CN104153839A - Method for self-inspection of continuously variable valve lift mechanism - Google Patents
Method for self-inspection of continuously variable valve lift mechanism Download PDFInfo
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- CN104153839A CN104153839A CN201410434029.0A CN201410434029A CN104153839A CN 104153839 A CN104153839 A CN 104153839A CN 201410434029 A CN201410434029 A CN 201410434029A CN 104153839 A CN104153839 A CN 104153839A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention relates to a method for self-inspection of a continuously variable valve lift mechanism. According to the method for self-inspection of the continuously variable valve lift mechanism, self-inspection is conducted on the maximum lift of a valve when an engine of an automobile is stopped, and whether the valve reaches the maximum lift or not is judged so that whether the valve lift mechanism is in a locked-rotor state can be detected; when the automobile is powered on again, an appropriate operation mode can be selected according to the judgment made when the engine of the automobile is stopped so that the engine can directly operate in the continuously variable valve lift mode or the engine can operate in the continuously variable valve lift mode according to previous operation parameters, and the engine is made to transition from a throttle valve control mode to the continuously variable valve lift mode; in this way, the state of the mechanism can be detected in time, overload of a mechanical control unit is avoided, success of self-inspection is guaranteed, and the function of the continuously variable valve lift mechanism is achieved.
Description
Technical field
The present invention relates to a kind of self checking method of car engine machine mechanism, relate in particular to a kind of self checking method of continuous variable valve lift mechanism.
Background technique
Fuel economy under engine section load is an important indicator of engine evaluated always, in prior art, developed the multiple means that contribute to promote engine section load fuel-economizing ability, continuously variable valve lift (CVVL) technology is outstanding person wherein.Pumping loss when continuously variable valve lift technology can effectively reduce sub load, and then improve fuel economy.Continuously variable valve lift technical body complexity, it relies on valve lift to control air input of engine by air, need to ensure very high lift control accuracy and air inlet measuring accuracy, to realize good Economy and Security, this is not only the investigation to mechanism's mechanical stability, is also that control system has been proposed to strict demand.
For realizing the lift control of preparing, at each engine system prestart that powers on, all need control unit of engine (ECU) once to check and record continuous variable valve lift mechanism, this is the self-inspection of continuous variable valve lift mechanism.The self-inspection of continuous variable valve lift mechanism requires, at prestart, valve lift is adjusted to maximum lift state, and record is carried out in its position, using the reference point as follow-up lift control thus, ensure lift control accurately.In reality, in the time of continuous variable valve lift mechanism self-inspection, need regulate from small to large valve lift by continuously variable valve lift control motor, in this process except overcoming the resistance of continuous variable valve lift mechanism self, also need to overcome the returning place force of valve spring, thereby the driving moment that can cause controlling motor is excessive, controls motor and stall problem easily occurs and cause mechanism's fail self-test.And existing continuous variable valve lift mechanism is after fail self-test, system will enter fault mode, and valve control also switches to the higher throttle control pattern of oil consumption, thereby can not well bring into play the using effect of continuous variable valve lift mechanism.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of self checking method of continuous variable valve lift mechanism, it is the state of feeler mechanism in time, prevents the overload of mechanism controls unit, to ensure self-inspection success, realize the function of continuous variable valve lift mechanism.
For achieving the above object, the self checking method of continuous variable valve lift mechanism of the present invention comprises the following steps:
(1) when automobile is shut down under continuously variable valve lift pattern,
A, ECU control valve and carry out maximum lift self-inspection, judge whether valve reaches maximum valve lift;
(2) when automobile powers on again,
If valve reaches maximum valve lift in a (1), ECU controls valve and carries out the verification of valve maximum lift, and motor adopts the starting of continuously variable valve lift pattern;
If valve does not reach maximum valve lift in b (1), ECU detects whether change of valve position,
If b1 valve position does not become, ECU uses the maximum valve lift value in continuously variable valve lift pattern in (1), and control engine adopts the starting of continuously variable valve lift pattern,
If the variation of b2 valve position, ECU controls valve and carries out maximum lift self-inspection, and judges whether to reach maximum valve lift,
If b21 reaches maximum valve lift, ECU control engine adopts the starting of continuously variable valve lift pattern,
If b22 does not reach maximum valve lift, ECU control engine adopts the starting of throttle control pattern, regulates valve to maximum valve lift, and switches to continuously variable valve lift pattern.
Adopt above-mentioned technological scheme; in the time that automobile is shut down under continuously variable valve lift pattern, valve maximum lift is carried out self-inspection and judged whether to reach maximum valve lift; the runnability of the continuous variable valve lift mechanism can shut down automobile time judges, and valve mechanism operation is ready when automobile is powered on again.In the time shutting down, valve self-inspection can reach maximum valve lift, shows, in valve mechanism, stall does not occur, and valve mechanism operation is smooth and easy, after motor powers on again, can once after maximum valve lift, start in verification.
And valve self-inspection does not reach maximum valve lift in the time shutting down; show that stall has occurred valve mechanism; in the time that powering on next time, automobile just need to detect valve situation; if valve position is not moving; show still stall of valve mechanism; but decision mechanism's location status does not change, now motor in the past maximum valve lift value when continuously variable valve lift mode operation start, thereby make engine control simply effective.If valve position change, shows that valve mechanism is in confused situation, now need again valve to be carried out to maximum lift self-inspection, to judge the concrete condition of valve mechanism.In this self-inspection, if valve can reach maximum valve lift, show that valve mechanism stall disappears, motor can start by self-detection result smoothly.And if valve does not reach maximum valve lift yet, show still stall of valve mechanism, now motor can be started by throttle control pattern, after running, stall can be eliminated, under throttle control pattern, make valve adjustments to maximum valve lift simultaneously, to realize the self-inspection of valve maximum valve lift, then just can be switched to continuously variable valve lift pattern by throttle control pattern.
By above-mentioned process of self-test, can detect in time the concrete state of air valve lift range mechanism, to adopt suitable operating mode according to the concrete condition of air valve lift range mechanism, thereby can prevent the overload of mechanism controls unit, ensure self-inspection success, and finally realized the function of continuous variable valve lift mechanism.
As the restriction to aforesaid way, before a step in the time that automobile is shut down, also comprise:
A0, ECU control valve and carry out self-inspection in minimum valve lift position.
Make valve carry out self-inspection in minimum valve lift position, can judge that can air valve lift range mechanism move within the scope of full lift on the one hand, also can revise for the judgment curves of valve position ECU on the other hand, to guarantee the correctness of ECU testing result.
As the restriction to aforesaid way, in a step in the time that automobile powers on again, ECU controls valve and is repositioned to starting lift location before engine start.The starting lift location that makes valve be repositioned to before engine start to have demarcated, the air inflow can ensure engine start time, also can accelerate air motion, thereby can improve the combustion case in cylinder.
As the restriction to aforesaid way, in the b21 step in the time that automobile powers on again, ECU controls valve and is repositioned to starting lift location before engine start.The starting lift location that makes valve be repositioned to before engine start to have demarcated, the air inflow can ensure engine start time, also can accelerate air motion, thereby can improve motor Economy, HC discharge and combustion stability.
As the restriction to aforesaid way, in the b22 step in the time that automobile powers on again, ECU control engine in the time that throttle opening and valve lift reach maximum value simultaneously switches to continuously variable valve lift pattern.Make motor carry out control mode switch simultaneously in the time that throttle opening and valve lift reach maximum value, can ensure the smooth-going switching of throttle control pattern and continuously variable valve lift pattern, avoid producing the abnormal problems such as the fluctuation of speed.
As the restriction to aforesaid way, this continuous variable valve lift mechanism comprises the valve that valve spring is installed, the rocking arm being connected with valve, and the lift controlling mechanism being connected with described rocking arm butt and be rotationally connected with the valve actuating mechanism on lift controlling mechanism, also comprise actuating motor that be in transmission connection with described lift controlling mechanism, valve lift is regulated under controlling at ECU, and be connected at lift range sensor that be electrically connected on lift controlling mechanism and with ECU, so that valve position is detected.Utilize actuating motor via lift controlling mechanism, valve lift to be controlled, it is simple in structure, be convenient to design and implement, and adopt lift range sensor valve position to be detected to the lift location that can detect in real time valve, prevent the error feedback of valve lift and avoid the faulty identification of stall.
As the restriction to aforesaid way, described lift controlling mechanism comprises the link arm that one end is connected with rocking arm butt, described valve actuating mechanism is rotationally connected with the middle part of link arm, be provided with via the eccentric body shaft on it and be set with described link arm the eccentric shaft being connected at the other end of link arm, drive end and the eccentric shaft of described actuating motor are in transmission connection, and described lift range sensor is connected at one end of eccentric shaft.Eccentric shaft can be subjected to displacement by ordering about the relative rocking arm of link arm via the eccentric body shaft that is set in link arm one end, change the abutment between link arm and rocking arm, and the adjusting of realization to valve lift, actuating motor and lift range sensor are located on eccentric shaft and are also made overall structure comparatively simple, are convenient to design and implement.
As the restriction to aforesaid way, in the b22 step in the time that automobile powers on again, ECU control actuating motor orders about valve and reaches maximum valve lift under little current status.Under throttle control pattern, make actuating motor order about valve under little current status and reach maximum valve lift, to realize the self-inspection of valve maximum lift after engine running, can avoid causing because loop current is excessive actuating motor or ECU to transship.
In sum, adopt technological scheme of the present invention, can detect in time the state of air valve lift range mechanism, prevent the overload of mechanism controls unit, ensured self-inspection success, realized the function of continuous variable valve lift mechanism.
Brief description of the drawings
Below in conjunction with the drawings and the specific embodiments, the present invention is done further to describe in detail:
Fig. 1 is the stereogram of the continuous variable valve lift mechanism of the embodiment of the present invention;
Fig. 2 is the front view of Fig. 1;
Fig. 3 is the structural representation of eccentric shaft;
Fig. 4 is the FB(flow block) of the self checking method of the embodiment of the present invention;
In figure: 1, valve; 2, valve spring; 3, rocking arm; 4, link arm; 5, eccentric shaft; 6, eccentric body shaft; 7, turbine; 8, jack shaft; 9, driven roller; 10, hydraulic tappet; 11, lift range sensor; 12, actuating motor; 13, connecting body.
Embodiment
The present embodiment relates to a kind of self checking method of continuous variable valve lift mechanism; it is for after automobile is shut down while again powering on; by control unit (ECU), valve lift is adjusted to maximum lift state; and record is carried out in its position; using the reference point as the lift control of follow-up continuously variable valve lift pattern thus, ensure lift control accurately.
A kind of example arrangement of the continuous variable valve lift mechanism in the present embodiment can be as shown in Fig. 1 to Fig. 3, it comprises valve 1, on valve 1, be arranged with the valve spring 2 of ordering about valve return, the end of valve 1 is connected with rocking arm 3, and valve 1 is connected in one end of rocking arm 3, the other end at rocking arm 3 is connected with hydraulic tappet 10, rotates and is provided with rocking arm roller at the middle part of rocking arm 3.Continuous variable valve lift mechanism in the present embodiment also comprises the lift controlling mechanism being connected with the rocking arm roller butt on rocking arm 3 and is rotationally connected with the valve actuating mechanism on lift controlling mechanism.
Lift controlling mechanism comprises the link arm 4 that its one end is connected with the rocking arm roller butt on rocking arm 3, the other end of link arm 4 is set with an eccentric shaft 5, and eccentric shaft 4 is provided with eccentric body shaft 6 in the suit place between itself and link arm 4, and eccentric shaft 4 is to be sleeved on link arm 4 via this eccentric body shaft 6.Eccentric shaft 5 can be arranged on motor associated components via bearing provided thereon, and be also provided with a turbine 7 in one end of eccentric shaft 5, also be connected with a lift range sensor 11 at eccentric shaft 5 with respect to the other end of turbine 7, the structure of eccentric shaft 5 can be by shown in Fig. 3, certainly lift range sensor 11 is except being divided into the situation at eccentric shaft 5 two ends with turbine 7, and it also can be located at turbine 7 same one end of eccentric shaft 5.
Lift range sensor 11 in the present embodiment, according to Hall transducer principle, can be measured the angle amounts of rotation of eccentric shaft 5.And being also provided with the actuating motor 12 being in transmission connection with turbine 7 in turbine 7 one end of eccentric shaft 5, the drive end of actuating motor 12 is connected with worm screw, to realize the stable transmission of power between turbine 7.It is upper that actuating motor 12 and lift range sensor 11 are also all electrically connected on control unit of engine (ECU), thereby can realize the effective control to continuous variable valve lift mechanism via ECU.In the present embodiment, be rotatably connected to jack shaft 8 at the middle part of link arm 4, valve actuating mechanism is rotatably connected on jack shaft 8.Valve actuating mechanism comprises the connecting body 13 being rotatedly connected with jack shaft 8, with respect to the other end of itself and jack shaft 8 connecting places, a driven roller 9 is installed at connecting body 13, driven roller 9 connects with not shown driving cam, thereby can, under the driving of driving cam, finally realize the switching motion of valve to ordering about of rocking arm roller via link arm 4.
In the present embodiment, the two ends at jack shaft 8 are also connected with for making link arm 4 rotate the connector element of installing in motor as shown in fig. 1.In the time need regulating valve lift, ECU controls actuating motor 12 and orders about eccentric shaft 5 via turbine 7 and rotate, under the effect of the eccentric body shaft 6 on eccentric shaft 5, link arm 4 is produced together with jack shaft 8 mobile, link arm 4 also changes with the abutment of the rocking arm roller of rocking arm 3, thereby realizes the lift variation of the valve 1 under being driven by rocking arm 3.Certainly in the present embodiment, continuous variable valve lift mechanism is except can be said structure, and it also can adopt other structural type with identical effect, and the adjusting of its valve lift also drives and realizes by the motor under ECU control.
The self checking method of the continuous variable valve lift mechanism of the present embodiment can be by shown in Fig. 4, it can be used for the self-inspection of above-mentioned continuous variable valve lift mechanism, certainly also can be used for adopting motor to drive, there is the continuous variable valve lift mechanism of identical effect with other that realize that valve lift regulates.Describe as an example of above-mentioned continuous variable valve lift mechanism example; this self checking method is included in automobile while shutting down under continuously variable valve lift pattern; ECU control actuating motor 12 orders about link arm 4 and moves; under the effect of driving cam; first make valve 1 carry out self-inspection in minimum valve lift position; even if also valve 1 moves to minimum valve lift place, and detect the amounts of rotation of valve 1 eccentric shaft 5 correspondences when this position via lift range sensor 11.Lift range sensor 11 can feed back to ECU with corresponding magnitude of voltage form by the amounts of rotation of eccentric shaft 5 correspondences, and ECU can converse the positional value of valve 1 and give record via relevant parameter default in it according to the feedback voltage of lift range sensor 11.
Carrying out after the position self-inspection of valve minimum lift, ECU orders about valve 1 by actuating motor 12 and is repositioned to maximum position place, even if also valve 1 moves to maximum valve lift direction, to carry out maximum lift self-inspection.In the process moving to maximum valve lift direction at valve 1, because actuating motor 12 need to overcome the resistance between the each several part such as lift controlling mechanism, rocking arm 3, valve 1 is opened the aligning torque that also will overcome valve spring 2 simultaneously, therefore the excessive stall phenomenon that produces of resisting moment that valve 1 is likely subject to because of actuating motor 12 and valve 1 to the movement of maximum valve lift direction, the now return terminal of valve 1 is also that the maximum position place that valve 1 is repositioned to not is maximum valve lift place.Certainly except producing the situation of stall, because of the position difference that camshaft is shut down, valve 1 and actuating motor 12 also may not can be subject to excessive resisting moment, thereby can make valve 1 be repositioned to maximum valve lift position.
In the time that automobile is shut down, valve 1 also can detect via lift range sensor 11 to the return at maximum position place.Valve 1 makes eccentric shaft 5 produce corresponding amounts of rotation to the return amount of maximum valve lift direction, lift range sensor 11 feeds back to ECU by the amounts of rotation of eccentric shaft 5 correspondences with the form of magnitude of voltage, ECU is according to parameter value default in it, can analyze to obtain the concrete condition of exhaust valve 1 return, in the time that the deviation between the predefined value of scaled value in ECU of the feedback voltage of lift range sensor 11 and ECU is greater than 10%, can think that valve 1 does not reach maximum valve lift place.For ease of analyzing, the corresponding detection magnitude of voltage of valve 1 return amount that can be by return time, lift range sensor 11 detects is referred to as U1, and ECU can judge valve 1 by U1 and whether be repositioned to maximum valve lift place, and can carry out record to U1 and judged result.
In the time of automobile again powering on after shutdown, the judged result while now needing to shut down according to automobile is selected suitable operating mode to motor.If judge that valve 1 is repositioned to maximum valve lift place while shutdown; show that stall phenomenon does not appear in mechanism; now the detected U1 of lift range sensor 11 represents the corresponding checkout value of maximum valve lift; ECU can carry out record as maximum valve lift value using corresponding this U1 scaled value; using the reference point as follow-up lift control, ensure the accurate of lift control.And if shut down time judge that valve 1 is not repositioned to maximum valve lift place; show that stall has appearred in mechanism; ECU can not determine according to the detected U1 of lift range sensor 11 reference point of follow-up lift control, now need under the control of ECU, reaffirm maximum valve lift.
In the time shutting down, judge that valve 1 is repositioned in the situation at maximum valve lift place, when automobile powers on again, ECU can be according to the detected U1 control engine of lift range sensor 11 with continuously variable valve lift mode operation.But in order to ensure the accuracy of mechanism operation, in the time that automobile powers on again, ECU can control actuating motor 12 and makes valve 1 again move to maximum valve lift to sentence and carry out verification.After verification, ECU can control valve 1 via actuating motor 12 and be repositioned to starting lift location, starting lift location can be demarcated according to the concrete structure of motor, it is preset in ECU, valve 1 starts the air inflow can ensure engine start time in starting lift location, also air motion can be accelerated, thereby the combustion case in cylinder can be improved.
In the time shutting down, judge that valve 1 is not repositioned in the situation at maximum valve lift place, in the time that automobile powers on again, due to ECU, can not to obtain maximum valve lift as a reference point, therefore motor can not start with continuously variable valve lift pattern.And shut down to the process again powering at automobile; because dead time is long or mechanical failure etc.; also likely there is the situation of valve 1 position change; the variation of valve 1 position can cause ECU to can not determine the concrete condition of valve 1; therefore the uncertainty for avoiding bringing because of valve 1 shift in position; need to reaffirm the position of valve 1, so that the execution of ECU subsequent control.The confirmation again of valve 1 position is also while being powered on according to automobile by lift range sensor 11, and the amounts of rotation of the corresponding eccentric shaft 5 of valve 1 physical location detects, and for ease of subsequent descriptions, the magnitude of voltage that now lift range sensor 11 feeds back to ECU is referred to as U2.
If the valve that when U2 shuts down with automobile, lift range sensor 11 detects 1 final position corresponding feedback voltage value U1 equates; show the not change of the position of valve 1 in the time that automobile powers on again; now because mechanism's change of state is little; show that mechanism is comparatively stable; therefore ECU can use the maximum valve lift value recording in continuously variable valve lift mode operation above as a reference point and make motor with the starting of continuously variable valve lift pattern, and motor still can well operation under continuously variable valve lift pattern again in the case.
If U2 and U1 are unequal, show that shift in position has occurred valve 1 in the time that automobile powers on again, now ECU need to confirm the position of valve 1 again, i.e. ECU control actuating motor 12 moves valve 1 again to maximum valve lift direction, again to carry out the self-inspection of valve maximum lift.In this process of self-test, if valve 1 is movable to maximum valve lift place, show the elimination of stall phenomenon, the maximum valve lift value that now ECU can detect lift range sensor 11 is this moment as a reference point, and make motor with continuously variable valve lift mode operation, before engine start, for improving engine start situation, also make valve 1 be repositioned to starting via ECU and restart after lift location.
And again carry out in maximum lift process of self-test at valve 1, if valve 1 still can not move to maximum valve lift place, showing in mechanism still to have stall problem, motor also still can not start with continuously variable valve lift pattern.Now, for ensureing the normal use of automobile, also from the angle of eliminating machine stall, ECU control engine adopts the starting of throttle control pattern simultaneously.At motor, in throttle control mode operation, ECU can be according to the parameter preset in it, and continue provide a slightly little electric current to actuating motor 12, this electric current approximately can be 30% of actuating motor 12 maximum currents.Under engine operating state, between valve mechanism, can there is not again stall situation, therefore actuating motor 12 can make the continuous increase of the lift of valve 1 under this little current status, and finally reaches maximum valve lift, thereby has realized the maximum lift self-inspection of valve 1.
In the time that valve 1 reaches maximum valve lift position, corresponding magnitude of voltage is fed back to ECU by lift range sensor 11, and ECU can be with this maximum valve lift value as a reference, and make motor enter continuously variable valve lift pattern.And in the present embodiment in the time that motor can be switched to continuously variable valve lift pattern by throttle control pattern, for ensureing the smooth-going switching of motor between throttle control pattern and continuously variable valve lift pattern, avoid producing the abnormal problems such as the fluctuation of speed, ECU controls and makes motor in the time that throttle opening and valve 1 lift reach maximum value, carry out control mode switch simultaneously.
Claims (8)
1. a self checking method for continuous variable valve lift mechanism, is characterized in that the method comprises the following steps:
(1) when automobile is shut down under continuously variable valve lift pattern,
A, ECU control valve and carry out maximum lift self-inspection, judge whether valve reaches maximum valve lift;
(2) when automobile powers on again,
If valve reaches maximum valve lift in a (1), ECU controls valve and carries out the verification of valve maximum lift, and motor adopts the starting of continuously variable valve lift pattern;
If valve does not reach maximum valve lift in b (1), ECU detects whether change of valve position,
If b1 valve position does not become, ECU uses the maximum valve lift value in continuously variable valve lift pattern in (1), and control engine adopts the starting of continuously variable valve lift pattern,
If the variation of b2 valve position, ECU controls valve and carries out maximum lift self-inspection, and judges whether to reach maximum valve lift,
If b21 reaches maximum valve lift, ECU control engine adopts the starting of continuously variable valve lift pattern,
If b22 does not reach maximum valve lift, ECU control engine adopts the starting of throttle control pattern, regulates valve to maximum valve lift, switches to continuously variable valve lift pattern.
2. the self checking method of continuous variable valve lift mechanism according to claim 1, is characterized in that also comprising before a step in the time that automobile is shut down:
A0, ECU control valve and carry out self-inspection in minimum valve lift position.
3. the self checking method of continuous variable valve lift mechanism according to claim 1, is characterized in that: in a step in the time that automobile powers on again, ECU controls valve and is repositioned to starting lift location before engine start.
4. the self checking method of continuous variable valve lift mechanism according to claim 1, is characterized in that: in the b21 step in the time that automobile powers on again, ECU controls valve and is repositioned to starting lift location before engine start.
5. the self checking method of continuous variable valve lift mechanism according to claim 1, it is characterized in that: in the b22 step in the time that automobile powers on again, ECU control engine in the time that throttle opening and valve lift reach maximum value simultaneously switches to continuously variable valve lift pattern.
6. the self checking method of continuous variable valve lift mechanism according to claim 1, it is characterized in that: this continuous variable valve lift mechanism comprises the valve that valve spring is installed, the rocking arm being connected with valve, and the lift controlling mechanism being connected with described rocking arm butt and be rotationally connected with the valve actuating mechanism on lift controlling mechanism, also comprise with described lift controlling mechanism and being in transmission connection, with the actuating motor under controlling at ECU, valve lift being regulated, and be connected at and be electrically connected on lift controlling mechanism and with ECU, with the lift range sensor that valve position is detected.
7. the self checking method of continuous variable valve lift mechanism according to claim 6, it is characterized in that: described lift controlling mechanism comprises the link arm that one end is connected with rocking arm butt, described valve actuating mechanism is rotationally connected with the middle part of link arm, be provided with via the eccentric body shaft on it and be set with described link arm the eccentric shaft being connected at the other end of link arm, drive end and the eccentric shaft of described actuating motor are in transmission connection, and described lift range sensor is connected at one end of eccentric shaft.
8. the self checking method of continuous variable valve lift mechanism according to claim 6, is characterized in that: in the b22 step in the time that automobile powers on again, ECU control actuating motor orders about valve and reaches maximum valve lift under little current status.
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| CN109030006A (en) * | 2017-06-09 | 2018-12-18 | 长城汽车股份有限公司 | The detection method and system of continuous variable valve lift mechanism |
| CN108223039B (en) * | 2017-06-09 | 2019-11-01 | 长城汽车股份有限公司 | Control method, system and the vehicle of continuous variable valve lift mechanism |
| CN108561231B (en) * | 2017-06-09 | 2020-09-04 | 长城汽车股份有限公司 | Control strategy for continuously variable valve lift mechanism |
| CN109030006B (en) * | 2017-06-09 | 2021-03-19 | 长城汽车股份有限公司 | Detection method and system of continuous variable valve lift mechanism |
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| CN104153839B (en) | 2017-01-11 |
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