CN105658936B - Engine power lifting system and method - Google Patents
Engine power lifting system and method Download PDFInfo
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- CN105658936B CN105658936B CN201380077479.2A CN201380077479A CN105658936B CN 105658936 B CN105658936 B CN 105658936B CN 201380077479 A CN201380077479 A CN 201380077479A CN 105658936 B CN105658936 B CN 105658936B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 51
- 239000007924 injection Substances 0.000 claims abstract description 51
- 239000000446 fuel Substances 0.000 claims abstract description 36
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 230000006870 function Effects 0.000 claims description 11
- 230000008450 motivation Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000008485 antagonism Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 description 18
- 230000007423 decrease Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000006399 behavior Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/04—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
Abstract
Disclose a kind of engine power lifting system, correlation method and excavator for internal combustion engine.The system comprises sensing devices, for sensing the load that expectation overcomes by engine during power operation；And engine controller, which is connected engine and sensing device, for receiving the load information from sensing device and controlling the operation of engine.The engine controller is configured to, when load information instruction load increases to above a load threshold, start engine power promotion by the way that the fuel injection amount limitation of engine to be increased to and a raised the amount of injection limits from standard the amount of injection limitation, and engine power is terminated by the limitation of recovery standard the amount of injection after engine power promotion is enabled a preset period of time and is promoted.Engine can be effectively protected by disclosed system and method.
Description
Technical field
The present invention relates to a kind of engine power lifting system and methods, can apply in the vehicle equipped with internal combustion engine
Or in equipment.
Background technique
By automatically controlled oil-engine driven vehicle or equipment equipped with electronic controller, for controlling torque/speed of engine
Degree.Once detecting that overload is dangerous, engine is improved Engine full load by control and is limited so that engine with higher turn
Square operating.Raised limitation can enable in a short period of time, later, restore original limitation, to control engine power.
For example, patent document US2007028892A1 discloses a kind of internal combustion engine, and revolving speed can be restored by having
Power enhanced feature, wherein when determining that the running speed of engine is caused to reduce due to external load, fuel system
Operation fuel injection amount is increased to by specified maximum fuel output quantity or more by control.Next, in engine speed quilt
After recovery, the operation of fuel system returns to rated condition.
For restoring by engine power lifting implementation engine speed, increasing fuel injection amount and long-time
When operation, Engine Durability is challenged.Further, it is desirable to which coordinated control is equally driven by the engine during speed is restored
Each functional component, to protect engine and these functional components.
Summary of the invention
It is an object of the present invention to provide improved engine power enhanced features, can have during power is promoted
Effect ground protection engine.
According to an aspect of the invention, there is provided a kind of powered lift system for internal combustion engine, comprising: sensing
Device is used to sense the load that expectation is overcome by means of engine during power operation；And engine controller,
Which is connected the engine and sensing devices, for receiving the load information from the sensing device and controlling engine
Operation；Wherein, the engine controller is configured to, when load information instruction load increases to above a load threshold
When value, by by the limitation of the fuel injection amount of engine from standard the amount of injection limitation be increased to a raised the amount of injection limit and
Start engine power to be promoted, and by recovery standard the amount of injection after engine power promotion is enabled a preset period of time
It limits and terminates engine power promotion.
Preferably, the engine controller is further constructed to close to the disabling for following the preset period of time
Engine power is disabled in period to be promoted.
Preferably, the engine controller is further constructed to the output torque of monitoring engine, and works as and start
The output torque of machine close to or be located at model engine corresponding with the limitation of standard the amount of injection at full capacity on curve when starting send out
Motivation power is promoted.
Preferably, the engine controller is further constructed to the fuel injection amount of monitoring engine, and when hair
Starting engine power is promoted when the fuel injection amount of motivation is higher than a fuel injection amount threshold value.
Preferably, the fuel injection amount threshold value is about the 90% Dao about 100% of standard the amount of injection limitation.
Preferably, the engine controller is further constructed to the revolving speed of monitoring engine, and when engine
Starting engine power is promoted when revolving speed loss is higher than revolving speed loss threshold value.
Preferably, the revolving speed loss threshold value is about 40rpm to about 60rpm.
Preferably, the engine power lifting system further includes functional component control device, is integrated in or is connected to
Engine controller, is used for control function component, and the functional component is created antagonism the behaviour of the load by engine driving
It is used as power；Wherein, the functional component control device is configured to improve the behaviour of the functional component in the preset period of time
It is used as power.
Preferably, the functional component control device is further constructed to, when engine in the preset period of time
When revolving speed loss and/or torque are higher than default maximum level accordingly, reduce the operation power of the functional component.
Preferably, the engine is the engine of vehicle or equipment, such as the engine of Architectural Equipment.
According to another aspect of the present invention, a kind of excavator is provided comprising engine；It is driven by the engine hydraulic
System；With previously described engine power lifting system, it is used to provide engine power enhanced feature to engine.
Preferably, the engine power lifting system further includes hydraulic protecting module, be configured to start it is motor-driven
Power promotes the Fluid pressure improved in hydraulic system when being activated, and when the revolving speed of engine loses in the preset period of time
And/or torque is higher than reduction when presetting maximum level accordingly or the Fluid pressure in release hydraulic system.
Preferably, the hydraulic protecting module is integrated in engine controller, or is formed as individual hydraulic control
Device and be connected between the engine controller and hydraulic system.
According to another aspect of the invention, a kind of engine power method for improving for internal combustion engine is provided,
It include: that sensing it is expected the load overcome by engine during power operation；When load information instruction load increase to it is super
When crossing a load threshold, by the way that the fuel injection amount limitation of engine is increased to a raised spray from standard the amount of injection limitation
The amount of penetrating limits and starts engine power promotion；And pass through recovery after engine power promotion is enabled a preset period of time
Standard the amount of injection limits and terminates engine power promotion.
Preferably, the engine power method for improving further include: close to the disabling for following the preset period of time
Engine power is disabled in period to be promoted.
Preferably, the engine power method for improving further include: the behaviour of functional component is improved in the preset period of time
It is used as power, the functional component is created antagonism the operation power of the load by engine driving.
Preferably, the engine power method for improving further include: when the revolving speed of engine damages in the preset period of time
When mistake and/or torque are higher than default maximum level accordingly, reduce the operation power of the functional component.
In accordance with the invention it is possible to be effectively protected engine during engine power is promoted from loss.
Detailed description of the invention
Fig. 1 is the schematic diagram of the equipment with engine power enhanced feature of first embodiment according to the present invention；
Fig. 2 is the diagram for showing Engine full load restrictive curve.
Fig. 3 is the diagram for showing the offset of restrictive curve at full capacity of engine power enhanced feature according to the present invention.
Fig. 4 is the diagram for some factors considered in engine power enhanced feature of the invention.
Fig. 5 is the logic chart of engine power enhanced feature of the invention.
Fig. 6 is the schematic diagram of the equipment with engine power enhanced feature of second embodiment according to the present invention；
Fig. 7 is the hydraulic system Collaborative Control showed in restrictive curve at full capacity and the according to the present invention equipment of embodiment
Diagram；
Fig. 8 is the diagram for showing the example fuel injection control strategy of engine power enhanced feature of the invention.
Fig. 9 is the flow chart for showing the power enhanced feature of embodiment according to the present invention；And
Figure 10 is the flow chart for showing the hydraulic protecting function of embodiment according to the present invention.
Specific embodiment
Some preferred embodiments of engine power enhanced feature according to the present invention are described below with reference to accompanying drawings.
Firstly, it is necessary to point out, engine power enhanced feature of the invention can be applied to various equipped with internal combustion engine
Vehicle and equipment, such as Architectural Equipment, excavator etc. as shown in Figure 1.
It will be noted from fig. 1 that excavator includes internal combustion engine 10, it is used to that excavator to be driven to move on the ground, it is hydraulic
System 20 (two pump is shown in figure) is also driven by engine 10 to execute dredge operation and Motronic control maps control
Device 30 processed, which is connected engine 10 and hydraulic system 20, for receiving their operating parameter and controlling their operation.
Hydraulic system 20 bears load 40 in digging operations, this leads to the pressure change in hydraulic system 20.Engine
Controller 30 receive sensing device senses to hydraulic system 20 in pressure information (characterization as load), hydraulic system 20
Operating parameter, such as pump speed and engine 10 operation information, such as engine speed and torque, to control hair
The operation of motivation 10 and hydraulic system 20.
Known each engine has given fuel injection amount fixed (rotary speed-torque) curve at full capacity, such as
Shown in Fig. 2.This is to say, in each tachometer value, engine can only pass out fixed torque capacity.In general, engine
It should be in the point work below curve at full capacity, for example, the point 1 in Fig. 2.If the load rise of engine, torque can be mentioned
Point 2 of the height to close curve at full capacity.Then, if torque persistently increases, mode of operation can be moved from point 2 along curve at full capacity
Move a little 3.In point 3, torque increases to maximum level, but engine speed reduces relative to the revolving speed at point 2.Engine speed
Reduction may cause engine performance decline.For example, turning if engine speed declines from the point 3 that torque capacity is presented
Square also declines together with engine speed, so as to reach the point 4 or even engine that not only have low torque but also have the slow-speed of revolution
It may be stalled in point 5.
For given fuel injection amount, engine can be always with fixed curve manipulation at full capacity.In this way, once digging
Pick machine overload, engine speed decline are sensed, and then hydraulic oil is transmitted back to fuel tank, this will lead to energy loss.
Excavator shown in Fig. 1 is gone to, once overload is sensed in hydraulic system 20, such as excavator is in the behaviour that picks up
Boulder is encountered in work, the engine 10 being connected to hydraulic system just has the danger of overload.In this case, according to this hair
The basic conception of bright engine power enhanced feature, as shown in figure 3, the fuel quantity sprayed into engine 10 is controlled by engine
Device 30 controls and increases in short preset period of time Δ t, so that outward transport of the engine 10 in model engine curve E1 at full capacity
Row, and operated with raised Engine full load curve E2 to execute engine power enhanced feature.Curve T with the arrow can
To represent the real work torque of engine 10, to show the variation of the real work torque in dredge operation.As can be seen that pair
It can increase to raised in each engine speed n, the model engine maximum feasible torque T1 that curve E1 is defined at full capacity
The maximum feasible torque T2 that Engine full load curve E2 is defined, and the real work torque T of engineactiveTwo can be located at
Between a maximum feasible torque T1 and T2.
From in Fig. 3 it can further be seen that real work torque curve T and model engine at full capacity between curve E1 there are two
Intersection point C1 and C2.When the actual operating state of engine 10 reaches or will reach the first intersection point C1, engine controller 30
Increase fuel injection amount so that raised Engine full load curve E2 is presented.Then, after it have passed through preset period of time Δ t, start
Machine controller 30 restores ideal fuels the amount of injection so that model engine curve E1 at full capacity is presented.Preset period of time Δ t is confirmed as
So that, on the one hand, engine overload ability effectively improves the load to overcome the increase frequently encountered in dredge operation, another
Aspect can inhibit the durability of engine to deteriorate.
It is desirable that preset period of time Δ t is determined so that, in most cases, the second intersection point C2 falls in preset period of time
In Δ t.However, load it is too high and (even by raised Engine full load curve E2) when can not overcome, engine
Controller 30 can also restore model engine curve E1 at full capacity after it have passed through preset period of time Δ t, to protect engine 10, such as
It is described herein after.
It may be noted that engine power enhanced feature both can as previously described by 30 automatic trigger of engine controller,
It can be triggered by hand by excavator operator by button etc..
In order to trigger engine power enhanced feature, need to meet some or all of following condition.
1) limiting value of Δ n > mono-, wherein as shown in figure 4, Δ n is equal to the work in model engine at full capacity curve E1
Present engine revolving speed n at point P1 subtracts opposite with the torque capacity rank T1max on model engine at full capacity curve E1
Answer engine speed n0 (if Δ n is too small, it may occur however that engine speed rapid decrease, even trigger hair
After motivation power enhanced feature)；
2) motor torque reaches or close to model engine curve E1 at full capacity (in operating point P2)；
3) elevation amplitude for pumping out pressure of hydraulic system 20 is more than a limiting value；And
4) fall of engine speed is more than a limiting value.
In operating point P2, engine power enhanced feature is triggered so that motor torque can be in from the P2 of operating point
Existing torque increases to the torque (close to raised Engine full load curve E2) presented at the P3 of operating point, sends out without causing
Motivation revolving speed is remarkably decreased.
Then, if motor torque further increases, mode of operation along raised Engine full load curve E2 from
Operating point P3 is displaced to operating point P4, and wherein operating point P4 embodies the torque capacity grade on raised Engine full load curve E2
Other T2max, and T2max ratio T1max high Δ T.In this stage, engine speed decline ratio from operating point P2 to work
In the stage of point P3 faster.
After it have passed through preset period of time Δ t, engine power enhanced feature is terminated, no matter the mode of operation of engine 10
Whether fall into region of the model engine at full capacity below curve E1.Then, in additional after preset period of time Δ t neighbour
Duan Zhong, engine power enhanced feature is disabled, to protect engine 10 to avoid because starting engine power enhanced feature repeatedly
And it is damaged.Therefore, this extra period can be referred to as the disabling period.
Fig. 5 is the logic chart of the engine power enhanced feature executed by engine controller 30.In block B1, engine
Revolving speed and/or hydraulic pressure are sensed.Block B1 is connected to wherein to be stored with first or model engine torque limit at full capacity
The block B2 and block B3 for being wherein stored with second or raised Engine full load torque limit.Block B2 and B3 are connected to execute switching
The block B4 of function.
On the other hand, block B5 is trigger, is sent with trigger signal represented by block B6.Block B7 positioned at the downstream block B6
Receive the trigger signal in block B6.Block B8 positioned at the downstream block B7 allows the trigger signal in block B7 have passed through preset period of time
After be passed to block B9.Trigger signal in block B6 is also delivered to block B9.Block B9 holds the trigger signal from block B6 and B8
The operation of row logical "and", and block B4 is sent by consequential signal, one of block B2 and B3 are used to selectively connect to downstream by block B4
Block B10, in block B10 motor torque limitation is arranged to standard limitation or raised limitation.In downstream block B11, combustion
Material the amount of injection is determined.
When block B9 receives identical signal from block B6 and B8, block B9 sends a signal to block B4 to access block B3
And start engine power enhanced feature.Then, after it experienced preset period of time, block B9 receives reciprocal from block B6 and B8
Signal, and send a signal to block B4 and restore standard by terminating engine power enhanced feature to access block B2
Power operation.
In excavator shown in Fig. 1 as first embodiment of the invention, engine power enhanced feature can be by hair
Motivation electronic controller 30 is realized.Engine electronic control 30 can be the ECU (electronic control unit) of engine 10, can also
To be the separate controller being connected with Engine ECU.
Second embodiment according to the present invention adds on the basis of the power enhanced feature described in the first embodiment
Liquid feeding presses defencive function.In particular, excavator shown in fig. 6 includes internal combustion engine 10, it is used to drive excavator on the ground
Mobile, hydraulic system 20 is also driven by engine 10 to execute dredge operation, engine electronic control 30, which is connected
Engine 10, for receive engine operation parameters and control engine operation and hydraulic controller 50, which is connected or collection
At in engine electronic control 30, and it is also connected to hydraulic system 20, is drawn in hydraulic system 20 with receiving by load 40
The pressure information that rises and control the operation of hydraulic system 20.
Excavator shown in fig. 6 can be performed in unison with engine power enhanced feature and hydraulic protecting function.In particular,
Fig. 7 respectively illustrates the offset of restrictive curve at full capacity and hydraulic system 20 of engine 10 in its right part and left part
Restrictive curve deviates at full capacity.
The offset of restrictive curve at full capacity of engine 10 is similar to shown in Fig. 3, that is to say, that engine 10 has standard
Engine full load curve E1 and raised Engine full load curve E2, and hydraulic system 20 correspondingly has standard hydraulic full
Load curve L1 and raised hydraulic curve L2 at full capacity.It is sent out when engine 10 is controlled by engine controller 30 beyond standard
Curve E1 is operated motivation at full capacity, and is executed engine power with raised Engine full load curve E2 operation and promoted function
When energy, hydraulic system 20 is hydraulically controlled the control of device 50 and is displaced to from the hydraulic L1 of curve at full capacity of standard raised hydraulic full negative
Lotus curve L2.
Excavator according to figure 6, and (connect when load 40 is increased in the operating point P1 of engine referring to Fig. 7
It is bordering on model engine curve E1 at full capacity), engine power enhanced feature is activated, can be by engine controller 30 certainly
Dynamic starting passes through the start-up by hand such as button by excavator operator.Then Engine full load curve is increased to E2 from E1.
The operating point of engine can be displaced to the operating point for being at or slightly above model engine curve E1 at full capacity from operating point P1
P2.In operating point P2, motor torque and hydraulic pressure are all higher than at the P1 of operating point.
As load 40 persistently increases, it is completely negative that the operating point of engine can be displaced to raised engine from operating point P2
Operating point P3 on lotus curve E2.In this state, engine controller 30 will judge whether load 40 can be overcome.If
It overcomes, motor torque and hydraulic pressure will reduce, and the operating point of engine will be displaced to model engine at full capacity
Operating point P2 ' on curve E1, then engine controller 30 stops engine power enhanced feature.On the other hand, if hair
Motivation controller 30 judges that load 40 can not overcome, for example, by continuously improving motor torque and hydraulic from operating point P3
Pressure, 30 order hydraulic controller 50 of engine controller reduce the pressure in hydraulic system 20 initiatively to force engine
Operating point is displaced to P2 from operating point P3, to protect hydraulic system 20 from being damaged under lasting high pressure.Work as hydraulic system
Pressure in 20 is actively reduced, therefore the torque of engine 10 also reduces.In this way, also being protected using this hydraulic protecting function
Engine 10 is protected.
As the auxiliary protection to engine, two timers are equipped with for engine power enhanced feature, as shown in Figure 8.
In particular, timer 1 provides preset period of time Δ t, wherein engine power enhanced feature is activated, and timer 2 follows
In timer 1, to provide the disabling period, wherein engine power enhanced feature is disabled.In the disabling period that timer 2 provides
In, engine power enhanced feature cannot be activated, even if meeting power promotes condition, such as motor torque reaches at full capacity
Limitation or speed have decrease beyond triggering setting value.In particular, in fig. 8, horizontal line " Q_lim " represents ideal fuels injection
Amount limitation, horizontal line " Q_lim " represent engine power and promote the fuel injection amount after being triggered, and horizontal line " Boost " represents
The fuel injection amount limitation improved under engine power promotion state.Curve " situation 1 " indicates in preset period of time Δ t gram
Fuel injection control situation when overload has been taken, and curve " situation 2 " indicates when not overcoming overload in preset period of time Δ t
Fuel injection control situation.According to the present invention, in the disabling period, engine power enhanced feature cannot be activated, no matter liquid
Pressure pressure drops below trigger condition (for example, situation 1) again without reaching trigger condition or less (for example, situation 2).It is passing through
Crossed after the disabling period of the offer of timer 2, engine controller 30 will judge whether engine power enhanced feature should be by
It reactivates.
Using the disabling period, the deterioration of Engine Durability can be further limited.
Fig. 9 shows that the engine power that can be executed by previously described first and second embodiment promotes the stream of process
Cheng Tu.
In step S1, engine power promotes process and is activated.
Then, in step S2, engine controller judges whether engine power enhanced feature is accessed (enabling).If
It as a result is "No", then process comes step S20 to keep engine power enhanced feature to close (not enabling)；And if result is
"Yes", then process comes step S3.
In step S3, engine controller is waited, and wherein engine power enhanced feature, which is in, initiates or prepares for starting shape
State.
Then, in step S4, engine controller judges whether fuel injection amount is (more corresponding than the limitation of ideal fuels the amount of injection
In model engine curve at full capacity) a certain high percentage (such as about 90%) it is high, and the revolving speed loss of engine is
No is more than some pre-set levels (such as about 40rpm to about 60rpm, such as 40rpm).If result is "No", process is returned
Return to step S3；And if result is "Yes", process comes step S5.
In step S5, engine controller is arranged a raised fuel injection amount limitation and (corresponds to raised engine
Curve at full capacity).
Then, in step S6, engine controller judges whether actual fuel injection quantities limit than raised fuel injection amount
The a certain high percentage (such as about 70%) of system is low.If result is "Yes", process returns to step S3；And if result
For "No", then process comes step S7.
In step S7, engine controller judges whether fuel injection amount is higher than the limitation of ideal fuels the amount of injection and (is higher than it
100%).If result is "No", process returns to step S5；And if result is "Yes", process comes step S8.
In step S8, engine power enhanced feature is enabled by engine controller and/or kept.Meanwhile timer 1
It counts and increases an increment.
Then, in step S9, engine controller judges whether the counting of timer 1 is greater than a predetermined value.If result
For "No", then process returns to step S8, continues so that engine power promotes state；And if result is "Yes", it flows
Journey comes step S10.
In step S10, engine power enhanced feature is disabled.Meanwhile the counting of timer 2 increases an increment.
Then, in step S11, engine controller judges whether the counting of timer 2 is greater than a predetermined value.If result
For "No", then process returns to step S10, so that engine power promotion is persistently disabled；And if result is "Yes",
Process returns to step S3.
Figure 10 show can by previously described first and second embodiment execute and with it is shown in Fig. 9 start it is motor-driven
Power promotes the flow chart of the hydraulic protecting process of process coordinated implementation.
In step S101, hydraulic protecting process is started by hydraulic controller or engine controller.
Then, in step S102, hydraulic controller or engine controller judge the revolving speed loss and/or torque of engine
It whether is more than to preset maximum level accordingly.If result is "No", process returns to step S101；And if result is
"Yes", then process comes step S103.
In step S103, hydraulic controller or engine controller reduce the hydraulic output of hydraulic system actively to reduce liquid
Pressure pressure.
According to the present invention, by the way that a preset period of time is arranged, engine power enhanced feature is activated during this period, and herein
Engine power enhanced feature terminates later, minimum living family engine can not be damaged during power is promoted effectively, and start
The decline of machine durability is limited.
Be set in addition, passing through, wherein engine power enhanced feature a disabling period for directly following preset period of time
Disabled, the decline of Engine Durability is additionally limited.
In addition, using the hydraulic protecting function of enabling can be combined with engine power enhanced feature high load can be being crossed
Down while protecting hydraulic system and engine from impaired.
It is appreciated that design of the invention is also applied for other each although front describes the present invention referring to excavator
Vehicle and equipment of the kind equipped with internal combustion engine.
It is further appreciated that although describing hydraulic protecting function above for protection excavator hydraulic system, it is similar
Defencive function can be applied in vehicle and equipment by engine driving and bear load various functional components.
Although these embodiments only provide in an illustrative manner there has been described some particular implementations, without
It is intended to limit the scope of the invention.Appended claims and its equivalent replacement, which are intended to cover, all falls in the scope of the invention and purport
Interior modification, replacement and variation.
Claims (18)
1. a kind of engine power lifting system for internal combustion engine, comprising:
Sensing device is used to sense the load that expectation is overcome by means of engine during power operation；And
Engine controller, which is connected the engine and sensing devices, for receiving the load from the sensing device
Information and the operation for controlling engine；
Wherein, the engine controller is configured to, when the load information instruction load increase to above a load threshold,
And when Δ n mono- limiting value of >, by the way that the fuel injection amount limitation of engine is increased to one liter from standard the amount of injection limitation
High the amount of injection limits and starts engine power promotion, and leads to after engine power promotion is enabled a preset period of time
Over recovery standard the amount of injection limits and terminates engine power promotion, wherein Δ n is equal to model engine curve (E1) at full capacity
Present engine revolving speed n at interior operating point (P1) is subtracted and the torque capacity grade on model engine at full capacity curve (E1)
Not (T1max) corresponding engine speed n0.
2. engine power lifting system as described in claim 1, wherein the engine controller is further constructed to
It is promoted close to disabling engine power in the disabling period for follow the preset period of time.
3. engine power lifting system as described in claim 1, wherein the engine controller is further constructed to
Monitor engine output torque, and when engine output torque close to or be located at it is corresponding with the limitation of standard the amount of injection
Model engine at full capacity on curve when starting engine power promoted.
4. engine power lifting system as described in claim 1, wherein the engine controller is further constructed to
Monitor the fuel injection amount of engine, and starting is started when the fuel injection amount of engine is higher than a fuel injection amount threshold value
Mechanomotive force is promoted.
5. engine power lifting system as claimed in claim 4, wherein the fuel injection amount threshold value is standard the amount of injection
90% to the 100% of limitation.
6. the engine power lifting system as described in any one of claims 1 to 5, wherein the engine controller quilt
It is further configured to the revolving speed of monitoring engine, and the starting hair when the loss of the revolving speed of engine is higher than revolving speed loss threshold value
Motivation power is promoted.
7. engine power lifting system as claimed in claim 6, wherein revolving speed loss threshold value be 40rpm extremely
60rpm。
8. the engine power lifting system as described in any one of claims 1 to 5 further includes functional component control device,
It is integrated in or is connected to engine controller, is used for control function component, the functional component is by engine driving to generate
Fight the operation power of the load；
Wherein, the operation that the functional component control device is configured to improve the functional component in the preset period of time is moved
Power.
9. engine power lifting system as claimed in claim 8, wherein the functional component control device is by further structure
It causes, in the preset period of time when the loss of the revolving speed of engine and/or torque are higher than default maximum level accordingly, reduces
The operation power of the functional component.
10. the engine power lifting system as described in any one of claims 1 to 5, wherein the engine be vehicle or
The engine of equipment.
11. the engine power lifting system as described in any one of claims 1 to 5, wherein the engine is that building is set
Standby engine.
12. a kind of excavator, comprising:
Engine；
Hydraulic system driven by the engine；And
Such as engine power lifting system described in any item of the claim 1 to 8, it is used to provide engine power to engine
Enhanced feature.
13. excavator as claimed in claim 12, wherein the engine power lifting system further includes hydraulic protecting mould
Block is configured to improve the Fluid pressure in hydraulic system when engine power is promoted and is activated, and described default
When the loss of the revolving speed of engine and/or torque are higher than in reduction when presetting maximum level accordingly or release hydraulic system in period
Fluid pressure.
14. excavator as claimed in claim 13, wherein the hydraulic protecting module is integrated in engine controller,
Or is formed as individual hydraulic controller and is connected between the engine controller and hydraulic system.
15. a kind of engine power method for improving for internal combustion engine, comprising:
Sense the load for it is expected to overcome by engine during power operation；
When load information instruction load increases to above a load threshold and Δ n mono- limiting value of >, by by engine
Fuel injection amount limitation is increased to a raised the amount of injection limitation from standard the amount of injection limitation and starts engine power and promoted,
Wherein, Δ n is subtracted and is marked equal to the present engine revolving speed n at the operating point (P1) in model engine at full capacity curve (E1)
The corresponding engine speed n0 of torque capacity rank (T1max) on quasi- Engine full load curve (E1)；And
Engine power promotion be enabled after a preset period of time terminated by the limitation of recovery standard the amount of injection start it is motor-driven
Power is promoted.
16. engine power method for improving as claimed in claim 15, further includes:
It is promoted close to disabling engine power in the disabling period for follow the preset period of time.
17. the engine power method for improving as described in claim 15 or 16, further includes:
The operation power of functional component is improved in the preset period of time, the functional component is by engine driving to create antagonism
The operation power of the load.
18. engine power method for improving as claimed in claim 17, further includes:
In the preset period of time when the loss of the revolving speed of engine and/or torque are higher than default maximum level accordingly, reduce
The operation power of the functional component.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/077265 WO2014198065A1 (en) | 2013-06-14 | 2013-06-14 | Engine power boost system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105658936A CN105658936A (en) | 2016-06-08 |
| CN105658936B true CN105658936B (en) | 2019-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380077479.2A Active CN105658936B (en) | 2013-06-14 | 2013-06-14 | Engine power lifting system and method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN105658936B (en) |
| DE (1) | DE112013007158T5 (en) |
| WO (1) | WO2014198065A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168173A (en) * | 2016-08-30 | 2016-11-30 | 潍柴动力股份有限公司 | A kind of engine control strategy |
| CN108104965A (en) * | 2017-12-13 | 2018-06-01 | 天津雷沃发动机有限公司 | A kind of diesel engine intelligence torque control method |
| CN109630298B (en) * | 2018-12-12 | 2021-05-07 | 三一汽车制造有限公司 | Control method and control system of power system and engineering machinery |
| CN109356733B (en) * | 2018-12-12 | 2021-03-16 | 三一汽车制造有限公司 | Control method and control system of power system and engineering machinery |
| GB2601733B (en) * | 2020-12-01 | 2023-04-12 | Perkins Engines Co Ltd | Engine Torque Limit Control |
| CN114810370B (en) * | 2021-12-30 | 2023-08-18 | 潍柴动力股份有限公司 | Overload protection method, device and equipment for multi-fuel engine |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2014198065A1 (en) | 2014-12-18 |
| DE112013007158T5 (en) | 2016-03-24 |
| CN105658936A (en) | 2016-06-08 |
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