CN108775269B - Automatic engine starting and stopping control method and device of hybrid power loader - Google Patents
Automatic engine starting and stopping control method and device of hybrid power loader Download PDFInfo
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- CN108775269B CN108775269B CN201810522741.4A CN201810522741A CN108775269B CN 108775269 B CN108775269 B CN 108775269B CN 201810522741 A CN201810522741 A CN 201810522741A CN 108775269 B CN108775269 B CN 108775269B
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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
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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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
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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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/106—Detection of demand or actuation
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- Combustion & Propulsion (AREA)
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- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses an automatic engine starting and stopping control method and device of a hybrid loader, wherein the method comprises the following steps: judging whether the current charge state of the power battery is greater than or equal to a preset charge state or not; if yes, sending a flameout signal to an engine controller when the parking signal is received; if any preset starting condition of the automatic start-stop mode is met, sending a starting command to the motor controller; when the actual rotating speed of the engine reaches the starting rotating speed corresponding to the met preset starting condition, an ignition signal is sent to an engine controller; according to the invention, the charge state of the power battery is used as a standard in automatic engine starting and stopping control by judging whether the current charge state of the power battery is greater than or equal to a preset charge state or not; by adding the starting condition of the accelerator pedal in the preset starting condition, the starting of the engine in the automatic starting and stopping function can be realized by using the accelerator pedal, and the applicability to the hybrid power loader is enhanced.
Description
Technical Field
The invention relates to the technical field of loaders, in particular to an automatic engine start-stop control method and device of a hybrid power loader.
Background
With the development of modern society science and technology, energy conservation and emission reduction are more and more emphasized by people, so that the hybrid power loader is regarded as one of the future main development directions of the loader industry. The automatic engine starting and stopping control method can fully utilize the advantages of the electrically controlled engine of the hybrid loader, achieves the purposes of energy conservation and emission reduction in the operation process, and is more and more concerned by people.
An automatic engine starting and stopping control method in the prior art mainly aims at the traditional structural characteristics of a traditional loader and detects a clutch signal, a hand brake signal, a wheel speed signal and an engine starting battery signal to realize the automatic starting and stopping function of an engine. However, such a method does not consider that there is no clutch in the transmission system of some hybrid loaders, and because the hybrid loaders further include an energy management system, the hybrid loaders start the engine by the power battery, and therefore, the influence of the state of charge of the power battery on the automatic start and stop of the engine needs to be considered, which makes the prior art automatic start and stop control method of the engine hardly suitable for the hybrid loaders without a clutch. Therefore, how to provide an automatic engine starting and stopping control method suitable for a hybrid power loader according to the characteristics that a clutch does not exist in part of the hybrid power loader and a power battery is required to be used as another power output source is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to provide an automatic engine starting and stopping control method and device of a hybrid power loader, so that the automatic starting and stopping function of the hybrid power loader is realized, and the energy-saving and emission-reducing effects are improved.
In order to solve the technical problem, the invention provides an automatic engine start-stop control method of a hybrid loader, which comprises the following steps:
when the engine is in an idle speed mode, the vehicle speed is 0 and the automatic start-stop switch is turned on, judging whether the current charge state of the power battery is greater than or equal to a preset charge state;
if yes, judging whether a parking starting signal is received or not; the parking starting signal is an electronic parking braking starting signal or a hand brake pull-up signal;
if the parking signal is received, sending a flameout signal to an engine controller to enable the engine to be closed, wherein the engine is in a stop state of an automatic start-stop mode;
judging whether any preset starting condition of the automatic start-stop mode is met; wherein the preset starting condition comprises an accelerator pedal starting condition;
if any preset starting condition of the automatic start-stop mode is met, sending a starting command to a motor controller to drive the engine to rotate by a motor;
and when the actual rotating speed of the engine reaches the starting rotating speed corresponding to the preset starting condition, sending an ignition signal to the engine controller to start the engine and operate at the target rotating speed corresponding to the preset starting condition.
Optionally, the determining whether the accelerator pedal starting condition of the automatic start-stop mode is satisfied includes:
when the engine is in a stop state of the automatic start-stop mode, judging whether the current opening degree of an accelerator pedal is larger than or equal to a preset opening degree;
if yes, judging whether the current gear is an N gear;
if the current gear is the N gear, judging whether the current remaining oil quantity is larger than a preset oil quantity or not;
and if the current residual oil amount is larger than the preset oil amount, executing the step of sending a starting command to a motor controller to drive the engine to rotate by the motor.
Optionally, when the actual rotation speed of the engine reaches the start rotation speed corresponding to the preset start condition that is met, the sending of the ignition signal to the engine controller enables the engine to be started and run at the target rotation speed corresponding to the preset start condition that is met, includes:
and when the actual rotating speed of the engine reaches the analysis rotating speed of the current opening degree of the accelerator pedal, sending the ignition signal to the engine controller to start the engine and operate at the analysis rotating speed of the current opening degree of the accelerator pedal.
Optionally, the preset starting condition further includes a power generation demand starting condition;
judging whether the power generation requirement starting condition of the automatic start-stop mode is met or not, and the judging method comprises the following steps:
when the engine is in a stop state of the automatic start-stop mode, judging whether the current charge state of the power battery is smaller than a preset charge state;
if yes, judging whether the current gear is an N gear;
if the current gear is the N gear, judging whether the current remaining oil quantity is larger than a preset oil quantity or not;
and if the current residual oil amount is larger than the preset oil amount, executing the step of sending a starting command to a motor controller to drive the engine to rotate by the motor.
Optionally, before determining whether the current state of charge of the power battery is greater than or equal to the preset state of charge, the method further includes:
judging whether the current temperature of the cooling liquid of the engine is greater than or equal to a first preset temperature and less than or equal to a second preset temperature or not;
and if so, executing the step of judging whether the current charge state of the power battery is greater than or equal to the preset charge state.
Optionally, the preset starting conditions further include an idle-speed demand starting condition;
judging whether the idle speed requirement starting condition of the automatic start-stop mode is met or not, and the method comprises the following steps:
when the engine is in a stop state of the automatic start-stop mode, judging whether a steering starting signal or a parking closing signal is received or whether the current coolant temperature of the engine is lower than a third preset temperature; the parking closing signal is an electronic parking brake closing signal or a hand brake resetting signal, and the third preset temperature is less than or equal to the first preset temperature;
if yes, judging whether the current gear is an N gear;
if the current gear is the N gear, judging whether the current remaining oil quantity is larger than a preset oil quantity or not;
and if the current residual oil amount is larger than the preset oil amount, executing the step of sending a starting command to a motor controller to drive the engine to rotate by the motor.
Optionally, after determining whether the parking start signal is received, the method further includes:
if the parking starting signal is not received, judging whether the current opening of an accelerator pedal is smaller than the preset opening and a lifting handle starting signal, a turning handle starting signal and a steering starting signal are not received in a preset time period;
and if so, executing the step of sending a flameout signal to an engine controller to enable the engine to be closed and enable the engine to be in a stop state of an automatic start-stop mode.
In addition, the invention also provides an engine automatic start-stop control device of the hybrid power loader, which comprises:
the charge state judging module is used for judging whether the current charge state of the power battery is greater than or equal to a preset charge state or not when the engine is in an idle mode, the vehicle speed is 0 and the automatic start-stop switch is started;
the parking judging module is used for judging whether a parking starting signal is received or not if the current charge state of the power battery is larger than or equal to a preset charge state; the parking starting signal is an electronic parking braking starting signal or a hand brake pull-up signal;
the engine shutdown module is used for sending a flameout signal to an engine controller if the parking signal is received, so that the engine is shut down and is in a stop state of an automatic start-stop mode;
the starting judgment module is used for judging whether any preset starting condition of the automatic starting and stopping mode is met; wherein the preset starting condition comprises an accelerator pedal starting condition;
the motor starting module is used for sending a starting command to a motor controller if any preset starting condition of the automatic starting and stopping mode is met, and a motor drives the engine to rotate;
and the engine starting module is used for sending an ignition signal to the engine controller when the actual rotating speed of the engine reaches the starting rotating speed corresponding to the preset starting condition, so that the engine is started and operates at the target rotating speed corresponding to the preset starting condition.
Optionally, the starting judgment module includes: an accelerator pedal starting judgment submodule;
the accelerator pedal starting judgment submodule comprises:
the opening judgment unit is used for judging whether the current opening of an accelerator pedal is larger than or equal to a preset opening or not when the engine is in a stop state of the automatic start-stop mode;
the gear judging unit is used for judging whether the current gear is an N gear or not if the current opening of the accelerator pedal is larger than or equal to a preset opening;
the oil quantity judging unit is used for judging whether the current remaining oil quantity is larger than the preset oil quantity or not if the current gear is the N gear; and if the current remaining oil amount is larger than the preset oil amount, sending a first starting signal to the engine shutdown module.
Optionally, the apparatus further comprises:
the automatic judgment module is used for judging whether the current opening of an accelerator pedal is smaller than the preset opening and a lifting handle starting signal, a rotating bucket handle starting signal and a steering starting signal are not received in the preset time period if the parking starting signal is not received; and if so, sending a second starting signal to the engine closing module.
The invention provides an automatic engine starting and stopping control method of a hybrid loader, which comprises the following steps: when the engine is in an idle speed mode, the vehicle speed is 0 and the automatic start-stop switch is turned on, judging whether the current charge state of the power battery is greater than or equal to a preset charge state; if yes, judging whether a parking starting signal is received or not; the parking starting signal is an electronic parking braking starting signal or a hand brake pull-up signal; if the parking signal is received, sending a flameout signal to an engine controller to enable the engine to be closed, and enabling the engine to be in a stop state of an automatic start-stop mode; judging whether any preset starting condition of the automatic start-stop mode is met; the preset starting condition comprises an accelerator pedal starting condition; if any preset starting condition of the automatic start-stop mode is met, a starting command is sent to a motor controller, and the motor drives the engine to rotate; when the actual rotating speed of the engine reaches the starting rotating speed corresponding to the met preset starting condition, an ignition signal is sent to an engine controller, so that the engine is started and operates at the target rotating speed corresponding to the met preset starting condition;
therefore, the method can determine whether the current charge state of the power battery meets the charge state of the starting generator of the next automatic start-stop function before the hybrid loader shuts down the engine through the automatic start-stop function by judging whether the current charge state of the power battery is larger than or equal to the preset charge state and taking the charge state of the power battery as a standard in the automatic start-stop control of the engine; the starting condition of the engine in the automatic starting and stopping function can be realized by directly utilizing the accelerator pedal by adding the accelerator pedal starting condition in the preset starting condition, the condition that the engine cannot be started through detection of the clutch because the clutch does not exist in the hybrid loader is avoided, the applicability to the hybrid loader is enhanced, and the energy-saving and emission-reducing effects are improved. In addition, the invention also provides an automatic engine starting and stopping control device of the hybrid power loader, and the automatic engine starting and stopping control device has the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart of an engine automatic start-stop control method for a hybrid loader according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a transmission structure of a coaxial parallel hybrid loader;
FIG. 3 is a schematic diagram of a control system for a coaxial parallel hybrid loader;
FIG. 4 is a flowchart illustrating an accelerator pedal start condition determination in another method for controlling an automatic engine start and stop of a hybrid loader according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating an idle-requirement starting condition determination process in another method for controlling an automatic engine start and stop of a hybrid loader according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a determination of a power generation requirement starting condition in another method for controlling an automatic engine start and stop of a hybrid loader according to an embodiment of the present invention;
fig. 7 is a structural diagram of an automatic engine start-stop control device of a hybrid loader according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating an automatic engine start-stop control method of a hybrid loader according to an embodiment of the present invention, where the method includes:
step 101: when the engine is in an idle speed mode, the vehicle speed is 0 and the automatic start-stop switch is turned on, judging whether the current charge state of the power battery is greater than or equal to a preset charge state; if yes, go to step 102.
The execution main body of the method for controlling the automatic start and stop of the engine of the hybrid loader provided by the embodiment can be a complete machine controller VCU for controlling the transmission structure of the coaxial parallel hybrid loader shown in fig. 2 in fig. 3, or can be a controller in a hybrid loader, for the specific selection of the execution main body of the complete machine controller VCU in the embodiment, the execution main body can be set by a designer according to a practical scene and user requirements, a processor or a single chip microcomputer can be adopted, and the embodiment is not limited to this.
It will be appreciated that the purpose of this step may be to take into account the effect of the power cell as a power take-off source for the hybrid loader on engine start-up, taking the state of charge of the power cell as a criterion in the automatic engine start-stop control. By judging whether the current charge state of the power battery is greater than or equal to the preset charge state, whether the current charge state of the power battery meets the charge state of the generator started by the automatic start-stop function can be determined before the hybrid loader shuts down the engine through the automatic start-stop function.
Correspondingly, the setting of the specific numerical value of the preset charge state in the step can be set by a designer according to a practical scene and user requirements, and can be set to a numerical value which ensures that the engine can be started for 10 times; the current charge state of the power battery is more than or equal to the preset charge state, and the automatic engine starting and stopping function can shut down the engine. The present embodiment does not set any limit to this.
It should be noted that, in this step, when the engine is in the idle mode, the vehicle speed is 0, and the automatic start-stop switch is turned on, it is determined whether the current charge state of the power battery is greater than or equal to the preset charge state, that is, before determining whether the current charge state of the power battery is greater than or equal to the preset charge state, three determinations of determining whether the engine is in the idle mode, determining whether the vehicle speed is 0, and determining whether the automatic start-stop switch is turned on may also be included. The three determinations before this step, the determination of this step, and the determination of step 103 may be sub-determinations that determine whether to send a stall signal to the engine controller, as in fig. 3, and the purpose of this embodiment may be to add the determination of this step to the sub-determinations that determine whether to send a stall signal to the engine controller by the complete machine controller VCU, and the specific determination order that determines whether to send a stall signal to the engine controller by the complete machine controller VCU may be set by a designer, which is not limited in this embodiment.
Specifically, the specific process of determining whether the current state of charge of the power battery is greater than or equal to the preset state of charge in this step may be, for example, comparing, by the complete machine controller VCU in fig. 3, the state of charge SOC (current state of charge) sent by the receiving power battery controller BMS with the preset state of charge stored in advance, which is not limited in this embodiment. For the case that the current charge state of the power battery is smaller than the preset charge state, the next judgment after the preset time interval may be waited, the previous judgment step may also be returned, or the current process may be directly ended or processed in a manner similar to the judgment in the prior art before the step, which is not limited in this embodiment.
Preferably, the method provided by the embodiment may further include determining the current coolant temperature of the engine to further determine whether the complete machine controller VCU shown in fig. 3 can send a stall signal to the engine controller. Before the step, the method also comprises the step of judging whether the current temperature of the cooling liquid of the engine is greater than or equal to a first preset temperature and less than or equal to a second preset temperature; if yes, entering the step; wherein the first preset temperature is lower than the second preset temperature.
Correspondingly, the judgment of the current coolant temperature of the engine can be to judge whether the current coolant temperature of the engine is greater than or equal to a first preset temperature and less than or equal to a second preset temperature; it is also possible to determine whether the current coolant temperature of the engine is equal to or greater than a first preset temperature. The present embodiment does not set any limit to this. The specific values of the first preset temperature and the second preset temperature can be set by a designer according to a practical scene and user requirements, if the first preset temperature can be set to 70 degrees, the second preset temperature can be set to 103 degrees, and the embodiment does not limit the setting.
Step 102: judging whether a parking starting signal is received or not; if yes, go to step 103.
The parking starting signal is an electronic parking braking starting signal or a hand brake pull-up signal. The purpose in this step may be to enter 103 after receiving a parking signal such as an electronic parking brake start signal or a hand brake pull-up signal, and a specific selection of the parking start signal may be an electronic parking brake start signal (EPB ═ 1) transmitted when the driver presses the electronic parking brake, a hand brake pull-up signal (PB ═ 1) transmitted when the driver (user) pulls the hand brake, or another parking brake signal. The specific choice of the parking start signal can be set by a designer according to the specific structure of the hybrid loader, and the embodiment is not limited in any way.
It can be understood that, in the case that the parking start signal is not received in this step, the process of the present invention may be directly ended; or returning to the step before the step or waiting for the next judgment after a preset time interval; the judgment of the operation signal of the working device can be added to determine whether the user needs to turn off the engine or not, so that the user experience is further improved. The present embodiment does not set any limit to this.
Correspondingly, whether a user needs to shut down a specific process of the engine is determined by judging a manipulation signal of the working device, the designer can set the process correspondingly according to a specific structure of the hybrid loader, when the parking start signal is not received, whether the current opening degree of an accelerator pedal is smaller than the preset opening degree and a lifting handle enabling signal, a turning handle enabling signal and a steering enabling signal are not received within a preset time period can be judged, if yes, the step 103 is carried out, and the complete machine controller VCU shown in fig. 3 can judge that the current opening degree (APS) of the accelerator pedal is smaller than the preset opening degree and the lifting handle enabling signal (HPS) is not received10), rotary handle enable signal (HPS)20) and the steering enable signal (Ste 0) exceeds a preset time period, and if so, the process proceeds to step 103. The present embodiment does not set any limit to this.
Wherein, the lifting handle starting signal, the rotating bucket handle starting signal and the turning starting signal can be respectively HPS1>0、HPS2>0 and Ste>A signal of 0. As long as it can be determined that the user is operating the lifting handle, the turning handle and the vehicle turning direction respectively by receiving the lifting handle enabling signal, the turning handle enabling signal and the turning enabling signal, the specific setting modes of the lifting handle enabling signal, the turning handle enabling signal and the turning enabling signal are not limited in any way in this embodiment.
Specifically, the specific setting values of the preset time period and the preset opening degree can be set by a designer, and if the preset time period is set to 1min, the preset opening degree is set to 3%. The present embodiment does not set any limit to this.
Step 103: and sending a flameout signal to an engine controller to shut down the engine, wherein the engine is in a stop state of an automatic start-stop mode.
The step may be to turn off the engine by sending a stall signal to the engine controller, so that the engine is in a stop state in an automatic start-stop mode. In order to further enhance the effects of energy conservation and emission reduction, a closing signal can be sent to other devices such as a control device of an engine cooling fan, so that the devices such as the engine cooling fan which can be correspondingly closed when the engine is closed are closed, and the waste of energy is avoided.
Step 104: judging whether any preset starting condition of the automatic start-stop mode is met; the preset starting condition comprises an accelerator pedal starting condition; if so, go to step 105.
The preset starting condition can be a condition for determining that the engine needs to be started when the engine is closed and the engine is in a stop state of an automatic start-stop mode. The purpose of this step can be to add the accelerator pedal starting condition in the preset starting condition, avoid because hybrid loader does not have the clutch, can't be like prior art through detecting the clutch signal, confirm the condition that the user needs to start the engine. The specific number and type of the starting conditions in the preset starting conditions can be set by a designer according to practical scenes and user requirements, and for example, the specific number and type can also include idle speed requirement starting conditions, power generation requirement starting conditions and other starting conditions in the prior art. The present embodiment does not have any limitation as long as the preset starting condition includes an accelerator pedal starting condition.
Correspondingly, as long as it can be determined that the engine needs to be started through an accelerator pedal detection signal such as the opening degree of an accelerator pedal, the specific selection and the specific determination process of the accelerator pedal detection signal can be set by a designer according to a practical scene and a user requirement, and the embodiment is not limited thereto.
It can be understood that, in this step, whether any preset starting condition of the automatic start-stop mode is met may be determined as each preset starting condition of the automatic start-stop mode is respectively or sequentially determined, and if any preset starting condition is met, step 105 is performed.
Specifically, the specific process of determining whether the accelerator pedal start condition of the automatic start-stop mode is satisfied in this step may be as shown in fig. 4, and includes:
step 201: when the engine is in a stop state of an automatic start-stop mode, judging whether the current opening degree of an accelerator pedal is larger than or equal to a preset opening degree; if yes, go to step 202.
Here, the current opening degree of the accelerator pedal in this step may be an accelerator pedal opening degree APS received by the complete machine controller VCU shown in fig. 3.
It is understood that the preset opening in this step may be set by a designer to determine the opening value that the user needs to start the engine using the accelerator pedal. The specific value of the preset opening can be set by a designer according to a practical scene and user requirements, and if the specific value is set to be 3 percent. The present embodiment does not set any limit to this.
Step 202: judging whether the current gear is N gear; if yes, go to step 203.
The current gear in this step may be a gear signal GHPS received by the complete machine controller VCU as shown in fig. 3.
Specifically, for the case that the current gear is not the N gear, a corresponding prompt signal may be sent to the meter display device to prompt the user to switch the current gear to the N gear.
Step 203: judging whether the current remaining oil quantity is larger than a preset oil quantity or not; if yes, go to step 204.
It can be understood that the purpose of this step may be to determine whether the current remaining oil amount supports the starting operation of the engine by determining whether the current remaining oil amount is greater than the preset oil amount, so as to avoid wasting resources by controlling the rotation of the motor in step 105 when the current remaining oil amount is insufficient.
Specifically, the specific value setting of presetting the oil quantity can be set by a designer, and if the specific value setting can be set to satisfy the numerical value of the engine starting idling operation for a certain time. The present embodiment does not set any limit to this.
Correspondingly, when the preset starting condition includes a power generation requirement starting condition, the specific process of judging whether the power generation requirement starting condition of the automatic start-stop mode is satisfied may be as shown in fig. 5, and includes:
step 301: when the engine is in a stop state of an automatic start-stop mode, judging whether the current charge state of the power battery is smaller than a preset charge state; if yes, go to step 302.
It is understood that the preset state of charge in this step may be the preset state of charge in step 101, or may be another preset state of charge different from the preset state of charge in step 101, which is not limited in this embodiment.
Step 302: judging whether the current gear is N gear; if yes, go to step 303.
Here, this step is similar to step 202 and is not repeated here.
Step 303: judging whether the current remaining oil quantity is larger than a preset oil quantity or not; if yes, go to step 304.
Here, this step is similar to step 203 and is not repeated here.
Correspondingly, when the preset starting condition includes an idle speed demand starting condition, the specific process of determining whether the idle speed demand starting condition of the automatic start-stop mode is satisfied may be as shown in fig. 6, and includes:
step 401: when the engine is in a stop state of an automatic start-stop mode, judging whether a steering starting signal or a parking stopping signal is received or not or whether the current coolant temperature of the engine is lower than a third preset temperature or not; if yes, go to step 402.
The parking off signal may be an electronic parking brake off signal or a hand brake reset signal. The parking off signal may be specifically selected from an electronic parking brake off signal (EPB ═ 0) transmitted when the driver presses the electronic parking brake again, a manual brake reset signal (PB ═ 0) transmitted when the driver (user) pulls the manual brake down, and other parking brake off signals. The specific choice of the parking off signal may be set by a designer according to the specific structure of the hybrid loader, and the embodiment is not limited thereto.
It is understood that the specific value of the third preset temperature can be set by the designer, and when the method provided in this embodiment includes determining whether the current coolant temperature of the engine is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the third preset temperature in this step may be a value less than or equal to the first preset temperature, for example, when the first preset temperature is set to 70 °, and the second preset temperature is set to 103 °, the third preset temperature may be 60 °. The present embodiment is not limited to this.
Step 402: judging whether the current gear is N gear; if yes, go to step 403.
Here, this step is similar to step 202 and is not repeated here.
Step 403: judging whether the current remaining oil quantity is larger than a preset oil quantity or not; if yes, go to step 404.
Here, this step is similar to step 203 and is not repeated here.
Step 105: and sending a starting command to the motor controller to drive the motor to rotate.
The motor controller in this step may be a control device that controls a motor that drives a generator to rotate, and the specific type of the motor controller may be set by a designer according to the specific type of the generator in the hybrid loader, for example, for the ISG motor of the coaxial parallel hybrid loader in fig. 3, a corresponding ISG motor controller MCU may be selected. The present embodiment does not set any limit to this.
It will be appreciated that the purpose of this step may be to start the motor and rotate the engine by sending a start command to the motor controller. As for the specific content of the start command sent to the motor controller, the specific content may be only a command for starting the motor; the motor may also be started and the engine may be driven to rotate, so that the actual rotation speed of the engine reaches a start rotation speed command corresponding to the preset starting condition, that is, the start command includes not only a command for starting the motor but also a command for rotating the motor to reach a corresponding rotation speed. The present embodiment does not limit the present invention as long as the motor can be started and the engine can be driven to rotate by sending a start command to the motor controller.
Step 106: and when the actual rotating speed of the engine reaches the starting rotating speed corresponding to the met preset starting condition, sending an ignition signal to the engine controller to start the engine and operate at the target rotating speed corresponding to the met preset starting condition.
The actual rotating speed of the engine in this step may be a rotating speed at which the motor is started to drive the engine to rotate. The starting rotation speed corresponding to the preset starting condition that is satisfied in this step may be a starting rotation speed corresponding to one preset starting condition of the automatic start-stop mode that is satisfied in step 103. The specific setting of the starting rotating speed corresponding to the met preset starting condition can be set by a designer according to a practical scene and user requirements, and if the met preset starting condition is an accelerator pedal starting condition, the starting rotating speed corresponding to the accelerator pedal starting condition can be an analytic rotating speed obtained by analyzing the current opening of the accelerator pedal; when the preset starting condition is satisfied, the starting rotating speed corresponding to the idle speed requirement starting condition can be the preset lowest starting rotating speed; when the preset starting condition is the power generation requirement starting condition, the starting rotating speed corresponding to the power generation requirement starting condition can be the preset power generation rotating speed. The present embodiment does not set any limit to this.
It can be understood that the purpose of this step may be to start the engine and operate at a target rotation speed corresponding to the satisfied preset starting condition by sending an ignition signal to the engine controller when the actual rotation speed of the engine reaches the starting rotation speed corresponding to the satisfied preset starting condition. Correspondingly, the step can comprise the step of judging that the actual rotating speed of the engine reaches the starting rotating speed corresponding to the met preset starting condition before the step; if yes, the step is carried out, an ignition signal is sent to an engine controller, the engine is started, and the engine runs at a target rotating speed corresponding to a preset starting condition.
It should be noted that the specific setting of the target rotation speed corresponding to the preset starting condition that is met in this step may be set by a designer according to a practical scene and a user requirement, and if the preset starting condition that is met is an accelerator pedal starting condition, the target rotation speed corresponding to the accelerator pedal starting condition may be an analytic rotation speed obtained by analyzing the current opening degree of the accelerator pedal; when the preset starting condition is the idle speed requirement starting condition, the target rotating speed corresponding to the idle speed requirement starting condition can be the preset idle speed; when the preset starting condition is the power generation requirement starting condition, the target rotating speed corresponding to the power generation requirement starting condition can be the preset power generation rotating speed. The present embodiment does not set any limit to this.
In the embodiment of the invention, the charge state of the power battery is used as a standard in the automatic start-stop control of the engine by judging whether the current charge state of the power battery is greater than or equal to the preset charge state, so that whether the current charge state of the power battery meets the charge state of the generator started by the automatic start-stop function can be determined before the engine of the hybrid loader is closed by the automatic start-stop function; the starting condition of the engine in the automatic starting and stopping function can be realized by directly utilizing the accelerator pedal by adding the accelerator pedal starting condition in the preset starting condition, the condition that the engine cannot be started through detection of the clutch because the clutch does not exist in the hybrid loader is avoided, the applicability to the hybrid loader is enhanced, and the energy-saving and emission-reducing effects are improved.
Referring to fig. 7, fig. 7 is a structural diagram of an automatic engine start/stop control device of a hybrid loader according to an embodiment of the present invention, where the device may include:
the charge state judgment module 100 is used for judging whether the current charge state of the power battery is greater than or equal to a preset charge state or not when the engine is in an idle mode, the vehicle speed is 0 and the automatic start-stop switch is turned on;
the parking judging module 200 is configured to judge whether a parking starting signal is received if the current charge state of the power battery is greater than or equal to a preset charge state; the parking starting signal is an electronic parking braking starting signal or a hand brake pull-up signal;
the engine shutdown module 300 is configured to send a flameout signal to an engine controller if the parking signal is received, so that the engine is shut down and the engine is in a stopped state in an automatic start-stop mode;
the starting judgment module 400 judges whether any preset starting condition of the automatic starting and stopping mode is met; the preset starting condition comprises an accelerator pedal starting condition;
the motor starting module 500 is used for sending a starting command to the motor controller to drive the motor to rotate if any preset starting condition of the automatic starting and stopping mode is met;
the engine starting module 600 sends an ignition signal to an engine controller when the actual rotation speed of the engine reaches the starting rotation speed corresponding to the satisfied preset starting condition, so that the engine is started and operates at the target rotation speed corresponding to the satisfied preset starting condition.
Optionally, the starting determining module 400 may include: an accelerator pedal starting judgment submodule;
an accelerator pedal actuation determination submodule, comprising:
the opening judging unit is used for judging whether the current opening of the accelerator pedal is larger than or equal to the preset opening when the engine is in a stop state of an automatic start-stop mode;
the gear judging unit is used for judging whether the current gear is an N gear or not if the current opening of the accelerator pedal is larger than or equal to the preset opening;
the oil quantity judging unit is used for judging whether the current remaining oil quantity is larger than the preset oil quantity or not if the current gear is the N gear; and if the current remaining oil amount is larger than the preset oil amount, sending a first starting signal to an engine shutdown module.
Optionally, the apparatus may further include:
the automatic judgment module is used for judging whether the current opening of an accelerator pedal is smaller than the preset opening and a lifting handle starting signal, a rotary bucket handle starting signal and a steering starting signal are not received in the preset time period if the parking starting signal is not received; if so, a second start signal is sent to the engine shutdown module.
Alternatively, the engine start module 600 may include:
and the engine starting submodule is used for sending an ignition signal to the engine controller when the actual rotating speed of the engine reaches the analysis rotating speed of the current opening degree of the accelerator pedal, so that the engine is started and runs at the analysis rotating speed of the current opening degree of the accelerator pedal.
Optionally, when the preset starting condition further includes a power generation requirement starting condition, the starting judgment module 400 may further include: a power generation demand starting judgment submodule;
the power generation demand starting judgment submodule comprises:
the charge state judging unit is used for judging whether the current charge state of the power battery is smaller than a preset charge state or not when the engine is in a stop state of an automatic start-stop mode;
the second gear judging unit is used for judging whether the current gear is the N gear or not if the current charge state of the power battery is smaller than the preset charge state;
the second oil quantity judging unit is used for judging whether the current remaining oil quantity is larger than the preset oil quantity or not if the current gear is the N gear; and if the current remaining oil amount is larger than the preset oil amount, sending a third starting signal to the engine shutdown module.
Optionally, the apparatus may further include:
the cooling liquid temperature judging module is used for judging whether the current cooling liquid temperature of the engine is greater than or equal to a first preset temperature and less than or equal to a second preset temperature; if yes, a fourth start signal is sent to the charge state determination module 100.
Optionally, when the preset starting condition further includes an idle-speed demand starting condition, the starting determining module 400 may further include: an idle speed requirement starting judgment submodule;
an idle speed demand start judgment submodule comprising:
the idling requirement judging unit is used for judging whether a steering starting signal or a parking stopping signal is received or whether the current coolant temperature of the engine is lower than a third preset temperature when the engine is in a stop state of an automatic start-stop mode; the parking closing signal is an electronic parking brake closing signal or a hand brake resetting signal, and the third preset temperature is less than or equal to the first preset temperature;
the third gear judging unit is used for judging whether the current gear is the N gear or not if a steering starting signal or a parking closing signal is received or the current coolant temperature of the engine is lower than a third preset temperature;
the third oil quantity judging unit is used for judging whether the current remaining oil quantity is larger than the preset oil quantity or not if the current gear is the N gear; and if the current remaining oil amount is larger than the preset oil amount, sending a fifth starting signal to the engine shutdown module.
In this embodiment, the charge state determining module 100 determines whether the current charge state of the power battery is greater than or equal to a preset charge state, and the charge state of the power battery is used as a standard in automatic start-stop control of the engine, so that before the hybrid loader shuts down the engine through an automatic start-stop function, it can be determined whether the current charge state of the power battery meets the charge state of a generator started by the automatic start-stop function; by adding the accelerator pedal starting condition into the preset starting condition in the starting judgment module 400, the engine can be started in the automatic starting and stopping function by directly utilizing the accelerator pedal, the condition that the engine cannot be started through detection of the clutch because the hybrid loader does not have the clutch is avoided, the applicability to the hybrid loader is enhanced, and the energy-saving and emission-reducing effects are improved.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The method and the device for controlling the automatic start and stop of the engine of the hybrid loader provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. An engine automatic start-stop control method of a hybrid loader is characterized by comprising the following steps:
when the engine is in an idle speed mode, the vehicle speed is 0 and the automatic start-stop switch is turned on, judging whether the current charge state of the power battery is greater than or equal to a preset charge state;
if yes, judging whether a parking starting signal is received or not; the parking starting signal is an electronic parking braking starting signal or a hand brake pull-up signal;
if the parking starting signal is received, sending a flameout signal to an engine controller to enable the engine to be closed, wherein the engine is in a stop state of an automatic starting and stopping mode;
judging whether any preset starting condition of the automatic start-stop mode is met; wherein the preset starting condition comprises an accelerator pedal starting condition;
if any preset starting condition of the automatic start-stop mode is met, sending a starting command to a motor controller to drive the engine to rotate by a motor;
when the actual rotating speed of the engine reaches the starting rotating speed corresponding to the met preset starting condition, sending an ignition signal to the engine controller to start the engine and operate at the target rotating speed corresponding to the met preset starting condition;
the preset starting conditions further comprise power generation requirement starting conditions;
judging whether the power generation requirement starting condition of the automatic start-stop mode is met or not, and the judging method comprises the following steps:
when the engine is in a stop state of the automatic start-stop mode, judging whether the current charge state of the power battery is smaller than a preset charge state;
if yes, judging whether the current gear is an N gear;
if the current gear is the N gear, judging whether the current remaining oil quantity is larger than a preset oil quantity or not;
and if the current residual oil amount is larger than the preset oil amount, executing the step of sending a starting command to a motor controller to drive the engine to rotate by the motor.
2. The method of claim 1, wherein determining whether the accelerator pedal start condition of the automatic start-stop mode is met comprises:
when the engine is in a stop state of the automatic start-stop mode, judging whether the current opening degree of an accelerator pedal is larger than or equal to a preset opening degree;
if yes, judging whether the current gear is an N gear;
if the current gear is the N gear, judging whether the current remaining oil quantity is larger than a preset oil quantity or not;
and if the current residual oil amount is larger than the preset oil amount, executing the step of sending a starting command to a motor controller to drive the engine to rotate by the motor.
3. The method for controlling the automatic start and stop of the engine of the hybrid loader according to claim 2, wherein when the actual rotation speed of the engine reaches the start rotation speed corresponding to the preset start condition, an ignition signal is sent to the engine controller to start the engine and operate the engine at the target rotation speed corresponding to the preset start condition, and the method comprises the following steps:
and when the actual rotating speed of the engine reaches the analysis rotating speed of the current opening degree of the accelerator pedal, sending the ignition signal to the engine controller to start the engine and operate at the analysis rotating speed of the current opening degree of the accelerator pedal.
4. The method for controlling the automatic start and stop of the engine of the hybrid loader according to claim 1, wherein before the determining whether the current state of charge of the power battery is greater than or equal to the preset state of charge, the method further comprises:
judging whether the current temperature of the cooling liquid of the engine is greater than or equal to a first preset temperature and less than or equal to a second preset temperature or not;
and if so, executing the step of judging whether the current charge state of the power battery is greater than or equal to the preset charge state.
5. The automatic engine start-stop control method of the hybrid loader according to claim 4, wherein the preset starting conditions further include an idle-demand starting condition;
judging whether the idle speed requirement starting condition of the automatic start-stop mode is met or not, and the method comprises the following steps:
when the engine is in a stop state of the automatic start-stop mode, judging whether a steering starting signal or a parking closing signal is received or whether the current coolant temperature of the engine is lower than a third preset temperature; the parking closing signal is an electronic parking brake closing signal or a hand brake resetting signal, and the third preset temperature is less than or equal to the first preset temperature;
if yes, judging whether the current gear is an N gear;
if the current gear is the N gear, judging whether the current remaining oil quantity is larger than a preset oil quantity or not;
and if the current residual oil amount is larger than the preset oil amount, executing the step of sending a starting command to a motor controller to drive the engine to rotate by the motor.
6. The method for controlling the automatic start and stop of the engine of the hybrid loader according to any one of claims 1 to 5, wherein after judging whether a parking start signal is received, the method further comprises:
if the parking starting signal is not received, judging whether the current opening of an accelerator pedal is smaller than the preset opening and a lifting handle starting signal, a turning handle starting signal and a steering starting signal are not received in a preset time period;
and if so, executing the step of sending a flameout signal to an engine controller to enable the engine to be closed and enable the engine to be in a stop state of an automatic start-stop mode.
7. The utility model provides an automatic controlling means that stops of engine of hybrid loader which characterized in that includes:
the charge state judging module is used for judging whether the current charge state of the power battery is greater than or equal to a preset charge state or not when the engine is in an idle mode, the vehicle speed is 0 and the automatic start-stop switch is started;
the parking judging module is used for judging whether a parking starting signal is received or not if the current charge state of the power battery is larger than or equal to a preset charge state; the parking starting signal is an electronic parking braking starting signal or a hand brake pull-up signal;
the engine shutdown module is used for sending a flameout signal to an engine controller if the parking starting signal is received, so that the engine is shut down and is in a stop state of an automatic start-stop mode;
the starting judgment module is used for judging whether any preset starting condition of the automatic starting and stopping mode is met; wherein the preset starting condition comprises an accelerator pedal starting condition;
the motor starting module is used for sending a starting command to a motor controller if any preset starting condition of the automatic starting and stopping mode is met, and a motor drives the engine to rotate;
the engine starting module is used for sending an ignition signal to the engine controller when the actual rotating speed of the engine reaches the starting rotating speed corresponding to the preset starting condition, so that the engine is started and operates at the target rotating speed corresponding to the preset starting condition;
when the preset starting condition further comprises a power generation requirement starting condition, the starting judgment module comprises: a power generation demand starting judgment submodule;
the power generation demand start judgment submodule includes:
the charge state judging unit is used for judging whether the current charge state of the power battery is smaller than a preset charge state or not when the engine is in a stop state of an automatic start-stop mode;
the second gear judging unit is used for judging whether the current gear is the N gear or not if the current charge state of the power battery is smaller than the preset charge state;
the second oil quantity judging unit is used for judging whether the current remaining oil quantity is larger than the preset oil quantity or not if the current gear is the N gear; and if the current remaining oil amount is larger than the preset oil amount, sending a third starting signal to the engine shutdown module.
8. The automatic engine start-stop control device of the hybrid loader of claim 7, wherein the start-up determination module comprises: an accelerator pedal starting judgment submodule;
the accelerator pedal starting judgment submodule comprises:
the opening judgment unit is used for judging whether the current opening of an accelerator pedal is larger than or equal to a preset opening or not when the engine is in a stop state of the automatic start-stop mode;
the gear judging unit is used for judging whether the current gear is an N gear or not if the current opening of the accelerator pedal is larger than or equal to a preset opening;
the oil quantity judging unit is used for judging whether the current remaining oil quantity is larger than the preset oil quantity or not if the current gear is the N gear; and if the current remaining oil amount is larger than the preset oil amount, sending a first starting signal to the engine shutdown module.
9. The automatic engine start-stop control device of the hybrid loader according to claim 7 or 8, characterized by further comprising:
the automatic judgment module is used for judging whether the current opening of an accelerator pedal is smaller than the preset opening and a lifting handle starting signal, a rotating bucket handle starting signal and a steering starting signal are not received in the preset time period if the parking starting signal is not received; and if so, sending a second starting signal to the engine closing module.
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| CN111409645B (en) * | 2020-04-13 | 2021-04-27 | 宁波吉利汽车研究开发有限公司 | Control method and system for switching driving modes of hybrid vehicle |
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| CN101184660A (en) * | 2005-06-01 | 2008-05-21 | 丰田自动车株式会社 | Hybrid vehicle and control method of hybrid vehicle |
| JP2011089506A (en) * | 2009-10-26 | 2011-05-06 | Toyota Motor Corp | Engine control device |
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| JP3815096B2 (en) * | 1998-12-28 | 2006-08-30 | 日産自動車株式会社 | Brake operation detection method for idle stop system |
| JP3546735B2 (en) * | 1999-01-18 | 2004-07-28 | 日産自動車株式会社 | Engine start control device |
| DE10161449A1 (en) * | 2001-12-14 | 2003-06-26 | Fev Motorentech Gmbh | Operating internal combustion engine with filling lock involves inhibiting filling of fuel tank and/or engine starting if predefined minimum quantity in operating medium tank is reached |
| KR100836365B1 (en) * | 2006-10-19 | 2008-06-09 | 현대자동차주식회사 | Engine start method of vehicle having starter motor and ISG |
| JP2008284972A (en) * | 2007-05-16 | 2008-11-27 | Toyota Motor Corp | Automobile and control method therefor |
| JP5327012B2 (en) * | 2009-02-24 | 2013-10-30 | 日産自動車株式会社 | Idle stop control device and idle stop control method |
| JP5107333B2 (en) * | 2009-12-03 | 2012-12-26 | 三菱電機株式会社 | Control device for internal combustion engine |
| KR101241224B1 (en) * | 2011-08-11 | 2013-03-13 | 기아자동차주식회사 | Controlling method of starting motor for hybrid vehicle |
| JP2015110917A (en) * | 2013-12-06 | 2015-06-18 | いすゞ自動車株式会社 | Vehicle charging method, vehicle charging system, and vehicle |
| US10836372B2 (en) * | 2016-08-24 | 2020-11-17 | Ford Global Technologies, Llc | System and method for controlling a hybrid vehicle in park or neutral |
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| CN101184660A (en) * | 2005-06-01 | 2008-05-21 | 丰田自动车株式会社 | Hybrid vehicle and control method of hybrid vehicle |
| JP2011089506A (en) * | 2009-10-26 | 2011-05-06 | Toyota Motor Corp | Engine control device |
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