CN102628382A - Device for reducing power consumption of electronic control module and method thereof - Google Patents
Device for reducing power consumption of electronic control module and method thereof Download PDFInfo
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- CN102628382A CN102628382A CN2012100239174A CN201210023917A CN102628382A CN 102628382 A CN102628382 A CN 102628382A CN 2012100239174 A CN2012100239174 A CN 2012100239174A CN 201210023917 A CN201210023917 A CN 201210023917A CN 102628382 A CN102628382 A CN 102628382A
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Abstract
The invention discloses a device and method for reducing power consumption of an ECU (Electronic Control Module) (100). The ECU (100) controls an air intake valve (301) or an air discharge valve (302) of an explosive motor (300) through an electronic hydraulic pressure system (202, 203). When the temperature of the ECU (100) is too high, different current modes are adopted to control the air intake valve (301) and the air discharge valve (302), thereby reducing power consumption of the ECU (100).
Description
Technical field
The present invention relates to reduce the apparatus and method of the power consumpiton of the electronic control unit (ECU) in the explosive motor, said explosive motor comprises at least one cylinder and related at least one suction valve or the outlet valve that also activates through electro-hydraulic system with cylinder.Said electro-hydraulic system is controlled by solenoid valve, is used for activating changeably suction valve or outlet valve.In general, the present invention is applicable to the system of any kind of that utilizes solenoid valve control suction valve or outlet valve.
Background technique
Exist the gamut that is used in power operation to reduce different types of method of power consumpiton.Patent US 5611303 discloses a kind of like this method that is used for explosive motor.
Summary of the invention
Solenoid valve uses in the system that confirms that is used for controlling explosive motor air or fuel.These solenoid valves must be operated in each engine cycles.The endurance of its effect is depended on required air quality or fuel quantity.The power loss that causes occupies a big chunk of the power loss of electronic control unit, and possibly in some operating area, cause heat problem, needs extra effort to come chilling temperature.Be that according to the electronic control unit of independent technique scheme and the advantage of method offer the current-mode of solenoid valve through control, cpable of lowering power consumption reduces heat problem thus.
Elimination unnecessary power consumpiton in solenoid is improved valve performance and the operation lifetime that prolongs valve with saving power.
Power consumpiton is square proportional with electric current directly.Through reducing the levels of current in the solenoid valve, can significantly reduce power consumpiton.
In addition through controlling the lifting curve of suction valve or outlet valve, cpable of lowering power loss.The suction valve curve can change through regulating the electric hydaulic driving mechanism.Similar chamber conditions through in the cylinder of keeping explosive motor with the lifting curve of revising can realize the obvious reduction of power loss.
The power loss of practicing thrift can be used for the deciphering of controller, so that reduce one or more in the following parameter:
Can use littler shell dimension,
Can save temperature transducer,
Can make the cooling notion of controller simpler.
Description of drawings
Fig. 1 has shown the block diagram that comprises electronic control unit.
Fig. 2 has shown the electric current flow pattern in solenoid valve.
How Fig. 3 and Fig. 4 have shown can be in the embodiment of the situation decline low power consumption of the valve stroke that does not change suction valve or outlet valve.
How Fig. 5 has shown valve stroke that can be through revising suction valve or outlet valve to Fig. 8 but has kept the embodiment that fills with air identical in the cylinder reduces power consumpiton.
Embodiment
Fig. 1 has shown the block diagram that comprises electronic control unit (ECU) 100.ECU100 is connected with solenoid valve 200 through electrical signal line 101.ECU100 is connected with solenoid valve 201 through electrical signal line 102.Solenoid valve 200 is connected with the suction valve 301 of explosive motor 300 through electro-hydraulic system 202.Electro-hydraulic system 202 is used to control the suction valve 301 of explosive motor 300.Solenoid valve 201 is connected with outlet valve 302 through the electro-hydraulic system 203 of explosive motor 300.Electro-hydraulic system 302 is used to control the outlet valve of explosive motor 300.ECU100 has various inputs and various output.A plurality of sensors are connected to temperature and the engine characteristics of ECU100 to read ECU100, and for example oil is warm, engine speed, crankshaft angles etc.ECU100 has software function, and for example receiving element 106, heat management unit 107, solenoid valve control unit 108, thermal model unit etc.In shown in Figure 1 giving an example, only show the connection of a cylinder that is used for explosive motor.In multiple cylinder engine, must have a plurality of solenoid valves of corresponding a plurality of cylinders.
Solenoid valve 200,201 comprises coil, iron core, ingress port, outlet port and aperture.Iron core is used to open or close the aperture, flows to the outlet port to allow hydraulic fluid from ingress port.Said ingress port is connected to the high pressure fluid chamber of electro-hydraulic system 202,203, and said outlet port is connected to intermediate pressure chamber, and said intermediate pressure chamber is connected to the accumulator of electro-hydraulic system 202,203.Generally, iron core is opened the aperture, and allowing hydraulic fluid to flow out high pressure fluid chamber and to get into intermediate pressure chamber, the pressure in the high pressure fluid chamber will be not can not move and increases along with piston thus.Can iron core closed through applying electrical current to, the pressure in the high pressure fluid chamber will move and increase along with piston thus.Solenoid valve 200,201 is connected to ECU100.Solenoid valve 200,201 is " often opening " type.The solenoid valve of often opening kind makes iron core open when being de-energized when electric current is energized iron core being closed through applying.The opening and closing of solenoid valve 200,201 are through ECU100 control.
Fig. 2 has shown the current-mode I (unit is an ampere) of the opening and closing that are used for solenoid valve and the relation curve of time t (unit is a millisecond).The default situations of solenoid valve is for often opening, and this is presented at the S1 time period.Through applying electric current, solenoid valve cuts out, this is presented at the S2 time period.As shown in Figure 2, for shutoff solenoid valve, electric current is increased to level (step) I1 ampere in the t1 time period from 0 ampere, and it is the magnetizing solenoid valve in advance, but cut-off valve not.Magnetization phase is that magnetic field does not have enough power and comes cut-off valve in advance, but it shortens the shut-in time of valve.For solenoid valve cuts out, supply total current.Electric current further is increased to Peak current I2 in the t2 time period, closes iron core, keeps flow of hydraulic fluid from ingress port to the outlet port.At this current stage I2, coil magnetizes fully, and forms strong-electromagnetic field around the coil.This strong-electromagnetic field makes iron core close from its open position.In case iron core is closed, less electric current just is enough to iron core is remained on same position.Therefore, electric current is reduced to from Peak current and keeps electric current I 3, so that iron core is maintained in its closed position.Keep iron core to close in the t3 time period to keep electric current, iron core is opened.Solenoid valve is opened after time t3 once more, and this is presented at the S3 time period.
The power that consumes in the stage of utilizing Peak current to close iron core is than more at the power that keeps consuming during the electric current.In each engine cycles, activate solenoid valve 200,201,, be used to open or close suction valve 301 and outlet valve 302 to regulate electro-hydraulic system 202,203.Therefore the power that consumes among the ECU100 will be more.Suppose that explosive motor 300 comprises four cylinders that open and close four solenoid valves of suction valve and be used to open and close four solenoid valves controls of outlet valve by being used to; Consume for example X watt power if each solenoid valve activates at every turn, each engine cycles consumes 8 altogether and multiply by X watt power so.In addition, the acting duration of solenoid valve depends on air quality required in the cylinder of explosive motor 300 or fuel quantity.The power loss that causes occupies a big chunk of the power loss of ECU100, and possibly cause heat problem and need extra effort to cool off the temperature of ECU100 at some operating point.
Satisfying under the situation of predetermined condition, can reduce the power consumpiton of ECU100 through distinct methods.When the true temperature of ECU100 exceeds the predetermined maximum temperature of ECU100, satisfy predetermined condition.True temperature is the temperature of ECU100.Maximum temperature is predetermined temperature, when being higher than predetermined temperature, heat problem possibly take place, and ECU100 maybe be overheated with possibly damage.If the temperature of ECU100 is too high, so can be through a kind of power consumpiton that reduces ECU in the following method:
A) first method that is used to reduce power consumpiton comprises: utilize the different electric stream mode, make the lift of suction valve or outlet valve identical, but the energy that consumes is different.If temperature is low, use first current-mode so, and if temperature is high, use second current-mode so.Under first current-mode and second current-mode, the lift of suction valve or outlet valve is identical.
B) second method that is used to reduce power consumpiton comprises: utilize the different electric stream mode, make suction valve or exhaust valve lift different, but the fills with air in the cylinder is identical.If temperature is low, use the 3rd current-mode so, and if temperature is high, use the 4th current-mode so.Under the 3rd current-mode and the 4th current-mode, the lift of suction valve or outlet valve is different, but the fills with air in the cylinder is identical under the 3rd current-mode and the 4th current-mode.
Below Fig. 3 and Fig. 4 giving an example of the valve stroke that do not change suction valve or outlet valve through first method reduction power consumpiton will be described.
Fig. 3 has shown the relation curve of the current-mode I that is used to open and close solenoid valve 200 (unit is ampere) and time t (unit is millisecond).Have the normal running that the dotted line that activates A1 and A2 has shown explosive motor 300 under the low situation of the temperature of ECU100.During exhaust stroke, utilize the first current-mode A1 to activate solenoid valve 200, and during aspirating stroke, utilize the first current-mode A2 to activate solenoid valve 200.The solid line that has the second current-mode A3 has shown the operation of the explosive motor 300 that power consumpiton reduces.
In the normal running of explosive motor 300, activate solenoid valve 200, during the exhaust stroke of explosive motor 300 and aspirating stroke, to control the opening and closing of suction valve.Suction valve 301 is opened during exhaust stroke, to allow exhaust gas recirculatioon.As shown in Figure 3, electric current is applied on the coil of solenoid valve 200.Electric current is increased to a grade I1 ampere in the T1 time period from 0 ampere, and it is the magnetizing solenoid valve in advance, but solenoid valve cuts out.Magnetization phase is that magnetic field does not have enough power and comes shutoff solenoid valve in advance, but can shorten the shut-in time of solenoid valve.For solenoid valve cuts out, supply total current.Electric current is increased to Peak current I2 in the T2 time period.At this current stage I2, coil magnetizes fully, and forms strong-electromagnetic field around the coil.This strong-electromagnetic field makes iron core close from its open position.Iron core is closed the aperture, and pressure increases in the high pressure fluid chamber.In case iron core is closed, less current just is enough to iron core is remained on same position.Therefore electric current is reduced to from Peak current and keeps electric current I 3, so that iron core is maintained in its closed position.Through keeping electric current iron core is kept shut in the T3 time period, through reducing the electric current that gets into coil iron core is opened then.Because moving of cam, suction valve 301 is opened, and closes in the actuating A1 following short time of effect then.Through with the first current-mode A2 shutoff solenoid valve 200, suction valve 301 is opened once more in the aspirating stroke of explosive motor 300.After time T 4, activate solenoid valve 200 with the first current-mode A2.Electric current is applied on the coil of solenoid valve 200.Electric current is increased to a grade I1 ampere from 0 ampere once more in the T5 time period, further is increased to Peak current I2 in the T6 time period then.At this current stage I2, coil magnetizes fully, forms strong-electromagnetic field around the coil.This strong-electromagnetic field makes iron core close from its open position.Iron core is closed the aperture, boost pressure in the high pressure fluid chamber.In case iron core is closed, less current just is enough to iron core is remained on same position.Therefore electric current is reduced to from Peak current and keeps electric current I 3, so that iron core is maintained in its closed position.In the T7 time period, through keeping electric current iron core is kept shut, iron core is opened.Suction valve is followed moving of cam during aspirating stroke.During the T4 time period, cam does not move, and moving of suction valve do not change.So INO twice, once in exhaust stroke, once in aspirating stroke.Because activate solenoid valve, so the power consumpiton of ECU100 is big 200 twice.Activate each engine cycles that A1 and A2 occur in explosive motor.As observed from Fig. 3, power consumpiton is substantially during Peak current level I2.Because power is directly proportional with current squaring, so the power consumpiton of electronic control unit 100 is big.
If the true temperature of ECU100 exceeds maximum temperature, can under the situation of the lift that does not influence suction valve 301, reduce the power consumpiton of ECU100 so.In order to reduce power consumpiton, the current-mode of control solenoid valve 200 makes high-current pulse by the reduction of the second current-mode A3 replace the peak current pulse of a plurality of tight spacings of the first current-mode A1, A2.It means, only during exhaust stroke, activates solenoid valve 200 once with the second current-mode A3, and continues to close up to aspirating stroke, rather than open and close once more with the first current-mode A1 and A2.As shown in Figure 3, the second current-mode A3 is applied on the coil of solenoid valve 200.In the T1 time period, electric current is increased to a grade I1 ampere from 0 ampere, further is increased to Peak current I2 in the T2 time period then.At this current stage I2, coil magnetizes fully, forms strong-electromagnetic field around the coil.This strong-electromagnetic field makes iron core close from its open position.Iron core is closed the aperture, and pressure increases in the high pressure fluid chamber.In case iron core is closed, less current is enough to iron core is remained on same position.Therefore electric current is reduced to from Peak current and keeps electric current I 3, so that iron core is maintained in its closed position.During exhaust stroke, suction valve 301 opens and closes along with moving of cam.In the T8 time period, through keeping electric current iron core is kept shut, iron core is opened.Continue to activate solenoid valve once more in aspirating stroke, because cam moves, so suction valve is followed moving of cam.Through this actuation patterns A3, the Peak current of removing fully at time period T6 activates, so power consumpiton reduces.In the T4 time period, because cam does not move, so moving of suction valve do not change, therefore shutoff solenoid valve can not influence moving of suction valve during T4.Therefore, the lift that moves of the suction valve under actuation patterns A3 effect is similar with A2 with actuation patterns A1.Only shorter when two time T 4 that activate between A1 and the A2, when making power consumpiton among the time period T4 of current-mode A3 be less than the power consumpiton in the time period of current-mode A2 T6, this method is useful.
Fig. 4 shown first current-mode that suction valve or exhaust valve lift are identical and second current-mode another for example.Fig. 4 has shown the relation curve of the current-mode I that is used to measure the solenoid valve shut-in time (unit is ampere) and time t (unit is millisecond).Dotted line has shown the first current-mode C1 under the normal running.The solid line of the second current-mode C2 has shown the operation of the power consumpiton with reduction.Time point when the solenoid valve shut-in time contacts valve seat for the solenoid valve core body.Confirm that the solenoid valve shut-in time relates to measurement at the electric current in solenoidal driving stage with detect when the solenoid valve core body is taken a seat the variation inductance that produces thus.When its valve seat of solenoid valve core body contact, detect the distinct signal of the electric current that alternately descends and rise.Detect the solenoid valve shut-in time in each engine cycles under normal operation.The ECU100 monitoring activates the current-mode of solenoid valve.The real time point of thus suction valve or outlet valve being opened feeds back to ECU100.ECU100 utilizes this information adjusting solenoid valve shut-in time and the fault that detects solenoid valve in the engine cycles subsequently.Detect the solenoid valve shut-in time under normal operation, so that high-caliber Peak current is applied to solenoid valve, shown in the first current-mode C1 in the T9 time period.During this period, power consumpiton is big.In order to reduce the power consumpiton of ECU100, if the true temperature of ECU100 exceeds maximum temperature, the current-mode of solenoid valve 200 is given in control so, so that only in engine cycles at interval, detect the solenoid valve shut-in time.Reusable this solenoid valve shut-in time is detected information, and it can not change in the very short time period, saves power and apace electric current is reduced to a grade I3 (for example 5 amperes) at level I2 (for example 11 amperes) thus, shown in the second current-mode C2.
Following Fig. 5 to 8 has described second method that reduces power consumpiton through the lift that changes suction valve 301 or outlet valve 302.With suction valve 301 this example is described.Similarly, outlet valve 302 also can be by solenoid valve 201 controls.
Fig. 5 has shown the lift and corresponding current-mode of suction valve.Last figure has shown for the suction valve of first suction valve and second suction valve lift with respect to crankshaft angles.Figure below has shown the current-mode separately with respect to crankshaft angles for first solenoid valve and second solenoid valve.Two figure dotted line have shown normal running, and solid line has shown the operation of the modification of the power consumpiton with reduction.Last figure has shown the lift of suction valve, and its illustrated in detail is following.Figure below has shown current-mode E1 that is used for first solenoid valve and the current-mode E2 that is used for second solenoid valve.Solid line L3 has shown substituting operation among the last figure, and wherein only first suction valve demonstrates lift and second suction valve does not demonstrate lift.Accordingly, solid line E3 has only shown through current-mode and has activated first solenoid valve in figure below, and does not use current-mode to activate second solenoid valve.
Two figure have shown the crankshaft angles of explosive motor, and said explosive motor comprises at least two cylinders: first cylinder and second cylinder.Therefore two cylinder operations each other show among the figure that the operation of first suction valve is through the control of first solenoid valve with following, and the operation of second suction valve is through the control of second solenoid valve.
When explosive motor can be used at least one cylinder is switched under the serviceability of OFF operation, the lift of suction valve shown in Figure 5 and current-mode were useful.This means, or not therefore in this cylinder, do not burn to this cylinder supply air and fuel.In this way, can reduce the power of explosive motor and only with some cylinder operation.In the multi cylinder explosive motor, if some cylinders are switched to OFF, can operate explosive motor with the cylinder that reduces quantity so, the power output of explosive motor can be reduced thus, and burning can be reduced thus.Because this system allows with a cylinder operation,, therefore can reduce the power consumpiton of the ECU100 that is used for operating difference cylinder so can only operate explosive motor with the cylinder that reduces quantity.This can be used for reducing the power consumpiton among the ECU100.Therefore under some operator scheme of explosive motor, can some cylinder be switched to OFF, to reduce the power consumpiton of ECU100.
Last figure has shown the different lifts of the suction valve pattern that is used for first cylinder.Under normal operation, suction valve only promotes through the lift mode shown in the L1, and lift mode L3 has shown the lift with the suction valve of the power consumpiton operation that reduces.Can find out from last figure, the lift surmount L100 of the lift ratio pattern L1 of pattern L3, the amount of air of therefore introducing corresponding first cylinder is more much higher than normal running.This air quantity in this first cylinder is higher, also can in this cylinder, spray more fuel.Therefore, compare with normal running, the moment of torsion output of this first cylinder increases.The moment of torsion of first cylinder is exported to be increased, thereby compensation is because second cylinder is operated the moment of torsion of second cylinder minimizing that causes at all.Therefore explosive motor transmits identical moment of torsion output, although a cylinder operation is only arranged.Certainly, this generic operation is only effective during not with full load operation at cylinder, does not operate the loss of machine of torque that causes because first cylinder need compensate because of second cylinder.
Can find out from figure below, because cylinder operation only, so whole current-mode E2 does not need.Because it is longer that the lift of the suction valve of first cylinder need be operated, so the 3rd current-mode E1 changes into new the 4th substituting current-mode E3.In new the 4th substituting current-mode E3, keep electric current H1 to need time expand T100.But because of the power consumpiton that the maintenance electric current H1 of this prolongation causes more much lower than the power consumpiton that the 3rd current-mode E2 produces.Therefore a cylinder being switched to this kind operation strategy of moment of torsion that OFF and another compensation cylinder be switched to the cylinder of OFF is the very effective mode that reduces the power consumption of ECU100.
Fig. 6 has shown the lift of suction valve and the current-mode of solenoid valve.X axle representation unit in Fig. 6 is the crankshaft angles of degree, and Y axle representation unit is that the lift or the unit of the suction valve of millimeter is the electric current I of ampere.Dotted line FL1 has shown the lift of the 3rd current-mode E4 lower inlet valve when temperature is low.Solid line EC1 has shown the lift of the 4th current-mode E5 lower inlet valve of the power consumpiton with reduction.The figure dotted line has shown normal running, and solid line has shown the retouching operation of the power consumpiton with reduction.
Under normal operation, when temperature is low, activate solenoid valve through the 3rd current-mode E4, to open the full lift FL1 of suction valve.As shown in Figure 6, the 3rd current-mode E4 is increased to magnetizing current in advance from 0 ampere, is increased to Peak current P2 then so that solenoid valve cuts out.Then the 3rd current-mode E4 is reduced to maintenance electric current H2 so that solenoid valve is maintained in its closed position, makes suction valve follow whole the moving that cam moves.Solenoid valve closes to the lower dead center (BDC) that exceeds crankshaft angles.Position when lower dead center (BDC) reaches the position near bent axle for piston in the cylinder of explosive motor.Along with the mobile BDC that extends beyond crankshaft angles of cam, INO is to the BDC that exceeds crankshaft angles, up to angle Φ 1.Solenoid valve closes to and exceeds BDC to realize the valve standard-sized sheet.The complete lift of mobile suction valve fully with respect to cam is called full lift, shown in the FL1 between crankshaft angles Φ 4 and the Φ 1.
If the true temperature of ECU100 exceeds maximum temperature, can reduce the power consumpiton of ECU100.In order to reduce power consumpiton, be not to close suction valve, but the angle Φ 2 before the lower dead center BDC of crankshaft angles close suction valve symmetrically with angle Φ 1 at the angle Φ 1 of crankshaft angles, it has identical fills with air in cylinder.Angle Φ 2 and Φ 1 are symmetrical around BDC, make in this two angles lower piston position in cylinder identical.During the aspirating stroke of explosive motor, suction valve must be opened, so that let air/fuel mixture get into cylinder.Piston can not compressed mixture in principle, closes up to suction valve.At full lift FL1, suction valve stays open the compression stroke into explosive motor.Piston is moved down into BDC, and surpasses BDC with continuing to move into cylinder.If INO, so along with piston moves down, it sucks air, and along with it moves up above BDC, it releases air, thereby has effective mixture of minimizing.Not to close suction valve, but close suction valve at angle Φ 2 before the BDC, so the air of Expansion of Piston constant basis, to reduce pressure and pressurized air once more at angle Φ 1.No matter therefore close suction valve at Φ 2 or at Φ 1, the air quantity in the cylinder is identical.In order to close suction valve, before the angle Φ that closes suction valve 2,, stop to activate solenoid valve for example at angle Φ 3 at angle Φ 2.With respect to the crankshaft angles of closing suction valve in tradition/standing valve lifting curve, close suction valve at the degree of advance of engine crankshaft.This pattern becomes early admission valve " shut " mode".This shows through solid line EC1.The 4th current-mode E5 is increased to magnetizing current in advance from 0 ampere, is increased to Peak current P2 then with shutoff solenoid valve.The 4th current-mode E5 is reduced to then and keeps electric current H2 so that solenoid valve is maintained in its closed position, and makes suction valve move and move along with cam, stops the 4th current-mode E5 at angle Φ 3 then.At angle Φ 3, because buffer stage (ballistic flight phase), suction valve moves, and closes at angle Φ 2 then.Solenoid valve is activated by the 4th current-mode E5, and stops in Φ 3 actuatings.Therefore under the 4th current-mode E5, owing to the electric current H2 during the PW1 time period saves power.
Fig. 7 has shown the lift of suction valve and the current-mode of solenoid valve.X axle representation unit in Fig. 7 is the crankshaft angles of degree, and Y axle representation unit is that the lift and the unit of the suction valve of millimeter is the electric current I of ampere.Dotted line EC2 has shown the lift of suction valve, and its lift with the suction valve of early stage " shut " mode" EC1 shown in Figure 6 is identical.Solid line LO1 has shown the lift of the suction valve of the power consumpiton that has reduction under the 4th current-mode E7.The figure dotted line has shown normal running, and solid line has shown the retouching operation that power consumpiton reduces.
As shown in Figure 6, if the true temperature of ECU100 exceeds maximum temperature, so can be through closing the power consumpiton of suction valve EC1 reduction ECU100 in early days.Realize that during the high-temperature condition the another kind of mode that power consumpiton reduces is, opens valve mode through the delay shown in the line LO1 and substitutes early stage " shut " mode" EC2.In order to reduce power consumpiton, not when the angle Φ 4 of crankshaft angles, to open suction valve, but can when the angle Φ 5 of crankshaft angles, open suction valve and can close suction valve when the identical symmetry angle Φ 2.Suction valve postpones to open with respect to top dead center (TDC) during the aspirating stroke of explosive motor, and during the aspirating stroke of explosive motor, closes before in lower dead center (BDC).Top dead center is the position of piston when in the cylinder of explosive motor, arriving the position away from bent axle.Suction valve moves and cuts out along with cam at angle Φ 2 then, and it has identical fills with air in cylinder.Suction valve was opened in the time period of Φ 200.This shows through solid line LO1.Suction valve during the aspirating stroke of explosive motor (300) top dead center (TDC) open afterwards 10 spend to 50 the degree between.Preferably, suction valve during the aspirating stroke of explosive motor (300) top dead center (TDC) open afterwards 20 spend to 40 the degree between.It is identical that inhaled air keeps, because the air quantity in the cylinder is mainly confirmed by the shut-in time of suction valve.If postpone to open suction valve, piston produces lower pressure in the cylinder so, and velocity of piston is bigger, causes turbulent flow increase in the firing chamber, will help to increase the air that sucks cylinder.No matter therefore INO Φ 100 or 200 time periods of Φ, it is identical that fills with air all keeps.In order to open suction valve when the angle Φ 5 of crankshaft angles, the 4th current-mode E7 is increased to magnetizing current in advance from 0 ampere, is increased to Peak current P3 then, in angle Φ 5 shutoff solenoid valve.The 4th current-mode E7 is reduced to then and keeps electric current H3, so that solenoid valve is maintained in its closed position, makes suction valve follow moving of cam.At angle Φ 5, suction valve moves and follows cam and moves owing to cam, and closes at angle Φ 2.Therefore under the 4th current-mode E5, power is saved because of electric current H3, because suction valve only works in 200 time periods of Φ.
Fig. 8 has shown the lift of suction valve and the current-mode of solenoid valve.X axle representation unit in Fig. 8 is the crankshaft angles of degree, and Y axle representation unit is that the lift and the unit of the suction valve of millimeter is the electric current I of ampere.Dotted line FL3 has shown the lift of the 3rd current-mode E8 lower inlet valve when temperature is low.Solid line LO2 has shown the lift of the suction valve that power consumpiton reduces under the 4th current-mode E9.The figure dotted line has shown normal running, and solid line has shown the retouching operation that power consumpiton reduces.
Under the normal running when temperature is low, activate solenoid valve through the 3rd current-mode E8, to open the full lift FL3 of suction valve.As shown in Figure 8, the 3rd current-mode E8 is increased to magnetizing current in advance from 0 ampere, is increased to Peak current P4 then so that solenoid valve cuts out.And the 3rd current-mode E8 is reduced to and keeps electric current H4 then, so that solenoid valve is maintained in its closed position, makes suction valve open at angle Φ 6, and follows whole the moving that complete cam moves.Along with the mobile lower dead center BDC that exceeds crankshaft angles that extends to of cam, INO is to the lower dead center BDC that exceeds crankshaft angles.Solenoid valve cuts out the longer time, to realize the valve standard-sized sheet.The complete lift of mobile suction valve fully with respect to cam is called full lift, and it shows through FL3.
If the true temperature of ECU100 exceeds maximum temperature, can reduce the power consumpiton of ECU100.In order to reduce power consumpiton, not when the angle Φ 6 of crankshaft angles, to open suction valve, but can when the angle Φ 7 of crankshaft angles, open suction valve and before BDC, close suction valve at angle Φ 8.Therefore, the suction valve curve is similar in appearance to the full lift pattern, but the endurance is shorter.This shows through solid line LO2.This pattern has Fig. 6 and the described General of Fig. 7, can postpone to open and close in early days.Here the power consumpiton of utilizing the advantage of this two-mode to practice thrift ECU100.We know that the effect that the delay of suction valve is opened is that piston produces subatmospheric less pressure in the cylinder, fully opens up to suction valve.In case INO, air are inhaled into cylinder quickly.Likewise we know, the effect of closing suction valve in early days is, the air effusion cylinder that control is caught.The air of therefore catching in the cylinder keeps identical with full lift.Suction valve during the aspirating stroke of explosive motor (300) top dead center (TDC) open afterwards 10 spend to 50 the degree between.Preferably, suction valve during the aspirating stroke of explosive motor (300) top dead center (TDC) open afterwards 20 spend to 40 the degree between.In order to open suction valve when the angle Φ 7 of crankshaft angles, the 4th current-mode E9 is increased to magnetizing current in advance from 0 ampere, is increased to Peak current P4 then with in angle Φ 7 shutoff solenoid valve.The 4th current-mode E8 is reduced to then and keeps electric current H4, so that solenoid valve is maintained in its closed position, makes suction valve follow moving of cam.At angle Φ 7, suction valve is owing to cam moves, and follows moving of cam.The 4th current-mode E8 is reduced to 0 ampere then so that solenoid valve is opened, and makes suction valve close at angle Φ 8.Therefore through the 4th current-mode E9, power is saved because of electric current H4 at PW3 and PW4 time period.
Claims (9)
1. method that is used to reduce the power consumpiton of electronic control unit (ECU) (100); Wherein said electronic control unit (100) is used for explosive motor (300); Each cylinder of said explosive motor (300) comprises at least one suction valve (301) or at least one outlet valve (302) by electro-hydraulic system (202,203) control, wherein said electro-hydraulic system (202; 203) by solenoid valve (200; 201) control is used for said suction valve of variable actuation (301) or outlet valve (302), said method comprising the steps of:
-confirm the true temperature of said ECU (100);
-confirm the predetermined maximum temperature of said ECU (100);
-confirm predetermined condition, wherein when the true temperature of said ECU (100) exceeded the predetermined maximum temperature of said ECU (100), said predetermined condition was satisfied;
If-said predetermined condition is satisfied, so through a kind of power consumpiton that reduces said ECU (100) in the following method:
If a) said predetermined condition does not satisfy; (A1, A2 C1) realize the lift of said suction valve (301) or outlet valve (302) through first current-mode so; If said predetermined condition satisfies; (A3 C2) realizes the lift of said suction valve (301) or outlet valve (302), and wherein said first current-mode and said second current-mode are realized the identical lift of suction valve or outlet valve through second current-mode so;
B) if said predetermined condition does not satisfy, so through the 3rd current-mode (E1, E2; E4, E6 E8) realizes the lift of said suction valve (301) or outlet valve (302); If said predetermined condition satisfies, so through the 4th current-mode (E3, E5; E7; E9) realize the lift of said suction valve (301) or outlet valve (302), wherein said the 3rd current-mode and said the 4th current-mode are realized the different lift of said suction valve or outlet valve, but said the 3rd current-mode is filled identical with the cylinder air under said the 4th current-mode.
2. method according to claim 1; It is characterized in that; Controlled for the current-mode of said solenoid valve, (A1, the peak current pulse of a plurality of tight spacings A2) is replaced by the pulse of the reduction peak value of said second current-mode (A3) to make the current-mode of winning.
3. method according to claim 1; It is characterized in that; The current-mode of giving said solenoid valve is by said second current-mode (C2) control, make be not read at every turn said solenoid valve shut-in time but with engine cycles at interval or per three engine cycles or even shut-in time of less reading said solenoid valve.
4. method according to claim 1; It is characterized in that, in multiple cylinder engine, when said motor is in the underrun pattern, pass through the lift that solenoid valve (200,201) is realized said suction valve (301) or outlet valve (302); The cylinder of wherein said multiple cylinder engine is divided into two groups; First group with said the 4th current-mode (E3) operation, so that increase torque capacity, and second group with said current mode operation; But said first group torque capacity with said the 3rd current-mode (E1, E2) with said the 4th current-mode (E3) operate said first group identical with said second group torque capacity.
5. method according to claim 1 is characterized in that, said solenoid valve (200) makes said suction valve (301) during the aspirating stroke of said explosive motor, cut out before in lower dead center (BDC) with said the 4th current-mode (E5) control.
6. method according to claim 1; It is characterized in that; Said solenoid valve (200) is with said the 4th current-mode (E7; E9) control, make said suction valve postpone with respect to top dead center (TDC) during the aspirating stroke of said explosive motor to open and aspirating stroke at said explosive motor during close before in lower dead center (BDC).
7. method according to claim 6; It is characterized in that; The said suction valve (301) of said explosive motor (300) is spent between 50 degree opening 10 afterwards at said top dead center (TDC) during the aspirating stroke of said explosive motor (300), opens realize postponing.
8. method according to claim 6; It is characterized in that; The said suction valve (301) of said explosive motor (300) is spent between 40 degree opening 20 afterwards at said top dead center (TDC) during the aspirating stroke of said explosive motor (300), opens realize postponing.
9. electronic control unit (ECU) (100) that in explosive motor (300), uses, each cylinder of said explosive motor (300) comprises at least one suction valve (301) or at least one outlet valve (302) by electro-hydraulic system (202,203) control; Wherein said electro-hydraulic system (202; 203) by solenoid valve (200,201) control, be used for said suction valve of variable actuation (301) or outlet valve (302); In order to reduce the power consumpiton of said ECU (100), comprise with lower device:
-be used for confirming the device of the true temperature of said ECU (100);
-be used for confirming the device of the predetermined maximum temperature of said ECU (100);
-be used for confirming the device of predetermined condition, wherein when the true temperature of said ECU (100) exceeded the predetermined maximum temperature of said ECU (100), said predetermined condition was satisfied;
If-said predetermined condition is satisfied, so through with a power consumpiton that reduces said ECU (100) in the lower device:
If a) said predetermined condition does not satisfy; (A1, A2 C1) realize the lift of said suction valve (301) or outlet valve (302) through first current-mode so; If said condition satisfies; (A3 C2) realizes the device of the lift of said suction valve (301) or outlet valve (302), and wherein said first current-mode and said second current-mode are realized the identical lift of said suction valve or outlet valve through second current-mode so;
B) if said predetermined condition does not satisfy, so through the 3rd current-mode (E1, E2; E4, E6, E8) lift of said suction valve of realization or outlet valve; If said predetermined condition satisfies, so through the 4th current-mode (E3, E5; E7; E9) realize the device of the lift of said suction valve or outlet valve, wherein said the 3rd current-mode and said the 4th current-mode are realized the different lifts of said suction valve or outlet valve, but said the 3rd current-mode is identical with fills with air in said the 4th current-mode lower cylinder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE11153407 | 2011-02-04 | ||
| DE11153407.9 | 2011-02-04 |
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| Publication Number | Publication Date |
|---|---|
| CN102628382A true CN102628382A (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100239174A Pending CN102628382A (en) | 2011-02-04 | 2012-02-03 | Device for reducing power consumption of electronic control module and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113711181A (en) * | 2019-04-03 | 2021-11-26 | 美光科技公司 | Automotive electronic control unit pre-start for improved human interface performance |
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| WO2000063547A1 (en) * | 1999-04-21 | 2000-10-26 | Siemens Aktiengesellschaft | Control system for an internal combustion engine with electromechanically actuated charge change valves |
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Application publication date: 20120808 |