speed of the VVT ​​system. At the same time so that the oil can reach the hydraulic tappets faster, reducing the noise of the engine start.

BRIEF DESCRIPTION

[0029] FIG. 1 is a schematic view of an oil passage of the present invention; DETAILED DESCRIPTION

[0030] The following detailed description of the present invention based on the drawings, of a number of embodiments which preferred embodiments of the present invention.

Drive oil passage [0031] As shown in FIG 1, FIG. 2, having both a variable valve mechanism and VVT VVL art, the main oil gallery of the cylinder via the oil stream at a main oil gallery to the cylinder head 2, respectively, then flowing into the intake camshaft journal oil supply passages 5, VVT inlet passage 4, an exhaust camshaft journal oil supply passage 7. Oil intake camshaft journaled in the oil supply channel 5, the exhaust gas further flows into the hydraulic lash adjuster oil passage 12 to the inlet passage 13 VVL control system. VVT inlet passage 4 is arranged in the middle of the cylinder head, oil VVT-way valve 6 is installed, its installation position is located between an inlet passage 4 VVT and VVT system OCVl, and the phase number of the check valve 6 the same.

VVL system [0032] control the passage of oil at the inlet 13, the VVL control system 0CV14 which is flowing into the intake passage of the hydraulic lash adjuster 15 or the vent hole 16 flows into the VVL systems. VVL systems 0CV14 ensure an intake passage of the hydraulic lash adjuster 15 to achieve normal operation of the hydraulic lash adjuster when the hydraulic pressure required VVL drainage system, but the system does not reach the VVL required for switching the hydraulic pressure. When the system 0CV14 VVL VVL control system controls the inlet of oil at the oil passage 13 into the intake hydraulic lash adjusting the oil passage 15, the intake hydraulic lash adjuster high pressure oil passage 15 will drive two hydraulic lash adjuster or two stage switching roller finger means of the sub-rocker arm motion, thereby switching from a low lift to high lift; when the VVL control system 0CV14 VVL control system the inlet passage 13 into the oil at the VVL systems vent hole 16, into the gas hydraulic lash adjuster oil passage 15 of the hydraulic lash adjuster is maintained only work, two hydraulic lash adjuster or two fingers in the roller rocker switching means to the initial position, achieved from the high to drive the low lift switch.

[0033] The specific configuration of the present embodiment only 0CV14 internal passage for VVL control system embodiment does not involve two internal hydraulic lash adjuster or a specific configuration of the two roller rocker fingers, it does not involve VVL systems.

[0034] VVT said oil passage inlet 4, the check valve 6 into the annular OCVll VVT system via hole into, or back into the hole by the hole or the hole 8 and back into the hole 9 Composition the circuit operates drive phase, eventually into the vent hole 10, back to the sump.

[0035] In summary, the VVT ​​inlet passage 4 is arranged in the middle of the cylinder head, an intake camshaft journal oil supply passage 5 and the exhaust camshaft journal oil supply passage 7 are arranged on both sides of the cylinder head, the cylinder a cover main oil gallery is arranged on the intake side, an intake hydraulic lash adjuster and the exhaust passage 15 hydraulic lash adjuster oil passage 12 is connected to the intake camshaft journal oil supply channel 5, so that the passage is disposed more reasonable meet the needs of lubrication oil and adjusting the operating hydraulic lash each camshaft journal, while adjusting the oil passage control system is integrated VVL oil, VVL control system in an intake passage without requiring a separate hydraulic lash provided, it has been simplified, the VVL system responds quickly and accurately. VVT system, is optimized to obtain oil, the oil passage into the shortest distance becomes the minimum phase filter, oil. Thus speeding oil-filled speed phase shifter, the phase with respect to the inlet oil main gallery oil pressure with minimal pressure drop, improves the response speed of the phase shifter and the working stability. Thus, the engine smooth, performance, fuel consumption and emission theory easier to achieve objectives and requirements.

[0036] particularly when the engine is idling or stopped, the check valve 6 is closed, so that after the check valve in the oil passage 6 can be retained in the oil passage. Whereby the check valve and the filling time of oil filling quantity of oil in the oil passage 6 after the next work is shortened. VVT system with oil after optimization, shortening the response time after the first VVT shut down or idle work, but also reduces the probability of hydraulic tappets abnormal sound occurs when the engine is started.

[0037] The present embodiment is applied to a V-engine, the engine performance, fuel economy and emissions improvement effect is more obvious.

[0038] As a preferred embodiment of the present embodiment, the entire oil in the oil hole to be sealed using a sealing ball, easy to save costs and improve productivity. While not excluding the use of plugs or other sealing structure.

[0039] As a preferred embodiment of the present embodiment, for an engine timing chain drive, when using the ring between the cover and the VVT ​​system OCVll positive sealing the front cover.

[0040] As a preferred embodiment of the present embodiment, the one-way valve assembly 6 using interference VVT ​​loaded passage inlet oil passage on the cylinder head 4. Interference fit process is simple, efficient and reliable connection assembly.

[0041] Further, an oil passage having both driving the variable valve mechanism and VVT VVL technology, a cylinder having a main gallery, the main gallery of the cylinder head 2, the oil passage hole. 3 process, the inlet passage 4 VVT intake camshaft journal oil supply channel 5, the oil from the one-way valve 6, an exhaust camshaft journal oil supply passage 7, the phaser into the hole or the oil return hole 8, the spill port or intake phaser hole 9, VVT system vent hole 10, VVT system 0CV11, the exhaust gas passage hydraulic lash adjuster 12, VVL control system an inlet passage (13), VVL systems 0CV14, an intake passage of the hydraulic lash adjuster 15, VVL The system vent hole 16.

[0042] The oil via the main oil gallery of the cylinder 1 to the cylinder head main oil flow passage 2, then flows into the intake camshaft journal oil supply passages 5, VVT inlet passage 4, the exhaust camshaft journal oil oil channel 7.

[0043] The intake camshaft journal oil in the oil supply channel 5, the exhaust gas further flows into the hydraulic lash adjuster 13 inlet passage 12 and an oil passage VVL control system. VVL control system at the oil inlet passage 13, the VVL control system 0CV14 which flows into the intake passage of the hydraulic lash adjuster 15 or the vent hole 16 VVL systems.

[0044] VVT passage of oil into the inlet 4 by the check valve 6 into the annular hole OCVll VVT system, back into the hole, or hole 9 by the phase shifter composed or spill port into the hole 8 and the phase shifter the circuit operates drive phase, the final vent hole 10 flows into the VVT ​​system, back to the sump.

[0045] VVT inlet passage 4 is arranged in the middle of the cylinder head, VVT system OCVll mounted on the front face of the cylinder head.

[0046] The intake camshaft journal oil supply passage 5 is disposed at a main oil gallery from the cylinder block 1 close.

A check valve mounted 6 [0047] VVT oil passage in its installed position located between the inlet passage 4 and the VVT ​​VVT system OCVll.

[0048] The end surface of the oil feed system VVL 0CV14, control mode switching control.

[0049] The intermediate oil inlet side VVT ​​system OCVl 1, the control mode to PID control.

[0050] For sealing an engine timing chain drive, the use of seals between the VVT ​​system and the front cover OCVll timing.

[0051] The exhaust camshaft journal oil supply passage 7 are arranged in a more distant from the main oil gallery of the cylinder.

[0052] The intake and exhaust VVT passage are respectively mounted with a check valve 6, which is the same number with the number of phase shifter.

[0053] The one-way valve 6 and the VVT ​​inlet passage 4 is fixed using interference fit.

[0054] Process 3 The passage hole plugs or sealing ball.

[0055] The oil flow through the cylinder head main oil gallery to the main oil passage, and then flows into the intake passage oily camshaft journal oil supply passages, the VVT ​​inlet passage, an exhaust camshaft journals for. The intake camshaft journal oil supply oil hang further flows into the exhaust passage to a hydraulic lash adjuster oil inlet VVL control system. VVT inlet passage disposed in the middle of the cylinder head, oil VVT-way valve is installed, its installation position is located between the inlet passage and the VVT ​​VVT systems the OCV, a check valve and the same number to the number of phase shifter. VVL system control oil inlet of the oil passage, the OCV VVL control system which is flowing into the intake passage or the hydraulic lash adjuster flows into the vent hole VVL systems. VVL systems to ensure an intake OCV hydraulic lash adjuster oil hydraulic lash adjuster to reach normal operating oil pressure is required when the VVL drainage system, but the system does not reach the VVL required for switching the hydraulic pressure. When the OCV VVL control system VVL control system of oil flowing into the intake passage inlet of the hydraulic lash adjuster oil passage when the intake passage in the hydraulic lash adjuster high pressure oil will drive two hydraulic lash adjuster or two fingers movement of the rocker arm roller switching means, thereby switching from a low lift to high lift; OCV when the VVL control system VVL control system oil passage flows into the inlet of the vent hole when the VVL system, an intake hydraulic lash adjuster hydraulic oil in the hydraulic lash adjuster is maintained only work, two hydraulic lash adjuster or two fingers in the roller rocker switching means to the initial position, from a high lift to the low lift switch. VVT oil inlet of the oil passage, flows through the check valve into the OCV annular hole VVT ​​system, or through a loop formed by the spill port into the hole and back into the hole or the hole consisting of the drive working phase, eventually into vent hole, back to the oil pan.

[0056] The present embodiment is applied to form TYPE2 valve mechanism, the hydraulic drive is achieved by a phase shifter of a continuously variable valve timing, a hydraulic drive two hydraulic lash adjuster or two roller rocker finger to achieve a two-step variable valve lift, thereby further improving engine performance, reduce fuel consumption, improve exhaust emissions.

[0057] The oil passage in the cylinder head is attached to two check valves, the installation position is located between the inlet passage and the VVT ​​system, the OCV VVT, and the closer the distance VVT ​​system OCV. The check valve opens when VVT normal operation, but is closed when engine is stopped or idling. This time or to stop the engine idling, the VVT ​​oil passage located after the check valve in the oil passage and the oil remains in the oil chamber, thereby reducing the filling time of oil VVT next work to improve the VVT response speed. WT while reducing the oil consumption of the engine start, so that the oil can reach the hydraulic tappets faster, reducing the noise of the engine start.

Binding [0058] The above figures of the present invention has been exemplarily described, the present invention is embodied clearly not limited to the above embodiment, as long as the method employed spirit and aspect of the present invention that various modifications, without any modification or applied to other applications, and are within the scope of the present invention.

8

Claims (10)

1. The variable valve mechanism driving oil passage having a VVT system and VVL, wherein the passage comprises a VVT, the camshaft journal lubricating oil passage, the hydraulic lash adjuster oil, VVL control system oil passage and a check valve (6), is arranged in the middle of the oil passage VVT ​​cylinder head, said camshaft journal lubricating oil passage arranged on both sides of the cylinder head, the oil VVL control system integrated in the hydraulic oil in the regulator gap, the check valve (6) into a plurality of between the oil control valve OCV (11) attached to the cylinder head oil passage VVT ​​inlet passage (4) and the VVT ​​system, which is opened when the VVT ​​system to work, the engine is stopped off or idling.
2. 2. The variable valve mechanism driving oil passage and having VVL VVT system according to claim 1, wherein said lubricant passage includes camshaft journals camshaft journal oil supply passage (5), and an exhaust camshaft journal oil supply passage (7), the camshaft journal oil supply passage (5) and an exhaust camshaft journal oil supply passage (7) disposed on both sides of the cylinder head.
3. The driving oil passage having a variable valve mechanism and VVT VVL system of claim 1 or claim 2, wherein said hydraulic lash adjuster oil passage includes an exhaust passage of the hydraulic lash adjuster (12) and an intake passage of the hydraulic lash adjuster (15), the VVL control system integrated adjuster oil passage in the hydraulic intake gap (15).
4. The driving oil passage according to any one of the VVL and the VVT ​​system having a variable valve mechanism as claimed in claim, wherein said lubricating oil passage connecting the camshaft journals hydraulic lash adjuster oil, which oil and the hydraulic lash adjuster oil passage connecting the oil passage VVL control system, and its oil.
5. Variable valve mechanism driving oil passage and having VVL VVT system as claimed in any one of claims 1-4, characterized in that, the VVL control system comprises oil inlet passage VVL control system (13 oil) and the VVL control system valve 0CV (14), the non-zero CV VVL oil control valve system (14) controls the oil of the oil passage or the inlet regulator VVL vent hole into the intake system of the hydraulic lash.
6. 6. The drive as claimed oil passage having a variable valve mechanism and VVT VVL systems claimed in any one of the main oil gallery of the cylinder head, characterized in that, the main oil passage further comprises a cylinder (1), (2), the main oil gallery of the cylinder (1) connected to a cylinder head main oil passage (2) and which supply, said cylinder head main oil passage (2) are connected to the intake camshaft journal oil supply channel (5), VVT inlet passage (4), an exhaust camshaft journal oil supply passage (7).
7. 7. The variable valve mechanism driving oil passage and having VVL VVT system claimed in any one of the preceding claims, characterized in that the intake camshaft journal oil supply passage (5) hydraulic lash adjuster of the exhaust passage (12) and the inlet passage VVL control system (13), said inlet passage VVL control system (13) connected to an intake passage of the hydraulic lash adjuster (15) or system VVL vent hole (16), the oil control valve system VVL OCV (14) of the inlet passage VVL control system (13) controls the flow.
8. 8. The variable valve mechanism driving oil passage and having VVL VVT system according to claim 7, wherein said oil control valve 0CV VVL system (14) of the inlet passage VVL control system (13) flow control specifically is: to ensure the intake passage of the hydraulic lash adjuster (15) reaches a hydraulic lash adjuster of the hydraulic pressure required for normal operation of the system during drainage VVL, the system does not reach VVL required for switching the hydraulic pressure; when VVL system 0CV (14) VVL control system controls the inlet passage (13) at the oil flowing into the intake passage of the hydraulic lash adjuster (15), an intake passage of the hydraulic lash adjuster (15) is driven by two high-pressure oil stage hydraulic lash adjuster or two finger motion roller rocker arm switching device, switching from low lift to high lift; VVL system when the OCV (14) VVL control system controls the inlet passage (13) at the oil flows into the vent hole VVL system (16), an intake passage of the hydraulic lash adjuster (15) to maintain the oil pressure in a hydraulic lash adjuster only work, two hydraulic lash adjuster or two finger rollers roll arm switching device returns to the initial position, from a high lift to Lift switch.
9. 9. The drive as claimed in any one of the oil passage having a VVT VVL systems and variable valve mechanism as claimed in claim, characterized in that, further comprising a phase shifter into the hole / oil return hole (8), the phase an oil return hole / inlet hole (9) and the VVT ​​system vent hole (10), VVT inlet passage (4) connected to the oil control valve OCV (Il) through the one-way valve (6), said oil control valve OCV (Il) is connected by a phase shifter into the hole / spill port and the phaser oil return holes ⑶ / inlet hole (9) of the circuit configuration, where working oil phase drive, and is connected to the vent hole VVT ​​system (10) and the oil pan.
10. 10. The variable valve mechanism driving oil passage and having VVL VVT system 1-9 according to any one of the preceding claims, characterized in that the cylinder head main oil passage (1) is arranged on the intake side.