CN103527330A - Variable displacement - Google Patents
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- CN103527330A CN103527330A CN201310269227.1A CN201310269227A CN103527330A CN 103527330 A CN103527330 A CN 103527330A CN 201310269227 A CN201310269227 A CN 201310269227A CN 103527330 A CN103527330 A CN 103527330A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/06—Cutting-out cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0005—Deactivating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/02—Cutting-out
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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
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to a variable displacement. Enable all exhaust valves, intake valve and the cylinder from the disabled state of a multi-cylinder engine exhaust valve, intake valve and the intake valve and the exhaust valve of the cylinder is connected to a method and system. Said method comprising the following steps: a) to increase the first set of multi-cylinder engine cylinder to reduce fuel delivery to the multi-cylinder engine and a second group of cylinders of the fuel delivery volume of the second group of cylinders until the fuel delivery is substantially zero; b) sent to the second group of cylinders with a fuel volume is close to zero, disabling, and the second group of cylinders connected to the intake valve and the exhaust valve; and c) adjusting the fuel delivery of the first cylinder group in order to maintain the basic the engine output torque constant level.
Description
The cross reference of related application
The application requires the preference of the GB Patent Application No. 1211562.2 of submission on June 29th, 2012, and its full content is merged in herein by reference, for all objects.
Technical field
The present invention relates to the variable displacement in motor car engine, wherein variable displacement comprises one or more cylinders of stopping using.In particular, the present invention relates to engine condition that all cylinders all enable and stop or the seamless transition substantially of inactive engine condition to one or more cylinders, vice versa.
Background technique
In automotive engineering, variable-displacement example is the inactive of one or more cylinders in multicylinder engine.Cylinder deactivation is used to reduce the delivery temperature of fuel consumption, effulent and raising explosive motor, especially in underload running.
The in the situation that of four-banger, the cylinder deactivation of half conventionally, and second half maintenance is enabled.For example, the first and the 4th cylinder keeps enabling, meanwhile, and the second and the 3rd cylinder deactivation.Also stop using with the second intake valve being connected with the 3rd cylinder and exhaust valve.
Due to more inactive valves and connected cylinder thereof, pumping loss reduces, and each middle pressure of enabling cylinder increases, and is pumped to the volume of fuel that is pumped to cylinder when the volume of fuel of enabling cylinder can all be enabled with respect to all cylinders and increases.
Cylinder deactivation is realized by stop using/closing intake valve and the exhaust valve of specific cylinder conventionally.By keeping intake valve and exhaust valve closing, in firing chamber, produce " air cushion (air spring) ".Air cushion is compressed and produce during push piston downwards during it moves downward during piston moves upward in stranded exhaust (be prevented from before inflation burning).Compression and the decompression of stranded exhaust have balancing effect.Therefore, in general, on motor, there is not in fact extra load.The Pressure Drop of stopping using in cylinder is to the pressure close to crankcase pressure, and conventionally close to barometric pressure, this is because gas leakage is through valve seat and piston ring.
In known cylinder deactivation system, as used together with petrol engine, engine management system is carried for cutting off to the fuel of useless cylinder.In petrol engine, the combination---it is by utilizing Electronic Throttle Control to realize---that the timing of transition utilisation point fire, cam timing and the throttle position between normal engine running and exhaust valve, intake valve and the engine running of the cylinder deactivation that is connected changes becomes steady.
Yet the variation of ignition timing, cam timing and throttle position is not suitable for compression ignition engine, especially diesel engine conventionally.Therefore it is problematic, from normal engine running (wherein all cylinders and valve are all enabled), being transited into some cylinders and the inactive engine running of valve and transiting back that normal engine operates at compression ignition engine.
Therefore, expectation provides such optional method and system: it is applicable to all engine types, be particularly useful for direct-injection spark ignition engine and compression ignition engine, the smooth transition of the state that when state that while all enabling from all cylinders and valve to realize, motor turns round is stopped using to one or more cylinders and valve, motor turns round.
Summary of the invention
Therefore, a first aspect of the present invention provides the method for all exhaust valves, intake valve and cylinder are enabled from multicylinder engine state inactive exhaust valve, intake valve and the cylinder being connected with exhaust valve with intake valve, and method comprises the steps:
A) increase to the fuel of first group of cylinder of multicylinder engine and carry and reduce to the fuel of second group of cylinder of multicylinder engine and carry, until the volume of carrying to the fuel of second group of cylinder is substantially zero;
B) along with being delivered to the volume of fuel of second group of cylinder, approach zero, intake valve and the exhaust valve of stopping using and being connected with second group of cylinder; With
C) regulate the volume of carrying to the fuel of first group of cylinder, to maintain the engine output torque of substantial constant level.
According to the method for first aspect present invention, realized the situation that comprises cylinder, exhaust valve and the intake valve enabled completely from motor and comprised and enable and inactive cylinder, enable and inactive exhaust valve and enabling and the smooth transition of the situation of inactive intake valve to motor, this is may change and corresponding impact on cornering ability due to output torque when all valves are enabled under underload situation with the cylinder that is connected.
The increase of carrying to the fuel of first group of cylinder can increase progressively, and can supplement the minimizing of carrying to the fuel of second group of cylinder.
Advantageously, when the minimizing of carrying to the fuel of second group of cylinder is supplied in the increase of the fuel conveying to first group of cylinder, can realize the output torque of substantial constant level.
The increase of carrying to the fuel of first group of cylinder can be with the minimizing that the fuel to second group of cylinder is carried simultaneously.The level that the level of first group of cylinder fuel increase can reduce close to the fuel that is delivered to second group of cylinder.The fuel level that is delivered to first group of cylinder is adjustable, to maintain the output torque of constant level.
Advantageously, by increase simultaneously, be delivered to the fuel of first group of cylinder and reduce the fuel that is delivered to second group of cylinder, can realize the situation that comprises cylinder, exhaust valve and the intake valve enabled completely from motor and comprise and enabling and the smooth transition of the situation of inactive cylinder, exhaust valve and intake valve to motor.
The increase of carrying to the fuel of first group of cylinder and the minimizing of carrying to the fuel of second group of cylinder can be gradually in predetermined time section.
The adjusting of the inactive fuel level that is delivered to second group of cylinder that can limit with above-mentioned steps (a) of the intake valve being connected with second group of cylinder and exhaust valve occurs simultaneously, when the fuel that is delivered to second group of cylinder with box lunch approaches zero, the valve being connected with second group of cylinder is stopped using.
For making motor be back to the state that all cylinders are all enabled, require to enable again second group of cylinder and the valve being connected.Second group of cylinder can be enabled by adopting as above identical step---but in contrast---again.
Therefore, from being delivered to the fluid levels of second group of cylinder, be that the inactive engine operating status of valve zero and that be connected with second group of cylinder is enabled second group of cylinder and the valve being connected again, the method for wherein enabling again can comprise the steps:
A) enable again the valve being connected with second group of cylinder;
B) increase and be delivered to the fuel level of second group of cylinder and reduce the fuel level that is delivered to first group of cylinder;
C) regulate and be delivered to the fuel level of first group and second group cylinder, to maintain the output torque of substantial constant level.
Enabling again second group of cylinder and be connected in valve, the method can comprise the steps: to continue to increase the fuel level that is delivered to second group of cylinder, and also can continue to reduce being delivered to the fuel level of first group of cylinder, until be delivered to the volume of fuel of all cylinders, reach substantially the same level.
By increase, be delivered to the fuel level of second group of cylinder and reduced the fuel level that is delivered to first group of cylinder, the present invention realizes from motor and comprises that one or more cylinders of enabling comprise all smooth transitions of enabling cylinder and enabling the situation of valve with situation to the motor of valve with one or more inactive cylinders and the valve that is connected that be connected.
Be delivered to the minimizing that the increase of the fuel of second group of cylinder can be supplied the fuel that is delivered to first group of cylinder.When being delivered to the increase of the fuel of second group of cylinder and supplying the minimizing of the fuel that is delivered to first group of cylinder, can maintain the output torque of substantial constant level.
The increase that is delivered to the fuel of second group of cylinder can be with the minimizing that is delivered to the fuel of first group of cylinder simultaneously.Therefore, by increase simultaneously, be delivered to the fuel level of second group of cylinder and reduce the fuel level that is delivered to first group of cylinder, can realize from motor and comprise and enabling and inactive cylinder and enable and situation to the motor of inactive valve comprises the smooth transition of the situation of the cylinder of enabling completely and the valve of enabling completely.
Being delivered to the increase of fuel of second group of cylinder and the minimizing that is delivered to the fuel of first group of cylinder can be gradually in predetermined time section.Be delivered to the fuel of second group of cylinder and during minimizing is delivered to the fuel of first group of cylinder gradually, can maintain the output torque of substantial constant level increasing gradually.
A second aspect of the present invention provides engine management system, and it can operate to apply as mentioned above according to the method for first aspect.Therefore, engine management system can operate to control and be delivered to enabling and stopping using of valve that the fuel level of one or more cylinders is connected with the cylinder of multicylinder engine with control, and wherein engine management system comprises:
For increasing with reduce the device of carrying to the fuel of first group of cylinder of multicylinder engine;
For increasing with reduce the device of carrying to the fuel of second group of cylinder of multicylinder engine; With
For stopping using and enabling again the intake valve that is connected with second group of cylinder and the device of exhaust valve.
Substantially the seamless transition of the situation of motor car engine running when the situation that advantageously, realizes motor car engine running while all enabling with the valve that is connected from all cylinders according to the method and system of first aspect present invention and second aspect to one or more cylinders and the valve that is connected stopped using.Substantially the seamless transition of the situation of motor car engine running when situation to all cylinders that similarly, can realize motor car engine running while stopping using from one or more cylinders and the valve that is connected according to the method and system of first aspect present invention and second aspect are enabled with the valve that is connected.
A third aspect of the present invention provides many cylinders compression ignition engine, the method that it comprises the system of second aspect and adopts first aspect.
Many cylinders compression ignition engine can be diesel engine.Alternatively, many cylinders compression ignition engine can be petrol engine.
The above-mentioned advantage of this specification and other advantages and feature will be more obvious by following detailed description---be described separately or be described by reference to the accompanying drawings---.
Should be appreciated that, provide above summary of the invention to introduce in simplified form the selection of the concept to further describing in detailed description.It does not mean key or the substantive characteristics of determining claimed theme, and the scope of claimed theme limits by appended claims is unique.In addition, claimed theme is not limited to solve above-mentioned arbitrarily or in the enforcement of the shortcoming described in disclosure any part.And inventor herein has realized that the shortcoming proposing in this article, and does not admit that they are known.
Brief description
Embodiments of the present invention are now only described with way of example by reference to accompanying drawing, wherein:
Fig. 1 shows according to the schematic diagram of the motor of present disclosure.
Fig. 2 shows inactive and the schematic diagram of enabling again second group of cylinder and the method for the valve that is connected.
Embodiment
Embodiment of the present invention is described below, and wherein system and method provides the cylinder running that situation to the motor turning round from all cylinders of motor reduces quantity, that is, and and steady with the substantially seamless transition of situation when one or more cylinders are stopped using with the valve that is connected.
Fig. 1 describes the firing chamber of explosive motor 10 or the example mode of execution of cylinder.The control parameter that motor 10 can receive from control system---comprising controller 12---and the input receiving from vehicle driver 130 by input device 132.In this example, input device 132 comprises accelerator pedal and for generation of the pedal position sensor 134 of proportional pedal position signal PP.The cylinder of motor 10 (herein also referred to as " firing chamber ") 14 can comprise chamber wall 136, and wherein piston 138 is positioned at wherein.Piston 138 can be connected in bent axle 140, to the to-and-fro motion of piston is changed into rotatablely moving of bent axle.Bent axle 140 can be connected in by transmission system at least one driving wheel of passenger stock.In addition, starter motor can be connected in bent axle 140 by flywheel, so that the start-up function of motor 10 can be used.
Cylinder 14 can receive air inlet by a series of intake ducts 142,144 and 146.Except cylinder 14, intake duct 146 also can be communicated with other cylinders of motor 10.In some embodiments, one or more intake ducts can comprise supercharging device, such as turbosupercharger or mechanical supercharger.For example, Fig. 1 shows motor 10, and it disposes turbosupercharger, and this turbosupercharger comprises the compressor 174 being arranged between intake duct 142 and 144 and the exhaust driven gas turbine 176 arranging along air outlet flue 148.Compressor 174 can provide power by axle 180 at least in part by exhaust driven gas turbine 176, and wherein supercharging device is configured to turbosupercharger.Yet, in other examples, such as motor 10, being provided with in the example of mechanical supercharger, exhaust driven gas turbine 176 optionally omits, and wherein compressor 174 can provide power by the machinery input from motor or motor.Closure 20---comprises Rectifier plate 164---can be provided along engine inlets, so that flow velocity and/or the pressure providing to the air inlet of engine cylinder to be provided.For example, closure 20 can be arranged in the downstream of compressor 174, as shown in Figure 1, or, alternatively, can provide the upstream at compressor 174.
Except cylinder 14, air outlet flue 148 also can receive the exhaust from other cylinders of motor 10.Show that exhaust sensor 128 is connected in the air outlet flue 148 of emission control system 178 upstreams.Sensor 128 is optional certainly for providing exhaust air/fuel than the various suitable sensor of indication, as for example linear oxygen sensors or UEGO (general or wide territory exhaust oxygen), bifurcation lambda sensor or EGO (as described), HEGO (EGO of heating), NOx, HC or CO sensor.Emission control system 178 can be three-way catalyst (TWC), NOx catcher, various other emission control systems or its combination.
Delivery temperature can be measured by being arranged in one or more temperature transducer (not shown)s of air outlet flue 148.Alternatively, delivery temperature can be based on engine operating condition, and such as speed, load, air fuel ratio (AFR), ignition lag etc. inferred.In addition, delivery temperature can be calculated by one or more exhaust sensors 128.Should be appreciated that, delivery temperature can be alternatively assessed by the combination in any of the temperature evaluation method of enumerating herein.
Each cylinder of motor 10 all can comprise one or more intake valves and one or more exhaust valve.For example, show that cylinder 14 comprises at least one inlet poppet valves 150 and at least one the exhaust poppet valve 156 that is positioned at cylinder 14 upper areas.In some embodiments, each cylinder of motor 10---comprises cylinder 14---and all can comprise at least two inlet poppet valves and at least two the exhaust poppet valves that are positioned at cylinder upper region.
Cylinder 14 can have compression ratio, its volume ratio when in top center that is piston 138 in bottom centre.Conventionally, the scope of compression ratio is 9:1 to 10:1.Yet in some instances, in the situation that using different fuel, compression ratio can improve.This can occur in, for example, when using higher-octane fuel or have the fuel compared with the potential enthalpy of high evaporation.If directly sprayed while being employed due to its effect to engine knock, compression ratio also can be enhanced.
In some embodiments, each cylinder of motor 10 all can comprise spark plug 192, for taking fire.Under selected operator scheme, response carrys out the spark advance signal SA of self-controller 12, and ignition system 190 can provide ignition spark to firing chamber 14 by spark plug 192.Yet in some embodiments, spark plug 192 can be omitted, such as taking fire or take fire by burner oil by automatic ignition at motor 10---as some diesel engine---in the situation that.
As limiting examples, show that cylinder 14 comprises a fuel injector 166.Show that fuel injector 166 is directly connected in cylinder 14, with the pulsewidth of the signal FPW with receiving from controller 12 by electronic driver 168 direct fuel injection wherein pro rata.By this way, fuel injector 166 provides the direct injection (below also referred to as " DI ") that is called as fuel in combustion cylinder 14.Although Fig. 1 shows that sparger 166 is for side sparger, it also can be positioned at piston top, such as near spark plug 192 positions.Fuel can---comprise fuel tank, petrolift and fuel conduit---from high-pressure fuel system 8 and be delivered to fuel injector 166.Alternatively, fuel can be carried by single-stage petrolift under lower pressure, and in this case, the timing that direct fuel sprays is more limited during comparable use high-pressure fuel system during compression stroke.In addition, although do not show, fuel tank can have pressure transducer, and it provides signal to controller 12.Should be appreciated that, in optional mode of execution, sparger 166 can be intake port injection device, and it provides fuel in the suction port of cylinder 14 upstreams.
As mentioned above, Fig. 1 only shows a cylinder of multicylinder engine.Therefore, each cylinder all can comprise the device such as intake valve/exhaust valve, fuel injector (one or more), spark plug of itself similarly.
Although not do not show, not should be appreciated that, motor also can comprise one or more exhaust gas recirculation passages, to transport, from engine exhaust, be vented at least partly engine intake.Therefore, by some exhausts of recirculation, can affect motor dilution, this can improve engine performance by reducing engine knock, peak value combusted cylinder temperature and pressure, restriction loss and NOx discharge.One or more EGR passages can comprise LP-EGR passage, and it is connected between the engine intake of turbocharger compressor upstream and the engine exhaust port in turbine downstream, and are configured to provide low pressure (LP) EGR.One or more EGR passages also can comprise HP-EGR passage, and it is connected between the engine intake in compressor downstream and the engine exhaust port of turbine upstream, and are configured to provide high pressure (HP) EGR.In an example, HP-EGR flow can provide under such situation: such as not existing turbosupercharger that the situation of supercharging is provided, and LP-EGR flow can provide under such situation: such as there being the turbocharger supercharged and/or situation of delivery temperature when threshold value is above.LP-EGR flow by LP-EGR passage regulates via LP-EGR valve, and can regulate via HP-EGR valve (not shown) through the HP-EGR flow of HP-EGR passage.
The 110 available computers readable datas programmings of storage medium ROM (read-only memory), this mechanized data represent processor 106 executable, for carrying out the instruction of the method the following describes, and expection but other modification of specifically not listing.
Hereinafter, for example object, as an example, utilize four cylinders, four-stroke compression ignition engine, especially diesel engine is described the method for stop using one or more valves and the inactive cylinder that is connected.Should be appreciated that, the method and system the following describes is applicable to other multicylinder engine equally---and it comprises and being less than or more than four cylinders.For example, the method and system are applicable to three cylinders, five cylinders, six etc. equally.Can implement the method by the engine controller 12 being stored in ROM (read-only memory) 110.
With reference to figure 2, when method 210 starts, compression ignition engine turns round 212 routinely, and the intake valve and the exhaust valve that are wherein connected with all four cylinders are enabled, and wherein each cylinder all turns round in the cycle in conventional four-stroke.Compression ignition engine is followed following normal mode:
1) aspirating stroke; Wherein intake valve is opened, so that air enters cylinder and piston moves down; Then
2) compression/firing stroke: this along with IC Intake Valve Closes and piston upwards drive and compression cylinder in air, therefore the temperature of air is increased to and is directly injected to the point that the fuel of cylinder lighted a fire and starts; Then
3) working stroke: this is along with the fuel spraying spontaneously starts by the pressurized air igniting in cylinder.In cylinder, the air/fuel mixture of rapid combustion is along with it is attempted to expand in cylinder and forces piston to produce high pressure downwards; With, last
4) exhaust stroke: wherein by return to the effect of mobile piston to top dead center (Top Dead Centre), the gas producing from combustion process is discharged from cylinder via exhaust valve.
In this stage in method, should be appreciated that, the volume that is delivered to the fuel of each cylinder is consistent with normal operation method.
Load state can be monitored 214 energetically, and in underload situation and/or in order to improve the triggering of delivery temperature, occur in 216 event, at least one (in four-banger example) that the method for stop using one or more cylinders and the valve that is connected advances in four cylinders starts inactive situation.
Hereinafter, inactive method is described as method gradually and stage by stage, the volume that is wherein delivered to the fuel of each cylinder changes gradually in predetermined time section, to carry and be down to zero to the fuel of two cylinders in four cylinders, and therefore two cylinders are deactivated.
In the example of four-banger, engine management system is controlled the volume of the fuel that is delivered to all four cylinders.For the object of example, following instance relates to the cylinder 2 and 3 and the valve that is connected of stopping using.In following instance, the volume of fuel that is delivered to cylinder 2 and 3 is down to 0 218 gradually; And simultaneously, the volume of fuel that is delivered to cylinder 1 and 4 is increased gradually.Should be appreciated that, described method can be used for other combinations of inactive valve and the cylinder that is connected, the cylinder 1 and 4 of for example stopping using.
When being delivered to the fuel level of cylinder 2 and 3 and approaching 0 220, the intake valve and the exhaust valve that are connected with 3 with cylinder 2 are deactivated 222, so that they do not promote, until cylinder is enabled again.The valve being connected with 3 with cylinder 2 can be deactivated by suitable means, and described means for example, turn round to prevent to promote by controlling where necessary cam.Can realize valve lift by many methods controls, described method, such as hydraulic connecting (it can be filled with poppet or empty with poppet not) or many cams converting system---one of them cam profile produces and promotes and other cam profile does not produce lifting.
The volume of fuel that is delivered to cylinder 1 and 4 is monitored 224 energetically by engine management system, and the volume of fuel that is delivered to cylinder 2 and 3 is reduced, so that cylinder 2 and 3 receives zero fuels and the level that maintains output torque excessive period of situation about being deactivated running to from conventional engine.
Should be appreciated that, by increase and reduce the volume of fuel that is delivered to four cylinders simultaneously, cylinder 2 and 3 will be closed and cylinder 1 and 4 will continue fully running.
Should be noted that cylinder 2 and 3 is stopped using gradually and be not to close simply, the system from enabling completely of this means is enabled and the transition of the system of the cylinder of stopping using/close is seamless substantially to comprising.
The volume that is delivered to the fuel of cylinder 1 and 4 increases close to the volume that is delivered to cylinder 2 and 3 and reduces, but adjustable, to make the horizontal dimension of engine output torque be held in the level of underload event generation front engine output.
When being delivered to the fluid volume of cylinder 2 with 3, reach zero and the valve that is connected while stopping using, the volume of fuel that is delivered to cylinder 1 and 4 regulates 226 to such level: this horizontal engine output torque maintain with stop using cylinder 2 and 3 events before output torque substantial constant.The change of cylinder 1 and 4 fuel level equals to inhale the saving of merit (pumping work) to the valve relevant pump of stopping using approx.
When being delivered to the volume of fuel of cylinder 1 and 4 and reaching the maintenance level of output torque substantial constant, vehicle can effectively turn round 228 on two cylinders, produces and the conventional four cylinders relevant identical output torque that turns round simultaneously.
In more heavy duty event (230 no), motor is enabled all intake valves and exhaust valve again by requiring, and meanwhile, requires to enable cylinder 2 and 3 again.
The method of enabling again cylinder 2 and 3 is contrary with above-mentioned inactive method substantially.Therefore, the intake valve being connected with 3 with cylinder 2 and exhaust valve are enabled 232 again, the volume of fuel that is delivered to cylinder 2 and 3 increases gradually and the volume of fuel that is delivered to cylinder 1 and 4 reduces 234 gradually, so that engine output torque maintains output torque before occurring with in the event of enabling again substantially consistent 236.
The variation that is delivered to the volume of fuel of each cylinder is substantially equal to the variation that the pump relevant with the valve event of stopping using inhaled merit.
The fuel level that is delivered to cylinder 1 and 4 reduces gradually, and meanwhile, the fuel level that is delivered to cylinder 2 and 3 increases.Be delivered to the fuel level reducing and being on close level that the fuel that is delivered to cylinder 2 and 3 increases of cylinder 1 and 4, but the fuel level that relatively increases and reduce is by monitored and adjusting, so that engine output torque is consistent with the output torque before enabling again event.
The increase gradually and the minimizing that are delivered to the fuel of cylinder are proceeded, nominally to carry to the fuel of all cylinders be identical, and normal operation is established.
The same with above-mentioned inactive method, the volume of fuel that is delivered to all cylinders in enabling method is again conditioned 238 to such level: under this level, engine output torque maintains and enables the output torque substantial constant of cylinder event before occurring again.
Should be appreciated that, by increasing gradually and reduce to the fuel of all cylinders and carry, then the event of enabling is seamless substantially simultaneously.
Although the specific embodiment of the present invention described above, should be appreciated that, the mode of execution that deviates from description can still belong to scope of the present invention.
Note, the example comprising is herein controlled can application together with various motors and/or Vehicular system structure with appraisal procedure.Specific procedure described herein can represent one or more in the processing policy of arbitrary number, described processing policy such as event-driven, drives interrupts, Multi task, multithreading etc.Therefore, shown each action, operation or function all can shown in order in executed in parallel, or be omitted in some cases.Similarly, not necessarily require processing sequence to reach the Characteristics and advantages of example mode of execution as herein described, and be to provide, conveniently illustrate and describe.The action of one or more examples, operation and/or function can repeat, and this depends on applied specific strategy.In addition the coding that, the action of description, operation and/or function can the diagrammatic representation non-provisional storagies of motor control system Computer readable storage medium storing program for executing of setting out to be programmed.
Should be appreciated that, structure disclosed herein and program are in fact exemplary, and these embodiments are not treated with restrictive meaning, because many variations are possible.For example, above-mentioned technology is applicable to V-6, I-4, I-6, V-12, opposed 4 cylinders and other engine type.Theme of the present disclosure comprise various system disclosed herein and structure and further feature, function and/or character all novelties with non-obvious combination and sub-combination.
Claims are specifically noted and are considered to novel and non-obvious some combination and sub-combination.These claims may relate to " one (an) " element or " first " element or its equivalent.These claims should be understood to include in conjunction with one or more such elements, both neither requiring nor excluding two or more such elements.Other combination of disclosed feature, function, element and/or character and sub-combination can be by revising the application's claims or being protected by propose new claim in the application or related application.These claims---no matter its scope requires wider, narrower, identical or different for original rights---are also deemed to be included in theme of the present disclosure.
Claims (16)
1. the method for enabling state inactive exhaust valve, intake valve and the cylinder being connected with exhaust valve with described intake valve of all exhaust valves, intake valve and cylinder from multicylinder engine, described method comprises the steps:
A) increase to the fuel of first group of cylinder of described multicylinder engine and carry and reduce to the fuel of second group of cylinder of described multicylinder engine and carry, until the volume of carrying to the fuel of described second group of cylinder is substantially zero;
B) along with being delivered to the volume of fuel of described second group of cylinder, approach zero, described intake valve and the exhaust valve of stopping using and being connected with described second group of cylinder; With
C) regulate to the fuel of described first group of cylinder and carry, to maintain the output torque of the described motor of substantial constant level.
2. method according to claim 1, the increase of wherein carrying to the fuel of described first group of cylinder is gradually, and supplies the minimizing of carrying to the fuel of described second group of cylinder.
3. method according to claim 1 and 2, the increase of wherein carrying to the fuel of described first group of cylinder is with the minimizing that the fuel to described second group of cylinder is carried simultaneously.
4. according to the method described in claim 1,2 or 3, the fuel of wherein said first group of cylinder increases is on close level and is delivered to the level that the fuel of described second group of cylinder reduces.
5. according to the method described in arbitrary aforementioned claim, the fuel level that is wherein delivered to described first group of cylinder is adjustable, to maintain the output torque of constant level.
6. according to the method described in arbitrary aforementioned claim, the increase of wherein carrying to the fuel of described first group of cylinder and the minimizing of carrying to the fuel of described second group of cylinder are gradually in predetermined time section.
7. according to the method described in arbitrary aforementioned claim, described intake valve and exhaust valve and fuel level approaching zero generation simultaneously that is delivered to described second group of cylinder, the then inactive described valve being connected with described second group of cylinder of wherein stopping using and being connected with described second group of cylinder.
8. according to the method described in arbitrary aforementioned claim, from being delivered to the fluid levels of described second group of cylinder, be wherein that the inactive state of described valve zero and that be connected with described second group of cylinder is enabled described second group of cylinder and the described valve being connected again, wherein said method of enabling again comprises the steps:
A) enable again the described valve being connected with described second group of cylinder;
B) increase and be delivered to the fuel level of described second group of cylinder and reduce the fuel level that is delivered to described first group of cylinder; With
C) regulate and be delivered to the fuel level of described first group and second group cylinder, to maintain the output torque of substantial constant level.
9. method according to claim 8, comprises that continuing to increase the fuel level and the continuous decrease that are delivered to described second group of cylinder is delivered to the fuel level of described first group of cylinder, until it is substantially the same to be delivered to the amount of fuel of all cylinders.
10. method according to claim 8 or claim 9, is wherein delivered to the minimizing that the fuel that is delivered to described first group of cylinder is supplied in the increase of the fuel of described second group of cylinder.
Method described in 11. according to Claim 8,9 or 10, the increase that is wherein delivered to the fuel of described second group of cylinder is with the minimizing that is delivered to the fuel of described first group of cylinder simultaneously.
Method described in 12. according to Claim 8-11 any one, be wherein delivered to the increase of fuel of described second group of cylinder and the minimizing that is delivered to the fuel of described first group of cylinder and in predetermined time section be gradually and stage by stage.
13. engine management systems, it can operate to apply the method according to described in arbitrary aforementioned claim.
14. engine management systems according to claim 13, wherein said engine management system can operate to control and be delivered to enabling and stopping using of the fuel level of one or more cylinders and valve that control is connected with the cylinder of multicylinder engine, and wherein said engine management system comprises:
For increasing with reduce the device of carrying to the fuel of first group of cylinder of multicylinder engine;
For increasing with reduce the device of carrying to the fuel of second group of cylinder of described multicylinder engine; With
For stopping using and enabling again the intake valve that is connected with described second group of cylinder and the device of exhaust valve.
The compression ignition engine of cylinder more than 15., it comprises the system described in claim 13 to 14 and adopts the method described in claim 1 to 12.
16. many cylinders compression ignition engines according to claim 15, wherein said fuel is diesel oil.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1211562.2 | 2012-06-29 | ||
| GB1211562.2A GB2503499A (en) | 2012-06-29 | 2012-06-29 | Variable displacement by deactivation of one or more cylinders of an automobile engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103527330A true CN103527330A (en) | 2014-01-22 |
Family
ID=46721620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310269227.1A Pending CN103527330A (en) | 2012-06-29 | 2013-06-28 | Variable displacement |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103527330A (en) |
| DE (1) | DE102013212169A1 (en) |
| GB (1) | GB2503499A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041483A (en) * | 2014-04-25 | 2015-11-11 | 通用汽车环球科技运作有限责任公司 | Cylinder re-activation fueling control systems and methods |
| CN105275646A (en) * | 2014-06-02 | 2016-01-27 | 福特环球技术公司 | Method of fuel injection for a variable displacement engine |
| CN105545498A (en) * | 2014-10-22 | 2016-05-04 | 福特环球技术公司 | Method and system for engine temperature control |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10605209B2 (en) * | 2015-10-28 | 2020-03-31 | Cummins Inc. | Thermal management via exhaust gas recirculation |
| DE102020101391B4 (en) | 2020-01-22 | 2022-06-23 | Man Energy Solutions Se | Method and control device for operating a gas engine |
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| CN105545498A (en) * | 2014-10-22 | 2016-05-04 | 福特环球技术公司 | Method and system for engine temperature control |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2503499A (en) | 2014-01-01 |
| GB201211562D0 (en) | 2012-08-15 |
| DE102013212169A1 (en) | 2014-05-22 |
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