Truck engine torque returning speed performance improving device and method and vehicle

Abstract

The invention provides a device and method for improving the torque returning speed performance of a truck engine and a vehicle, and belongs to the technical field of engine control. A vehicle controller is in communication connection with an accelerator pedal, an electromagnetic valve, an engine controller and a gearbox controller and is further used for monitoring vehicle running information in real time; and the starting time and the ending time of the current gear shifting torque recovery stage are judged and obtained based on the function state interval during the gear shifting operation. In the torque recovery process, the electromagnetic valve is controlled to spray air at proper time through preset control logic, so that the air inlet pressure is increased, the formation and combustion process of mixed gas in a cylinder is improved, the torque recovery speed is increased, the transient response performance and power output of the engine are improved, meanwhile, more gas enters a turbine through combustion, the driving force of the turbine is increased, and the service life of the engine is prolonged. And the turbine is helped to increase the rotating speed more quickly, stable air inflow is established, and the power output of the engine is further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of engine control, and in particular relates to a device and method for improving the torque recovery speed performance of a truck engine, and a vehicle. Background Art

[0002] In traditional truck power systems, torque fluctuation during gear shifting is a common problem. This is mainly caused by the temporary interruption or re-matching of power transmission between the engine and the gearbox during gear shifting. Specifically, when the driver performs a gear shift operation, the gears inside the gearbox need to be engaged or disengaged. During this process, the power output of the engine cannot be directly transmitted to the wheels, resulting in a temporary interruption or reduction of torque.

[0003] After the gear shift is completed, the intake system is difficult to provide sufficient intake pressure, and the turbine speed increases slowly. The engine torque recovery process is also slow. It can be seen that during the gear shift process, there is a brief interruption or reduction in torque, which will affect the vehicle's acceleration performance and the driver's driving experience. Especially in conditions that require quick response or heavy loads, if the torque recovery speed cannot be faster, the vehicle's operating efficiency and safety will be affected. Summary of the invention

[0004] The present invention provides a truck engine torque recovery speed performance improvement device, which can improve the mixture formation and combustion process in the cylinder, increase the torque recovery speed, and thus improve the transient response performance and power output of the engine.

[0005] The device includes: an engine, an accelerator pedal, a gearbox, an air compressor, an air storage tank, a solenoid valve, a vehicle controller, a turbine, an engine controller, and a gearbox controller;

[0006] The output end of the air compressor is connected to the input end of the air storage tank, and the output end of the air storage tank is connected to the engine intake pipe through a solenoid valve; the output end of the turbine is connected to the engine intake pipe; the exhaust pipe of the engine is connected to the exhaust end of the turbine;

[0007] The vehicle controller is respectively connected to the accelerator pedal, the solenoid valve, the engine controller and the transmission controller in communication, and the vehicle controller controls the intake pressure of the engine by controlling the operation of the solenoid valve;

[0008] The vehicle controller is also used to monitor the vehicle operation information in real time, and determine the start and end timing of the gear shift torque recovery phase based on the functional state interval during the gear shift operation.

[0009] It should be further explained that the functional state interval during the gear shift operation includes: when the gear selected position of the transmission and the actual gear position of the transmission change from different to the same, the gear shift is completed, and after a preset time has passed, it is defined as the functional state available interval;

[0010] The functional status unavailable interval is defined as the time when the actual gear position of the transmission changes and the preset time after the gear shift is completed.

[0011] It should be further explained that an air handling unit is provided between the air compressor and the air storage tank;

[0012] The vehicle controller is communicatively connected with the air handling unit and is used to control the gas flow between the air compressor and the gas storage tank.

[0013] It should be further explained that the vehicle operation information monitored by the vehicle controller includes: the opening signal of the accelerator pedal, the current vehicle speed, the engine speed, the engine torque and the fuel injection amount.

[0014] According to another embodiment of the present application, a method for improving the torque reduction speed performance of a truck engine is provided, the method comprising:

[0015] Real-time monitoring of vehicle operation information, and judging the start and end timing of the gear shift torque recovery phase based on the functional status interval during the gear shift operation;

[0016] Among them, the functional state interval during the gear shift operation includes: when the gear selected by the gearbox and the actual gear of the gearbox change from different to the same, the gear shift is completed, and after a preset time, it is defined as the functional state available interval;

[0017] When the clutch is in the available functional state range, the clutch engagement rate is greater than the engagement rate threshold, and the engine speed difference between the input shaft speed is within the preset speed difference threshold, it is judged to be the torque recovery stage.

[0018] It should be further noted that the method further includes: in the torque recovery stage, when the difference between the transmission torque limit signal and the actual engine percentage torque is greater than a first preset torque difference value, and the throttle opening is greater than the first preset throttle opening value, it is determined to be a torque recovery auxiliary stage;

[0019] In the torque recovery assist stage, when the ratio of the actual intake air volume to the theoretical intake air volume is less than the calibration value λ, the actual injection amount is limited and the torque recovery process is inhibited.

[0020] It should be further explained that, in the torque recovery stage, when the pressure in the air tank is greater than the safety pressure required for braking, the solenoid valve is controlled to open, so that the high-pressure gas in the air tank enters the cylinder through the engine intake pipe;

[0021] Control the intake volume F of high pressure gas from the gas storage tank into the cylinder t for

[0022]

[0023] A / F is the air-fuel ratio, λ is the calibration value, M fucl The amount of fuel injected.

[0024] It should be further explained that the required intake air volume in the engine cylinder is calculated as follows:

[0025]

[0026] F act is the actual jet volume.

[0027] It should be further explained that when the injection duration reaches the required intake volume F n , or when the throttle opening is less than the second preset throttle opening value, or exceeds the available range of the functional state, or the comprehensive braking torque percentage exceeds the preset braking torque, or the difference between the transmission torque limit and the actual torque percentage is less than the second preset torque difference, the solenoid valve is closed.

[0028] According to another embodiment of the present application, a vehicle is provided, including a device for improving the torque speed performance of a truck engine.

[0029] It can be seen from the above technical solutions that the present invention has the following advantages:

[0030] In the truck engine torque-speed performance improvement device involved in the present application, during the torque recovery process at the end of the engine gear shift, the solenoid valve is controlled by the preset control logic to timely inject air to increase the intake pressure, improve the mixture formation and combustion process in the cylinder, and increase the torque recovery speed, thereby improving the transient response performance and power output of the engine. At the same time, the combustion causes more gas to enter the turbine, increasing the driving force of the turbine, helping the turbine to increase the speed faster, and improving the power output of the engine. Thereby significantly improving the torque output and acceleration performance of the engine. The vehicle controller ensures the smooth transition of the engine torque during the gear shift process through real-time monitoring and precise control, reduces power interruption and frustration, and improves driving comfort and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0032] Figure 1 The schematic diagram of the device for improving the torque and speed performance of a truck engine is shown;

[0033] Figure 2 It is a schematic diagram of an embodiment of a device for improving the torque recovery speed performance of a truck engine. DETAILED DESCRIPTION

[0034] The following describes a specific implementation of the truck engine torque performance improvement device. For the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are provided to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details.

[0035] It should be understood that when used in the present specification, the term "includes" indicates the presence of the described features, integral bodies, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or their collections. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0036] It should be understood that the "one or more" mentioned in this application refers to one, two or more than two, and the "multiple" mentioned in this application refers to two or more. In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B. The "and / or" in this article is just a way to describe the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0037] In order to clearly describe the technical solution of the present application, the words "first", "second" and the like are used to distinguish the same or similar items with substantially the same functions and effects. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not necessarily limit the difference.

[0038] The phrases such as "one embodiment" or "some embodiments" described in the present application mean that the specific features, structures or characteristics described in the embodiment are included in one or more embodiments of the present application. Therefore, the phrases such as "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments" etc. that appear in different places in the present application do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1 The figure is a schematic diagram of a truck engine torque speed performance improvement device in a specific embodiment, the device includes: an engine, an accelerator pedal, a gearbox, an air compressor, an air tank, a solenoid valve, a vehicle controller, a turbine, an engine controller and a gearbox controller.

[0041] In this embodiment, the output end of the air compressor is connected to the input end of the air tank, and the output end of the air tank is connected to the engine intake pipe through a solenoid valve; the output end of the turbine is connected to the engine intake pipe; and the exhaust pipe of the engine is connected to the exhaust end of the turbine.

[0042] The vehicle controller is communicated with the accelerator pedal, solenoid valve, engine controller and transmission controller respectively. The vehicle controller controls the engine's intake pressure by controlling the operation of the solenoid valve. The vehicle controller is also used to monitor the vehicle's operating information in real time, and determine the start and end timing of the gear shift torque recovery phase based on the functional status interval during the gear shift operation.

[0043] As an example, the functional status interval during the gear shifting operation includes: when the transmission selected gear position and the actual gear position of the transmission change from different to the same, the gear shifting is completed, and after a preset time period, it is defined as the functional status available interval; when the actual gear position of the transmission changes, and within a preset time period after the gear shifting is completed, it is defined as the functional status unavailable interval.

[0044] More specifically, during the driving of the vehicle, the vehicle controller receives the signal sent by the transmission controller in real time. When the transmission shifts and a preset time has passed, it is defined as the available functional status interval.

[0045] Among them, when it is in the functional status available range, the clutch engagement rate is greater than the engagement rate threshold, and the engine speed and input shaft speed difference is within the preset speed difference threshold, it is judged to be the torque recovery stage.

[0046] In this embodiment, the air compressor works to deliver compressed air to the air storage tank, which serves as an intermediate buffer device to ensure that compressed air can be stably provided to the engine when needed.

[0047] The vehicle controller determines when it is necessary to increase the engine's intake pressure to increase torque by monitoring vehicle operating information in real time, including the position of the accelerator pedal, engine speed, vehicle speed, etc.

[0048] According to actual needs, the vehicle operation information monitored by the vehicle controller of this embodiment includes: the opening signal of the accelerator pedal, the current vehicle speed, the engine speed, the engine torque and the fuel injection amount.

[0049] When the vehicle controller determines that the gear shift torque recovery phase has begun, it sends a signal to the solenoid valve to control its opening, allowing the compressed air in the air tank to enter the engine intake pipe through the solenoid valve.

[0050] The turbine of this embodiment is driven by the exhaust energy of the engine, further increasing the amount of air entering the engine. The output end of the turbine is directly connected to the engine intake pipe, ensuring that when the solenoid valve is opened, it enters the engine together with the compressed air, thereby improving combustion efficiency.

[0051] The engine controller of this embodiment receives instructions from the vehicle controller and adjusts the engine's ignition advance angle, fuel injection amount and other parameters to adapt to the increased intake pressure and turbine assistance, ensuring that the engine runs in the best condition.

[0052] The transmission controller of this embodiment adjusts the gear shifting logic and timing of the transmission according to the instructions of the vehicle controller to ensure a smooth transition of the engine torque during the gear shifting process and reduce power loss.

[0053] According to the embodiment of the present application, the device increases the intake pressure of the engine to make combustion more complete, thereby significantly improving the torque output and acceleration performance of the engine. The vehicle controller ensures a smooth transition of the engine torque during the gear shifting process through real-time monitoring and precise control, reduces power interruption and frustration, and improves driving comfort and safety.

[0054] In summary, the truck engine torque and speed performance improvement device achieves effective improvement of engine torque and acceleration performance through the coordinated work of multiple components, improves fuel economy due to improved combustion efficiency and reduced power loss, and optimizes gear shifting smoothness, improves fuel economy and reduces emissions.

[0055] In some embodiments, Figure 2 As shown, an air processing unit is provided between the air compressor and the gas storage tank; the vehicle controller is communicatively connected with the air processing unit to control the gas flow between the air compressor and the gas storage tank.

[0056] The vehicle controller of this embodiment opens and closes different air paths in the air handling unit according to the actual air pressure. The air handling unit also has an air dryer. For example, when the pressure of the air tank reaches a preset value, the air path to the air tank will be closed, or the load will be actively unloaded, so that the air compressor no longer occupies the output power of the engine, reducing energy consumption.

[0057] The following is an embodiment of a method for improving the torque return speed performance of a truck engine provided by an embodiment of the present disclosure. This method and the truck engine torque return speed performance improvement device of the above-mentioned embodiments belong to the same inventive concept. For details not fully described in the embodiment of the method for improving the torque return speed performance of the truck engine, reference can be made to the embodiment of the above-mentioned truck engine torque return speed performance improvement device.

[0058] Methods include:

[0059] Real-time monitoring of vehicle operation information, and judging the start and end timing of the gear shift torque recovery phase based on the functional status interval during the gear shift operation;

[0060] Among them, the functional state interval during the gear shift operation includes: when the gear selected by the gearbox and the actual gear of the gearbox change from different to the same, the gear shift is completed, and after a preset time, it is defined as the functional state available interval;

[0061] When the clutch is in the available functional state range, the clutch engagement rate is greater than the engagement rate threshold, and the engine speed difference between the input shaft speed is within the preset speed difference threshold, it is judged to be the torque recovery stage.

[0062] In some embodiments, a torque recovery assist phase is also involved.

[0063] Specifically, in the torque recovery phase, when the difference between the transmission torque limit signal and the actual engine percentage torque is greater than a first preset torque difference, and the throttle opening is greater than a first preset throttle opening value, it is determined to be a torque recovery assist phase.

[0064] In the torque recovery assist stage, when the ratio of the actual intake air volume to the theoretical intake air volume is less than the calibration value λ, the actual injection amount is limited and the torque recovery process is inhibited.

[0065] In this embodiment, during the torque recovery stage, when the pressure in the air storage tank is greater than the safety pressure required for braking, the electromagnetic valve is controlled to open so that the high-pressure gas in the air storage tank enters the cylinder through the engine intake pipe.

[0066] In some embodiments, the torque recovery phase is a series of complex adjustments and optimization processes that the vehicle's power system undergoes to ensure that the engine can smoothly and efficiently recover to the expected torque output level. In the torque recovery phase, if it is detected that the difference between the transmission torque limit signal and the actual engine torque is greater than the first preset torque difference, and the throttle opening is greater than the first preset throttle opening value, it is determined that the torque recovery auxiliary phase has entered. In this way, the torque recovery process can be accelerated by auxiliary means to meet the driver's demand for power.

[0067] During the torque recovery assist phase, if the system detects that the ratio of the actual intake volume to the theoretical intake volume is less than the calibrated value λ, it means that the engine intake volume is insufficient due to limited throttle opening, blocked intake duct or other reasons. In order to avoid incomplete combustion and torque drop caused by insufficient intake, the actual injection volume will be limited to prevent the mixture from being too rich, thereby inhibiting the torque recovery process. The execution of this method can protect the engine from potential damage and ensure the safety and stability of the torque recovery process.

[0068] In this embodiment, during the torque recovery stage, when the pressure in the gas tank is greater than the safety pressure required for braking, the high-pressure gas in the gas tank is introduced into the engine intake pipe and then into the cylinder by controlling the opening of the solenoid valve. After the high-pressure gas enters the cylinder, the pressure and temperature in the cylinder can be increased, thereby improving the combustion efficiency and torque output. This can not only accelerate the torque recovery process, but also improve the power performance of the engine to a certain extent.

[0069] It can be seen that in the torque recovery stage, by accurately judging the start and end of the torque recovery auxiliary stage and adopting a reasonable control strategy to limit the injection amount and use the air tank pressure to assist torque recovery, the engine's power performance and response speed can be significantly improved, and the vehicle's fuel economy and emission performance can be improved.

[0070] In some specific embodiments, the amount of high pressure gas from the gas storage tank entering the cylinder is controlled. t for

[0071]

[0072] A / F is the air-fuel ratio, λ is the calibration value, M fucl The amount of fuel injected.

[0073] The required intake air volume in the engine cylinder is calculated as:

[0074]

[0075] F act is the actual jet volume.

[0076] In this embodiment, when the injection time reaches the required intake air volume F n , or when the throttle opening is less than the second preset throttle opening value, or exceeds the available range of the functional state, or the comprehensive braking torque percentage exceeds the preset braking torque, or the difference between the transmission torque limit and the actual torque percentage is less than the second preset torque difference, the solenoid valve is closed.

[0077] In this way, through the implementation of the above measures, the torque-speed performance of the truck engine can be effectively improved, and real-time monitoring of vehicle operation information and accurate judgment of the gear shift torque recovery stage can be achieved.

[0078] Further, as a refinement and expansion of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process in this embodiment, the method for improving the torque speed performance of a truck engine also involves the following specific steps:

[0079] The vehicle controller monitors the accelerator pedal position, vehicle speed, engine speed, engine torque, fuel injection amount and other signals in real time. When the gear selected by the transmission is different from the actual gear of the transmission during gear shifting, when the two change from different to the same, that is, within 4 seconds after the gear shift is completed, it is judged as a function available interval. When the gear selected by the transmission changes, it is judged as a function unavailable. At the same time, the vehicle controller determines the start and end time of the gear shift torque recovery phase based on the accelerator pedal opening signal, fuel injection amount, engine speed, engine torque and vehicle speed of the vehicle speed sensor and other signals.

[0080] In some embodiments, the vehicle controller receives signals sent by the transmission control unit in real time during vehicle driving. When the transmission is in the functionally available range 4 seconds after the gear shift is completed, the clutch engagement rate is greater than 93%, and the engine speed is within 20RPM of the input shaft speed, it is judged to be the torque recovery stage.

[0081] During the torque recovery stage, when the difference between the transmission torque limit signal and the actual engine percentage torque is greater than 7%, and the throttle opening is greater than 65%, it is judged to be the torque recovery auxiliary stage. At this time, because the combustion efficiency is too low, the ratio of the actual intake volume to the theoretical intake volume is less than the calibration value λ, and the actual fuel injection amount is limited, resulting in the actual percentage torque of the engine unable to fit the torque limit curve of the transmission, and the torque recovery process is inhibited.

[0082] When the conditions of the torque recovery stage are met and the air tank pressure is greater than the safety pressure required for braking, the vehicle controller controls the opening of the solenoid valve. At this time, the high-pressure gas in the air tank enters the cylinder through the engine intake pipe, thereby improving the combustion efficiency of the engine. Under the same fuel injection amount, higher combustion efficiency can produce more torque and enhance the dynamic response of the engine. At the same time, the increase in torque recovery speed enables the turbine to quickly build up intake pressure, thereby quickly accelerating.

[0083] Control the intake volume F of high pressure gas from the gas storage tank into the cylinder t for:

[0084]

[0085] Air intake F t Numerically equal to the air-fuel ratio A / F, the calibration value λ and the injection amount M fucl The product of the three. act is the actual jet volume, which is a comprehensive parameter obtained by looking up the table after considering factors such as turbine inlet pressure and engine structure; F n is the required air intake, which is equal to the air intake F t The actual intake volume F act The difference.

[0086] Based on the above calculation process, the vehicle controller can adjust the intake volume during the torque recovery phase to match the current fuel supply, ensuring that the combustion process is both efficient and environmentally friendly, thereby achieving optimal engine performance and emission standards.

[0087] When the injection time reaches the required air intake volume F n , the maximum volume of the air tank, and the current air pressure in the air tank, the injection duration obtained by looking up the table; or the throttle opening is less than 50%, or exceeds the functional available range, or the comprehensive braking torque (including brake pedal, retarder and cylinder brake) percentage exceeds 5%, or the difference between the transmission torque limit and the actual torque percentage is less than 5%, the solenoid valve is closed.

[0088] In the process of engine shift torque recovery, this embodiment controls the solenoid valve according to the above control logic to make it spray at the right time, thereby increasing the intake pressure, optimizing the formation and combustion process of the mixture in the cylinder, accelerating the torque recovery speed, and thus enhancing the transient response capability and power output of the engine. At the same time, more gas generated by combustion enters the turbine, enhancing the driving force of the turbine, prompting the turbine to increase the speed more quickly, building a stable intake volume, and further improving the power output level of the engine.

[0089] The present application also provides a vehicle, including a truck engine torque and speed performance improvement device.

[0090] Specifically, the vehicle includes: an engine, a clutch and a gearbox; it is characterized in that it also includes: an air compressor, an air tank, a solenoid valve, a vehicle controller, a turbine, an engine controller and a gearbox controller; the output end of the air compressor is connected to the input end of the air tank, and the output end of the air tank is connected to the engine intake pipe through the solenoid valve; the output end of the turbine is connected to the engine intake pipe; the exhaust pipe of the engine is connected to the exhaust end of the turbine; the vehicle controller is communicatively connected to the accelerator pedal, the solenoid valve, the engine controller and the gearbox controller respectively, and the vehicle controller controls the intake pressure of the engine by controlling the operation of the solenoid valve; the vehicle controller is also used to monitor the vehicle operation information in real time, and judge the start time and end time of the current gear shift torque recovery phase based on the functional state interval during the gear shift operation.

[0091] The vehicle connects an air tank controlled by a solenoid valve to the engine air intake. When the engine gear shift is completed and the torque is recovered, the solenoid valve is controlled by the preset control logic to spray air at the right time to increase the intake pressure, improve the mixture formation and combustion process in the cylinder, and increase the torque recovery speed, thereby improving the engine's transient response performance and power output. At the same time, combustion causes more gas to enter the turbine, increasing the driving force of the turbine, helping the turbine to increase the speed faster, establish a stable intake volume, and further improve the engine's power output.

[0092] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0093] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the equipment, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. Exemplarily, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of the boxes in the block diagram and / or the flowchart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0094] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0095] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring various aspects of the present invention.

[0096] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A truck engine torque reduction speed performance improvement device, comprising: Engine, accelerator pedal and gearbox; characterized in that it also includes: an air compressor, an air storage tank, a solenoid valve, a vehicle controller, a turbine, an engine controller and a gearbox controller; The output end of the air compressor is connected to the input end of the air storage tank, and the output end of the air storage tank is connected to the engine intake pipe through a solenoid valve; the output end of the turbine is connected to the engine intake pipe; the exhaust pipe of the engine is connected to the exhaust end of the turbine; The vehicle controller is respectively connected to the accelerator pedal, the solenoid valve, the engine controller and the transmission controller in communication, and the vehicle controller controls the intake pressure of the engine by controlling the operation of the solenoid valve; The vehicle controller is also used to monitor the vehicle operation information in real time, and determine the start and end timing of the gear shift torque recovery phase based on the functional state interval during the gear shift operation.

2. The truck engine torque reduction speed performance improvement device according to claim 1, characterized in that: The functional state interval during the gear shift operation includes: when the gear selected by the transmission and the actual gear of the transmission change from different to the same, the gear shift is completed, and after a preset time has passed, it is defined as the functional state available interval; The functional status unavailable interval is defined as the time when the actual gear position of the transmission changes and the preset time after the gear shift is completed.

3. The truck engine torque reduction speed performance improvement device according to claim 1, characterized in that: An air handling unit is provided between the air compressor and the air storage tank; The vehicle controller is communicatively connected with the air handling unit and is used to control the gas flow between the air compressor and the gas storage tank.

4. The truck engine torque reduction speed performance improvement device according to claim 1, characterized in that: The vehicle operation information monitored by the vehicle controller includes: the opening signal of the accelerator pedal, the current vehicle speed, the engine speed, the engine torque and the fuel injection amount.

5. A method for improving the torque reduction speed performance of a truck engine, characterized in that: The method is implemented based on the truck engine torque reduction speed performance improvement device according to any one of claims 1 to 4; Methods include: Real-time monitoring of vehicle operation information, and judging the start and end timing of the gear shift torque recovery phase based on the functional status interval during the gear shift operation; Among them, the functional state interval during the gear shift operation includes: when the gear selected by the gearbox and the actual gear of the gearbox change from different to the same, the gear shift is completed, and after a preset time, it is defined as the functional state available interval; When the clutch is in the available functional state range, the clutch engagement rate is greater than the engagement rate threshold, and the engine speed difference between the input shaft speed is within the preset speed difference threshold, it is judged to be the torque recovery stage.

6. The method for improving the torque recovery speed performance of a truck engine according to claim 5, characterized in that: The method further includes: in the torque recovery phase, when the difference between the transmission torque limit signal and the actual engine percentage torque is greater than a first preset torque difference value, and the throttle opening is greater than a first preset throttle opening value, determining that it is a torque recovery assist phase; In the torque recovery assist stage, when the ratio of the actual intake air volume to the theoretical intake air volume is less than the calibration value λ, the actual injection amount is limited and the torque recovery process is inhibited.

7. The method for improving the torque recovery speed performance of a truck engine according to claim 5, characterized in that: In the torque recovery stage, when the pressure in the air tank is greater than the safety pressure required for braking, the solenoid valve is controlled to open, so that the high-pressure gas in the air tank enters the cylinder through the engine intake pipe; Control the intake volume F of high pressure gas from the gas storage tank into the cylinder t for A / F is the air-fuel ratio, λ is the calibration value, M fucl The amount of fuel injected.

8. The method for improving the torque recovery speed performance of a truck engine according to claim 7, characterized in that: The required intake air volume in the engine cylinder is calculated as: F act is the actual jet volume.

9. The method for improving the torque recovery speed performance of a truck engine according to claim 8, characterized in that: When the injection time reaches the required air intake volume F n , or when the throttle opening is less than the second preset throttle opening value, or exceeds the available range of the functional state, or the comprehensive braking torque percentage exceeds the preset braking torque, or the difference between the transmission torque limit and the actual torque percentage is less than the second preset torque difference, the solenoid valve is closed.

10. A vehicle, characterized in that: It comprises the truck engine torque recovery speed performance improving device as described in any one of claims 1 to 4.

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