CN102182822A - Gear shift prompting equipment and method - Google Patents
Gear shift prompting equipment and method Download PDFInfo
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- CN102182822A CN102182822A CN2011101080781A CN201110108078A CN102182822A CN 102182822 A CN102182822 A CN 102182822A CN 2011101080781 A CN2011101080781 A CN 2011101080781A CN 201110108078 A CN201110108078 A CN 201110108078A CN 102182822 A CN102182822 A CN 102182822A
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Abstract
The invention discloses gear shift prompting equipment and a gear shift prompting method. The gear shift prompting equipment comprises an information collecting device which is used for collecting running information of a vehicle, an optimal rotation speed determining device which is connected with the information collecting device and is used for determining the optimal rotation speed of an engine according to the running information of the vehicle, an optimal gear determining device which is connected with the optimal rotation speed determining device and is used for determining the optimal gear of a gearbox of the vehicle on the basis of the optimal rotation speed, and a prompting device which is connected with the optimal gear determining device and is used for prompting a user to shift to the optimal gear.
Description
Technical field
The present invention relates to Diesel Engine Technique Field, particularly a kind of gear shift prompt facility and method that is used for diesel engine.
Background technique
In the using process of vehicle, the oil consumption of vehicle is an important problem.For a vehicle that is in the running process, present usual way is to determine that for vehicle suitable gear is to save oil consumption according to the travelling speed of vehicle, this generally needs driver to have rich experience, and rule of thumb accumulation selects to be fit to the gear of vehicle present speed.In addition, at present also the travelling speed of with good grounds vehicle automatically calculate the method for suitable gear by control system.
Yet existing these methods are not considered vehicle various concrete conditions in the process of moving, for example the universal characteristic curve of the real-time rotating speed of motor, moment of torsion, motor, external characteristic curve, a best effort point curve operation information of waiting for bus.Therefore, the current running condition of the gear that obtains according to existing method and vehicle is related effectively, thereby causes the gear validity that obtains like this not high, makes the fuel economy of vehicle lower.
Summary of the invention
At above problem, one object of the present invention is to provide a kind of gear shift prompt facility and method, it can obtain engine speed based on the vehicle practical operation situation, thereby determine to be fit to the gearbox gear of the current runnability of vehicle based on engine speed, and point out to the user, so that the user can select gear as required, thereby the fuel economy of raising vehicle is saved oil consumption.
According to a first aspect of the invention, provide a kind of gear shift prompt facility, this gear shift prompt facility can comprise: information collection apparatus is configured to collect the vehicle operation information; Optimized rotating speed is determined device, is connected with information collection apparatus, is configured to determine according to vehicle operating information the optimized rotating speed of motor; Best gear is determined device, determines that with optimized rotating speed device is connected, and is configured to determine based on optimized rotating speed the best gear of the gearbox of vehicle; And suggestion device, determine that with best gear device is connected, be configured to the best gear of user prompt.
According to one embodiment of present invention, information collection apparatus can comprise: be used for obtaining following one or the device of multinomial vehicle operating information: the universal characteristic curve of output shaft of gear-box rotating speed, engine speed, moment of torsion, the speed of a motor vehicle, motor, external characteristic curve, best effort point curve.
According to one embodiment of present invention, optimized rotating speed determines that device can comprise: the computing device that is used for the current power of calculation engine; And the obtaining device that is used for obtaining according to current power optimized rotating speed according to the universal characteristic curve of motor.
According to one embodiment of present invention, optimized rotating speed determines that device can comprise: be used for the computing device according to the current power of vehicle operating information calculations motor; The computing device that is used for the ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed; Be used for the current rotating speed of motor being defined as during more than or equal to predetermined threshold definite device of optimized rotating speed when ratio; And be used for determining the renewal moment of torsion of motor according to the external characteristic curve of motor during less than predetermined threshold and according to the current power of motor with upgrade the device that moment of torsion obtains the optimized rotating speed of motor, the ratio that wherein upgrades moment of torsion and maximum possible moment of torsion is more than or equal to predetermined threshold when ratio.
According to one embodiment of present invention, optimized rotating speed determines that device can comprise: the obtaining device that is used to obtain the acceleration of vehicle; The comparer that is used for comparison acceleration and acceleration rate threshold; The computing device that is used for the current power of calculation engine; The computing device that is used for the ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed; Be used for the current rotating speed of motor being defined as during more than or equal to predetermined threshold definite device of optimized rotating speed when ratio; And be used for determining the renewal moment of torsion of motor according to the external characteristic curve of motor during less than predetermined threshold and according to the current power of motor with upgrade the device that moment of torsion obtains the optimized rotating speed of motor, the ratio that wherein upgrades moment of torsion and maximum possible moment of torsion is more than or equal to predetermined threshold when ratio.
According to one embodiment of present invention, best gear determines that device can comprise: computing device is configured to calculate the ratio of optimized rotating speed and output shaft of gear-box rotating speed; Search device, be configured to, search candidate's gear set of gearbox according to ratio according to gearbox gear ratios constant allocation list; Obtaining device is configured to according to gearbox gear ratios constant allocation list, obtains candidate's rotating speed set of motor from candidate's gear set of gearbox; Selection device is configured to the best effort point curve according to motor, selects a rotating speed from the set of candidate's rotating speed; And definite device, be configured to and will be defined as best gear with the corresponding gear of selected rotating speed in the candidate's gear set.
According to one embodiment of present invention, best gear determines that the selection device in the device can comprise: the definite device that is used for determining the set of candidate's rotating speed and the immediate candidate's rotating speed of best effort point curve of motor; And the selection device that is used for selecting determined candidate's rotating speed from the set of candidate's rotating speed.
According to one embodiment of present invention, suggestion device can comprise: be used at the preferential device that shows best gear of information display.
According to a second aspect of the invention, provide a kind of gear shift reminding method, this method can may further comprise the steps: collect the vehicle operation information; Determine the optimized rotating speed of motor according to vehicle operating information; Based on optimized rotating speed, determine the best gear of the gearbox of vehicle; And to the best gear of user prompt.
According to one embodiment of present invention, collecting the vehicle operation information can comprise: obtain in following one or multinomial: the universal characteristic curve of output shaft of gear-box rotating speed, engine speed, moment of torsion, the speed of a motor vehicle, motor, external characteristic curve, best effort point curve.
Optimized rotating speed when according to one embodiment of present invention, determining that according to vehicle operating information motor has optimum fuel economy can comprise: according to the current power of vehicle operating information calculations motor; And obtain optimized rotating speed according to current power according to the universal characteristic curve of motor.
Optimized rotating speed when according to one embodiment of present invention, determining that according to vehicle operating information motor has optimum fuel economy can comprise: according to the current power of vehicle operating information calculations motor; The ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed; When ratio during, the current rotating speed of motor is defined as optimized rotating speed more than or equal to predetermined threshold; And when ratio during less than predetermined threshold, determine the renewal moment of torsion of motor according to the external characteristic curve of motor, and according to the current power of motor with upgrade the optimized rotating speed that moment of torsion obtains motor, the ratio that wherein upgrades moment of torsion and maximum possible moment of torsion is more than or equal to predetermined threshold.
Optimized rotating speed when according to one embodiment of present invention, determining that according to vehicle operating information motor has optimum fuel economy can comprise: the acceleration that obtains vehicle; Compare acceleration and acceleration rate threshold, if acceleration is greater than acceleration rate threshold, the current power of calculation engine then, the ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed, when ratio during more than or equal to predetermined threshold, the current rotating speed of motor is defined as optimized rotating speed, and when ratio during less than predetermined threshold, determine the renewal moment of torsion of motor according to the external characteristic curve of motor, and according to the current power of motor with upgrade the optimized rotating speed that moment of torsion obtains motor, the ratio that wherein upgrades moment of torsion and maximum possible moment of torsion is more than or equal to predetermined threshold.
According to one embodiment of present invention, determine that based on optimized rotating speed the best gear of the gearbox of vehicle can comprise: the ratio that calculates optimized rotating speed and output shaft of gear-box rotating speed; According to gearbox gear ratios constant allocation list, search candidate's gear set of gearbox according to ratio; According to gearbox gear ratios constant allocation list, obtain candidate's rotating speed set of motor from candidate's gear set of gearbox; According to the best effort point curve of motor, from the set of candidate's rotating speed, select a rotating speed; And will be defined as best gear with the corresponding gear of selected rotating speed in the candidate's gear set.
According to one embodiment of present invention, according to the best effort point curve of motor, from candidate's rotating speed set, select a rotating speed to comprise: to determine in the set of candidate's rotating speed and the immediate candidate's rotating speed of the best effort point curve of motor; And from the set of candidate's rotating speed, select determined candidate's rotating speed.
According to one embodiment of present invention, can comprise to the best gear of user prompt: the best gear of preferential demonstration in information display.
By utilizing the gear shift prompt facility of embodiment of the present invention, can point out the gearbox gear of Best Economy fuel oil under the current vehicle working condition of driver in real time, prompting driver gear shift, thus realization reduces the purpose of oil consumption.In addition, gear shift prompt facility of the present invention is simple in structure, and on original car load basis, not needing to increase any sensor can realize.
By the following description of preferred implementation to the explanation principle of the invention, and in conjunction with the accompanying drawings, other features of the present invention and advantage will be conspicuous.
Description of drawings
By below in conjunction with the description of the drawings, and along with understanding more comprehensively to of the present invention, other purposes of the present invention and effect will become clear more and easy to understand, wherein:
Fig. 1 is the schematic block diagram according to the gear shift prompt facility of one embodiment of the present of invention.
Fig. 2 is the flow chart according to the gear shift reminding method of one embodiment of the present of invention.
Fig. 3 is the flow chart according to the gear shift reminding method of an alternative embodiment of the invention.
Fig. 4 is the schematic representation according to the engine test bench characteristic curve of one embodiment of the present of invention.
In all above-mentioned accompanying drawings, identical label represents to have identical, similar or corresponding feature or function.
Embodiment
Below in conjunction with accompanying drawing the present invention is explained in more detail and illustrates.Should be appreciated that drawings and Examples of the present invention only are used for exemplary effect, be not to be used to limit protection scope of the present invention.
Fig. 1 is the schematic block diagram according to the gear shift prompt facility 100 of one embodiment of the present of invention.Gear shift prompt facility 100 shown in Figure 1 can comprise: information collection apparatus 110, optimized rotating speed determine that device 120, best gear determine device 130, suggestion device 140.
Information collection apparatus 110 can be configured to collect the vehicle operation information.In one embodiment, information collection apparatus 110 can comprise: be used for obtaining following one or multinomial device: the universal characteristic curve of output shaft of gear-box rotating speed, engine speed, moment of torsion, the speed of a motor vehicle, motor, external characteristic curve, best effort point curve.
Optimized rotating speed determines that device 120 can be connected with information collection apparatus 110, and can be configured to determine according to vehicle operating information the optimized rotating speed of motor.
In one embodiment, optimized rotating speed determines that device 120 can comprise: the device that is used for the current power of calculation engine; And the device that is used for obtaining according to current power optimized rotating speed according to the universal characteristic curve of motor.
In another embodiment, optimized rotating speed determines that device 120 can comprise: be used for the device according to the current power of vehicle operating information calculations motor; The device that is used for the ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed; Be used for the current rotating speed of motor being defined as the device of optimized rotating speed when ratio during more than or equal to predetermined threshold; And be used for when ratio during less than predetermined threshold, determine the renewal moment of torsion of motor and according to the current power of motor with upgrade the device that moment of torsion obtains the optimized rotating speed of motor, the ratio that wherein upgrades moment of torsion and maximum possible moment of torsion is more than or equal to predetermined threshold according to the external characteristic curve of motor.
In yet another embodiment, optimized rotating speed determines that device 120 can comprise: the device that is used to obtain the acceleration of vehicle; The device that is used for comparison acceleration and acceleration rate threshold; The device that is used for the current power of calculation engine; The device that is used for the ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed; Be used for the current rotating speed of motor being defined as the device of optimized rotating speed when ratio during more than or equal to predetermined threshold; And be used for when ratio during less than predetermined threshold, determine the renewal moment of torsion of motor and according to the current power of motor with upgrade the device that moment of torsion obtains the optimized rotating speed of motor, the ratio that wherein upgrades moment of torsion and maximum possible moment of torsion is more than or equal to predetermined threshold according to the external characteristic curve of motor.
Best gear determines that device 130 can determine that device 120 is connected with optimized rotating speed, and can be configured to determine based on optimized rotating speed the best gear of the gearbox of vehicle.In one embodiment, best gear determines that device 130 can comprise: computing device is configured to calculate the ratio of optimized rotating speed and output shaft of gear-box rotating speed; Search device, be configured to, search candidate's gear set of gearbox according to ratio according to gearbox gear ratios constant allocation list; Obtaining device is configured to according to gearbox gear ratios constant allocation list, obtains candidate's rotating speed set of motor from candidate's gear set of gearbox; Selection device is configured to the best effort point curve according to motor, selects a rotating speed from the set of candidate's rotating speed; And definite device, be configured to and will be defined as best gear with the corresponding gear of selected rotating speed in the candidate's gear set.
In one embodiment, best gear determines that the selection device of device 130 can comprise:
Be used for determining the device of the set of candidate's rotating speed and the immediate candidate's rotating speed of best effort point curve of motor; And the device that is used for selecting determined candidate's rotating speed from the set of candidate's rotating speed.
Suggestion device 140 can determine that device 130 is connected with best gear, and can be configured to the best gear of user prompt.In one embodiment, suggestion device 140 can comprise the device that is used at the best gear of the preferential demonstration of information display.
Should be appreciated that above-mentioned each device of the present invention can be by existing hardware, firmware, software, machine in conjunction with realizing.For example, above-mentioned each device can utilize commonly used or specific integrated circuit in the future, special digital processor, programmable logic controller (PLC) (for example on-site programmable gate array FPGA etc.) or the like realize.
Fig. 2 is the flow chart according to the gear shift reminding method of one embodiment of the present of invention.Gear shift reminding method shown in Figure 2 can utilize gear shift prompt facility shown in Figure 1 to finish.
In step 201, collect the vehicle operation information.
This step can be finished by the information collection apparatus 110 of gear shift prompt facility 100 shown in Figure 1, also can be finished by any other the suitable equipment that it may occur to persons skilled in the art that.In step 201, for example, output shaft of gear-box rotating speed, engine speed, moment of torsion, the speed of a motor vehicle, the universal characteristic curve of motor, external characteristic curve, the best effort point curve that can collect a vehicle operation information of waiting for bus.
In step 202, determine the optimized rotating speed of motor according to vehicle operating information.
This step can determine that device 120 finishes by the optimized rotating speed of gear shift prompt facility 100 shown in Figure 1, also can be finished by any other the suitable equipment that it may occur to persons skilled in the art that.
In one embodiment, can be at first according to the current power of vehicle operating information calculations calculation engine, the universal characteristic curve according to motor obtains optimized rotating speed according to current power then, thus completing steps 202.
It is abscissa that the universal characteristic curve of motor typically refers to the engine speed, with mean effective pressure or moment of torsion is y coordinate, with the parametric synthesis such as load characteristic curve, speed characteristic curve, power and oil consumption under each rotating speed of diesel engine to the curve of drawing together.Moment of torsion, fuel consumption rate and other parameter when universal characteristic curve can be read diesel engine different capacity state under each specific rotation speeds.Can observe out diesel engine optimal economic operation area from universal characteristic curve.The universal characteristic curve of motor for example can be stored among the ECU in advance.Vehicle operating information for example can comprise information such as the universal characteristic curve, external characteristic curve, best effort point curve of output shaft of gear-box rotating speed, engine speed, moment of torsion, the speed of a motor vehicle, motor.The current power of motor for example can obtain by engine speed and moment of torsion are multiplied each other.Obtain after the current power of motor, can obtain the engine optimum rotating speed by the best effort point curve in the inquiry universal characteristic curve.Fig. 4 schematically shows the best effort point curve of motor.For example, when the best effort point curve is the curve of motor when having optimal fuel economy, optimized rotating speed that then can be when inquiring about this curve and obtain motor and have optimal fuel economy; When the best effort point curve is the curve of motor when having best power performance, optimized rotating speed that then can be when inquiring about this curve and obtain motor and have best power performance.
In second embodiment, step 202 can be finished by following process: at first according to the current power of vehicle operating information calculations motor; The ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed then; When ratio during, the current rotating speed of motor is defined as optimized rotating speed more than or equal to predetermined threshold; And, when ratio during less than predetermined threshold, determine the renewal moment of torsion of motor according to the external characteristic curve of motor, and according to the current power of motor with upgrade the optimized rotating speed that moment of torsion obtains motor, the ratio that wherein upgrades moment of torsion and maximum possible moment of torsion is more than or equal to predetermined threshold.Below with reference to Fig. 3 this embodiment is described in detail.The external characteristic curve of motor typically refers to and makes motor send the engine speed characteristic curve of measuring under the situation of peak output under the best working state of motor.
In the 3rd embodiment, step 202 can be finished by following process: the acceleration that at first obtains vehicle; The acceleration and the predefined acceleration rate threshold that obtain are compared, if acceleration is greater than acceleration rate threshold, then all the other handle with second embodiment similar: current power that for example can calculation engine, the ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed, when ratio is defined as optimized rotating speed with the current rotating speed of motor during more than or equal to predetermined threshold, and determine the renewal moment of torsion of motor during less than predetermined threshold according to the external characteristic curve of motor when ratio, and according to the current power of motor with upgrade the optimized rotating speed that moment of torsion obtains motor, the ratio that wherein upgrades moment of torsion and maximum possible moment of torsion is more than or equal to predetermined threshold.
In step 203,, determine the best gear of the gearbox of vehicle based on optimized rotating speed.
This step can determine that device 130 finishes by the best gear of gear shift prompt facility 100 shown in Figure 1, also can be finished by any other the suitable equipment that it may occur to persons skilled in the art that.
In one embodiment, can at first calculate the ratio of optimized rotating speed and output shaft of gear-box rotating speed; According to gearbox gear ratios constant allocation list, search candidate's gear set of gearbox according to ratio; According to gearbox gear ratios constant allocation list, obtain candidate's rotating speed set of motor from candidate's gear set of gearbox; According to the best effort point curve of motor, from the set of candidate's rotating speed, select a rotating speed; And, will be defined as best gear with the corresponding gear of selected rotating speed in the candidate's gear set, thus completing steps 203.
In another embodiment, the process of performing step 203 is except each step of carrying out the foregoing description, can also from the set of candidate's rotating speed, select in the process of a rotating speed at best effort point curve according to motor, with the immediate candidate's rotating speed of the best effort point curve of motor, from the set of candidate's rotating speed, select determined candidate's rotating speed then at first definite candidate's rotating speed set.Below with reference to Fig. 3 this embodiment is described in detail.
In step 204, to the best gear of user prompt.
This step can be finished by the suggestion device 140 of gear shift prompt facility 100 shown in Figure 1, also can be finished by any other the suitable equipment that it may occur to persons skilled in the art that.
In step 204, for example can in information display, preferentially show described best gear, thereby make the user can learn rapidly which gear the best gear of current vehicle is, so that the user carries out transforming gear, thereby save fuel oil, reduction oil consumption.Information display can have various ways, and for example information display can be: LCD, VFD, OLED etc., for example information display can be plane demonstration or new line display mode etc. again.
Then, the flow process of Fig. 2 finishes.
Fig. 3 is the flow chart according to the gear shift reminding method of an alternative embodiment of the invention.Embodiment shown in Figure 3 is the specific implementation to gear shift reminding method of the present invention, those skilled in the art should be appreciated that fully that the embodiment of Fig. 3 only is exemplary and not restrictive for the present invention, gear shift reminding method of the present invention and equipment are not limited only to the object lesson that this specification provides, but can comprise any mode of execution that those skilled in the art can expect according to the present invention.
In step 301, collect the vehicle operation information.
As previously mentioned, the vehicle operating information among the present invention for example can comprise the information such as universal characteristic curve, external characteristic curve, best effort point curve of output shaft of gear-box rotating speed, engine speed, moment of torsion, the speed of a motor vehicle, motor.
In step 302, according to the current power of vehicle operating information calculations motor.
According to the vehicle operating information that step 301 obtains, can obtain the current rotating speed and the current torque of motor, thereby can obtain the current power of motor by the current rotating speed of motor and current torque are multiplied each other.Those skilled in the art also can obtain the current power of motor according to related domain other known technology means commonly used, and are not limited to specific implementation disclosed in this invention.
In the present embodiment, the current torque with motor is designated as M
C, and current rotating speed is designated as n
C, the present output power that can obtain motor is:
P
C＝M
C×n
C (1)
In step 303, the torque ratio of maximum possible moment of torsion under the current torque of calculation engine and the current rotating speed.
Moment of torsion generally is the size that mean engine drives the power of drive shaft turns.Usually, under the condition that power is fixed, moment of torsion and the engine speed relation of being inversely proportional to, the fast more moment of torsion of rotating speed is more little, and the slow more moment of torsion of rotating speed is big more.
The maximum possible moment of torsion for example can obtain according to the universal characteristic curve of motor under the current rotating speed.In the present embodiment, the maximum possible moment of torsion of motor under current rotating speed is designated as M
Cmax, and the ratio of maximum possible moment of torsion under the current torque of motor and the current rotating speed is designated as R
M, then
R
M＝M
C/M
Cmax (2)
In step 304, judge that whether the torque ratio that obtains from step 303 is less than predetermined threshold.
Can obtain predetermined threshold in several ways, for example can rule of thumb be worth in advance the suitable preset value of specifying, obtaining, can realize according to calculated with mathematical model or those skilled in the art according to technology at present about ratio.
In one embodiment, predetermined threshold for example can be 60%.This moment can be to the ratio R that obtains from step 303
MCompare with predetermined threshold, if ratio R
MLess than predetermined threshold, then proceed to step 305; If ratio R
MBe not less than (also promptly being greater than or equal to) predetermined threshold, then proceed to step 306.
In step 305, determine the renewal moment of torsion of motor according to the external characteristic curve of motor, and according to the current power of motor with upgrade the optimized rotating speed that moment of torsion obtains motor.
As the torque ratio R that obtains from step 303
MDuring less than predetermined threshold, enter into this step from step 304, represent that the present engine Rate of load condensate is lower this moment, needs to reduce engine speed.Can obtain one and upgrade moment of torsion (being designated as M) according to the external characteristic curve of motor, wherein should upgrade the ratio R of maximum possible moment of torsion under moment of torsion and the current rotating speed
MGreater than the predetermined threshold in the step 304.The external characteristic curve of motor for example can obtain engine configurations information and further obtains by reading the CAN bus, and Fig. 4 schematically shows the external characteristic curve of motor.
According to the motor current power P that obtains in step 302
CWith renewal moment of torsion M, it is as follows to obtain optimized rotating speed (being designated as n):
n＝P
C/M (3)
In step 306, the current rotating speed of motor is defined as optimized rotating speed.
In step 307, calculate the rotating speed ratio of optimized rotating speed and output shaft of gear-box rotating speed.
In an example, the rotating speed ratio of optimized rotating speed and output shaft of gear-box rotating speed can be designated as i, wherein i=n/n
o, n
oBe the output shaft of gear-box rotating speed, it for example can obtain by vehicle operating information.
In step 308, according to gearbox gear ratios constant allocation list, the rotating speed ratio that obtains according to step 307 is searched candidate's gear set of gearbox.
Gearbox gear ratios constant allocation list for example can the configuration information when vehicle dispatches from the factory be lived and is obtained the file specification, and it has described the input speed (and rotating speed of motor) and the ratio of output speed and the corresponding relation of each gear of the gearbox of vehicle.In an example, suppose that the gearbox of vehicle has 5 gears, the gearbox gear ratios of wherein the most high-grade (for example being the 5th grade) is 1: 1, the 4th grade to the 1st grade for example is 1: 1.27,1: 1.27 successively
2, 1: 1.27
3, 1: 1.27
4
Suppose that the rotating speed ratio that obtains is 1: 1.2 in step 307, it is comparatively approaching then can to obtain the 4th grade and the 5th grade gearbox gear ratios and rotating speed ratio 1: 1.2 separately in step 308, therefore can add candidate's gear to the 4th grade and the 5th grade and gather, as the member of this set.
In step 309,, obtain candidate's rotating speed set of motor from candidate's gear set of gearbox according to gearbox gear ratios constant allocation list.
At first can obtain the pairing candidate's rotating speed of each candidate's gear in the candidate's gear set according to gearbox gear ratios constant allocation list, then can be with the member of these candidate's rotating speeds as the set of candidate's rotating speed.
In step 310,, from the set of candidate's rotating speed, select a rotating speed according to the best effort point curve of motor.
In this step, can at first determine in the candidate's rotating speed set and the immediate candidate's rotating speed of the best effort point curve of motor, from the set of candidate's rotating speed, select this to wait immediate candidate's rotating speed then.
In step 311, will be defined as best gear with the corresponding gear of selected rotating speed in the candidate's gear set.
Because the set of candidate's gear is according to gearbox gear ratios constant allocation list one to one with the set of candidate's rotating speed, therefore according to gathering selected candidate's rotating speed from candidate's rotating speed in step 310, can determine corresponding with it candidate's gear in the set of candidate's gear, and this candidate's gear is defined as best gear.
In step 312, to the best gear of user prompt.
This step and step 204 are similar, do not repeat them here.
Then, the flow process of Fig. 3 finishes.
Gear shift prompt facility of the present invention and method can be used for engine control system, for example state iii or the above control system of state iii.State iii and the above electrical control system for engine of state iii that at present domestic all commercial car (truck) are used all have CAN bus message function of exchange, and all follow the regulation of SAE J1939 communications protocol, so the present invention has wider Applicable scope.The present invention can communicate with Engine ECU, combination instrument and entire car controller on car load, is used for demonstration of combination instrument information and gearbox gear-shift control use.
Gear shift prompt facility of the present invention and method can be used for the vehicle in manual transmission, can point out the gearbox gear of Best Economy fuel oil under the current vehicle working condition of driver in real time by gear shift prompt facility of the present invention and method, prompting driver gear shift, thus realization reduces the purpose of oil consumption.Gear shift prompt facility of the present invention is simple in structure, and on original car load basis, not needing to increase any sensor can realize.In addition, the gearbox gear CAN bus message that gear shift prompt facility of the present invention and method can outputting standards is bought car in installments and is gone up other electronic control units and use.
The present invention can realize in the combination of hardware, firmware, software or software and hardware.Hardware can utilize specific integrated circuit, programmable logic controller (PLC) to realize; Software section can be stored in the storage, and by suitable instruction execution system, for example microprocessor, personal computer (PC) or large scale computer are carried out.
Should be noted that for the present invention is more readily understood top description has been omitted to be known for a person skilled in the art and may to be essential some ins and outs more specifically for realization of the present invention.
The purpose that specification of the present invention is provided is in order to illustrate and to describe, rather than is used for exhaustive or limits the invention to disclosed form.For those of ordinary skill in the art, many modifications and changes all are conspicuous.
Therefore; selecting and describing mode of execution is in order to explain principle of the present invention and practical application thereof better; and those of ordinary skills are understood, under the prerequisite that does not break away from essence of the present invention, all modifications and change all fall within protection scope of the present invention defined by the claims.
Claims (16)
1. gear shift prompt facility is characterized in that comprising:
Information collection apparatus is configured to collect the vehicle operation information;
Optimized rotating speed is determined device, is connected with described information collection apparatus, is configured to determine according to described vehicle operating information the optimized rotating speed of motor;
Best gear is determined device, determines that with described optimized rotating speed device is connected, and is configured to determine based on described optimized rotating speed the best gear of the gearbox of described vehicle; And
Suggestion device determines that with described best gear device is connected, and is configured to the described best gear of user prompt.
2. according to the equipment of claim 1, it is characterized in that described information collection apparatus comprises:
Be used for obtaining following one or multinomial device: the universal characteristic curve of output shaft of gear-box rotating speed, engine speed, moment of torsion, the speed of a motor vehicle, motor, external characteristic curve, best effort point curve.
3. according to the equipment of claim 1, it is characterized in that described optimized rotating speed determines that device comprises:
Be used to calculate the computing device of the current power of described motor; And
Be used for obtaining according to described current power the obtaining device of optimized rotating speed according to the universal characteristic curve of described motor.
4. according to the equipment of claim 1, it is characterized in that described optimized rotating speed determines that device comprises:
Be used for computing device according to the current power of the described motor of described vehicle operating information calculations;
Be used to calculate the computing device of the ratio of maximum possible moment of torsion under the current torque of described motor and the current rotating speed;
Be used for the current rotating speed of described motor being defined as during more than or equal to predetermined threshold definite device of optimized rotating speed when described ratio; And
Be used for determining the renewal moment of torsion of motor and the device that according to current power and the described renewal moment of torsion of described motor obtain the optimized rotating speed of described motor according to the external characteristic curve of described motor when described ratio during less than predetermined threshold, the ratio of wherein said renewal moment of torsion and described maximum possible moment of torsion is more than or equal to predetermined threshold.
5. according to the equipment of claim 1, it is characterized in that described optimized rotating speed determines that device comprises:
Be used to obtain the obtaining device of the acceleration of vehicle;
The comparer that is used for more described acceleration and acceleration rate threshold;
Be used to calculate the computing device of the current power of described motor;
Be used to calculate the computing device of the ratio of maximum possible moment of torsion under the current torque of described motor and the current rotating speed;
Be used for the current rotating speed of described motor being defined as during more than or equal to predetermined threshold definite device of optimized rotating speed when described ratio; And
Be used for determining the renewal moment of torsion of motor and the device that according to current power and the described renewal moment of torsion of described motor obtain the optimized rotating speed of described motor according to the external characteristic curve of described motor when described ratio during less than predetermined threshold, the ratio of wherein said renewal moment of torsion and described maximum possible moment of torsion is more than or equal to predetermined threshold.
6. according to the equipment of claim 1, it is characterized in that described best gear determines that device comprises:
Computing device is configured to calculate the ratio of described optimized rotating speed and output shaft of gear-box rotating speed;
Search device, be configured to, search candidate's gear set of gearbox according to described ratio according to gearbox gear ratios constant allocation list;
Obtaining device is configured to according to gearbox gear ratios constant allocation list, obtains candidate's rotating speed set of motor from candidate's gear set of described gearbox;
Selection device is configured to the best effort point curve according to motor, selects a rotating speed from described candidate's rotating speed set; And
Determine device, be configured to and be defined as best gear with the corresponding gear of selected rotating speed in the set of described candidate's gear.
7. according to the equipment of claim 6, it is characterized in that described selection device comprises:
Be used for determining definite device of described candidate's rotating speed set and the immediate candidate's rotating speed of best effort point curve of described motor; And
Be used for selecting the selection device of determined candidate's rotating speed from described candidate's rotating speed set.
8. according to the equipment of claim 1, it is characterized in that described suggestion device comprises:
Be used at the preferential device that shows described best gear of information display.
9. gear shift reminding method comprises:
Collect the vehicle operation information;
Determine the optimized rotating speed of motor according to described vehicle operating information;
Based on described optimized rotating speed, determine the best gear of the gearbox of described vehicle; And
To the described best gear of user prompt.
10. method is according to Claim 8 wherein collected the vehicle operation information and is comprised: obtains in following one or multinomial: the universal characteristic curve of output shaft of gear-box rotating speed, engine speed, moment of torsion, the speed of a motor vehicle, motor, external characteristic curve, best effort point curve.
11. according to the method for claim 9, the optimized rotating speed when wherein determining that according to described vehicle operating information motor has optimum fuel economy comprises:
Current power according to the described motor of described vehicle operating information calculations; And
Universal characteristic curve according to described motor obtains optimized rotating speed according to described current power.
12., wherein determine that according to described vehicle operating information the optimized rotating speed of motor comprises according to the method for claim 9:
Current power according to the described motor of described vehicle operating information calculations;
Calculate the ratio of maximum possible moment of torsion under the current torque of described motor and the current rotating speed;
When described ratio during, the current rotating speed of described motor is defined as optimized rotating speed more than or equal to predetermined threshold; And
When described ratio during less than predetermined threshold, determine the renewal moment of torsion of motor according to the external characteristic curve of described motor, and the optimized rotating speed that obtains described motor according to the current power and the described renewal moment of torsion of described motor, the ratio of wherein said renewal moment of torsion and described maximum possible moment of torsion is more than or equal to predetermined threshold.
13., wherein determine that according to described vehicle operating information the optimized rotating speed of motor comprises according to the method for claim 9:
Obtain the acceleration of vehicle;
More described acceleration and acceleration rate threshold are if described acceleration is greater than acceleration rate threshold, then
Calculate the current power of described motor,
Calculate the ratio of maximum possible moment of torsion under the current torque of described motor and the current rotating speed,
When described ratio during more than or equal to predetermined threshold, the current rotating speed of described motor is defined as optimized rotating speed, and
When described ratio during less than predetermined threshold, determine the renewal moment of torsion of motor according to the external characteristic curve of described motor, and the optimized rotating speed that obtains described motor according to the current power and the described renewal moment of torsion of described motor, the ratio of wherein said renewal moment of torsion and described maximum possible moment of torsion is more than or equal to predetermined threshold.
14., wherein determine that based on described optimized rotating speed the best gear of the gearbox of described vehicle comprises according to the method for claim 9:
Calculate the ratio of described optimized rotating speed and output shaft of gear-box rotating speed;
According to gearbox gear ratios constant allocation list, search candidate's gear set of gearbox according to described ratio;
According to gearbox gear ratios constant allocation list, obtain candidate's rotating speed set of motor from candidate's gear set of described gearbox;
According to the best effort point curve of motor, from described candidate's rotating speed set, select a rotating speed; And
To be defined as best gear with the corresponding gear of selected rotating speed in the set of described candidate's gear.
15. the method for claim 14 wherein according to the best effort point curve of motor, selects a rotating speed to comprise from described candidate's rotating speed set:
Determine in the set of described candidate's rotating speed and the immediate candidate's rotating speed of the best effort point curve of described motor; And
From described candidate's rotating speed set, select determined candidate's rotating speed.
16. the method for claim 9 wherein comprises to the described best gear of user prompt:
The described best gear of preferential demonstration in information display.
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