CN104747308B - Engine Injection Mass Correction and Control system - Google Patents

Engine Injection Mass Correction and Control system Download PDF

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Publication number
CN104747308B
CN104747308B CN201310743976.3A CN201310743976A CN104747308B CN 104747308 B CN104747308 B CN 104747308B CN 201310743976 A CN201310743976 A CN 201310743976A CN 104747308 B CN104747308 B CN 104747308B
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Prior art keywords
cylinder
engine
smooth degree
module
load
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CN104747308A (en
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崔丽
郭建春
吴瑾
赵阳
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Lianchuang Automotive Electronics Co Ltd
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Lianchuang Automotive Electronics Co Ltd
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Abstract

The invention discloses a kind of Engine Injection Mass Correction and Control system, including smooth degree index computing module, smooth degree control active module, smooth degree control module, cylinder balance oil mass correcting module;Smooth degree index computing module is for according to crankshaft-position signal, camshaft-position signal, the smooth degree index of each cylinder of calculating output engine;Smooth degree controls active module, starts or power cut-off for controlling smooth degree control module;Smooth degree control module, for balancing oil mass correcting module according to the smooth degree index and engine speed of each cylinder of engine, the smooth degree controlling value of each cylinder of load output engine to cylinder;Cylinder balances oil mass correcting module, for the smooth degree controlling value of engine each cylinder to be quantized into the distributive value revise signal of each cylinder injector of engine;The present invention, can control effectively to engine smooth degree in engine transient operation point, it is to avoid engine dynamic process accelerates discontinuous and shake.

Description

Engine Injection Mass Correction and Control system
Technical field
The present invention relates to engine technology, more particularly to Engine Injection Mass Correction and Control system.
Background technology
Due to the manufacture scattered error and the manufacture scattered error of engine of fuel injector, each cylinder of engine is caused to spray rail in identical When pressure and injection power-up time, it is also possible to which each cylinder combustion torque for engine occur is uneven, cause to start the irregularity that operates, The fluctuation of speed and vibrations.
Cause the uneven method of controlling of each cylinder currently for above-mentioned reason, mainly by each cylinder of comparison in certain angle Interior elapsed time piece information, carries out proportional integral (PI) control using the difference of the timeslice information and average temporal information System, forms the fuel oil injection amendment of each cylinder, so as to the combustion torque for reaching each cylinder is consistent, it is ensured that the operation smooth degree of engine.
Current control method, in case of a dynamic basis, the engine obtained by timeslice index is run smooth degree and is referred to Mark, can produce error, cause in dynamic process cylinder EQUILIBRIUM CALCULATION FOR PROCESS mistake, further cause dynamic process to accelerate discontinuous and tremble It is dynamic.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of Engine Injection Mass Correction and Control system, can be in dynamic feelings Under condition, the accurate distributive value for correcting each cylinder injector of engine, makes the combustion torque of each cylinder consistent, it is ensured that engine smooth-going operation.
Refer to solve above-mentioned technical problem, the Engine Injection Mass Correction and Control system that the present invention is provided, including smooth degree Mark computing module, smooth degree control active module, smooth degree control module, cylinder balance oil mass correcting module;
The smooth degree index computing module, sends out for according to crankshaft-position signal, camshaft-position signal, calculating output The smooth degree index of each cylinder of motivation,
En=D0n+D1n+D2n,
D0n=Cn*(Sn-1-Sn),
D1n=Sn-x-y-Sn,
D2n=k*max (0, (Sn-2z-Sn-Z)-(Sn-Z-Sn)),
EnFor the smooth degree index of the n-th cylinder;D0nFor the Static State Index of the n-th cylinder;D1nFor the dynamic indicator of the n-th cylinder;D2nFor The bent axle of the n-th cylinder turns round shake index;CnFor the cylinder number of the n-th cylinder, Cn=n, n are 1 to N integer, and N is engine cylinder number, N is 2,3, 4th, 5 or 6;SnFor a nearest working cycles duration of the n-th cylinder;Sn-1For the previous cylinder of the n-th cylinder a nearest working cycles when It is long;Sn-x-yFor a nearest working cycles duration of X+Y cylinders before the n-th cylinder;Sn-2zFor a nearest work of 2Z cylinders before the n-th cylinder Make circulation duration;Sn-zFor a nearest working cycles duration of Z cylinders before the n-th cylinder;K is coefficient;Max () is acquisition maximum Function;X:It is 3 when being 2,6 cylinder machine when being 2,5 cylinder machine when being 3,4 cylinder machine when being 2,3 cylinder machine during 2 cylinder machine;Y:It is 2,3 during 2 cylinder machine It is 3 when being 3,6 cylinder machine when being 4,5 cylinder machine when being 2,4 cylinder machine during cylinder machine;Z:It is 3 when being 2,3 cylinder machine during 2 cylinder machine;During 4 cylinder machine it is It is 3 when being 5,6 cylinder machine during 4,5 cylinder machine;
The smooth degree controls active module, and when engine speed and load are in active region, then output enables signal and arrives The smooth degree control module, otherwise output disable signal are to the smooth degree control module;
The smooth degree control module, when the enable signal that the smooth degree control active module sends is received, then Initialized, and:
If engine speed and load are in Closed loop operation area, into closed loop states, to the smooth degree index meter Calculate smooth degree index E that module calculates each cylinder of engine of outputnProportional integral computing is carried out respectively, is tied with proportional integral computing Fruit balances oil mass correcting module to the cylinder respectively as the smooth degree controlling value output of each cylinder of engine;
If engine speed and load are in open loop workspace, into open loop situations, then will before under open loop situations The final proportional integral operation result of each cylinder of engine, is multiplied by after a setting coefficient smooth degree control as each cylinder of engine respectively Value output processed balances oil mass correcting module to the cylinder;
The smooth degree control module, when the disable signal that the smooth degree control active module sends is received, then Quit work;
The cylinder balances oil mass correcting module, for the flat of each cylinder of engine that sends the smooth degree control module Compliance controlling value, is quantized into the distributive value revise signal of each cylinder injector of engine, respectively the corresponding each cylinder of control amendment engine Fuel injector distributive value;
The Closed loop operation area, is included in the active region;
The open loop workspace, be the active region the Closed loop operation area outside region.
Preferably, if the smooth degree controlling value of engine cylinder is more than 0, the distributive value for controlling the cylinder injector subtracts It is little;
If the smooth degree controlling value of engine cylinder is less than 0, the distributive value for controlling the cylinder injector increases.
Preferably, the active region, is engine speed more than the first rotating speed and is less than the second rotating speed, and engine is negative Lotus is more than the first load and the region less than the second load;
The Closed loop operation area, is engine speed more than the 3rd rotating speed and is less than the 4th rotating speed, and engine load More than the 3rd load and less than the 4th load;
First rotating speed<3rd rotating speed<4th rotating speed<Second rotating speed;
First load<3rd load<4th load<Second load.
Preferably, the setting coefficient, more than 0 and less than 1.5.
Preferably, the setting coefficient, is 0.8,0.9 or 1.1.
The Engine Injection Mass Correction and Control system of the present invention, imports new engine smooth degree index, new engine Smooth degree index is turned round three part of shake index by Static State Index, dynamic indicator, bent axle and is constituted, and in case of a dynamic basis, can also calculate Obtain accurately reflecting the index that each cylinder of engine runs smooth degree, smooth-going of the fuel oil smooth degree control module using each cylinder of engine Degree index, controls the distributive value of the corresponding cylinder injector of engine, engine smooth degree can be entered in engine transient operation point Row effective control, it is to avoid engine dynamic process accelerates discontinuous and shake.
Description of the drawings
In order to be illustrated more clearly that technical scheme, the accompanying drawing to using required for the present invention makees simple below Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people For member, on the premise of not paying creative work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the Engine Injection Mass Correction and Control system schematic of the present invention;
Fig. 2 is the net cycle time piece schematic diagram of each cylinder of the engine of different cylinder numbers.
Specific embodiment
Below in conjunction with accompanying drawing, clear, complete description is carried out to the technical scheme in the present invention, it is clear that described Embodiment is a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this area is general All other embodiment that logical technical staff is obtained on the premise of creative work is not made, belongs to protection of the present invention Scope.
Embodiment one
Engine Injection Mass Correction and Control system, as shown in figure 1, including smooth degree index computing module, smooth degree control Active module, smooth degree control module (FBC), cylinder balance oil mass correcting module;
The smooth degree index computing module, sends out for according to crankshaft-position signal, camshaft-position signal, calculating output The smooth degree index of each cylinder of motivation,
En=D0n+D1n+D2n,
D0n=Cn*(Sn-1-Sn),
D1n=Sn-x-y-Sn,
D2n=k*max (0, (Sn-2z-Sn-Z)-(Sn-Z-Sn)),
EnFor the smooth degree index of the n-th cylinder;D0nFor the Static State Index of the n-th cylinder;D1nFor the dynamic indicator of the n-th cylinder;D2nFor The bent axle of the n-th cylinder turns round shake index;CnFor the cylinder number of the n-th cylinder, Cn=n, n are 1 to N integer, and N is engine cylinder number, N is 2,3, 4th, 5 or 6;SnFor a nearest working cycles duration of the n-th cylinder;Sn-1For the previous cylinder of the n-th cylinder a nearest working cycles when It is long;Sn-x-yFor a nearest working cycles duration of X+Y cylinders before the n-th cylinder;Sn-2zFor a nearest work of 2Z cylinders before the n-th cylinder Make circulation duration;Sn-zFor a nearest working cycles duration of Z cylinders before the n-th cylinder;K is coefficient;Max () is acquisition maximum Function, max (0, (Sn-2z-Sn-Z)-(Sn-Z-Sn)) value be 0 with (Sn-2z-Sn-Z)-(Sn-Z-Sn) the greater;X:During 2 cylinder machine For 2, when being 3,4 cylinder machine during 3 cylinder machine for 2,5 cylinder machine when for 2,6 cylinder machine when be 3;Y:It is 2,4 cylinder machines when being 2,3 cylinder machine during 2 cylinder machine When being 4,5 cylinder machine for 3,6 cylinder machine when be 3;Z:It is 3 when being 2,3 cylinder machine during 2 cylinder machine;It is 5,6 cylinders when being 4,5 cylinder machine during 4 cylinder machine It is 3 during machine.The net cycle time piece of each cylinder of the engine of different cylinder numbers is as shown in Figure 2.
Bent axle is the main rotary gadget of engine, and after loading onto connecting rod, upper and lower (reciprocal) motion that can accept connecting rod becomes to follow Ring (rotation) is moved, and bent axle is that the translation of piston is converted into the rotation of bent axle so as to output engine power.Camshaft is living A part in piston engine, its effect are unlatching and the closed actions for controlling valve, and camshaft is to push gas by cam The inlet and exhaust valve of cylinder is realizing the opening and closing of valve.Crankshaft-position signal can be obtained using crankshaft position sensor, using cam Shaft position sensor can obtain camshaft-position signal (phase signal).
The smooth degree controls active module, and when engine speed and load are in active region, then output enables signal and arrives The smooth degree control module, otherwise output disable signal are to the smooth degree control module;
The smooth degree control module, when the enable signal that the smooth degree control active module sends is received, then Initialized, and:
If engine speed and load are in Closed loop operation area, into closed loop states, to the smooth degree index meter Calculate smooth degree index E that module calculates each cylinder of engine of outputnProportional integral (PI) computing is carried out respectively, is transported with proportional integral The smooth degree controlling value output that result is calculated respectively as each cylinder of engine balances oil mass correcting module to the cylinder;
If engine speed and load are in open loop workspace, into open loop situations, then will before under open loop situations The final proportional integral operation result of each cylinder of engine, is multiplied by after a setting coefficient smooth degree control as each cylinder of engine respectively Value output processed balances oil mass correcting module to the cylinder;
The Closed loop operation area, is included in the active region;
The open loop workspace, be the active region the Closed loop operation area outside region;
The smooth degree control module, when the disable signal that the smooth degree control active module sends is received, then Quit work;
The cylinder balances oil mass correcting module, for the flat of each cylinder of engine that sends the smooth degree control module Compliance controlling value, is quantized into the distributive value revise signal of each cylinder injector of engine, respectively the corresponding each cylinder of control amendment engine Fuel injector distributive value;If the smooth degree controlling value of engine cylinder is more than 0, the distributive value for controlling the cylinder injector subtracts It is little;If the smooth degree controlling value of engine cylinder is less than 0, the distributive value for controlling the cylinder injector increases.
Preferably, the setting coefficient is more than 0 and is less than 1.5, can for example be 0.8,0.9,1.1.
Preferably, the active region, is engine speed more than the first rotating speed and is less than the second rotating speed, and engine is negative Lotus is more than the first load and the region less than the second load;
The Closed loop operation area, is engine speed more than the 3rd rotating speed and is less than the 4th rotating speed, and engine load More than the 3rd load and less than the 4th load;
First rotating speed<3rd rotating speed<4th rotating speed<Second rotating speed;
First load<3rd load<4th load<Second load.
The Engine Injection Mass Correction and Control system of the present invention, this smooth degree index computing module are believed according to crank position Number, camshaft-position signal, calculate the smooth degree index of each cylinder of output engine;Smooth degree controls active module, control smooth-going Degree control module starts or power cut-off;Smooth degree control module, turns according to the smooth degree index and engine of each cylinder of engine Speed, the smooth degree controlling value of each cylinder of load output engine balance oil mass correcting module to cylinder;Cylinder balances oil mass correcting module, will The smooth degree controlling value of each cylinder of engine is quantized into the distributive value revise signal of each cylinder injector of engine;The engine of the present invention Distributive value Correction and Control system, imports new engine smooth degree index, and new engine smooth degree index is by Static State Index, dynamic State index, bent axle turn round three part of shake index composition, in case of a dynamic basis, can also be calculated and accurately reflect each cylinder fortune of engine The index of row smooth degree, smooth degree index of the fuel oil smooth degree control module using each cylinder of engine, controls engine respective cylinder The distributive value of fuel injector, can control effectively to engine smooth degree in engine transient operation point, it is to avoid start motor-driven State process accelerates discontinuous and shake.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention Within god and principle, any modification, equivalent substitution and improvements done etc. are should be included within the scope of protection of the invention.

Claims (5)

1. a kind of Engine Injection Mass Correction and Control system, it is characterised in that including smooth degree index computing module, smooth degree control Active module processed, smooth degree control module, cylinder balance oil mass correcting module;
The smooth degree index computing module, for according to crankshaft-position signal, camshaft-position signal, calculating output engine The smooth degree index of each cylinder,
En=D0n+D1n+D2n,
D0n=Cn*(Sn-1-Sn),
D1n=Sn-x-y-Sn,
D2n=k*max (0, (Sn-2z-Sn-Z)-(Sn-Z-Sn)),
EnFor the smooth degree index of the n-th cylinder;D0nFor the Static State Index of the n-th cylinder;D1nFor the dynamic indicator of the n-th cylinder;D2nFor the n-th cylinder Bent axle turn round shake index;CnFor the cylinder number of the n-th cylinder, Cn=n, n are 1 to N integer, and N is engine cylinder number, N be 2,3,4,5 or 6;SnFor a nearest working cycles duration of the n-th cylinder;Sn-1For a nearest working cycles duration of the previous cylinder of the n-th cylinder; Sn-x-yFor a nearest working cycles duration of X+Y cylinders before the n-th cylinder;Sn-2zFor a nearest job of 2Z cylinders before the n-th cylinder Circulation duration;Sn-zFor a nearest working cycles duration of Z cylinders before the n-th cylinder;K is coefficient;Max () is acquisition maximum letter Number;X:It is 3 when being 2,6 cylinder machine when being 2,5 cylinder machine when being 3,4 cylinder machine when being 2,3 cylinder machine during 2 cylinder machine;Y:It is 2,3 cylinders during 2 cylinder machine It is 3 when being 3,6 cylinder machine when being 4,5 cylinder machine when being 2,4 cylinder machine during machine;Z:It is 3 when being 2,3 cylinder machine during 2 cylinder machine;It is 4,5 during 4 cylinder machine It is 3 when being 5,6 cylinder machine during cylinder machine;
The smooth degree controls active module, and when engine speed and load are in active region, then output enables signal to described Smooth degree control module, otherwise output disable signal are to the smooth degree control module;
The smooth degree control module, when the enable signal that the smooth degree control active module sends is received, is then carried out Initialization, and:
If engine speed and load are in Closed loop operation area, into closed loop states, mould is calculated to the smooth degree index Block calculates smooth degree index E of each cylinder of engine of outputnProportional integral computing is carried out respectively, with proportional integral operation result point Smooth degree controlling value output not as each cylinder of engine balances oil mass correcting module to the cylinder;
If engine speed and load are in open loop workspace, into open loop situations, then will start under open loop situations before The final proportional integral operation result of each cylinder of machine, is multiplied by after a setting coefficient smooth degree controlling value as each cylinder of engine respectively Export the cylinder balance oil mass correcting module;
The smooth degree control module, when the disable signal that the smooth degree control active module sends is received, then stops Work;
The cylinder balances oil mass correcting module, the smooth degree of each cylinder of engine for the smooth degree control module is sent Controlling value, is quantized into the distributive value revise signal of each cylinder injector of engine, respectively the spray of the corresponding each cylinder of control amendment engine The distributive value of oily device;
The Closed loop operation area, is included in the active region;
The open loop workspace, be the active region the Closed loop operation area outside region.
2. Engine Injection Mass Correction and Control system according to claim 1, it is characterised in that
If the smooth degree controlling value of engine cylinder is more than 0, the distributive value for controlling the cylinder injector reduces;
If the smooth degree controlling value of engine cylinder is less than 0, the distributive value for controlling the cylinder injector increases.
3. Engine Injection Mass Correction and Control system according to claim 1, it is characterised in that
The active region, is engine speed more than the first rotating speed and is less than the second rotating speed, and engine load is more than first Load and the region less than the second load;
The Closed loop operation area, is engine speed more than the 3rd rotating speed and is less than the 4th rotating speed, and engine load is more than 3rd load and be less than the 4th load;
First rotating speed<3rd rotating speed<4th rotating speed<Second rotating speed;
First load<3rd load<4th load<Second load.
4. Engine Injection Mass Correction and Control system according to claim 1, it is characterised in that
The setting coefficient, more than 0 and less than 1.5.
5. Engine Injection Mass Correction and Control system according to claim 1, it is characterised in that
The setting coefficient, is 0.8,0.9 or 1.1.
CN201310743976.3A 2013-12-30 2013-12-30 Engine Injection Mass Correction and Control system Expired - Fee Related CN104747308B (en)

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CN111706440B (en) * 2020-06-22 2022-11-22 浙江吉利新能源商用车集团有限公司 Control method and system for engine and vehicle

Citations (2)

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Publication number Priority date Publication date Assignee Title
CN1862000A (en) * 2005-05-04 2006-11-15 通用汽车环球科技运作公司 Calibration of model-based fuel control with fuel dynamics compensation for engine start and crank to run transition
CN101103192A (en) * 2005-01-13 2008-01-09 通用汽车公司 Indivudual cylinder controller for four-cylinder engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3823643B2 (en) * 1999-12-03 2006-09-20 いすゞ自動車株式会社 Engine fuel injection control device
DE102010045083A1 (en) * 2010-09-13 2012-03-15 Volkswagen Ag Method and device for controlling an internal combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101103192A (en) * 2005-01-13 2008-01-09 通用汽车公司 Indivudual cylinder controller for four-cylinder engine
CN1862000A (en) * 2005-05-04 2006-11-15 通用汽车环球科技运作公司 Calibration of model-based fuel control with fuel dynamics compensation for engine start and crank to run transition

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