CN212890301U - Fuel-saving gear shifting reminding system based on driver intention - Google Patents
Fuel-saving gear shifting reminding system based on driver intention Download PDFInfo
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- CN212890301U CN212890301U CN202021639479.0U CN202021639479U CN212890301U CN 212890301 U CN212890301 U CN 212890301U CN 202021639479 U CN202021639479 U CN 202021639479U CN 212890301 U CN212890301 U CN 212890301U
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Abstract
A fuel-saving gear-shifting reminding system based on driver intention comprises a detection module for detecting the current gear, the opening degree of an accelerator and the speed of a vehicle, a single chip microcomputer for judging whether fuel-saving gear-shifting is needed or not and a reminding assembly for reminding lifting gear-shifting, wherein the detection module and the reminding assembly are connected with the single chip microcomputer; the detection module comprises a vehicle speed sensor, an accelerator opening sensor and a gear detector, wherein the vehicle speed sensor is arranged on a fixed part of a wheel, a main speed reducer or a transmission. The utility model discloses establish speed sensor, throttle opening sensor and keep off the position detector, judge from the vehicle present keep off the position, throttle opening and this three aspect of the speed of a motor vehicle whether the vehicle need the lift to keep off and remind the driver, can reduce fuel consumption well, the energy can be saved fully considers the fuel characteristic of engine, promotes fuel economy, alleviates driving fatigue.
Description
Technical Field
The utility model relates to an intelligence warning system, in particular to warning system that shifts economizes on fuel based on driver's intention.
Background
When the driver drives in the manual gear, a novice driver can step on a large accelerator in a low gear to cause a large accelerator opening, and the fuel economy waste caused by a small load rate is quite large. Particularly, in the driving process, the relation between gears and the vehicle speed is not well processed, the rotating speed of an engine and the instantaneous oil consumption on an instrument cannot be observed, and the fuel oil waste is often caused. There is a need for a shift reminder assembly that reduces fuel consumption.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art not enough, provide a warning system that shifts that economizes on fuel based on driver's intention and engine fuel characteristic.
The utility model aims to solve the technical problem that the technical scheme realizes through following, the utility model relates to a fuel-saving gear shifting reminding system based on driver's intention, which is characterized in that the system comprises a detection module for detecting the current gear, the accelerator opening and the vehicle speed of a vehicle, a singlechip for judging whether fuel-saving gear shifting is needed or not, and a reminding component for reminding lifting gear shifting, wherein the detection module and the reminding component are both connected with the singlechip; the detection module comprises a vehicle speed sensor, an accelerator opening sensor and a gear detector which are connected with the single chip microcomputer, and the vehicle speed sensor is arranged on a fixed part of a wheel or a main speed reducer and a transmission.
Preferably, the accelerator opening sensor comprises a contact arranged on an accelerator pedal and an adjustable resistor connected with the single chip microcomputer, the contact is in sliding fit with the adjustable resistor, and the adjustable resistor is connected with the single chip microcomputer through an A/D conversion module.
Preferably, the system is provided with a memory card connected with a vehicle central control system, and the singlechip is provided with an identification module connected with the memory card, a vehicle speed comparison module, a gear shifting vehicle speed acquisition module and a signal output module connected with the reminding assembly;
the memory card is used for storing the obtained up-down gear speed, a corresponding speed comparison program and a corresponding output program;
the identification module is used for judging whether the opening of the accelerator is larger than or equal to 75 percent; if yes, judging that the vehicle is in the stages of speed acceleration, overspeed and climbing, mainly aiming at the intention of a driver, and not carrying out gear shifting reminding; if not, taking the fuel economy of the whole vehicle as the main point to make a gear shifting prompt;
the gear shifting vehicle speed acquisition module is used for calculating a fuel consumption curve of a current gear and a next gear of the current gear under the same accelerator opening according to a relation among engine economy, vehicle structure parameters and environmental conditions and the obtained fuel consumption of the whole vehicle, and the intersection point of the two curves is a gear shifting point; selecting a gear-up or gear-down speed from the memory card by combining the current gear and the acceleration or deceleration working condition;
the vehicle speed comparison module is used for reading the vehicle speed of the current gear acquired by the vehicle speed sensor, and comparing the vehicle speed with the gear shifting vehicle speed acquired by combining the current acceleration or deceleration working condition and the gear shifting curve in a comparison program in a program storage area in the singlechip;
the signal output module is used for sending the corresponding level signal processed by the singlechip to the reminding component, generating a corresponding reminding mode and ending the program; if not, no voice prompt is generated, and the vehicle speed and the gear are continuously monitored.
Preferably, the reminding assembly comprises a voice prompting device and a lifting gear prompting lamp, the voice prompting device is connected with an amplifier, and the lifting gear prompting lamp is connected with the single chip microcomputer through a lifting gear prompting lamp driving circuit.
Preferably, the voice prompt device is provided with a voice chip with an embedded voice chip pin, and the lifting gear prompt lamp is an LED indicating lamp and comprises a gear-up indicating lamp and a gear-down indicating lamp.
Preferably, the single chip microcomputer is an STM32 single chip microcomputer, and the voice chip is a SYN6288 Chinese voice synthesis chip.
Compared with the prior art, the utility model discloses consider the influence of opportunity of shifting to economizing on fuel from engine fuel consumption rate, through setting up speed sensor, throttle opening sensor and gear detector, judge whether the vehicle needs to go up and down to shift gear to remind the driver from these three aspects of vehicle current gear, throttle opening and speed of a motor vehicle, can reduce fuel consumption well, the energy can be saved; through establishing voice prompt device and lift fender warning light, not only the pronunciation chip can be timely warning, simultaneously, the lift keeps off the opportunity that the pilot lamp colour was more directly perceived to indicate the driver to shift gears, reduces the consumption of fuel, can alleviate the driver and pay close attention to the tired degree of panel boards such as speed of a motor vehicle often, improves driving experience.
Drawings
Fig. 1 is a schematic diagram of the fuel-saving gear-shifting reminding system based on the intention of the driver of the present invention;
FIG. 2 is a device diagram of the fuel-saving shift reminding system based on the intention of the driver of the present invention;
FIG. 3 is a flow chart of the fuel saving shift reminding system based on the intention of the driver according to the present invention;
FIG. 4 is a schematic diagram of an accelerator opening sensor;
FIG. 5 is a schematic diagram of a shift indicator light;
FIG. 6 is a graph of an engine load characteristic;
FIG. 7 is a graphical illustration of hourly fuel consumption versus speed.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings, so as to enable those skilled in the art to further understand the present invention, without constituting a limitation to the right of the present invention.
Referring to fig. 1-5, the fuel-saving gear-shifting reminding system based on the intention of a driver comprises a detection module for detecting the current gear, the opening degree of an accelerator and the speed of a vehicle, a single chip microcomputer for judging whether fuel-saving gear-shifting is needed or not and a reminding assembly for reminding lifting gear-shifting, wherein the detection module and the reminding assembly are both connected with the single chip microcomputer; the detection module comprises a vehicle speed sensor, an accelerator opening sensor and a gear detector which are connected with the singlechip,
the speed sensor has three forms of reed switch, electromagnetic and Hall, and is mounted on the part of wheel which does not rotate with the wheel or main speed reducer and speed variator, and the signal input end of the sensor and the single chip is connected by signal line;
before the gear detector is installed, a gear needs to be placed in a neutral gear, the magnet is fixed on the gear lever, the center of the magnet needs to be on the same horizontal position with the center of the gear detector, and the normal direction of the center of the magnet is consistent with the longitudinal central axis of the gear detector and is on the same straight line with the center of the gear detector; the gear detector is a DW01 gear detector or a DW02 gear detector, the gear detector detects the current gear of the vehicle, the accelerator opening sensor detects the accelerator opening, and the vehicle speed sensor detects the acceleration (judges whether the acceleration or the deceleration is carried out, and decides the gear-up or the gear-down); with signal input to STM32 singlechip, speed sensor installs on the fixed part of wheel or final drive, derailleur, and the fender position detector dress is on the gear lever, the singlechip model is STM32 singlechip, and the STM32 singlechip can carry out arrangement information, operation, comparison to can be to final signal output's microcomputer, speed sensor and fender position detector also can adopt among the prior art open or any kind of product that can realize corresponding function on the market.
The accelerator opening sensor comprises a contact arranged on an accelerator pedal and an adjustable resistor connected with the single chip microcomputer, the contact is in sliding fit with the adjustable resistor, the adjustable resistor is connected with the single chip microcomputer through an A/D conversion module, the contact is connected with the adjustable resistor to achieve accelerator opening measurement, namely, the resistance value of the adjustable resistor is changed through the contact at different positions of the adjustable resistor, so that an electric signal on the adjustable resistor is changed, and an accelerator opening electric signal obtained from the adjustable resistor is connected with a signal input end of the single chip microcomputer after passing through the A/D conversion module.
The system is provided with a memory card connected with a vehicle central control system, and the singlechip is provided with an identification module connected with the memory card, a vehicle speed comparison module, a gear shifting vehicle speed acquisition module and a signal output module connected with the reminding assembly;
the memory card is used for storing the up-down gear speed (the subsequent description of the gear shifting speed acquisition principle) obtained by calculation, a corresponding speed comparison program and a corresponding output program;
the identification module is used for judging whether the opening of the accelerator is larger than or equal to 75 percent; if yes, judging that the vehicle is in the stages of speed acceleration, overspeed and climbing, mainly aiming at the intention of a driver, and not carrying out gear shifting reminding; if not, taking the fuel economy of the whole vehicle as the main point to make a gear shifting prompt;
the gear shifting vehicle speed acquisition module is used for calculating a fuel consumption curve of a current gear and a next gear of the current gear under the same accelerator opening according to a relation among engine economy, vehicle structure parameters and environmental conditions and the obtained fuel consumption of the whole vehicle, and the intersection point of the two curves is a gear shifting point; selecting a gear-up or gear-down speed from the memory card by combining the current gear and the acceleration or deceleration working condition;
the vehicle speed comparison module is used for reading the vehicle speed of the current gear acquired by the vehicle speed sensor, and comparing the vehicle speed with the gear shifting vehicle speed acquired by combining the current acceleration or deceleration working condition and the gear shifting curve in a comparison program in a program storage area in the singlechip;
if the conditions are met, the signal output module sends a corresponding level signal to the pins of the embedded voice chip through a comparison program written in the STM32 singlechip to generate a corresponding gear shifting voice prompt and a low level excitation gear-up/down prompt lamp, and the program is ended; if the current signal is not satisfied, the corresponding pin of the single chip generates a low level, the voice prompt is not generated, and the vehicle speed and the gear are continuously monitored.
The reminding assembly comprises a voice reminding device and a lifting gear reminding lamp, the voice reminding device is connected with an amplifier, and the lifting gear reminding lamp is connected with the single chip microcomputer through a lifting gear reminding lamp driving circuit; the voice prompt device is provided with a voice chip with an embedded voice chip pin, the type of the voice chip is a SYN6288 Chinese voice synthesis chip, the SYN6288 Chinese voice synthesis chip is a chip with a solidified language, voice prompt can be generated by giving an excitation level, the lifting gear prompt lamp is an LED lamp and comprises a gear-up indicator lamp and a gear-down indicator lamp, the colors are different, and the gear-up prompt lamp is a red indicator lamp and is lightened; when the gear is down-shifted, the green indicator light is turned on; and the single chip microcomputer is used for low level input;
after the automobile starts at the accelerated speed a, the speed of the engine is different at different moments, the speed sensor timely transmits a speed signal to the single chip microcomputer, the single chip microcomputer judges whether the conditions of acceleration and climbing are met or not through an accelerator signal (greater than or equal to 75%), then the conditions are compared with the speed of the gear shifting under each accelerator and gear stored in the memory card, the conclusion whether the gear shifting is needed or not is obtained, the voice chip sends out voice signals, and the LED up-down gear prompting lamp displays the prompting.
The utility model discloses in the speed of a motor vehicle of shifting acquire the principle and do:
1. the method researches the gear shifting characteristic of the optimal oil consumption under the driving state with unchanged acceleration when the position of an accelerator pedal is unchanged. The objective function means that when the in-situ starting continuous gear shifting position is accelerated to a certain required vehicle speed U, the total oil consumption Q should be minimum. The relationship between the hourly fuel consumption Qt of the engine and the fuel consumption Q (kg) of the vehicle is
When the acceleration takes a constant value, set
Then the calculation of fuel consumption can be obtained:
as can be seen from the above equation, minimizing the fuel consumption means minimizing the integral result of the equation, that is, minimizing the area enclosed by the fuel consumption curve and the horizontal axis when the same accelerator is on.
Firstly, the characteristics of the fuel oil of the engine are analyzed and known
Wherein eta t is mechanical transmission efficiency; ig is the transmission ratio of the transmission; i0 is a main reduction ratio; rw is the wheel radius, m; ft is the traction force of the automobile, N; te is engine output torque,N·m
Second, the load characteristic of the engine is the fuel consumption rate geAnd power PeFig. 6 shows that fuel consumption in a certain gear is first decreased and then increased.
According to the engine principle, the power Pe can be fitted to a function of the engine speed ne and the throttle opening beta, i.e. P, using bench test datae＝Pe(ne，β)
The specific fuel consumption of each gear at a given throttle is a function of the speed of travel, which is usually taken as a quadratic function gen＝Aenu2+Benu+Cen(4) (in the formula A)en、Ben、CenAre coefficients of fuel consumption rate function
Output torque Te (f) (ne) of the engine is generally a quadratic curve (ne is engine speed) which can be fitted from dynamic test values
Ten＝Cet+Betne+Aetne 2＝Ct+Btu+Atu2 (5)
In the formula, Cet, Bet, Aet, Ct, Bt, At are fitting coefficients, respectively, and the function of each gear with respect to the running speed u under a certain throttle, that is, the throttle opening is fixed, the hour fuel consumption Qt is only related to the gear and the running speed u, as shown in fig. 7 below.
As can be seen from fig. 7, in order to ensure the best fuel economy of the vehicle, on the hourly fuel consumption curve, the intersection point (e.g., point C) of the fuel consumption curves of two adjacent gears under the same accelerator is the shift point of the vehicle with the best fuel economy under the driving condition.
2. Solving the speed of the gear upshift point:
namely, it is
(k is the transmission ratio of two adjacent gears)
By sorting the equations (4), (5) and (6), the following quartic equation can be obtained:
Au4+Bu3+Cu2+Du+E＝0 (7)
wherein A, B, C, D, E is the coefficient of the equation, and is the function of the automobile structure parameter, the driving environment parameter and the vehicle acceleration.
From the above analysis, it can be concluded that the hour fuel consumption Qt will only be determined by the vehicle driving speed u on the premise that the accelerator opening β is constant, and thus an optimal vehicle speed is found by fitting the hour fuel consumption curves of two adjacent gears respectively so that the total fuel consumption of the vehicle is the lowest, and the vehicle speed is the optimal vehicle speed.
Downshift point vehicle speed: and then calculating a downshift point, wherein the vehicle speed of the downshift point is the difference value between the vehicle speed of the upshift point of the gear and the first numerical value, and the value of the first numerical value can be 2-6km/h (the first numerical value is set to avoid a gear shifting reminding cycle), and the vehicle speed of the downshift point is required to be the minimum vehicle speed of the current gear, so that engine flameout is avoided. And fitting the obtained downshift points into a relation curve of the accelerator changing along with the vehicle speed, wherein the relation curve is the downshift curve of the current gear to the previous gear.
Taking a 6-gear manually-driven automobile as an example, the working process is as follows without considering the reverse gear condition:
1. firstly, whether the opening degree of the accelerator is more than or equal to 75 percent is detected, if so, the single chip microcomputer generates a low level signal or does not generate any signal excitation through an edited program. Otherwise, the following operations are carried out:
2. during acceleration: at a certain throttle opening
Firstly, when the driving speed of the vehicle in the 1-gear is more than or equal to the gear shifting speed of 1-2, the single chip gives a high level to excite a pin of an embedded voice chip, the chip can send a voice prompt of 'please shift the gear to the 2-gear', and a gear-shifting red light is lightened;
when the vehicle runs in the 2-gear, when the vehicle speed is larger than or equal to the 2-3 gear shifting vehicle speed, the single chip gives a high level to excite the pin of the embedded voice chip, the chip can send out a voice prompt of 'please shift the gear to the 3-gear', and the shift-up red light is turned on;
when the vehicle runs in the gear, when the speed is not less than 3-4 of the gear shifting speed, the single chip gives a high level to excite the embedded voice chip pin, the chip can send out a voice prompt of 'please shift the gear to 4 gears', and the gear-shifting red light is turned on;
fourthly, when the vehicle runs in the 4-gear, when the speed is larger than or equal to the 4-5 gear shifting speed, the single chip gives a high level to excite the pin of the embedded voice chip, the chip can send out a voice prompt of 'please shift the gear to the 5-gear', and the shift-up red light is lightened;
3. during deceleration:
firstly, when the vehicle runs in a 5-gear state and the vehicle speed is less than or equal to a 5-4 gear shifting vehicle speed, the single chip gives a high level to excite the pin of the embedded voice chip, the chip can send out a voice prompt of 'please lower the gear to the 4-gear', and a gear-down green light is turned on;
secondly, when the vehicle runs in 4-gear and the vehicle speed is less than or equal to 4-3 gear shifting speed, the single chip gives a high level to excite the pin of the embedded voice chip, the chip can send out voice prompt of 'please lower the gear to 3-gear', and the gear-down green light is turned on;
when the vehicle runs in the 3-gear, when the vehicle speed is less than or equal to the 3-2 gear shifting vehicle speed, the single chip gives a high level to excite the pin of the embedded voice chip, the chip can send out a voice prompt of 'please lower the gear to the 2-gear', and the gear-down green light is turned on;
fourthly, when the vehicle runs in the 2-gear, when the speed is less than or equal to the 2-1 gear shifting speed, the single chip gives a high level to excite the pin of the embedded voice chip, the chip can send out a voice prompt of 'please lower the gear to the 1-gear', and a gear-down green light is turned on;
4. if the speed is judged not to meet the requirement, the program edited by the singlechip does not generate any signal excitation, and a new speed signal is input in a circulating mode.
The above embodiments are only used to clearly illustrate the technical solutions of the present invention, and the protection scope of the present invention includes but is not limited to the above embodiments, and any suitable changes or substitutions made by those skilled in the art according to the claims of the present invention and any shown technical fields should fall within the patent protection scope of the present invention.
Claims (6)
1. The utility model provides a warning system that shifts economizes on fuel based on driver's intention which characterized in that: the system comprises a detection module for detecting the current gear, the opening degree of an accelerator and the speed of a vehicle, a single chip microcomputer for judging whether oil-saving gear shifting is needed or not and a reminding assembly for reminding lifting gear shifting, wherein the detection module and the reminding assembly are connected with the single chip microcomputer; the detection module comprises a vehicle speed sensor, an accelerator opening sensor and a gear detector which are connected with the single chip microcomputer, and the vehicle speed sensor is arranged on a fixed part of a wheel, a main speed reducer or a transmission.
2. The fuel-saving gear shifting reminding system according to claim 1, characterized in that: the accelerator opening sensor comprises a contact arranged on an accelerator pedal and an adjustable resistor connected with the single chip microcomputer, the contact is in sliding fit with the adjustable resistor, and the adjustable resistor is connected with the single chip microcomputer through an A/D conversion module.
3. The fuel-saving gear shifting reminding system according to claim 1, characterized in that: the system is provided with a memory card connected with a vehicle central control system, and the singlechip is provided with an identification module connected with the memory card, a vehicle speed comparison module, a gear shifting vehicle speed acquisition module and a signal output module connected with the reminding assembly;
the memory card is used for storing the obtained up-down gear speed, a corresponding speed comparison program and a corresponding output program;
the identification module is used for judging whether the opening of the accelerator is larger than or equal to 75 percent; if yes, judging that the vehicle is in the stages of speed acceleration, overspeed and climbing, mainly aiming at the intention of a driver, and not carrying out gear shifting reminding; if not, taking the fuel economy of the whole vehicle as the main point to make a gear shifting prompt;
the gear shifting vehicle speed acquisition module is used for calculating a fuel consumption curve of a current gear and a next gear of the current gear under the same accelerator opening according to a relation among engine economy, vehicle structure parameters and environmental conditions and the obtained fuel consumption of the whole vehicle, and the intersection point of the two curves is a gear shifting point; selecting a gear-up or gear-down speed from the memory card by combining the current gear and the acceleration or deceleration working condition;
the vehicle speed comparison module is used for reading the vehicle speed of the current gear acquired by the vehicle speed sensor, and comparing the vehicle speed with the gear shifting vehicle speed acquired by combining the current acceleration or deceleration working condition and the gear shifting curve in a comparison program in a program storage area in the singlechip;
the signal output module is used for sending the corresponding level signal processed by the singlechip to the reminding component, generating a corresponding reminding mode and ending the program; if not, no voice prompt is generated, and the vehicle speed and the gear are continuously monitored.
4. The fuel-saving gear shifting reminding system according to claim 1, characterized in that: the reminding assembly comprises a voice reminding device and a lifting gear reminding lamp, the voice reminding device is connected with an amplifier, and the lifting gear reminding lamp is connected with the single chip microcomputer through a lifting gear reminding lamp driving circuit.
5. The fuel-saving gear shifting reminding system according to claim 4, characterized in that: the voice prompt device is provided with a voice chip with an embedded voice chip pin, and the lifting gear prompt lamp is an LED indicating lamp and comprises a gear-lifting indicating lamp and a gear-lowering indicating lamp.
6. The fuel-saving gear shifting reminding system according to claim 5, characterized in that: the single chip microcomputer is an STM32 single chip microcomputer, and the voice chip is a SYN6288 Chinese voice synthesis chip.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116101291A (en) * | 2022-12-30 | 2023-05-12 | 瑞修得信息科技(无锡)有限公司 | Method and device for reminding vehicle climbing oil consumption |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116101291A (en) * | 2022-12-30 | 2023-05-12 | 瑞修得信息科技(无锡)有限公司 | Method and device for reminding vehicle climbing oil consumption |
| CN116101291B (en) * | 2022-12-30 | 2023-12-15 | 瑞修得信息科技(无锡)有限公司 | Method and device for reminding vehicle climbing oil consumption |
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