CN117869579A - Automatic measurement and control system for crankshaft gear throwing - Google Patents

Automatic measurement and control system for crankshaft gear throwing Download PDF

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Publication number
CN117869579A
CN117869579A CN202311736892.7A CN202311736892A CN117869579A CN 117869579 A CN117869579 A CN 117869579A CN 202311736892 A CN202311736892 A CN 202311736892A CN 117869579 A CN117869579 A CN 117869579A
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China
Prior art keywords
gear
throwing
crankshaft
speed
change rate
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Granted
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CN202311736892.7A
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Chinese (zh)
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CN117869579B (en
Inventor
李世民
沈驰
朱守伦
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Jiangsu Xinhengding Equipment Manufacturing Co ltd
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Jiangsu Xinhengding Equipment Manufacturing Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/74—Inputs being a function of engine parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/0437—Smoothing ratio shift by using electrical signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H2061/0015—Transmission control for optimising fuel consumptions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H2061/0075—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by a particular control method
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
    • F16H2061/161—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed by checking feasibility of shifts, i.e. determine if requested shift can be successfully completed and post shift values are in an acceptable range

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention provides an automatic measurement and control system for crankshaft gear throwing, which comprises: the system comprises a signal processing module, a control strategy module and an operation executing module. The invention improves the driving comfort, realizes stable gear shifting operation by accurately judging the gear throwing time, reduces the vibration and impact felt by a driver and improves the driving comfort; enhancing the reliability of driving: by dynamically adjusting the gear throwing time and mode, the gear throwing operation is ensured under proper conditions according to the parameters of the engine speed, the load, the vehicle speed and the like, the misoperation and the fault of gear shifting are reduced, and the driving reliability is improved; and the fuel economy of the vehicle is improved: by accurately controlling the gear throwing time, unnecessary energy loss and fuel consumption are reduced, the fuel economy of the vehicle is improved, and the operation cost is reduced; increasing the performance and efficiency of the vehicle: by optimizing the gear throwing operation, a quicker and smoother gear shifting process is realized, and the acceleration performance and the running efficiency of the vehicle are improved.

Description

Automatic measurement and control system for crankshaft gear throwing
Technical Field
The invention relates to the technical field of automobile engineering and control engineering, in particular to an automatic measurement and control system for crankshaft gear throwing.
Background
Crank throw is a technique in a vehicle driveline for effecting a shift operation of a vehicle. In the conventional manual gear shifting system, a driver needs to manually operate a gear shift through a clutch and a gear shift lever, and the technology of shifting a crankshaft can realize automatic gear shifting operation. The crank throw technique utilizes an Electronic Control Unit (ECU) to determine when to perform a shift operation by sensing engine speed and load conditions based on engine crankshaft motion characteristics of the vehicle. When gear shifting is needed, the ECU controls the clutch and the gear shifting actuator to realize automatic clutch and gear shifting actions, so that a stable gear shifting process is realized. The crankshaft gear-dump technique may provide a variety of advantages including faster shift speeds, smoother shift processes, reduced fatigue levels for driver operation, and the like. It finds wide application in modern automobiles, particularly in automatic shifting systems such as automatic and dual clutch actuators.
First, application number: 202210795439.2A multi-cylinder synchronous wireless measuring device and method for crankshaft gear-throwing are disclosed, wherein a wireless angle encoder is arranged at the free end of a crankshaft in a wireless measuring mode instead of a manual reading mode, the current angle value of the crankshaft is transmitted to an upper computer in real time, a plurality of wireless distance sensors are arranged on measuring points of crank arms of all cylinders, the upper computer issues a collection command according to the current angle value of the crankshaft, the wireless distance sensors are triggered to measure, and the crankshaft gear-throwing value transmitted by the wireless distance sensors is recorded and stored, so that the wireless measurement of multi-cylinder crankshaft gear-throwing data is completed at one time. Although saving manpower, reducing the working strength, improving the working efficiency and the measuring accuracy, and promoting the intellectualization of the manufacturing process of the diesel engine; however, the gear throwing performance and the fuel economy are not optimally matched, so that the gear shifting efficiency is reduced to a certain extent.
Second prior art, application number: 202310370443.9 an automatic punching device for a crankshaft throw gear difference measuring point comprises a driving mechanism, a pair of sliding block mechanisms and a connecting rod mechanism; the driving mechanism comprises a base, a cylinder seat, a double-acting cylinder, a screw sleeve, a manual reversing valve and two air pipes; the pair of slide block mechanisms are symmetrically arranged at two sides of the inner opening gear of the two crank arms of the corresponding gear and are positioned at the lower side of the driving mechanism, and each slide block mechanism comprises a guide sleeve, a slide block, a sample punch, a wedge block, an adjusting screw and a set screw; the connecting rod mechanism is arranged in the middle of the inner opening gear of the two corresponding crank arms, and comprises a middle connecting rod and two side connecting rods positioned on two sides of the middle connecting rod, and two sides of the lower end of the two side connecting rods are respectively hinged with two sides of the sliding block. Although the device has the advantages of simple structure, low cost, automatic point punching in the whole process, time and labor saving in operation, convenient use and high working efficiency, the consistency of the punching positions of all gears can be effectively ensured, and therefore, the small measurement error of the crankshaft gear throwing difference and the accurate measurement result are ensured; but the function is relatively simple, and the accuracy of crankshaft gear-throwing measurement is affected.
Third, application number: 201710301166.0 discloses a protection method for preventing a crankshaft counterweight of a diesel engine from colliding with a main shaft bush, which comprises the following steps: the oil slinger is pre-sleeved to an output end flange of the crankshaft, so that the oil slinger and the crankshaft are connected into a whole, the oil slinger and the main shaft bush are simultaneously installed in the engine body, before the crankshaft balancing weight is installed, grooves formed by a protecting plate and a protecting baffle of the tool assembly are respectively clamped into left shoulder and right shoulder of the oil slinger, the tool assembly is installed to the output end face of the engine body of the diesel engine to be fastened with the engine body by fixing screws, and then the balancing weights of all gears are sequentially assembled on the crankshaft. The axial movement range of the crankshaft generated in the process of installing the balancing weight and the overturning process of the machine body is effectively controlled, so that the balancing weight fixed on the crankshaft can move along with the crankshaft in a certain range, the moving position of the balancing weight cannot contact with the main shaft bush, the problem of damaging the main shaft bush is solved, and the assembly quality is ensured; however, the control strategy of the gear throwing is comparatively backward, and the gear throwing time and mode cannot be dynamically adjusted, so that the control precision of the gear throwing of the crankshaft is not high.
The intelligent water controlled by the gear-throwing measuring machine in the prior art I, the prior art II and the prior art III are low in water content, the gear-throwing performance and the fuel economy cannot be optimally matched, and the gear-shifting efficiency problem is reduced to a certain extent; meanwhile, the system can provide smoother and comfortable driving experience, and reduces impact and noise during gear throwing.
Disclosure of Invention
In order to solve the technical problems, the invention provides an automatic measurement and control system for crankshaft gear throwing, comprising:
the signal processing module is responsible for monitoring signals of the rotation position and the speed of the crankshaft by using the crankshaft position sensor, preprocessing the signals, judging when to perform gear throwing operation according to the preprocessed signals of the position and the speed of the crankshaft, and controlling the corresponding actuator;
the control strategy module is in charge of dynamically adjusting the gear throwing time and mode according to the parameters of the engine speed, the load and the vehicle speed based on preset gear throwing conditions and algorithms;
The operation execution module is responsible for controlling the pressure and the flow in the hydraulic system by using an electromagnetic valve or a hydraulic motor as an actuator so as to realize the gear-throwing operation; the actuator receives an operation instruction of the control strategy module, and transmits hydraulic pressure to corresponding parts of the crankshaft to realize gear throwing.
Optionally, the signal processing module includes:
the signal denoising sub-module is responsible for acquiring a signal from a crankshaft position sensor, wherein the signal represents the position and speed change of a crankshaft, filtering the signal, removing noise and interference and obtaining a smooth signal;
the component acquisition submodule is in charge of carrying out prediction interpolation and fitting on extreme point envelope curves of the smoothed signals to obtain maximum value envelope curves and minimum value envelope curves of the smoothed signals in a time period of acquiring the signals, calculating extreme value envelope curve average values of the maximum value envelope curves and the minimum value envelope curves, subtracting the extreme value envelope curve average values from the smoothed signals to obtain mean value removing signals, and obtaining direct current components of the eliminated signals;
the characteristic acquisition sub-module is responsible for eliminating the DC offset in the smoothed signal by adopting the DC component of the eliminated signal, obtaining the smoothed signal with the DC component removed, acquiring instantaneous characteristics such as peak value, frequency and phase, and reconstructing the position and speed signal of the crankshaft by using the smoothed signal with the DC component removed.
Optionally, the control policy module includes:
the parameter judging sub-module is in charge of acquiring the position and speed signals of the preprocessed crankshaft from the crankshaft position sensor and simultaneously acquiring the parameters of the rotating speed, the load and the vehicle speed of the engine; judging the acquired parameters according to preset gear throwing conditions and algorithms, and determining whether gear throwing operation is needed or not; the gear-throwing condition comprises a crankshaft position, a rate of change of crankshaft speed, a rate of change of engine speed, a load and a threshold value of a vehicle speed parameter;
the gear-throwing confirmation sub-module is responsible for determining a gear-throwing mode according to the judging result of the gear-throwing condition, and judging whether an instantaneous gear-throwing or a smooth gear-throwing mode is needed according to the rotating speed of the engine and the change rate of the load; determining a gear throwing time according to the gear throwing condition and the gear throwing mode by combining the position and the speed change rate of the crankshaft and the change rate of the engine speed;
and the gear-throwing execution sub-module is responsible for executing gear-throwing operation by controlling an engine control unit or an actuator control unit according to gear-throwing time and a gear-throwing mode, and observing the change condition of the crankshaft position and the crankshaft speed, the change condition of the engine rotating speed and the acceleration performance of the vehicle.
Optionally, the parameter judging sub-module includes:
the threshold setting unit is in charge of acquiring historical crankshaft position, crankshaft speed, engine rotating speed, load and vehicle speed parameters, acquiring change rate information related to the historical parameters, performing operation according to the change rate information preset by the crankshaft and the transmitter to obtain average change rate information, and taking the average change rate information as a threshold value of each parameter and taking the threshold value as a gear throwing condition;
the parameter calculation unit is in charge of acquiring the current crankshaft position sensor, acquiring the preprocessed crankshaft position and crankshaft speed signals, and acquiring current engine rotating speed, load and vehicle speed parameters; for each parameter, comparing the difference between the current parameter value and the parameter value at the previous time to obtain the corresponding change rate of each parameter; calculating to obtain the change rate of the position and the speed of the crankshaft, the change rate of the rotating speed of the engine, the load and the vehicle speed parameters;
the result judging unit is in charge of determining whether gear throwing operation is needed according to the judgment result of the gear throwing condition and the change rate corresponding to the parameter; if the gear-throwing condition is met, namely the change rate of the parameter exceeds a threshold value, gear-throwing operation is needed.
Optionally, the threshold setting unit includes:
The gear-throwing threshold defining subunit is responsible for acquiring gear-throwing times, success rate and misjudgment rate data, analyzing the frequency of gear-throwing operation according to the monitored gear-throwing operation times, and judging whether the frequency or the rarity is too high or low;
the gear-throwing threshold value adjusting subunit is responsible for determining whether a threshold value strategy needs to be adjusted according to the frequency of gear-throwing operation and the performance of the system; if the gear throwing operation is too frequent, increasing a threshold value; if the gear throwing operation is rare, reducing the threshold value; the adjustment of the threshold value is realized by adjusting the parameter for controlling the gear-throwing operation threshold value in a system configuration file or parameter, and after the configuration file or parameter is modified, the modification is saved, and the monitoring system is restarted or reloaded so as to enable the new gear-throwing operation threshold value to be set into effect;
and the gear-throwing threshold monitoring subunit is responsible for continuously monitoring the gear-throwing operation condition after adjusting the gear-throwing operation threshold, observing whether the adjustment is effective or not, and continuously iterating and optimizing the threshold strategy according to the monitoring result.
Optionally, the gear-dump threshold defines a frequent or rare criterion in the subunit: determining a time window for counting the number of gear throwing operations, and recording the number of gear throwing operations in each time window; the frequent and rare thresholds are customized, and if the number of gear throwing operations in a time window exceeds the set frequent threshold, the gear throwing operation is judged to be frequent; and if the number of the gear throwing operations is lower than the set rarity threshold, judging that the gear throwing operations are rarity.
Optionally, the gear-throwing confirmation sub-module includes:
the data acquisition unit is in charge of acquiring real-time data of the engine rotating speed by using a sensor or a control unit of the vehicle, acquiring real-time data of a load by using the sensor or the control unit of the vehicle, calculating the change rate of the load, and calculating the change rate of the load by the difference between the current load value and the load value at the previous moment;
the mode selection unit is responsible for comparing the change rate of the engine speed with the change rate of the load according to a preset instantaneous downshift threshold; if the rate of change of the engine speed is higher than a set instantaneous downshift threshold and the rate of change of the load is lower than the set threshold, an instantaneous downshift is required; if the rate of change of the engine speed is higher than the set smooth downshift threshold and the rate of change of the load is also higher than the set smooth downshift threshold, a smooth downshift is required;
and the operation feedback unit is responsible for sending a signal to the actuator through the control unit of the vehicle according to the instant downshift or the smooth downshift, triggering corresponding downshift operation, receiving a confirmation result of the downshift operation and returning successful information of the downshift operation to the control unit of the vehicle.
Optionally, the gear-throwing execution sub-module includes:
The change rate calculation unit is responsible for calculating the change rate of the engine speed, calculating the change rate of the crankshaft speed through the difference between the current engine speed value and the engine speed value at the previous moment, and calculating the change rate of the crankshaft speed through the difference between the current crankshaft speed value and the crankshaft speed value at the previous moment;
the timing confirmation unit is in charge of carrying out gear shifting operation and determining gear shifting timing when the change rate of the engine speed exceeds a set gear shifting threshold value and the change rate of the crankshaft speed also exceeds the set gear shifting threshold value according to preset gear shifting conditions and gear shifting modes;
the operation evaluation unit is responsible for controlling the engine to adjust the clutch or the transmission through the engine control unit or the executor control unit so as to realize the gear-throwing operation; and observing the change conditions of the position of the crankshaft, the speed of the crankshaft and the rotation speed of the engine after gear throwing, and evaluating the effect of gear throwing operation.
Alternatively, the rate of change of the engine speed= (current engine speed-engine speed at the previous moment)/time interval is calculated; rate of change of crankshaft speed= (current crankshaft speed-crankshaft speed at the previous moment)/time interval is calculated.
Optionally, the operation execution module includes:
The instruction generation sub-module is in charge of generating a gear-shifting operation instruction by the control strategy module, judging whether gear-shifting operation is needed or not by the control strategy module according to preset gear-shifting conditions and gear-shifting modes, and generating a corresponding gear-shifting operation instruction; the control strategy module transmits a gear throwing operation instruction to the executor, and the executor starts to execute corresponding operation after receiving the instruction;
the instruction execution sub-module is in charge of realizing gear throwing operation by controlling the pressure and flow in the hydraulic system according to the gear throwing operation instruction; the actuator transmits hydraulic pressure to corresponding parts of the crankshaft through controlling the hydraulic system so as to realize gear throwing operation;
and the pressure transmission sub-module is responsible for realizing the gear throwing operation by controlling the pressure and flow in the hydraulic system and the transmission of hydraulic force.
The signal processing module of the invention uses a crank shaft position sensor to monitor signals of the rotation position and speed of a crank shaft, preprocesses the signals, judges when to perform gear throwing operation according to the preprocessed signals of the position and speed of the crank shaft, and controls a corresponding actuator; the control strategy module dynamically adjusts the gear throwing time and mode according to parameters such as the rotation speed, the load and the speed of the engine based on preset gear throwing conditions and algorithms; the operation execution module uses an electromagnetic valve or a hydraulic motor as an actuator to control the pressure and the flow in a hydraulic system so as to realize the gear throwing operation; the actuator receives an operation instruction of the control strategy module, and transmits hydraulic pressure to corresponding parts of the crankshaft to realize gear throwing; the scheme improves the driving comfort: by accurately judging the gear throwing time, stable gear shifting operation is realized, vibration and impact felt by a driver are reduced, and travelling comfort is improved. Enhancing the reliability of driving: by dynamically adjusting the gear throwing time and mode, the gear throwing operation is ensured under proper conditions according to the parameters of the engine speed, the load, the vehicle speed and the like, the misoperation and the fault of gear shifting are reduced, and the driving reliability is improved. And the fuel economy of the vehicle is improved: by accurately controlling the gear throwing time, unnecessary energy loss and fuel consumption are reduced, the fuel economy of the vehicle is improved, and the operation cost is reduced. Increasing the performance and efficiency of the vehicle: by optimizing the gear throwing operation, a quicker and smoother gear shifting process is realized, the acceleration performance and the running efficiency of the vehicle are improved, and the pleasure and the efficiency of driving are increased.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a block diagram of a system for automatic measurement and control of crankshaft gear-throwing in embodiment 1 of the present invention;
FIG. 2 is a block diagram of a signal processing module in embodiment 2 of the present invention;
FIG. 3 is a block diagram of a control strategy module in embodiment 3 of the present invention;
FIG. 4 is a block diagram of a parameter determination submodule in embodiment 4 of the present invention;
fig. 5 is a block diagram of a threshold setting unit in embodiment 5 of the present invention;
FIG. 6 is a block diagram of a gear-throwing acknowledgement submodule in embodiment 6 of the present invention;
FIG. 7 is a block diagram of a gear-throwing execution submodule in embodiment 7 of the present invention;
Fig. 8 is a block diagram of an operation execution module in embodiment 8 of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the application. As used in the examples and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Example 1: as shown in fig. 1, an embodiment of the present invention provides an automatic measurement and control system for crankshaft gear-throwing, including:
the signal processing module is responsible for monitoring signals of the rotation position and the speed of the crankshaft by using the crankshaft position sensor, preprocessing the signals, judging when to perform gear throwing operation according to the preprocessed signals of the position and the speed of the crankshaft, and controlling the corresponding actuator;
the control strategy module is in charge of dynamically adjusting the gear throwing time and mode according to parameters such as the rotation speed, the load and the speed of the engine based on preset gear throwing conditions and algorithms;
the operation execution module is responsible for controlling the pressure and the flow in the hydraulic system by using an electromagnetic valve or a hydraulic motor as an actuator so as to realize the gear-throwing operation; the actuator receives an operation instruction of the control strategy module, and transmits hydraulic pressure to corresponding parts of the crankshaft to realize gear throwing;
the working principle and beneficial effects of the technical scheme are as follows: the signal processing module of the embodiment uses a crank shaft position sensor to monitor signals of the rotation position and the speed of the crank shaft, preprocesses the signals, judges when to perform gear throwing operation according to the preprocessed signals of the position and the speed of the crank shaft, and controls a corresponding actuator; the control strategy module dynamically adjusts the gear throwing time and mode according to parameters such as the rotation speed, the load and the speed of the engine based on preset gear throwing conditions and algorithms; the operation execution module uses an electromagnetic valve or a hydraulic motor as an actuator to control the pressure and the flow in a hydraulic system so as to realize the gear throwing operation; the actuator receives an operation instruction of the control strategy module, and transmits hydraulic pressure to corresponding parts of the crankshaft to realize gear throwing; the scheme improves the driving comfort: by accurately judging the gear throwing time, stable gear shifting operation is realized, vibration and impact felt by a driver are reduced, and travelling comfort is improved. Enhancing the reliability of driving: by dynamically adjusting the gear throwing time and mode, the gear throwing operation is ensured under proper conditions according to the parameters of the engine speed, the load, the vehicle speed and the like, the misoperation and the fault of gear shifting are reduced, and the driving reliability is improved. And the fuel economy of the vehicle is improved: by accurately controlling the gear throwing time, unnecessary energy loss and fuel consumption are reduced, the fuel economy of the vehicle is improved, and the operation cost is reduced. Increasing the performance and efficiency of the vehicle: by optimizing the gear throwing operation, a quicker and smoother gear shifting process is realized, the acceleration performance and the running efficiency of the vehicle are improved, and the pleasure and the efficiency of driving are increased.
The embodiment can improve the comfort, reliability and economy of driving and improve the performance and efficiency of the vehicle through accurate signal processing, intelligent control strategy and reliable operation execution. The system can realize more accurate and efficient gear-throwing operation, reduce energy loss and engine load and improve the efficiency of the whole power system by automatically measuring and controlling the gear-throwing process of the crankshaft. Meanwhile, smoother and comfortable driving experience can be provided, and impact and noise during gear throwing are reduced.
Example 2: as shown in fig. 2, on the basis of embodiment 1, a signal processing module provided in an embodiment of the present invention includes:
the signal denoising sub-module is responsible for acquiring a signal from a crankshaft position sensor, wherein the signal represents the position and speed change of a crankshaft, filtering the signal, removing noise and interference and obtaining a smooth signal;
the component acquisition submodule is in charge of carrying out prediction interpolation and fitting on extreme point envelope curves of the smoothed signals to obtain maximum value envelope curves and minimum value envelope curves of the smoothed signals in a time period of acquiring the signals, calculating extreme value envelope curve average values of the maximum value envelope curves and the minimum value envelope curves, subtracting the extreme value envelope curve average values from the smoothed signals to obtain mean value removing signals, and obtaining direct current components of the eliminated signals;
The characteristic acquisition submodule is responsible for eliminating direct current offset in the smooth signal by adopting the direct current component of the eliminated signal, obtaining the smooth signal with the direct current component removed, acquiring instantaneous characteristics such as peak value, frequency, phase and the like, and reconstructing a position and speed signal of the crankshaft by using the smooth signal with the direct current component removed;
the working principle and beneficial effects of the technical scheme are as follows: the signal denoising submodule of the embodiment obtains a signal from a crankshaft position sensor, the signal represents the position and speed change of a crankshaft, and the signal is subjected to filtering processing to remove noise and interference so as to obtain a smooth signal; the component acquisition submodule carries out prediction interpolation and fitting on the extreme point envelope curve of the smoothed signal to obtain a maximum value envelope curve and a minimum value envelope curve of the smoothed signal in the time period of acquiring the signal, calculates the average value of the maximum value envelope curve and the extreme value envelope curve of the minimum value envelope curve, subtracts the average value of the extreme value envelope curve from the smoothed signal to obtain a mean value removing signal, and obtains a direct current component of the eliminated signal; the characteristic acquisition submodule eliminates direct current offset in the smooth signal by adopting the direct current component of the eliminated signal to obtain the smooth signal with the direct current component removed, acquires instantaneous characteristics such as peak value, frequency, phase and the like, and reconstructs a position and speed signal of the crankshaft by using the smooth signal with the direct current component removed; the scheme effectively processes the signals of the crank shaft position sensor through the steps of signal denoising, component acquisition, characteristic acquisition and the like, and achieves the following purposes: noise and interference removal: noise and interference components in the signals are removed through filtering processing, so that the finally obtained signals are smoother and more accurate. Eliminating the direct current component: the method comprises the steps of obtaining an extreme value envelope curve of a signal through a prediction interpolation and fitting method, calculating the average value of the extreme value envelope curve, subtracting the average value from a smooth signal to obtain a signal for eliminating direct current components, and aims to eliminate direct current offset in the signal and keep dynamic change information of the signal. Acquiring transient characteristics: by eliminating the signal after the direct current component, the instantaneous characteristics of the signal, such as peak value, frequency, phase and the like, can be extracted. These features can be used to analyze the position and speed changes of the crankshaft to determine the timing of the gear-dump operation and to control the action of the corresponding actuators; the effect of eliminating the direct current component of the signal to obtain the instantaneous characteristic of the smooth signal on the gear-throwing operation is to provide accurate time information so as to execute the gear-throwing operation at the correct moment; a shift-out operation refers to switching to the next higher or lower gear in the car or mechanical device; by acquiring the instantaneous characteristics of the smooth signal, the optimal gear throwing time can be determined so as to ensure a smooth gear shifting process; the function of controlling the corresponding actuator is to control the relevant actuator to perform the gear throwing operation according to the acquired signal characteristics. The actuator may be an electric motor, a hydraulic system or other form of power means for effecting a shift in gear; by controlling the action of the actuator, accurate switching of gears can be ensured, and smoothness and stability of driving or equipment operation are improved. Reconstructing crankshaft position and speed signals: using the smoothed signal with the DC component removed, the position and speed signals of the crankshaft can be reconstructed, providing accurate crankshaft state information, providing a reference for subsequent control and regulation.
The embodiment improves the quality and accuracy of the signals of the crank shaft position sensor, provides a reliable signal basis for gear throwing operation and control of corresponding actuators, and further improves the performance and effect of the system.
Example 3: as shown in fig. 3, on the basis of embodiment 1, a control policy module provided in an embodiment of the present invention includes:
the parameter judging sub-module is in charge of acquiring the position and speed signals of the preprocessed crankshaft from the crankshaft position sensor and acquiring parameters such as the rotating speed, the load and the speed of the engine; judging the acquired parameters according to preset gear throwing conditions and algorithms, and determining whether gear throwing operation is needed or not; the gear-throwing condition comprises thresholds of parameters such as crankshaft position, rate of change of crankshaft speed, rate of change of engine rotation speed, load, vehicle speed and the like;
the gear-throwing confirmation sub-module is responsible for determining a gear-throwing mode according to the judging result of the gear-throwing condition, and judging whether an instantaneous gear-throwing or a smooth gear-throwing mode is needed according to the rotating speed of the engine and the change rate of the load; determining a gear throwing time according to the gear throwing condition and the gear throwing mode by combining the position and the speed change rate of the crankshaft and the change rate of the engine speed;
The gear-shifting execution sub-module is responsible for executing gear shifting operation by controlling an engine control unit or an executor control unit according to gear shifting time and a gear shifting mode, and observing the change condition of a crankshaft position and a crankshaft speed, the change condition of an engine rotating speed, the acceleration performance of a vehicle and the like;
the working principle and beneficial effects of the technical scheme are as follows: the parameter judging submodule of the embodiment obtains the position and speed signals of the preprocessed crankshaft from the crankshaft position sensor, and simultaneously obtains parameters such as the rotating speed, the load and the vehicle speed of the engine; judging the acquired parameters according to preset gear throwing conditions and algorithms, and determining whether gear throwing operation is needed or not; the gear-throwing condition comprises thresholds of parameters such as crankshaft position, rate of change of crankshaft speed, rate of change of engine rotation speed, load, vehicle speed and the like; the gear-throwing confirmation sub-module determines a gear-throwing mode according to the judging result of the gear-throwing condition, and the gear-throwing mode judges whether instantaneous gear-throwing or smooth gear-throwing is needed according to the rotating speed of the engine and the change rate of the load; determining a gear throwing time according to the gear throwing condition and the gear throwing mode by combining the position and the speed change rate of the crankshaft and the change rate of the engine speed; the gear-shifting execution sub-module executes gear shifting operation by controlling an engine control unit or an executor control unit according to gear shifting time and a gear shifting mode, and observes the change condition of a crankshaft position and a crankshaft speed, the change condition of an engine rotating speed, the acceleration performance of a vehicle and the like; the scheme realizes dynamic adjustment of the gear throwing time and mode so as to improve the driving performance and the fuel economy of the automobile; through judging and controlling according to various parameters, the gear throwing operation can be more accurate and precise, and insufficient power or excessive abrasion caused by premature or too late gear throwing can be avoided. Meanwhile, the instantaneous downshift or the smooth downshift is selected according to the change rate of the engine speed and the load, so that the gear shifting operation is smoother and more comfortable, and the driving comfort and riding experience are improved. By comprehensively considering a plurality of parameters and conditions, the optimal gear throwing strategy can be realized according to different driving conditions and requirements, and the overall performance and driving experience are improved.
Example 4: as shown in fig. 4, on the basis of embodiment 3, the parameter determination submodule provided in the embodiment of the present invention includes:
the threshold setting unit is in charge of acquiring parameters such as historical crankshaft position, crankshaft speed, engine rotating speed, load, vehicle speed and the like, acquiring change rate information related to the historical parameters, performing operation according to preset change rate information such as a crankshaft, a transmitter and the like, acquiring average change rate information, taking the average change rate information as a threshold value of each parameter, and taking the threshold value as a gear throwing condition;
the parameter calculation unit is in charge of acquiring the current crankshaft position sensor, acquiring the preprocessed crankshaft position and crankshaft speed signals, and acquiring parameters such as the current engine rotating speed, load and vehicle speed; and comparing the difference between the current parameter value and the parameter value at the previous time for each parameter to obtain the corresponding change rate of each parameter. Calculating to obtain parameters such as the change rate of the position and the speed of the crankshaft, the change rate of the rotating speed of the engine, the load, the speed of the vehicle and the like;
the result judging unit is in charge of determining whether gear throwing operation is needed according to the judgment result of the gear throwing condition and the change rate corresponding to the parameter; if the gear throwing condition is met, namely the change rate of the parameters exceeds a threshold value, gear throwing operation is needed;
The working principle and beneficial effects of the technical scheme are as follows: the threshold setting unit of the embodiment obtains parameters such as historical crankshaft position, crankshaft speed, engine rotation speed, load, vehicle speed and the like, obtains change rate information related to the historical parameters, calculates according to preset change rate information such as a crankshaft, a transmitter and the like, obtains average change rate information, takes the average change rate information as a threshold value of each parameter, and takes the threshold value as a gear throwing condition; the parameter calculation unit obtains the current crank position sensor, the preprocessed crank position and crank speed signals, and obtains the parameters of the current engine speed, load, vehicle speed and the like; and comparing the difference between the current parameter value and the parameter value at the previous time for each parameter to obtain the corresponding change rate of each parameter. Calculating to obtain parameters such as the change rate of the position and the speed of the crankshaft, the change rate of the rotating speed of the engine, the load, the speed of the vehicle and the like; the result judging unit determines whether the gear throwing operation is needed according to the judgment result of the gear throwing condition and the change rate corresponding to the parameter; if the gear throwing condition is met, namely the change rate of the parameters exceeds a threshold value, gear throwing operation is needed; according to the scheme, whether the change rate of each parameter exceeds a preset range is judged by setting the threshold value, so that whether gear throwing operation is needed is determined; the automatic gear-throwing control of the engine can be realized, the engine is ensured to be kept in a proper rotating speed range in the working process, and the conditions of overload or overhigh rotating speed and the like are avoided, so that the working efficiency and stability of the engine are improved, the service life of the engine is prolonged, and meanwhile, the driving comfort and safety are also improved.
Example 5: as shown in fig. 5, on the basis of embodiment 4, the threshold setting unit provided in the embodiment of the present invention includes:
the gear-throwing threshold defining subunit is responsible for acquiring data such as gear-throwing times, success rate, misjudgment rate and the like, analyzing the frequency of gear-throwing operation according to the monitored gear-throwing operation times, and judging whether the frequency or the rarity is too high or low; frequent or rare criteria: determining a time window for counting the number of gear throwing operations, and recording the number of gear throwing operations in each time window; the frequent and rare thresholds are customized, and if the number of gear throwing operations in a time window exceeds the set frequent threshold, the gear throwing operation is judged to be frequent; if the number of the gear throwing operations is lower than a set rarity threshold, judging that the gear throwing operations are rarity;
the gear-throwing threshold value adjusting subunit is responsible for determining whether a threshold value strategy needs to be adjusted according to the frequency of gear-throwing operation and the performance of the system; if the gear throwing operation is too frequent, increasing a threshold value; if the gear throwing operation is rare, reducing the threshold value; the adjustment of the threshold value is realized by adjusting the parameter for controlling the gear-throwing operation threshold value in a system configuration file or parameter, and after the configuration file or parameter is modified, the modification is saved, and the monitoring system is restarted or reloaded so as to enable the new gear-throwing operation threshold value to be set into effect;
The gear-throwing threshold monitoring subunit is responsible for continuously monitoring the gear-throwing operation condition after adjusting the gear-throwing operation threshold, observing whether the adjustment is effective or not, and continuously iterating and optimizing a threshold strategy according to the monitoring result;
the working principle and beneficial effects of the technical scheme are as follows: the gear throwing threshold value definition subunit of the embodiment acquires data such as the gear throwing times, the success rate, the false judgment rate and the like, analyzes the frequency of gear throwing operation according to the monitored gear throwing operation times, and judges whether the frequency or the rarity is too high or low; frequent or rare criteria: determining a time window for counting the number of gear throwing operations, and recording the number of gear throwing operations in each time window; the frequent and rare thresholds are customized, and if the number of gear throwing operations in a time window exceeds the set frequent threshold, the gear throwing operation is judged to be frequent; if the number of the gear throwing operations is lower than a set rarity threshold, judging that the gear throwing operations are rarity; the gear-throwing threshold value adjusting subunit decides whether to need to adjust a threshold value strategy according to the frequency of gear-throwing operation and the performance of the system; if the gear throwing operation is too frequent, increasing a threshold value; if the gear throwing operation is rare, reducing the threshold value; the adjustment of the threshold value is realized by adjusting the parameter for controlling the gear-throwing operation threshold value in a system configuration file or parameter, and after the configuration file or parameter is modified, the modification is saved, and the monitoring system is restarted or reloaded so as to enable the new gear-throwing operation threshold value to be set into effect; the gear-throwing threshold monitoring subunit continuously monitors the gear-throwing operation condition after adjusting the gear-throwing operation threshold, observes whether the adjustment is effective or not, and continuously iterates and optimizes the threshold strategy according to the monitoring result; according to the scheme, through monitoring and analyzing the gear-throwing operation frequency, the situation that gear-throwing operation is too frequent or rare can be found in time, so that corresponding measures are taken for adjustment; frequent gear-throwing operations may increase the burden and delay of the system, affecting the performance and user experience of the system, while rare gear-throwing operations may result in failure to handle some important events in time. By adjusting the gear-throwing threshold value, the frequency of gear-throwing operation can be reasonably controlled, and the stability and the high efficiency of the system are ensured. Meanwhile, by monitoring the adjusted gear-throwing operation condition and continuously iterating and optimizing the threshold strategy, the performance of the system and the accuracy of the gear-throwing operation can be further improved, and the reliability and the user satisfaction of the system are improved.
Example 6: as shown in fig. 6, on the basis of embodiment 3, the gear-throwing confirmation sub-module provided by the embodiment of the invention includes:
the data acquisition unit is in charge of acquiring real-time data of the engine rotating speed by using a sensor or a control unit of the vehicle, acquiring real-time data of a load by using the sensor or the control unit of the vehicle, calculating the change rate of the load, and calculating the change rate of the load by the difference between the current load value and the load value at the previous moment;
the mode selection unit is responsible for comparing the change rate of the engine speed with the change rate of the load according to a preset instantaneous downshift threshold; if the rate of change of the engine speed is higher than a set instantaneous downshift threshold and the rate of change of the load is lower than the set threshold, an instantaneous downshift is required; if the rate of change of the engine speed is higher than the set smooth downshift threshold and the rate of change of the load is also higher than the set smooth downshift threshold, a smooth downshift is required;
an operation feedback unit which is responsible for sending a signal to an actuator through a control unit of the vehicle according to the instant downshift or the smooth downshift, triggering corresponding downshift operation, receiving a confirmation result of the downshift operation, and returning success information of the downshift operation to the control unit of the vehicle;
The working principle and beneficial effects of the technical scheme are as follows: the data acquisition unit of the embodiment acquires real-time data of the engine speed by using a sensor or a control unit of the vehicle, acquires real-time data of the load by using the sensor or the control unit of the vehicle, calculates the change rate of the load, and calculates the change rate of the load by the difference between the current load value and the load value at the previous moment; the mode selection unit compares the change rate of the engine speed with the change rate of the load according to a preset instantaneous downshift threshold; if the rate of change of the engine speed is higher than a set instantaneous downshift threshold and the rate of change of the load is lower than the set threshold, an instantaneous downshift is required; if the rate of change of the engine speed is higher than the set smooth downshift threshold and the rate of change of the load is also higher than the set smooth downshift threshold, a smooth downshift is required; the operation feedback unit sends a signal to the actuator through the control unit of the vehicle according to the instant downshift or the smooth downshift, triggers corresponding downshift operation, receives a confirmation result of the downshift operation, and returns success information of the downshift operation to the control unit of the vehicle; according to the scheme, whether instantaneous downshift or smooth downshift operation is needed or not is judged by monitoring the engine speed and the load change rate of the vehicle in real time; the method can be realized as follows: ride comfort and travelling comfort of driving are improved: by automatically determining whether a downshift operation is required according to the engine speed and the load change rate, it is possible to avoid running irregularity and uncomfortable conditions caused by an excessive engine speed or an excessive load. The driving safety is improved: a reasonable downshift operation can maintain the engine within a proper speed range, providing sufficient power and responsiveness, thereby improving driving safety. And (3) reducing fuel consumption: through timely downshift operation, the engine can work in a high-efficiency rotating speed range, unnecessary energy loss is reduced, and accordingly fuel consumption is reduced. Reducing losses to the vehicle and engine: the reasonable downshift operation can reduce the overload work of the engine, prolong the service life of the engine and the transmission system and reduce the maintenance and replacement cost.
According to the embodiment, through real-time monitoring and judgment, intelligent downshift operation is realized, driving smoothness, comfort and safety are improved, fuel consumption and vehicle loss are reduced, and the intelligent downshift control method has important significance and value.
Example 7: as shown in fig. 7, on the basis of embodiment 3, the gear-throwing execution sub-module provided in the embodiment of the present invention includes:
a change rate calculation unit in charge of calculating a change rate of the engine speed, calculated by a difference between the current engine speed value and the engine speed value at the previous time, the change rate= (current engine speed-engine speed at the previous time)/time interval; calculating the change rate of the crankshaft speed, wherein the change rate is calculated by the difference between the current crankshaft speed value and the crankshaft speed value at the previous moment, and the change rate is = (current crankshaft speed-the crankshaft speed at the previous moment)/time interval;
the timing confirmation unit is in charge of carrying out gear shifting operation and determining gear shifting timing when the change rate of the engine speed exceeds a set gear shifting threshold value and the change rate of the crankshaft speed also exceeds the set gear shifting threshold value according to preset gear shifting conditions and gear shifting modes;
the operation evaluation unit is responsible for controlling the engine to adjust the clutch or the transmission through the engine control unit or the executor control unit so as to realize the gear-throwing operation; observing the change conditions of the position of the crankshaft, the speed of the crankshaft and the rotation speed of the engine after gear throwing, and evaluating the effect of gear throwing operation;
The working principle and beneficial effects of the technical scheme are as follows: the change rate calculation unit of the present embodiment calculates the change rate of the engine speed by the difference between the current engine speed value and the engine speed value at the previous time, the change rate= (current engine speed-engine speed at the previous time)/time interval; calculating the change rate of the crankshaft speed, wherein the change rate is calculated by the difference between the current crankshaft speed value and the crankshaft speed value at the previous moment, and the change rate is = (current crankshaft speed-the crankshaft speed at the previous moment)/time interval; the timing confirmation unit performs a gear throwing operation according to preset gear throwing conditions and a gear throwing mode, and determines gear throwing timing when the change rate of the engine speed exceeds a set gear throwing threshold value and the change rate of the crankshaft speed also exceeds the set gear throwing threshold value; the operation evaluation unit controls the engine to adjust the clutch or the transmission through the engine control unit or the executor control unit so as to realize the gear throwing operation; observing the change conditions of the position of the crankshaft, the speed of the crankshaft and the rotation speed of the engine after gear throwing, and evaluating the effect of gear throwing operation; according to the scheme, the proper gear throwing time is determined by calculating the change rate of the engine rotating speed and the crankshaft speed and judging whether the gear throwing condition and the gear throwing mode are met; the engine control unit or the executor control unit is controlled to realize the gear-throwing operation, so that the vehicle can be accelerated rapidly, and the performance and driving experience of the vehicle are improved. In addition, by observing the change of the crankshaft position, the crankshaft speed and the engine speed after the gear throwing, the effect of the gear throwing operation can be evaluated. If the gear throwing operation is effective, the acceleration performance of the vehicle can be obviously improved; if the gear dump operation is not ideal, excessive engine load or other problems may result, requiring adjustment or correction. Therefore, the embodiment provides a feasible gear-throwing operation flow, and the effect of the gear-throwing operation flow is evaluated through actual observation so as to further optimize and improve the strategy and parameter setting of the gear-throwing operation.
Example 8: as shown in fig. 8, on the basis of embodiment 1, the operation execution module provided in the embodiment of the present invention includes:
the instruction generation sub-module is in charge of generating a gear-shifting operation instruction by the control strategy module, judging whether gear-shifting operation is needed or not by the control strategy module according to preset gear-shifting conditions and gear-shifting modes, and generating a corresponding gear-shifting operation instruction; the control strategy module transmits a gear throwing operation instruction to the executor, and the executor starts to execute corresponding operation after receiving the instruction;
the instruction execution sub-module is in charge of realizing gear throwing operation by controlling the pressure and flow in the hydraulic system according to the gear throwing operation instruction; the actuator transmits hydraulic pressure to corresponding parts of the crankshaft through controlling the hydraulic system so as to realize gear throwing operation;
the pressure transmission submodule is responsible for realizing the gear throwing operation by controlling the pressure and flow in the hydraulic system and the transmission of hydraulic force;
the working principle and beneficial effects of the technical scheme are as follows: the instruction generation sub-module of the embodiment generates a gear-shifting operation instruction by a control strategy module, and the control strategy module judges whether gear-shifting operation is needed according to preset gear-shifting conditions and gear-shifting modes and generates a corresponding gear-shifting operation instruction; the control strategy module transmits a gear throwing operation instruction to the executor, and the executor starts to execute corresponding operation after receiving the instruction; the instruction execution sub-module is used for realizing the gear throwing operation by controlling the pressure and the flow in the hydraulic system according to the gear throwing operation instruction; the actuator transmits hydraulic pressure to corresponding parts of the crankshaft through controlling the hydraulic system so as to realize gear throwing operation; the pressure transmission submodule is used for controlling the pressure and flow in the hydraulic system and the transmission of hydraulic force, so that the gear-throwing operation is realized; the scheme realizes automatic gear shifting operation, generates a gear shifting operation instruction through the control strategy module, and controls the pressure and flow in the hydraulic system through the actuator, thereby realizing the gear shifting operation; the comfort and the safety of driving can be improved, the operation burden of a driver is reduced, and the performance and the fuel economy of the vehicle can be improved. By monitoring the rate of change of the engine speed and the crankshaft speed and the set gear-throwing threshold, gear-throwing operation is ensured to be performed at a proper time, and discomfort and damage caused by premature or too late gear-throwing are avoided.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. An automatic measurement and control system for crankshaft gear-throwing, comprising:
the signal processing module is responsible for monitoring signals of the rotation position and the speed of the crankshaft by using the crankshaft position sensor, preprocessing the signals, judging when to perform gear throwing operation according to the preprocessed signals of the position and the speed of the crankshaft, and controlling the corresponding actuator;
the control strategy module is in charge of dynamically adjusting the gear throwing time and mode according to the parameters of the engine speed, the load and the vehicle speed based on preset gear throwing conditions and algorithms;
the operation execution module is responsible for controlling the pressure and the flow in the hydraulic system by using an electromagnetic valve or a hydraulic motor as an actuator so as to realize the gear-throwing operation; the actuator receives an operation instruction of the control strategy module, and transmits hydraulic pressure to corresponding parts of the crankshaft to realize gear throwing.
2. The automatic measurement and control system for crankshaft gear-shifting of claim 1, wherein the signal processing module comprises:
The signal denoising sub-module is responsible for acquiring a signal from a crankshaft position sensor, wherein the signal represents the position and speed change of a crankshaft, filtering the signal, removing noise and interference and obtaining a smooth signal;
the component acquisition submodule is in charge of carrying out prediction interpolation and fitting on extreme point envelope curves of the smoothed signals to obtain maximum value envelope curves and minimum value envelope curves of the smoothed signals in a time period of acquiring the signals, calculating extreme value envelope curve average values of the maximum value envelope curves and the minimum value envelope curves, subtracting the extreme value envelope curve average values from the smoothed signals to obtain mean value removing signals, and obtaining direct current components of the eliminated signals;
the characteristic acquisition sub-module is responsible for eliminating the DC offset in the smoothed signal by adopting the DC component of the eliminated signal, obtaining the smoothed signal with the DC component removed, acquiring instantaneous characteristics such as peak value, frequency and phase, and reconstructing the position and speed signal of the crankshaft by using the smoothed signal with the DC component removed.
3. The automatic measurement and control system for crankshaft gear-shifting of claim 1, wherein the control strategy module comprises:
the parameter judging sub-module is in charge of acquiring the position and speed signals of the preprocessed crankshaft from the crankshaft position sensor and simultaneously acquiring the parameters of the rotating speed, the load and the vehicle speed of the engine; judging the acquired parameters according to preset gear throwing conditions and algorithms, and determining whether gear throwing operation is needed or not; the gear-throwing condition comprises a crankshaft position, a rate of change of crankshaft speed, a rate of change of engine speed, a load and a threshold value of a vehicle speed parameter;
The gear-throwing confirmation sub-module is responsible for determining a gear-throwing mode according to the judging result of the gear-throwing condition, and judging whether an instantaneous gear-throwing or a smooth gear-throwing mode is needed according to the rotating speed of the engine and the change rate of the load; determining a gear throwing time according to the gear throwing condition and the gear throwing mode by combining the position and the speed change rate of the crankshaft and the change rate of the engine speed;
and the gear-throwing execution sub-module is responsible for executing gear-throwing operation by controlling an engine control unit or an actuator control unit according to gear-throwing time and a gear-throwing mode, and observing the change condition of the crankshaft position and the crankshaft speed, the change condition of the engine rotating speed and the acceleration performance of the vehicle.
4. The automatic measurement and control system for crankshaft gear-shifting of claim 3, wherein the parameter determination sub-module comprises:
the threshold setting unit is in charge of acquiring historical crankshaft position, crankshaft speed, engine rotating speed, load and vehicle speed parameters, acquiring change rate information related to the historical parameters, performing operation according to the change rate information preset by the crankshaft and the transmitter to obtain average change rate information, and taking the average change rate information as a threshold value of each parameter and taking the threshold value as a gear throwing condition;
The parameter calculation unit is in charge of acquiring the current crankshaft position sensor, acquiring the preprocessed crankshaft position and crankshaft speed signals, and acquiring current engine rotating speed, load and vehicle speed parameters; for each parameter, comparing the difference between the current parameter value and the parameter value at the previous time to obtain the corresponding change rate of each parameter; calculating to obtain the change rate of the position and the speed of the crankshaft, the change rate of the rotating speed of the engine, the load and the vehicle speed parameters;
the result judging unit is in charge of determining whether gear throwing operation is needed according to the judgment result of the gear throwing condition and the change rate corresponding to the parameter; if the gear-throwing condition is met, namely the change rate of the parameter exceeds a threshold value, gear-throwing operation is needed.
5. The automatic measurement and control system for crank throw as set forth in claim 4, wherein the threshold setting unit includes:
the gear-throwing threshold defining subunit is responsible for acquiring gear-throwing times, success rate and misjudgment rate data, analyzing the frequency of gear-throwing operation according to the monitored gear-throwing operation times, and judging whether the frequency or the rarity is too high or low;
the gear-throwing threshold value adjusting subunit is responsible for determining whether a threshold value strategy needs to be adjusted according to the frequency of gear-throwing operation and the performance of the system; if the gear throwing operation is too frequent, increasing a threshold value; if the gear throwing operation is rare, reducing the threshold value; the adjustment of the threshold value is realized by adjusting the parameter for controlling the gear-throwing operation threshold value in a system configuration file or parameter, and after the configuration file or parameter is modified, the modification is saved, and the monitoring system is restarted or reloaded so as to enable the new gear-throwing operation threshold value to be set into effect;
And the gear-throwing threshold monitoring subunit is responsible for continuously monitoring the gear-throwing operation condition after adjusting the gear-throwing operation threshold, observing whether the adjustment is effective or not, and continuously iterating and optimizing the threshold strategy according to the monitoring result.
6. The automatic measurement and control system for crankshaft gear-throwing as set forth in claim 5, wherein the gear-throwing threshold defines a frequent or rare criterion in the subunit: determining a time window for counting the number of gear throwing operations, and recording the number of gear throwing operations in each time window; the frequent and rare thresholds are customized, and if the number of gear throwing operations in a time window exceeds the set frequent threshold, the gear throwing operation is judged to be frequent; and if the number of the gear throwing operations is lower than the set rarity threshold, judging that the gear throwing operations are rarity.
7. The automatic measurement and control system for crankshaft gear-throwing as set forth in claim 3, wherein the gear-throwing confirmation sub-module comprises:
the data acquisition unit is in charge of acquiring real-time data of the engine rotating speed by using a sensor or a control unit of the vehicle, acquiring real-time data of a load by using the sensor or the control unit of the vehicle, calculating the change rate of the load, and calculating the change rate of the load by the difference between the current load value and the load value at the previous moment;
The mode selection unit is responsible for comparing the change rate of the engine speed with the change rate of the load according to a preset instantaneous downshift threshold; if the rate of change of the engine speed is higher than a set instantaneous downshift threshold and the rate of change of the load is lower than the set threshold, an instantaneous downshift is required; if the rate of change of the engine speed is higher than the set smooth downshift threshold and the rate of change of the load is also higher than the set smooth downshift threshold, a smooth downshift is required;
and the operation feedback unit is responsible for sending a signal to the actuator through the control unit of the vehicle according to the instant downshift or the smooth downshift, triggering corresponding downshift operation, receiving a confirmation result of the downshift operation and returning successful information of the downshift operation to the control unit of the vehicle.
8. The automatic measurement and control system for crankshaft gear-shifting of claim 3, wherein the gear-shifting execution sub-module comprises:
the change rate calculation unit is responsible for calculating the change rate of the engine speed, calculating the change rate of the crankshaft speed through the difference between the current engine speed value and the engine speed value at the previous moment, and calculating the change rate of the crankshaft speed through the difference between the current crankshaft speed value and the crankshaft speed value at the previous moment;
The timing confirmation unit is in charge of carrying out gear shifting operation and determining gear shifting timing when the change rate of the engine speed exceeds a set gear shifting threshold value and the change rate of the crankshaft speed also exceeds the set gear shifting threshold value according to preset gear shifting conditions and gear shifting modes;
the operation evaluation unit is responsible for controlling the engine to adjust the clutch or the transmission through the engine control unit or the executor control unit so as to realize the gear-throwing operation; and observing the change conditions of the position of the crankshaft, the speed of the crankshaft and the rotation speed of the engine after gear throwing, and evaluating the effect of gear throwing operation.
9. The automatic measurement and control system for crank throw as claimed in claim 8, wherein the rate of change of the engine speed = (current engine speed-engine speed at the previous moment)/time interval is calculated; rate of change of crankshaft speed= (current crankshaft speed-crankshaft speed at the previous moment)/time interval is calculated.
10. The automatic measurement and control system for crankshaft gear-throwing of claim 1, wherein the operation execution module comprises:
the instruction generation sub-module is in charge of generating a gear-shifting operation instruction by the control strategy module, judging whether gear-shifting operation is needed or not by the control strategy module according to preset gear-shifting conditions and gear-shifting modes, and generating a corresponding gear-shifting operation instruction; the control strategy module transmits a gear throwing operation instruction to the executor, and the executor starts to execute corresponding operation after receiving the instruction;
The instruction execution sub-module is in charge of realizing gear throwing operation by controlling the pressure and flow in the hydraulic system according to the gear throwing operation instruction; the actuator transmits hydraulic pressure to corresponding parts of the crankshaft through controlling the hydraulic system so as to realize gear throwing operation;
and the pressure transmission sub-module is responsible for realizing the gear throwing operation by controlling the pressure and flow in the hydraulic system and the transmission of hydraulic force.
CN202311736892.7A 2023-12-15 2023-12-15 Automatic measurement and control system for crankshaft gear throwing Active CN117869579B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10330154A1 (en) * 2003-07-04 2005-01-20 Zf Friedrichshafen Ag Method of increasing spontaneity of gear changing in automatic transmission of motor vehicles, involves setting up gear change by gear-change member control of automatic transmission
US20170174220A1 (en) * 2015-12-21 2017-06-22 Cummins In Vehicle controls for determining optimal gear shifting opportunities using dynamically determined vehicle parameters
CN114776799A (en) * 2022-04-06 2022-07-22 潍柴动力股份有限公司 Gear shifting strategy correction method, controller, transmission and motor vehicle
CN114964795A (en) * 2022-07-06 2022-08-30 上海中船三井造船柴油机有限公司 Multi-cylinder synchronous wireless measuring device and method for crankshaft gear throwing
CN115847005A (en) * 2022-12-17 2023-03-28 江苏新恒鼎装备制造有限公司 Numerical control crankshaft hydraulic adjusting platform

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10330154A1 (en) * 2003-07-04 2005-01-20 Zf Friedrichshafen Ag Method of increasing spontaneity of gear changing in automatic transmission of motor vehicles, involves setting up gear change by gear-change member control of automatic transmission
US20170174220A1 (en) * 2015-12-21 2017-06-22 Cummins In Vehicle controls for determining optimal gear shifting opportunities using dynamically determined vehicle parameters
CN114776799A (en) * 2022-04-06 2022-07-22 潍柴动力股份有限公司 Gear shifting strategy correction method, controller, transmission and motor vehicle
CN114964795A (en) * 2022-07-06 2022-08-30 上海中船三井造船柴油机有限公司 Multi-cylinder synchronous wireless measuring device and method for crankshaft gear throwing
CN115847005A (en) * 2022-12-17 2023-03-28 江苏新恒鼎装备制造有限公司 Numerical control crankshaft hydraulic adjusting platform

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