CN110541766A - A control method for a range extender engine, a control device, a vehicle, and a terminal - Google Patents

Abstract

The invention discloses a method for controlling an engine of a range extender. The method includes: acquiring the target output power of the range extender; acquiring the current temperature of the engine of the range extender; judging whether the current temperature is not less than a temperature threshold; if so, then The range extender engine is controlled to work at an output power one level lower than the target output power. The invention also discloses a range extender engine control device, a vehicle and a terminal with the device. Adopting the present invention has the advantages of being able to adapt to the working characteristics of the range extender, realizing a step-by-point point-by-point power limit; it can actively protect the engine of the range extender from overtemperature, and actively reduce the working power when the operating temperature of the engine is too high, etc. .

Description

A control method for a range extender engine, a control device, a vehicle, and a terminal

technical field

The present invention relates to an engine control method, in particular to a range extender engine control method, and also relates to a range extender engine control device, a vehicle and a terminal.

Background technique

The range extender can provide additional electric energy to enable the vehicle to travel farther. The range extender works at a fixed power point. The engine controller controls the engine system speed, and the generator controller controls the generator torque, all of which are calibrated in advance solidified, the two cooperate to achieve the corresponding power point work.

Most of the thermal protection function modules of the existing range extender continue or borrow the protection logic in the original engine controller, which is not suitable for the thermal protection of the range extender system, especially the thermal protection of the range extender engine. This is because the engine thermal protection of traditional fuel vehicles is controlled by the engine controller. When the intake air temperature or water temperature is too high, the torque is actively reduced to protect the engine. It can only achieve linear and gradual power limit; while the range extender is a fixed power Point work, the linear gradual power limit cannot adapt to its power point, resulting in poor thermal protection effect.

Contents of the invention

The technical problem to be solved by the present invention is to provide an engine control method for an adaptive range extender to improve its thermal protection capability.

In order to solve the above technical problems, the present invention discloses a method for controlling an engine of a range extender, the method comprising:

Obtain the target output power of the range extender;

Obtain the current temperature of the range extender engine;

judging whether the current temperature is not less than a temperature threshold;

If so, then controlling the range extender engine to work at an output power one level lower than the target output power;

Wherein, the range extender has multi-level constant power output power.

Further, the method also includes:

If the current temperature is less than a temperature threshold, the range extender engine is controlled to work at the target output power.

Further, said obtaining the target output power of the range extender includes:

Obtain the expected power of the vehicle controller;

A target output power corresponding to the range extender is determined according to the expected power.

Further, in determining the target output power corresponding to the range extender according to the expected power:

The target output power is the output power with the smallest absolute value of the difference from the expected power;

or,

The target output power is the output power that is a positive number and the smallest among differences from the expected power.

Further, the current temperature includes the temperature at the outlet of the range extender engine and the temperature at the throttle of the range extender engine.

Further, the judging whether the current temperature is not less than a temperature threshold includes:

judging whether the temperature at the liquid outlet is not less than a first temperature threshold;

It is judged whether the temperature at the throttle valve is not less than a second temperature threshold.

Correspondingly, the present invention also provides a range extender engine control device, said device comprising:

A power acquisition module, configured to acquire the target output power of the range extender;

The temperature acquisition module is used to acquire the current temperature of the range extender engine;

A judging module, configured to judge whether the current temperature is not less than a first threshold;

A processing module, configured to control the range extender engine to work at an output power one level lower than the target output power if the current temperature is not less than a first threshold.

Correspondingly, the present invention also provides a vehicle, which includes the above-mentioned engine control device for a range extender.

Further, the vehicle also includes a range extender controller and a vehicle controller,

The range extender engine control device is set in the range extender controller or in the vehicle controller.

Correspondingly, the present invention also provides a computer storage medium, at least one instruction, at least one section of program, code set or instruction set is stored in the storage medium, and the at least one instruction, at least one section of program, code set or instruction set The processor loads and executes the above-mentioned range extender engine control method.

Correspondingly, the present invention also provides a terminal, a processor, and a memory; wherein,

The processor is used to call and execute the program stored in the memory;

The memory is used to store a program, and the program is used to: obtain the target output power of the range extender; obtain the current temperature of the engine of the range extender; judge whether the current temperature is not less than a temperature threshold; if so, control the The throttle engine operates at an output power one step lower than the target output power.

Adopting the above-mentioned technical scheme has the following beneficial effects: the control method of the present invention can adapt to the working characteristics of the range extender, and realize step-by-step point-by-point power limit; Actively reduce the working power when the working temperature is too high; it can also actively feed back the thermal protection demand to the vehicle controller in advance, which can judge the working condition demand in advance and change the use demand for the range extender. Improving the reliability of the range extender can also increase the service life of the range extender engine.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the flowchart of the engine control method of the range extender of the present invention;

Fig. 2 is the flow chart of step S100 of the present invention;

Fig. 3 is a composition schematic diagram of the range extender engine control device of the present invention;

4 is a schematic diagram of the composition of the power acquisition module of the present invention;

Fig. 5 is a schematic diagram of the composition of the range extender of the present invention.

The following is a supplementary description of the attached drawings: 1 - range extender engine control device; 101 - power acquisition module; 1011 - expected power acquisition sub-module; 1012 - power determination module; 102 - temperature acquisition module; 103 - judgment module; 104 - Processing module; 2-range extender engine system; 201-range extender engine; 202-range extender engine controller; 3-generator system; 301-generator; 302-generator controller; 4-range extender controller.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure or characteristic that can be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom" etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. Also, the terms "first", "second", etc. are used to distinguish similar items and not necessarily to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein.

Example:

In order to solve the above technical problems, the present invention discloses a method for controlling the engine of a range extender, the range extender has a multi-stage constant power output power; it can be understood that the range extender has a multi-stage constant power output The power means that the output power of the range extender is a fixed value power, and can output multiple levels of power with different magnitudes. For example, the power of the range extender can be W ₁ , W ₂ , W ₃ , W ₄ , W ₅ and W ₆ ; wherein, W ₁ <W ₂ <W ₃ <W ₄ <W ₅ <W ₆ . Then, the method includes step S100 to step S400:

S100: Obtain the target output power of the range extender.

In some embodiments, the step S100 includes S110 to S120:

S110: Obtain the expected power of the vehicle controller;

S120: Determine the target output power corresponding to the range extender according to the expected power.

In some embodiments, in the step S120, the target output power is the output power with the smallest absolute value of the difference between the target output power and the expected power.

It can be understood that, if the expected power is Wa, the target power is |Wa-W ₁ |, |Wa-W ₂ |, |Wa-W ₃ |, |Wa-W ₄ |, |Wa- The power of the range extender corresponding to the minimum value of W ₅ | and |Wa-W ₆ |; assuming that |Wa-W ₃ | is the minimum value, the target output power is W ₃ .

In some other embodiments, in the step S120, the target output power is the output power that is a positive number and the smallest in the difference between the target output power and the expected power.

It can be understood that if the expected power is Wa, if W ₁ -Wa<0, W ₂ -Wa<0, W ₃ -Wa>0, W ₄ -Wa>0 and W ₅ -Wa>0, then If the difference between W ₃ −Wa is the smallest positive number, the target output power is W ₃ .

S200: Obtain the current temperature of the engine of the range extender.

In some embodiments, the current temperature includes the temperature at the outlet of the range extender engine and the temperature at the throttle of the range extender engine.

S300: Determine whether the current temperature is not less than a temperature threshold.

In some embodiments, the step S300 includes:

judging whether the temperature at the liquid outlet is not less than a first temperature threshold;

It is judged whether the temperature at the throttle valve is not less than a second temperature threshold.

It can be understood that the current temperature is to reflect the temperature that affects the operation of the engine of the range extender. Generally, the temperature of the engine of the range extender can be reflected by detecting the temperature at the liquid and the temperature at the throttle. For other specific situations, other corresponding temperatures can also be selected for detection.

S400: If yes, control the range extender engine to work at an output power one level lower than the target output power.

In some embodiments, in the step S400, if the current temperature is not less than the temperature threshold means: if the temperature at the liquid outlet is not less than the first temperature threshold; or the temperature at the throttle is not less than the second temperature threshold. That is, when any one of the temperature at the liquid outlet and the temperature at the throttle is greater than its corresponding threshold, step S400 is executed.

It can be understood that, the range extender has multi-level constant power output power, and the working with an output power one level lower than the target output power means that if the target output power _of the range extender is W3 , the output power of the lower level is W ₂ . Then, the range extender is controlled to work with the target of _outputting the power of W2.

Further, the range extender includes a range extender engine system 2, a generator system 3 and a range extender controller 4; the range extender engine system 2 includes a range extender engine 201 and a range extender engine controller 202 , the generator system 3 includes a generator 301 and a generator controller 302; the range extender engine 201 and the generator 301 are connected by a flywheel and a spline; the range extender controller 4 is connected to the The range extender engine controller 202 is connected to the generator controller 301 . The above _- mentioned range extender is controlled to work with the power of output W2 as the target, that is, the speed of the range extender engine 201 is controlled by the range extender engine controller 202 and the torque of the generator 301 is controlled by the generator controller 302, so that It works at the speed and torque corresponding to W ₂ to output that power.

Further, after the execution of step S400 is completed, re-detect the current temperature of the range extender engine, and if the current temperature is still not less than the temperature threshold, continue to reduce the level of the output power until it drops to idle speed.

In some embodiments, the method also includes the steps of:

If the current temperature is less than a temperature threshold, the range extender engine is controlled to work at the target output power.

It can be understood that if the current temperature is less than a temperature threshold, it means: if the temperature at the liquid outlet is less than a first temperature threshold; and the temperature at the throttle is less than a second temperature threshold.

Correspondingly, the present invention also provides a range extender engine control device 1, said device comprising:

A power acquisition module 101, configured to acquire the target output power of the range extender;

A temperature acquisition module 102, configured to acquire the current temperature of the range extender engine;

A judging module 103, configured to judge whether the current temperature is not less than a first threshold;

The processing module 104 is configured to control the range extender engine to work at an output power one level lower than the target output power if the current temperature is not less than a first threshold.

In some embodiments, the processing module 104 is further configured to control the range extender engine to work at the target output power if the current temperature is lower than a temperature threshold.

In some embodiments, the power acquisition module 101 includes:

The expected power acquisition sub-module 1011 is used to acquire the expected power of the vehicle controller;

A power determining module 1012, configured to determine the target output power corresponding to the range extender according to the expected power.

Correspondingly, the present invention also provides a vehicle, which includes any one of the above-mentioned range extender engine control devices.

Further, the vehicle also includes a range extender controller 4 and a vehicle controller,

The range extender engine control device is set in the range extender controller 4 or in the vehicle controller.

Correspondingly, the present invention also provides a computer storage medium, at least one instruction, at least one section of program, code set or instruction set is stored in the storage medium, and the at least one instruction, at least one section of program, code set or instruction set Any one of the above-mentioned range extender engine control methods is loaded and executed by the processor.

Correspondingly, the present invention also provides a terminal, a processor, and a memory; wherein,

The processor is used to call and execute the program stored in the memory;

The memory is used to store a program, and the program is used to: obtain the target output power of the range extender; obtain the current temperature of the engine of the range extender; judge whether the current temperature is not less than a temperature threshold; if so, control the The throttle engine operates at an output power one step lower than the target output power.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A range extender engine control method, is characterized in that, described method comprises: Obtain the target output power of the range extender; Obtain the current temperature of the range extender engine; judging whether the current temperature is not less than a temperature threshold; If so, then controlling the range extender engine to work at an output power one level lower than the target output power; Wherein, the range extender has multi-level constant power output power. 2. The range extender engine control method according to claim 1, wherein the method further comprises: If the current temperature is less than a temperature threshold, the range extender engine is controlled to work at the target output power. 3. The engine control method of the range extender according to claim 1, wherein said obtaining the target output power of the range extender comprises: Obtain the expected power of the vehicle controller; A target output power corresponding to the range extender is determined according to the expected power. 4. The engine control method of the range extender according to claim 3, characterized in that, in determining the target output power corresponding to the range extender according to the expected power: The target output power is the output power with the smallest absolute value of the difference from the expected power; or, The target output power is the output power that is a positive number and the smallest among differences from the expected power. 5 . The method for controlling the range extender engine according to claim 1 , wherein the current temperature includes the temperature at the outlet of the range extender engine and the temperature at the throttle of the range extender engine. 6. The engine control method for a range extender according to claim 5, wherein said judging whether said current temperature is not less than a temperature threshold comprises: judging whether the temperature at the liquid outlet is not less than a first temperature threshold; judging whether the temperature at the throttle is not less than a second temperature threshold; If the temperature at the liquid outlet is not less than the first temperature threshold, or the temperature at the throttle is not less than the second temperature threshold, then control the range extender engine to work at an output power one level lower than the target output power . 7. A range extender engine control device, characterized in that the device comprises: A power acquisition module (101), configured to acquire the target output power of the range extender; A temperature acquisition module (102), used to acquire the current temperature of the range extender engine; A judging module (103), configured to judge whether the current temperature is not less than a first threshold; A processing module (104), configured to control the range extender engine to work at an output power one level lower than the target output power if the current temperature is not less than a first threshold. 8. A vehicle, characterized in that the vehicle comprises the range extender engine control device (1) according to claim 7. 9. The vehicle according to claim 8, characterized in that the vehicle also comprises a range extender controller (4) and a vehicle controller, The range extender engine control device (1) is set in the range extender controller (4) or in the vehicle controller. 10. A terminal, characterized by a processor and a memory; wherein, The processor is used to call and execute the program stored in the memory; The memory is used to store a program, and the program is used to: obtain the target output power of the range extender; obtain the current temperature of the engine of the range extender; judge whether the current temperature is not less than a temperature threshold; if so, control the The throttle engine operates at an output power one step lower than the target output power.