CN103287434A - Engine self-adaptive system based on vehicle operation conditions - Google Patents
Engine self-adaptive system based on vehicle operation conditions Download PDFInfo
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- CN103287434A CN103287434A CN2012100406745A CN201210040674A CN103287434A CN 103287434 A CN103287434 A CN 103287434A CN 2012100406745 A CN2012100406745 A CN 2012100406745A CN 201210040674 A CN201210040674 A CN 201210040674A CN 103287434 A CN103287434 A CN 103287434A
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Abstract
The invention discloses an engine self-adaptive system based on vehicle operation conditions, which comprises a GPS (global positioning system) navigation module, a vehicle operating data acquisition module, a whole vehicle parameter and engine working condition data storage module, a map data storage module, a data operation module, a decision-making module and a vehicle control module. The data operation module calculates a current operating state parameter of the vehicle according to vehicle operating data acquired by the vehicle operating data acquisition module and vehicle configuration parameters in the engine working condition data storage module; and then the decision-making module judges the whole vehicle dynamic requirement according to the current operating state parameter of the vehicle and the current section road information, and then acquires the corresponding engine operation parameter in the whole vehicle parameter and engine working condition data storage module, and execution is performed by the vehicle control module. According to the engine self-adaptive system based on the vehicle operation conditions, fuel saving efficacy is achieved through reasonable control of output characteristics of the engine under the premise of guarantee of vehicle dynamic property.
Description
Technical field
The present invention relates to vehicle motor control field, relate to a kind of running conditions of vehicle engine self-adaptive system in particular, it is by controlling driving engine, thereby can reach the effect that reduces the car load oil consumption under the prerequisite that does not reduce vehicle power.
Background technology
According to the dynamic response characteristic of driving engine, when throttle presented the stable state variation, the moment of torsion of driving engine and the dynamic relationship between the rotating speed were close to linearity, and its curve is one and lags behind the curve that throttle changes; When throttle presented step and changes, engine output torque moment increased, and Engine Injection Mass changes with throttle and strengthens suddenly, rises because engine speed and pressure charging system are stable state, so it can't catch up with the variation of fuel charge.Test figures shows: under 100% the throttle step, in about 5 seconds time, mixture gas overrich in the cylinder, and exist oil inflame not exclusively, oil consumption is risen and problem such as discharging variation.
In the vehicle driving process such as starting, accelerate and operating mode such as gearshift under, the driver is for the foot throttle greatly that usually raises speed as early as possible, can loosen throttle again Deng behind the vehicle arrival goal pace, the moment that operates in the engine operating condition variation like this, burning is incomplete just with the tail gas discharge can to cause great amount of fuel oil, makes vehicle oil consumption raise; And because the too fast overshoot that causes is accelerated in engine torque moment increase, so often need braking deceleration, namely increased energy dissipation; Therefore should be soft to the operation of throttle in the drive manner of economy, and emergent acceleration and sudden stop.
In view of this, the inventor causes the higher defective in-depth study of oil consumption at the bad operation of driver in the prior art, has this case to produce then.
Summary of the invention
The object of the present invention is to provide a kind of running conditions of vehicle engine self-adaptive system, thereby be implemented under the prerequisite of guaranteeing vehicle power, reduce the effect of car load oil consumption.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of running conditions of vehicle engine self-adaptive system wherein, comprising:
The GPS navigation module is used for obtaining vehicle current position information;
The vehicle operation data acquisition module, for the operating data of collection vehicle, vehicle operation data comprises vehicle current vehicle speed, engine speed, engine torque, Das Gaspedal aperture and brake pedal aperture;
Whole-car parameters and engine operating condition data memory module are used for the store car configuration parameter and corresponding to the engine operating parameter of different dynamic demand;
The map datum memory module be used for to store the map datum of vehicle operation area, and extracts current highway section road information according to the current location information that the GPS navigation module is obtained;
The data operation module calculates the current running state parameter of vehicle according to the vehicle operation data of vehicle operation data acquisition module collection, and the current running state parameter of this vehicle comprises vehicle acceleration, Das Gaspedal aperture rate of change and gear; This data operation module also in conjunction with the vehicle configuration parameter in whole-car parameters and the engine operating condition data memory module, calculates the road resistance characteristic coefficient; Judge the car load power demand in conjunction with the current running state parameter of vehicle of the current highway section road information that obtains from the map datum memory module and the calculating of data operation module again;
Decision-making module, according to the car load power demand that the data operation module calculates, the engine operating parameter in inquiry whole-car parameters and the engine operating condition data memory module is determined corresponding engine operating parameter;
Vehicle control module receives engine operating parameter and controls the output characteristic of driving engine.
Further, this system also comprises human-computer interaction module, and this human-computer interaction module is used for importing vehicle operating information for the driver, and this vehicle operating information comprises car load and line status; This data operation module calculates the car load power demand together according to vehicle operating information, current highway section road information and the current running state parameter of vehicle.
Further, this vehicle configuration parameter comprises change speed gear box gear ratios, base ratio, Vehicle preparation quality, tire rolling radius, mechanical efficiency of power transmission, vehicle rotor inertia conversion factor, air resistance coefficient and vehicle wind area.
Further, this current highway section road information comprises the gradient, pavement state, site of road attribute and real-time road.
After adopting said structure, the data operation module calculates the current running state parameter of vehicle and road resistance characteristic coefficient according to the vehicle operation data of vehicle operation data acquisition module collection and the vehicle configuration parameter in whole-car parameters and the engine operating condition data memory module among the present invention; And then judge the car load power demand by the data operation module according to the current running state parameter of vehicle and road resistance characteristic coefficient and in conjunction with current highway section road information, at last in whole-car parameters and engine operating condition data memory module, obtain corresponding engine operating parameter according to the power demand of current car load again by decision-making module, and carried out by vehicle control module.So the present invention can rationally control by the output characteristic to driving engine under the prerequisite that guarantees vehicle power, thereby reaches the effect of fuel-economizing.
Description of drawings
Fig. 1 is the structural principle block diagram that the present invention relates to a kind of running conditions of vehicle engine self-adaptive system.
Among the figure:
Engine self-adaptive system 100
GPS navigation module 1 vehicle operation data acquisition module 2
Whole-car parameters and engine operating condition data memory module 3
Map datum memory module 4 data operation modules 5
Decision-making module 6 vehicle control module 7
Human-computer interaction module 8.
The specific embodiment
In order further to explain technical scheme of the present invention, the present invention will be described in detail below by specific embodiment.
As shown in Figure 1, the structural principle block diagram of a kind of running conditions of vehicle engine self-adaptive system 100 that the present invention relates to, this engine self-adaptive system 100 comprises GPS navigation module 1, vehicle operation data acquisition module 2, whole-car parameters and engine operating condition data memory module 3, map datum memory module 4, data operation module 5, decision-making module 6 and vehicle control module 7.
This GPS navigation module 1 is used for obtaining vehicle current position information; Concrete, this GPS navigation module 1 comprises gps antenna and gps receiver, it is to adopt known method to obtain the location information of vehicle self, and this information is positioned in map datum memory module 4.
This vehicle operation data acquisition module 2, for the operating data of collection vehicle, this vehicle operation data specifically comprises vehicle current vehicle speed, engine speed, engine torque, Das Gaspedal aperture and brake pedal aperture; It can directly obtain by CAN bus communication on the car, for the vehicle that the CAN bus is not set, then needs the corresponding sensor of additional configuration to carry out data acquisition.
This whole-car parameters and engine operating condition data memory module 3 are used for the store car configuration parameter and corresponding to the engine operating parameter of different dynamic demand; Particularly, in specific embodiment, this vehicle configuration parameter comprises change speed gear box gear ratios, base ratio, Vehicle preparation quality, tire rolling radius, mechanical efficiency of power transmission, vehicle rotor inertia conversion factor, air resistance coefficient and vehicle wind area.This engine operating parameter then is the parameter corresponding to current vehicle motor, and it adopts the mode of storage in advance to arrange, and this engine operating parameter is distinguished to some extent according to different power demands.
This map datum memory module 4 be used for to store the map datum of vehicle operation area, and extracts current highway section road information according to the current location information that GPS navigation module 1 is obtained; Particularly, this current highway section road information comprises information such as the gradient, pavement state, site of road attribute and real-time road, and this site of road attribute is mainly used in identifying the urban road.
This data operation module 5, the vehicle operation data of gathering according to vehicle operation data acquisition module 2 calculates the current running state parameter of vehicle, and the current running state parameter of this vehicle comprises vehicle equivalence resistance to motion, vehicle acceleration, Das Gaspedal aperture rate of change and gear; This data operation module 5 also in conjunction with the vehicle configuration parameter in whole-car parameters and the engine operating condition data memory module 3, calculates the road resistance characteristic coefficient; Judge the car load power demand in conjunction with the current running state parameter of vehicle of the current highway section road information that obtains from map datum memory module 4 and 3 calculating of data operation module again.
This decision-making module 6, according to the car load power demand that data operation module 5 calculates, the engine operating parameter in inquiry whole-car parameters and the engine operating condition data memory module 3 is determined corresponding engine operating parameter;
This vehicle control module 7 all links to each other with driving engine with decision-making module 6, the engine operating parameter that its reception decision-making module 6 is transferred and the output characteristic of controlling driving engine.
Like this, data operation module 5 calculates the current running state parameter of vehicle and road resistance characteristic coefficient according to the vehicle operation data of vehicle operation data acquisition module 2 collections and the vehicle configuration parameter in whole-car parameters and the engine operating condition data memory module 3 among the present invention; And then judge the car load power demand by the data operation module according to the current running state parameter of vehicle and current highway section road information, at last in whole-car parameters and engine operating condition data memory module 3, obtain corresponding engine operating parameter according to the power demand of current car load by decision-making module, and carried out by vehicle control module 7.
Preferably, this engine self-adaptive system 100 also comprises human-computer interaction module 8, and this human-computer interaction module 8 is used for importing vehicle operating information for the driver, and this vehicle operating information comprises car load and line status; This data operation module 5 calculates the car load power demand together according to vehicle operating information, current highway section road information and the current running state parameter of vehicle.In addition, by this human-computer interaction module 8, can also accept driver's people for controlling, allow whole engine self-adaptive system 100 to withdraw from the self adaptation state or select to dispose corresponding engine condition according to the driver.
Describe the implementation procedure that the present invention relates to engine self-adaptive system 100 below in detail:
When vehicle travelled, the various external force of action scope vehicle can be classified as propulsive effort and resistance to motion on working direction.Vehicle resistance to motion equation of equilibrium is:
In the formula: F
tBe propulsive effort, F
fBe rolling resistance, F
wBe air resistance, F
iBe grade resistance, F
jBe resistance due to acceleration.
This formula is equivalent to:
In the formula: T
TqBe engine torque, i
gBe transmission ratio, i
0Be the main reduction gear transmitting ratio, r is radius of wheel,
Be mechanical efficiency of power transmission, δ is vehicle rotor inertia conversion factor, and m is vehicular gross combined weight, and a is vehicle acceleration, and g is acceleration due to gravity, and f is coefficient of rolling resistance, and θ is the road grade angle, and v is the speed of a motor vehicle, C
DBe air resistance coefficient, A is the vehicle wind area.
For above data formula, can convert thereof into:
λ is as the road resistance characteristic coefficient or be called the road equivalence gradient.
Wherein, engine torque T
TqAll can from the CAN network, obtain with speed of a motor vehicle v, or obtain by communicating by letter with corresponding ECU (Electrical Control Unit).For i
g, i
0, r,
, δ, C
DBe stored in advance in the whole-car parameters and engine operating condition data memory module 3 of car-mounted terminal with parameters such as A, after it also carries out smoothing processing with the speed of a motor vehicle of obtaining, can calculate acceleration/accel a by the rate of change of the speed of a motor vehicle:
T is the speed of a motor vehicle sampling interval, v
1To v
10Be the vehicle speed value of nearest 10 records, v
10It is up-to-date vehicle speed value.
In addition, because when the throttle rate of change is big, engine torque can produce sudden change equally, but vehicle is because self big inertia can't be followed the engine torque variation well, so can cause the λ that calculates bigger than normal, therefore should in use remove the data of this part, it is little and the data uniform moment are calculated namely only to be suitable for stable state throttle or throttle rate of change; Therefore Das Gaspedal aperture and the brake pedal aperture of gathering by vehicle operation data acquisition module 2 got rid of at the unusual moment of torsion in the corresponding moment and to the engine torque of remainder and carried out smoothing processing; Similarly; for gear; also has same meaning; namely by investigating current gear; if under present speed of operation; current gear mal or improper is then got rid of the reference value of calculating resistance characteristic coefficient λ this moment, and it mainly also is because inappropriate gear can cause vehicle torque parameter mal.For complete vehicle quality m, it also can be by driver's input by human-computer interaction module 8 except comprising the Vehicle preparation quality, and the load condition that this secondary line is got on the bus is taken into account.
For whole decision process, then be the resistance characteristic coefficient λ that calculates current road earlier, this resistance characteristic coefficient λ has characterized the feature of road, namely comprise the gradient, pavement state information such as (being the road resistance size), then then calculate the power demand of vehicle under the current highway section by following company:
Wherein: v value under the situation of acquiescence is one less in road speed limit and the economic speed per hour of design.Under the situation of the real-time road condition information reflection road degree of crowding, this value can change according to crowded degree, the real-time road system can propose one to the degree of crowding and describe qualitatively such as crowded or unimpeded, simultaneously quantitative description is " at present so-and-so road-section average speed of a motor vehicle 20km/h ", the speed of a motor vehicle that this moment, the v value provided for real-time road condition information, it has embodied the road degree of crowding is real-time road.
Be coefficient of reserve power, it is a definite value relevant with vehicle, its effect is to have guaranteed that vehicle has enough power to be used for accelerating, and the driving experience of choosing main consideration vehicle power relevant regulations and driver of this value guarantees that vehicle accelerating ability can be in the reasonable scope.β is the circuit coefficient of correction, and this parameter is influenced by the line status of the input information of human-computer interaction interface, and class's line of promising to undertake as cable release, arrival in limited time guarantees that by the value that increases β vehicle has more superior dynamic property.
Then be safety factor, it is used for guaranteeing that vehicle has enough power to tackle various unforeseen circumstancess.Because during design
Considered safe clearance, therefore generally speaking
, for satisfying dynamic property and security consideration, or zone that the gradient bigger bad at road condition, power can be strengthened, and makes
To guarantee the power abundance.
That calculate is the required tractive force F of vehicle according to above-mentioned
tDetermine speed ratio i according to the economic gear under each grade of vehicle speed ratio in the configuration parameter and the v speed of a motor vehicle
0, according to two equivalent equations that begin most
Calculate the T under this state
TqThe maximum engine torque demand; Again by P=F
t* v calculation engine maximum power requirement; The engine power that should finally select should satisfy the higher value in torque peak demand and the maximum power requirement.
Obtain corresponding engine operating parameter according to these demands from whole-car parameters and engine operating condition data memory module at last, and carry out by vehicle control module 7.In summary, the present invention can rationally control by the output characteristic to driving engine under the prerequisite that guarantees vehicle power, thereby reaches the effect of fuel-economizing.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present invention to its suitable variation or modification of doing.
Claims (4)
1. a running conditions of vehicle engine self-adaptive system is characterized in that, comprising:
The GPS navigation module is used for obtaining vehicle current position information;
The vehicle operation data acquisition module, for the operating data of collection vehicle, vehicle operation data comprises vehicle current vehicle speed, engine speed, engine torque, Das Gaspedal aperture and brake pedal aperture;
Whole-car parameters and engine operating condition data memory module are used for the store car configuration parameter and corresponding to the engine operating parameter of different dynamic demand;
The map datum memory module be used for to store the map datum of vehicle operation area, and extracts current highway section road information according to the current location information that the GPS navigation module is obtained;
The data operation module calculates the current running state parameter of vehicle according to the vehicle operation data of vehicle operation data acquisition module collection, and the current running state parameter of this vehicle comprises vehicle acceleration, Das Gaspedal aperture rate of change and gear; This data operation module also in conjunction with the vehicle configuration parameter in whole-car parameters and the engine operating condition data memory module, calculates the road resistance characteristic coefficient; Judge the car load power demand in conjunction with the current running state parameter of vehicle of the current highway section road information that obtains from the map datum memory module and the calculating of data operation module again;
Decision-making module, according to the car load power demand that the data operation module calculates, the engine operating parameter in inquiry whole-car parameters and the engine operating condition data memory module is determined corresponding engine operating parameter;
Vehicle control module receives engine operating parameter and controls the output characteristic of driving engine.
2. a kind of running conditions of vehicle engine self-adaptive as claimed in claim 1 system, it is characterized in that, this system also comprises human-computer interaction module, and this human-computer interaction module is used for importing vehicle operating information for the driver, and this vehicle operating information comprises car load and line status; This data operation module calculates the car load power demand together according to vehicle operating information, current highway section road information and the current running state parameter of vehicle.
3. a kind of running conditions of vehicle engine self-adaptive as claimed in claim 1 system, it is characterized in that this vehicle configuration parameter comprises change speed gear box gear ratios, base ratio, Vehicle preparation quality, tire rolling radius, mechanical efficiency of power transmission, vehicle rotor inertia conversion factor, air resistance coefficient and vehicle wind area.
4. a kind of running conditions of vehicle engine self-adaptive as claimed in claim 1 system is characterized in that this current highway section road information comprises the gradient, pavement state, site of road attribute and real-time road.
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CN112302813A (en) * | 2020-10-27 | 2021-02-02 | 东风越野车有限公司 | Power override control method for vehicle engine |
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