CN103277211B - Internal combustion gasoline engine natural inflow road with optimum organization piston ring sprays homogeneous lean combustion controlling method - Google Patents
Internal combustion gasoline engine natural inflow road with optimum organization piston ring sprays homogeneous lean combustion controlling method Download PDFInfo
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Abstract
The present invention relates to engine electric-controlled field, relate to a kind of internal combustion gasoline engine natural inflow road with optimum organization piston ring and spray homogeneous lean combustion controlling method, control unit of engine ECU is by the Detection Information of receiving sensor, the desired value of the testing signal received and setting is compared by ECU, feedback signal is exported, control air fuel ratio by power unit, described control unit of engine ECU comprises sensor interface circuitry, digital core circuitry and single-chip microcomputer, execution drive circuit, power circuit and communication circuit.The present invention is according to the Air intake characteristics of the motor of different displacements, former setting oil spout arteries and veins spectrum in configuration ECU, automatically resolves different Rate of load condensate, completes new setting, realize the large air fuel ratio of higher oil-saving effect, accurately completing motor setting comparatively works under high air-fuel ratio operating mode.
Description
Technical field
The present invention relates to engine electric-controlled field, particularly a kind of internal combustion gasoline engine natural inflow road with optimum organization piston ring sprays homogeneous lean combustion controlling method.
Background technique
Use rock gas as the car type of fuel at present in the world, its motor has two kinds of different control strategies, and one adopts equivalent burning, namely under optimum chemical equivalent condition, air mixes with optimal weight or volume proportions of ingredients with fuel, enters in combustion chamber of engine and burns; Another kind is lean combustion, and the fuel quantity namely supplied is lower than the scope needed for equivalent.The engine manufactory of north America region adopts the latter as main combustion strategies.The characteristic of lean combustion: flammable range is wide, and soiling value is minimum, and the consumption of fuel is low.The waste gas that fuel produces detects with lambda sensor, to understand the result of actual discharge, provides feedback signal carry out judging to engine electric-controlled unit ECU and revise, because the flammable range of rock gas own is wide, therefore the Near The Critical Point that the fuel quantity that ECU controls almost is being lighted a fire, fewer than general supply, if methane content is low, also feedback can be obtained in lambda sensor, to supplement more combustion gas, multiple-piece piston-ring is utilized to improve the sealing of cylinder, ensure the rated power of motor, such as Chinese patent, though patent No. multiple-piece piston-ring disclosed in 98217068.8 solves complex structure existing in prior art preferably, during installation fee, cost is higher, promote the deficiency that difficulty is larger, but also exist because twist type ring torsion is less than normal and cause frizing effect desirable not to the utmost, lubricating oil consumption is bigger than normal.Lean-combustion engine result in the height all suitable to the requirement of Design and manufacture due to adding of sparger, if arrange that unreasonable, accuracy of manufacturing does not reach requirement and causes insufficient rigidity even to be leaked gas can only losing more than gain.And for example Chinese patent, publication number is CN101338694A, discloses a kind of method of in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion, comprises oil sprayer, ECU (Electrical Control Unit) and spark plug, controls air fuel ratio limited.Air fuel ratio reaches 16 and occurs that spark plug can not occur phenomenon of catching fire by reliable ignition gasoline mixture with gasoline feeder, and Unburned fuel steam is discharged, and result is wasted oily exhaust emissions and is deteriorated.
Summary of the invention
For overcoming deficiency of the prior art, we provide a kind of Air intake characteristics of the motor according to different displacements, former setting oil spout arteries and veins spectrum in configuration ECU, the Rate of load condensate that automatic parsing is different, complete new setting, the internal combustion gasoline engine natural inflow road with optimum organization piston ring realizing the large air fuel ratio of higher oil-saving effect sprays homogeneous lean combustion controlling method.
According to inventing the design proposal provided, a kind of optimum organization piston ring, comprise and be arranged on upper twist type ring in piston ring groove and lower twist type ring, it is characterized in that: described upper twist type ring rectangular cross section lower surface has along inner-diameter end the inscribe step one that cross section is little rectangle, described lower twist type ring rectangular cross section upper surface has along inner-diameter end the lower inscribe step two that cross section is little rectangle, and the height of described inscribe step one is less than the height of inscribe step two.
Described lower twist type ring rectangular cross section lower surface has along external diameter end place the circumscribed step that cross section is similar to little rectangle.
a kind of with optimum organization piston ringinternal combustion gasoline engine natural inflow road sprays homogeneous lean combustion controlling method, control unit of engine ECU is by admission of air flowmeter, engine rotation speed sensor, phase detector, throttle valve body, closure potentiometer, idling closure potentiometer, Idle Switch, intake air temperature sensor, cooling-water temperature transmitter, wide lambda sensor, detonation sensor, additional vehicle speed signal, air condition compressor signal, the Detection Information of AIR COND SIG Air Conditioner Singnal, the desired value of the testing signal received and setting is compared by ECU, feedback signal is exported, air fuel ratio is controlled by power unit, described optimum organization piston ring is arranged in engine piston annular groove, described internal combustion gasoline engine natural inflow road sprays homogeneous lean combustion controlling method and comprises following steps:
Step 1: goal-selling air fuel ratio and the demarcation temperature corresponding with target air-fuel ratio, rated engine speed, demarcation closure data;
Step 2: detect motor real-time working condition, controls motor and runs under target air-fuel ratio, comprise following content:
Step 2.1:ECU receives engine coolant temperature sensor cts signal, if cts signal value is less than demarcation temperature, engine control operates under the air fuel ratio of correspondence, Quick high-engine temperature, otherwise cts signal value is more than or equal to demarcation temperature, goes to step 2.2;
Step 2.2:ECU closes situation according to Idle Switch and has determined whether idle signal, if there is idle signal, goes to step 2.3, if without idle signal, goes to step 2.4;
Step 2.3:ECU receives engine rotation speed sensor signal ne, if ne value equals rated engine speed, engine control operates under the air fuel ratio of correspondence, if ne value is not equal to rated engine speed, judge that motor is in extra duty operating mode, engine control operates under the air fuel ratio of correspondence;
Step 2.4:ECU receives throttle position sensor signal TPS, if TPS is less than or equal to demarcate closure data, proceeds to step 2.5, if TPS is greater than demarcate closure data, proceeds to step 2.6;
Step 2.5: judge that whether engine rotation speed sensor signal value ne is in Smaller load speed range, if so, then engine control operates under the air fuel ratio of correspondence, otherwise engine control operates under the air fuel ratio of correspondence;
Step 2.6: judge whether throttle position sensor signal TPS is in moderate duty TPS scope, if so, then proceed to step 2.7, otherwise engine control operates under the air fuel ratio of correspondence;
Step 2.7: judge that now whether engine rotation speed sensor signal value ne is in moderate duty speed range, if so, then engine control operates under corresponding air fuel ratio, otherwise engine control operates under corresponding air fuel ratio.
Described demarcation temperature is general purpose engine temperature, and rated engine speed is general purpose engine rotating speed, and demarcating closure data is general purpose engine closure data.
Described Smaller load speed range is 1800 ~ 2500 revs/min.
Described moderate duty speed range is 2000 ~ 4000 revs/min.
Described moderate duty TPS scope is 30 ~ 60%.
When engine cold-start, admission of air flowmeter testing signal, after warming-up completes, petrol engine enters hot idling operation, and testing signal is issued ECU signal by cooling-water temperature sensor, and ECU, according to idle signal, is undertaken from main control by the target air-fuel ratio of inner setting; Search oil spout arteries and veins spectrum and draw each injection time: according to wide air/fuel ratio oxygen sensor feedback signal, revise injection time, make actual mixing ratio be stabilized in target control point place; Control it when hot idling operation and use larger air fuel ratio; In running process, ECU is according to throttle position sensor, send the Rate of load condensate that signal draws petrol engine, according to target air fuel ratio is set according to payload difference, corresponding injection time is searched in oil spout arteries and veins spectrum, according to wide air fuel ratio-lambda sensor feedback signal, carry out injection time correction, reach pre-provisioning request air fuel ratio.
Described control unit of engine ECU sensor interface circuitry output terminal connects digital core circuitry input end, digital core circuitry output terminal connects execution drive circuit input end, digital core circuitry is electrically connected with single-chip microcomputer, power circuit output end connects single-chip microcomputer and digital core circuitry power interface, and communication circuit is electrically connected with single-chip microcomputer and digital core circuitry.
Described power circuit comprises digital core power circuit, sensor electrical source circuit, performs driving switch power circuit.
Described communication circuit comprises K interface circuit, CAN interface circuit, LIN bus interface circuit, FlexRay interface circuit.
Beneficial effect of the present invention:
1. optimum organization piston ring of the present invention comprises and is arranged on upper twist type ring in piston ring groove and lower twist type ring, twist type ring torsion is reasonable, sealing is strengthened, engine oil consumption reduces, air inflow increases and oil consumption reduces further, and oil consumption lowers, and avoids the pollution of machine oil to gasoline, burning nature, gasoline can be kept himself can the person's character of lean combustion.
2. the present invention is according to the Air intake characteristics of the motor of different displacements, and the former setting oil spout arteries and veins spectrum in configuration ECU, automatically resolves different Rate of load condensate, complete new setting, realize the large air fuel ratio of higher oil-saving effect;
3. air of the present invention arrives intake manifold after filtering, period air inflow be assigned to each cylinder through intake manifold after being detected by Air flow meter.Air inflow numerical value to be divided by by engine revolution and cylinder number through ECU internal processes and to show that every cylinder sucks air quantity at every turn, and then ECU is again by motor now residing features: requirement air fuel ratio determined by temperature, load, revolution.From inner oil spout arteries and veins spectrum, find injection time that item answers again and when intake stroke commencement of fuel injection.In suction stroke and compression stroke, due to air and the stirring of gasoline particles and the effect of high temperature, gasoline particles flashes to gasoline vapor and also fully mixes with combustion-supporting air simultaneously;
4. ECU of the present invention is by features residing for motor: temperature, load, rotary speed data determine requirement ignition advance angle, and send fire signal in the ignition advance angle arrival moment, spark ignitor mixed gas petrol engine enters working stroke.Scavenge in exhaust stroke and to detect through wide air/fuel ratio oxygen sensor, find to be set with error with ECU; Pass signal back ECU and revise injection time again.Automatic control regulates so repeatedly, accurately can complete motor setting comparatively to work under high air-fuel ratio operating mode.
accompanying drawing illustrates:
Fig. 1 is one of optimum organization piston ring cross section structural representation of the present invention;
Fig. 2 is optimum organization piston ring cross section structural representation two of the present invention;
Fig. 3 is one of optimum organization piston ring structure schematic diagram that inventive piston is installed;
Fig. 4 is the optimum organization piston ring structure schematic diagram two that inventive piston is installed;
Fig. 5 is that internal combustion gasoline engine natural inflow road of the present invention sprays homogeneous lean combustion controlling method ECU control circui block diagram;
Fig. 6 is that internal combustion gasoline engine natural inflow road of the present invention sprays homogeneous lean combustion controlling method fundamental diagram;
Fig. 7 is that internal combustion gasoline engine natural inflow road of the present invention sprays homogeneous lean combustion controlling method ECU circuit working FB(flow block);
Fig. 8 is that internal combustion gasoline engine natural inflow road of the present invention sprays homogeneous lean combustion controlling method workflow diagram.
embodiment:
Number in the figure 1 represents piston, label 2 representing optimized multiple-piece piston-ring, and label 3 represents compression ring, and label 4 represents oil ring, and label 5 represents cylinder casing wall, twist type ring on label 2-1 representing optimized multiple-piece piston-ring, twist type ring under label 2-2 representing optimized multiple-piece piston-ring.
Embodiment one: see Fig. 1, shown in Fig. 3 and Fig. 4, a kind of optimum organization piston ring, comprise and be arranged on upper twist type ring in piston ring groove and lower twist type ring, described upper twist type ring rectangular cross section lower surface has along inner-diameter end the inscribe step one that cross section is little rectangle, described lower twist type ring rectangular cross section upper surface has along inner-diameter end the lower inscribe step two that cross section is little rectangle, the height of described inscribe step one is less than the height of inscribe step two, for the middle automobile with small output volumn of cylinder footpath≤φ 80mm, lower twist type ring plays sweep-out mechanism oiliness energy, upper twist type ring plays sealing gas performance, combinationally using of they can greatly improve than the frizing of single piston ring and gas confining.
Embodiment two: shown in Figure 2, and difference substantially identical with embodiment one is: described lower twist type ring rectangular cross section lower surface has along external diameter end place the circumscribed step that cross section is similar to little rectangle, the automobile of Yong Yu≤φ 80mm cylinder diameter huge discharge.
Embodiment three: shown in Fig. 1, Fig. 3 ~ 7, and the internal combustion gasoline engine natural inflow road with optimum organization piston ring sprays homogeneous lean combustion controlling method, and control unit of engine ECU is by admission of air flowmeter, engine rotation speed sensor, phase detector, throttle valve body, closure potentiometer, idling closure potentiometer, Idle Switch, intake air temperature sensor, cooling-water temperature transmitter, wide lambda sensor, detonation sensor, additional vehicle speed signal, air condition compressor signal, the Detection Information of AIR COND SIG Air Conditioner Singnal, the desired value of the testing signal received and setting is compared by ECU, and feedback signal exported, control air fuel ratio by power unit, described control unit of engine ECU comprises sensor interface circuitry, digital core circuitry and single-chip microcomputer, perform drive circuit, power circuit and communication circuit, optimum organization piston ring is arranged in engine piston annular groove, described optimum organization piston ring comprises twist type ring and lower twist type ring, described upper twist type ring rectangular cross section lower surface has along inner-diameter end the inscribe step one that cross section is little rectangle, described lower twist type ring rectangular cross section upper surface has along inner-diameter end the lower inscribe step two that cross section is little rectangle, the height of described inscribe step one is less than the height of inscribe step two, for the middle automobile with small output volumn of cylinder footpath≤φ 80mm, lower twist type ring plays sweep-out mechanism oiliness energy, and upper twist type ring plays sealing gas performance.
Internal combustion gasoline engine natural inflow road sprays homogeneous lean combustion controlling method, control unit of engine ECU is by admission of air flowmeter, engine rotation speed sensor, phase detector, throttle valve body, closure potentiometer, idling closure potentiometer, Idle Switch, intake air temperature sensor, cooling-water temperature transmitter, wide lambda sensor, detonation sensor, additional vehicle speed signal, air condition compressor signal, the Detection Information of AIR COND SIG Air Conditioner Singnal, the desired value of the testing signal received and setting is compared by ECU, feedback signal is exported, air fuel ratio is controlled by power unit, described control unit of engine ECU comprises sensor interface circuitry, digital core circuitry and single-chip microcomputer, perform drive circuit, power circuit and communication circuit.
When engine cold-start, admission of air flowmeter testing signal, after warming-up completes, petrol engine enters hot idling operation, and testing signal is issued ECU signal by cooling-water temperature sensor, and ECU, according to idle signal, is undertaken from main control by the target air-fuel ratio of inner setting; Search oil spout arteries and veins spectrum and draw each injection time: according to wide air/fuel ratio oxygen sensor feedback signal, revise injection time, make actual mixing ratio be stabilized in target control point place; Control it when hot idling operation and use larger air fuel ratio; In running process, ECU is according to throttle position sensor, send the Rate of load condensate that signal draws petrol engine, according to target air fuel ratio is set according to payload difference, corresponding injection time is searched in oil spout arteries and veins spectrum, according to wide air fuel ratio-lambda sensor feedback signal, carry out injection time correction, reach pre-provisioning request air fuel ratio.
Described control unit of engine ECU sensor interface circuitry output terminal connects digital core circuitry input end, digital core circuitry output terminal connects execution drive circuit input end, digital core circuitry is electrically connected with single-chip microcomputer, power circuit output end connects single-chip microcomputer and digital core circuitry power interface, and communication circuit is electrically connected with single-chip microcomputer and digital core circuitry.
Described power circuit comprises digital core power circuit, sensor electrical source circuit, performs driving switch power circuit.
Described communication circuit comprises K interface circuit, CAN interface circuit, LIN bus interface circuit, FlexRay interface circuit.
Described internal combustion gasoline engine natural inflow road sprays homogeneous lean combustion controlling method and comprises following steps:
Step 1: goal-selling air fuel ratio and the demarcation temperature corresponding with target air-fuel ratio, rated engine speed, demarcation closure data;
Step 2: detect motor real-time working condition, controls motor and runs under target air-fuel ratio.
Described step 2 comprises following content:
Step 2.1:ECU receives engine coolant temperature sensor cts signal, if cts signal value is less than demarcation temperature, engine control air fuel ratio AF=14.7 operates, Quick high-engine temperature, otherwise cts signal value is more than or equal to demarcation temperature, goes to step 2.2;
Step 2.2:ECU closes situation according to Idle Switch and has determined whether idle signal, if there is idle signal, goes to step 2.3, if without idle signal, goes to step 2.4;
Step 2.3:ECU receives engine rotation speed sensor signal ne, if ne value equals rated engine speed, operates under engine control AF=24, if ne value is not equal to rated engine speed, judge that motor is in extra duty operating mode, engine control AF=14.7 operates;
Step 2.4:ECU receives throttle position sensor signal TPS, if TPS is less than or equal to demarcate closure data, proceeds to step 2.5, if TPS is greater than demarcate closure data, proceeds to step 2.6;
Step 2.5: judge that whether engine rotation speed sensor signal value ne is in Smaller load speed range, if so, then engine control AF=20 operates, otherwise engine control AF=18 operates;
Step 2.6: judge whether throttle position sensor signal TPS is in moderate duty TPS scope, if so, then proceed to step 2.7, otherwise engine control AF=14.7 operates;
Step 2.7: judge that now whether engine rotation speed sensor signal value ne is in moderate duty speed range, if so, then engine control AF=18 operates, otherwise engine control AF=17 operates.
Described demarcation temperature is general purpose engine temperature, namely 80
0c, rated engine speed is general purpose engine rotating speed, namely 800 revs/min, and demarcating closure data is general purpose engine closure data, is 30%.
Described Smaller load speed range is 1800 ~ 2500 revs/min.
Described moderate duty speed range is 2000 ~ 4000 revs/min.
Described moderate duty TPS scope is 30 ~ 60%.
Embodiment four: shown in Fig. 2 ~ 7, and substantially identical with embodiment three, difference is: 1.5 liters mobilize its hot idling air fuel ratio AF of petrol engine to be set as that 23, TPS is greater than 0 ~ 25% load time, air fuel ratio AF is set as 20; TPS is greater than 25% ~ 75%, and load air fuel ratio AF sets 18; TPS is greater than 75% ~ 100% load, and air fuel ratio AF is set as 14.7.At urban congestion road, the more former car fuel-economizing of actual measurement hundred kilometers, automobile reaches 1.2 liters; Expressway 100 ~ 120 kilometers of speed per hours travel, and more former car fuel-economizing reaches 1.4 liters.
This innovation point practical application explanation above-mentioned, this lean combustion method is before petrol engine dispatches from the factory, a series of corresponding debugging can be completed rapidly, optimal air-fuel ratio AF can be reached, in actual motion after dispatching from the factory, without the need to doing any debugging again, ECU can control predeterminated target air fuel ratio automatically, reaches best oil-saving effect.
Claims (5)
1. the internal combustion gasoline engine natural inflow road with optimum organization piston ring sprays homogeneous lean combustion controlling method, optimum organization piston ring is arranged in engine piston annular groove, described optimum organization piston ring comprises and is arranged on upper twist type ring in piston ring groove and lower twist type ring, it is characterized in that: described upper twist type ring rectangular cross section lower surface has along inner-diameter end the inscribe step one that cross section is little rectangle, described lower twist type ring rectangular cross section upper surface has along inner-diameter end the lower inscribe step two that cross section is little rectangle, the height of described inscribe step one is less than the height of inscribe step two, described internal combustion gasoline engine natural inflow road sprays homogeneous lean combustion controlling method and comprises following steps:
Step 1: goal-selling air fuel ratio and the demarcation temperature corresponding with target air-fuel ratio, rated engine speed, demarcation closure data;
Step 2: detect motor real-time working condition, controls motor and runs under target air-fuel ratio, specifically comprise following content:
Step 2.1:ECU receives engine coolant temperature sensor cts signal, if cts signal value is less than demarcation temperature, engine control operates under the air fuel ratio of correspondence, Quick high-engine temperature, otherwise cts signal value is more than or equal to demarcation temperature, goes to step 2.2;
Step 2.2:ECU closes situation according to Idle Switch and has determined whether idle signal, if there is idle signal, goes to step 2.3, if without idle signal, goes to step 2.4;
Step 2.3:ECU receives engine rotation speed sensor signal ne, if ne value equals rated engine speed, engine control operates under the air fuel ratio of correspondence, if ne value is not equal to rated engine speed, judge that motor is in extra duty operating mode, engine control operates under the air fuel ratio of correspondence;
Step 2.4:ECU receives throttle position sensor signal TPS, if TPS is less than or equal to demarcate closure data, proceeds to step 2.5, if TPS is greater than demarcate closure data, proceeds to step 2.6;
Step 2.5: judge that whether engine rotation speed sensor signal value ne is in Smaller load speed range, if so, then engine control operates under the air fuel ratio of correspondence, otherwise engine control operates under the air fuel ratio of correspondence;
Step 2.6: judge whether throttle position sensor signal TPS is in moderate duty TPS scope, if so, then proceed to step 2.7, otherwise engine control operates under the air fuel ratio of correspondence;
Step 2.7: judge that now whether engine rotation speed sensor signal value ne is in moderate duty speed range, if so, then engine control operates under corresponding air fuel ratio, otherwise engine control operates under corresponding air fuel ratio.
2. the internal combustion gasoline engine natural inflow road with optimum organization piston ring according to claim 1 sprays homogeneous lean combustion controlling method, it is characterized in that: described demarcation temperature is set as general purpose engine empirical value temperature, rated engine speed is set as general purpose engine empirical value rotating speed, and demarcating closure data setting is general purpose engine empirical value closure data.
3. the internal combustion gasoline engine natural inflow road with optimum organization piston ring according to claim 1 sprays homogeneous lean combustion controlling method, it is characterized in that: described Smaller load speed range is 1800 ~ 2500 revs/min.
4. the internal combustion gasoline engine natural inflow road with optimum organization piston ring according to claim 1 sprays homogeneous lean combustion controlling method, it is characterized in that: described moderate duty speed range is 2000 ~ 4000 revs/min.
5. the internal combustion gasoline engine natural inflow road with optimum organization piston ring according to claim 1 sprays homogeneous lean combustion controlling method, it is characterized in that: described moderate duty TPS scope is 30 ~ 60%.
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| CN102900553A (en) * | 2011-07-29 | 2013-01-30 | 阮海生 | Energy conservation and emission reduction mechanism of internal combustion dynamical system |
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2013
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Patent Citations (8)
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| CN2268816Y (en) * | 1996-03-22 | 1997-11-26 | 中国水产舟山海洋渔业公司 | combined piston ring |
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| CN2557708Y (en) * | 2002-07-24 | 2003-06-25 | 任兰敏 | Assembling piston ring |
| CN201221419Y (en) * | 2007-06-13 | 2009-04-15 | 马勒国际公司 | Piston ring for internal combustion engine piston |
| CN102374049A (en) * | 2010-07-30 | 2012-03-14 | 北汽福田汽车股份有限公司 | Combustion air-fuel ratio control method of hydrogen internal combustion engine |
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Effective date of registration: 20151020 Address after: 450000, West House, 4 floor, building 161, 2 health Road, No. 2, Jinshui District, Henan, Zhengzhou Applicant after: Ren Xiuping Address before: 450000, No. 2, Jinshui District, Henan, Huayuan Road, Zhengzhou Applicant before: Zhengzhou RLM Environmental Protection Equipment Co., Ltd. |
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