CN105620479B - A kind of control method and device of cruise - Google Patents
A kind of control method and device of cruise Download PDFInfo
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- CN105620479B CN105620479B CN201610086795.1A CN201610086795A CN105620479B CN 105620479 B CN105620479 B CN 105620479B CN 201610086795 A CN201610086795 A CN 201610086795A CN 105620479 B CN105620479 B CN 105620479B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 239000000446 fuel Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 abstract description 4
- 238000011217 control strategy Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/14—Adaptive cruise control
- B60W30/143—Speed control
- B60W30/146—Speed limiting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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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
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/606—Driving style, e.g. sporty or economic driving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
- F02D2700/07—Automatic control systems according to one of the preceding groups in combination with control of the mechanism receiving the engine power
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Controls For Constant Speed Travelling (AREA)
- Hybrid Electric Vehicles (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention provides a kind of control method and device of cruise, this method includes：When receiving cruise instruction caused by user's triggering cruise button, engine electric-controlled timing detection engine speed processed；When the engine speed is more than predetermined threshold value, the engine electric-controlled system call interception engine auxiliary braking power processed is to realize cruise.The device includes：Detection unit and power adjustment unit.The present invention does not need vehicle increase extra means, only by the improvement of engine control logic, you can cruise when realizing braking, and cruise when can realize heavy-duty car descending by changing engine auxiliary braking power in good time.
Description
Technical Field
The invention relates to the technical field of vehicle constant-speed cruising, in particular to a control method and a device for constant-speed cruising.
Background
Cruise control is a function that is often used by drivers during long distance driving. When the constant-speed cruise function is used, a driver selects the speed according to road conditions, and the constant-speed cruise system is started through the inching switch to replace the accelerator pedal control. And according to the influence of the ramp and road conditions on the vehicle speed, the fuel injection quantity is automatically adjusted, and the vehicle can automatically run at a fixed speed.
However, during downhill driving, there is a case where the engine does not inject fuel because the gradient is large. At this time, the conventional constant-speed cruise strategy cannot ensure that the vehicle runs at the preset speed. Particularly, the current heavy-duty automobile does not have a technical scheme for realizing constant-speed cruising at downhill, and in a heavy-duty commercial automobile, the following problems can exist by using a scheme for realizing constant-speed cruising at braking of a small automobile as a reference: 1) because the gravity and the inertia force of the heavy commercial automobile are large, the braking force of the friction work which is reversely dragged by the engine is not changed enough to realize constant-speed cruising; 2) a large number of executing devices need to be added to the whole vehicle.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a control method and a control device for constant-speed cruising, which can realize the constant-speed cruising in the downhill driving process of a vehicle by a simple control strategy of an engine without adding an additional device to the whole vehicle.
In a first aspect, the present invention provides a method for controlling a constant-speed cruise, the method comprising:
when a constant-speed cruise command generated by triggering a constant-speed cruise button by a user is received, an engine electric control system detects the rotating speed of an engine at fixed time;
when the engine speed is greater than a preset threshold value, the engine electric control system adjusts the auxiliary braking power of the engine to realize constant-speed cruising.
Preferably, the method further comprises:
and when the rotating speed of the engine is less than or equal to a preset threshold value, adjusting the fuel injection quantity of the engine to realize constant-speed cruising.
Preferably, the engine electric control system adjusts engine auxiliary braking power to achieve constant speed cruising, including:
the engine electric control system judges whether the auxiliary braking system is in an opening state;
if the auxiliary braking system is in a closed state, the engine electric control system starts the auxiliary braking system and adjusts the auxiliary braking power of the engine to realize constant-speed cruising;
and if the auxiliary braking system is in an opening state, the engine electric control system adjusts the auxiliary braking power of the engine to realize constant-speed cruising.
Preferably, the method further comprises:
and when the auxiliary braking power reaches the maximum value, if the rotating speed of the engine is detected to continuously rise, sending a prompt message to a user to prompt the user to step on a brake pedal for braking.
Preferably, the method further comprises:
when a braking instruction generated by triggering a brake pedal by a user is received, the engine electric control system judges whether the engine is in an engine auxiliary braking state;
if the engine is in the auxiliary braking state, continuing constant-speed cruising;
and if the engine auxiliary braking state is not achieved, stopping the constant-speed cruising.
Preferably, the method further comprises:
stopping constant-speed cruising when a constant-speed cruising ending instruction generated by triggering a constant-speed cruising button by a user is received; or,
and stopping constant-speed cruising when the clutch state change is detected.
In a second aspect, the present invention provides a control device for constant-speed cruising, the device comprising:
the detection unit is used for detecting the rotating speed of the engine at fixed time when receiving a fixed-speed cruising command generated by triggering a fixed-speed cruising button by a user;
and the power adjusting unit is used for adjusting the auxiliary braking power of the engine to realize constant-speed cruising when the rotating speed of the engine is greater than a preset threshold value.
Preferably, the apparatus further comprises: an injection quantity adjusting unit for:
and when the rotating speed of the engine is less than or equal to a preset threshold value, adjusting the fuel injection quantity of the engine to realize constant-speed cruising.
Preferably, the power adjusting unit is specifically configured to:
judging whether the auxiliary braking system is in an opening state or not;
if the auxiliary braking system is in a closed state, the auxiliary braking system is started, and the auxiliary braking power of the engine is adjusted to realize constant-speed cruising;
and if the auxiliary braking system is in an opening state, adjusting the auxiliary braking power of the engine to realize constant-speed cruising.
Preferably, the apparatus further comprises: a prompt unit to:
and when the auxiliary braking power reaches the maximum value, if the rotating speed of the engine is detected to continuously rise, sending a prompt message to a user to prompt the user to step on a brake pedal for braking.
According to the technical scheme, the engine speed is detected at regular time, and when the engine speed is greater than the preset threshold value, the auxiliary braking power of the engine is timely adjusted to achieve cruise at a constant speed. Therefore, the invention continuously adjusts the auxiliary braking power according to different working conditions through logic control, thereby realizing constant-speed cruise driving when the heavy-duty car runs downhill, the control strategy is simple, no additional device is needed to be added to the whole car, the constant-speed cruise during braking can be realized only through the improvement of the control logic of the engine, and the constant-speed cruise when the heavy-duty car runs downhill can be realized by timely changing the auxiliary braking power of the engine.
Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart illustrating a method for controlling cruise control according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for controlling cruise control according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control device for constant-speed cruising according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Fig. 1 is a schematic flow chart of a method for controlling constant-speed cruise in an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
s101: and when a constant-speed cruise command generated by triggering a constant-speed cruise button by a user is received, the engine electric control system detects the rotating speed of the engine at fixed time.
Specifically, after a button of the constant-speed cruise is turned on, a cruise control assembly reads a pulse signal sent by a vehicle speed sensor and compares the pulse signal with a set speed, and an instruction is sent out through accurate calculation, so that the vehicle is guaranteed to run at the set speed. Meanwhile, the engine electric control system detects the rotating speed of the engine in real time, judges whether the rotating speed of the engine exceeds a preset threshold value or not, and avoids the situation that the constant-speed cruise cannot be realized due to the fact that the engine stops injecting oil.
S102: when the engine speed is greater than a preset threshold value, the engine electric control system adjusts the auxiliary braking power of the engine to realize constant-speed cruising.
Specifically, when the engine speed is greater than a preset threshold, the engine stops injecting fuel, for example, when the engine speed is greater than 1200 revolutions, the fuel injector stops injecting fuel, and at this time, the vehicle cannot drive at a preset vehicle speed by adjusting the fuel injection amount of the engine, that is, the constant-speed cruising cannot be achieved. Therefore, the constant-speed cruising is realized by adjusting the magnitude of the auxiliary braking power of the engine. Understandably, the greater the engine auxiliary braking power, the lower the engine speed and the lower the vehicle speed. The rotation speed of the engine and the speed of the vehicle can be controlled by controlling the auxiliary braking power of the engine, so that the vehicle can run at a set speed to realize constant-speed cruising. Specifically, when the engine speed is greater than a preset threshold value, the engine auxiliary braking system is controlled to increase auxiliary braking power so as to reduce the engine speed, and then the vehicle speed is reduced to a set speed, and constant-speed cruising is achieved.
For example, the engine auxiliary braking system may be butterfly valve braking. The principle and the structure of the butterfly valve brake are relatively simpler, after the butterfly valve brake is used, the butterfly valve rotates to block the exhaust pipe, controllable back pressure is formed in an engine cylinder, so that the power consumption of the exhaust stroke of the engine is increased, the engine is forced to reduce the rotating speed, and the purpose of reducing the speed of the vehicle in a short time is achieved. The exhaust butterfly valve has the advantages of relatively simple structure, high cost performance and lowest braking effect.
It should be noted that besides the above-mentioned engine auxiliary braking system, other retarder products, such as an eddy current retarder, a hydrodynamic retarder, if effectively combined with the cruise control strategy of the engine in the above-mentioned embodiment. The intelligent control of the braking power is realized, and the function of stabilizing the cruising speed on the downhill can also be realized.
Therefore, in the embodiment, the engine speed is detected at regular time, and when the engine speed is greater than the preset threshold value, the auxiliary braking power of the engine is timely adjusted to realize cruise at constant speed. Therefore, the auxiliary braking power is continuously adjusted through logic control according to different working conditions, so that the constant-speed cruise running on the downhill is realized, the control strategy is simple, an additional device is not needed to be added to the whole vehicle, the constant-speed cruise running on the braking can be realized only through the improvement of the control logic of the engine, and the constant-speed cruise running on the downhill of the heavy vehicle can be realized by timely changing the auxiliary braking power of the engine.
In this embodiment, the method further includes the following steps not shown in fig. 1:
s103: and when the rotating speed of the engine is less than or equal to a preset threshold value, adjusting the fuel injection quantity of the engine to realize constant-speed cruising.
Specifically, when the rotating speed of the engine is smaller than or equal to a preset threshold value, the cruise control assembly reads a pulse signal sent by the vehicle speed sensor and compares the pulse signal with a set speed, and an instruction is sent out through accurate calculation, so that the accurate oil supply of the vehicle at the set speed is ensured, and the cruise control of the vehicle is realized.
It should be noted that, if the cruise speed needs to be changed during constant-speed cruise, the cruise speed can be increased or decreased by the cruise speed adjusting button.
In a preferred embodiment of the present invention, as shown in fig. 2, the method for controlling constant-speed cruise in this embodiment specifically includes the following steps:
s201: and when a constant-speed cruise command generated by triggering a constant-speed cruise button by a user is received, the engine electric control system detects the rotating speed of the engine at fixed time.
S202: and judging whether the engine speed is greater than a preset threshold value, if so, turning to a step S203, and otherwise, turning to a step S206.
S203: and the engine electric control system judges whether the auxiliary braking system is in an opening state, if the auxiliary braking system is in the opening state, the step is switched to the step S205, and if not, the step is switched to the step S204.
S204: the engine electrical control system turns on the auxiliary braking system and proceeds to step S205.
S205: the engine electrical control system adjusts engine auxiliary braking power to achieve constant speed cruise.
S206: and adjusting the fuel injection quantity of the engine to realize constant-speed cruising.
Therefore, in the embodiment, when the engine electric control system adjusts the auxiliary braking power of the engine to realize constant-speed cruise, whether the auxiliary braking system is in an open state needs to be judged firstly, and if the auxiliary braking system is in the open state, the engine electric control system adjusts the auxiliary braking power of the engine to realize constant-speed cruise; if the auxiliary braking system is in a closed state, the auxiliary braking system needs to be automatically started so as to adjust the auxiliary braking power of the engine to realize constant-speed cruising. Therefore, the process of adjusting the auxiliary braking power is more automatic, manual operation is not needed, and user experience is improved.
In a preferred embodiment of the invention, the method further comprises the steps of:
and when the auxiliary braking power reaches the maximum value, if the rotating speed of the engine is detected to continuously rise, sending a prompt message to a user to prompt the user to step on a brake pedal for braking.
Specifically, the auxiliary braking power of the engine is limited to the maximum value, when the auxiliary power reaches the maximum value and the vehicle speed or the engine speed continues to rise, the driver is reminded to step on the brake pedal, and the auxiliary braking power is kept at the maximum power value. Therefore, the braking force of the vehicle is increased by stepping on the brake pedal, so that the rotating speed of the engine or the vehicle speed does not continuously rise any more, the vehicle is kept at the set speed, and the constant-speed cruising is realized.
Further, if the constant speed cruise function needs to be released, the control method for constant speed cruise in the above embodiment may further include the following steps:
a01, when a braking instruction generated by triggering a brake pedal by a user is received, judging whether the engine is in an engine auxiliary braking state by the engine electric control system;
a02, if the engine is in the auxiliary braking state, continuing constant-speed cruising;
and A03, stopping constant-speed cruising if the engine auxiliary braking state is not achieved.
Therefore, when the automobile runs and needs to step on the brake pedal in case of emergency, the engine electric control system judges whether the automobile is in the auxiliary braking state of the engine, if so, the automobile continues cruise at constant speed, and otherwise, the cruise at constant speed is finished.
Alternatively, in addition to the method of contacting the cruise control function by depressing the brake pedal in the above embodiment, the release of the cruise control function may be achieved by:
b01, stopping constant-speed cruising when receiving a constant-speed cruising ending instruction generated by triggering a constant-speed cruising button by a user; or,
and C01, stopping constant-speed cruising when the clutch state change is detected.
Therefore, the constant-speed cruise function can be released in various modes such as closing the constant-speed cruise button, changing the clutch state or stepping on the brake pedal (the auxiliary brake of the engine needs to be in a closed state), and the like, so that a user can conveniently and quickly stop the constant-speed cruise.
Fig. 3 is a schematic structural diagram of a control device for constant-speed cruising according to an embodiment of the present invention, as shown in fig. 3, the device includes: a detection unit 301 and a power adjustment unit 302. Wherein:
the detection unit 301 is used for detecting the rotating speed of the engine at regular time when receiving a constant-speed cruise command generated by triggering a constant-speed cruise button by a user;
and the power adjusting unit 302 is used for adjusting the auxiliary braking power of the engine to realize constant-speed cruising when the rotating speed of the engine is greater than a preset threshold value.
Therefore, in the embodiment, the detection unit 301 detects the engine speed at regular time, and when the engine speed is greater than the preset threshold, the power adjustment unit 302 adjusts the auxiliary braking power of the engine timely to achieve cruise control. Therefore, the auxiliary braking power is continuously adjusted through logic control according to different working conditions, so that the constant-speed cruise running on the downhill is realized, the control strategy is simple, an additional device is not needed to be added to the whole vehicle, the constant-speed cruise running on the braking can be realized only through the improvement of the control logic of the engine, and the constant-speed cruise running on the downhill of the heavy vehicle can be realized by timely changing the auxiliary braking power of the engine.
In this embodiment, the apparatus further includes: an injection quantity adjusting unit for:
and when the rotating speed of the engine is less than or equal to a preset threshold value, adjusting the fuel injection quantity of the engine to realize constant-speed cruising.
Specifically, the power adjusting unit 302 is specifically configured to:
judging whether the auxiliary braking system is in an opening state or not;
if the auxiliary braking system is in a closed state, the auxiliary braking system is started, and the auxiliary braking power of the engine is adjusted to realize constant-speed cruising;
and if the auxiliary braking system is in an opening state, adjusting the auxiliary braking power of the engine to realize constant-speed cruising.
Preferably, the apparatus further comprises: a prompt unit to:
and when the auxiliary braking power reaches the maximum value, if the rotating speed of the engine is detected to continuously rise, sending a prompt message to a user to prompt the user to step on a brake pedal for braking.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the device embodiment.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A method of controlling a cruise control, the method comprising:
when a constant-speed cruise command generated by triggering a constant-speed cruise button by a user is received, an engine electric control system detects the rotating speed of an engine at fixed time;
when the engine speed is greater than a preset threshold value, the engine electric control system adjusts the auxiliary braking power of the engine to realize constant-speed cruising;
when the auxiliary braking power reaches the maximum value, if the fact that the rotating speed of the engine continuously rises is detected, a prompt message is sent to a user to prompt the user to step on a brake pedal to brake
Correspondingly, the method further comprises:
when a braking instruction generated by triggering a brake pedal by a user is received, the engine electric control system judges whether the engine is in an engine auxiliary braking state;
if the engine is in the auxiliary braking state, continuing constant-speed cruising;
and if the engine auxiliary braking state is not achieved, stopping the constant-speed cruising.
2. The method of claim 1, further comprising:
and when the rotating speed of the engine is less than or equal to a preset threshold value, adjusting the fuel injection quantity of the engine to realize constant-speed cruising.
3. The method of claim 1, wherein the engine electric control system adjusting engine auxiliary braking power to achieve constant speed cruise, comprising:
the engine electric control system judges whether the auxiliary braking system is in an opening state;
if the auxiliary braking system is in a closed state, the engine electric control system starts the auxiliary braking system and adjusts the auxiliary braking power of the engine to realize constant-speed cruising;
and if the auxiliary braking system is in an opening state, the engine electric control system adjusts the auxiliary braking power of the engine to realize constant-speed cruising.
4. The method of claim 1, further comprising:
stopping constant-speed cruising when a constant-speed cruising ending instruction generated by triggering a constant-speed cruising button by a user is received; or,
and stopping constant-speed cruising when the clutch state change is detected.
5. A control device for cruise control, characterized in that it comprises:
the detection unit is used for detecting the rotating speed of the engine at fixed time when receiving a fixed-speed cruising command generated by triggering a fixed-speed cruising button by a user;
the power adjusting unit is used for adjusting the auxiliary braking power of the engine to realize constant-speed cruising when the rotating speed of the engine is greater than a preset threshold value;
wherein, the device still includes: a prompt unit to:
when the auxiliary braking power reaches the maximum value, if the fact that the rotating speed of the engine continues to rise is detected, a prompt message is sent to a user to prompt the user to step on a brake pedal for braking;
correspondingly, the device also comprises: a determination unit configured to:
when a braking instruction generated by triggering a brake pedal by a user is received, judging whether the engine is in an auxiliary braking state;
if the engine is in the auxiliary braking state, continuing constant-speed cruising;
and if the engine auxiliary braking state is not achieved, stopping the constant-speed cruising.
6. The apparatus of claim 5, further comprising: an injection quantity adjusting unit for:
and when the rotating speed of the engine is less than or equal to a preset threshold value, adjusting the fuel injection quantity of the engine to realize constant-speed cruising.
7. The apparatus of claim 5, wherein the power adjustment unit is specifically configured to:
judging whether the auxiliary braking system is in an opening state or not;
if the auxiliary braking system is in a closed state, the auxiliary braking system is started, and the auxiliary braking power of the engine is adjusted to realize constant-speed cruising;
and if the auxiliary braking system is in an opening state, adjusting the auxiliary braking power of the engine to realize constant-speed cruising.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086795.1A CN105620479B (en) | 2016-02-16 | 2016-02-16 | A kind of control method and device of cruise |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610086795.1A CN105620479B (en) | 2016-02-16 | 2016-02-16 | A kind of control method and device of cruise |
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| CN105620479A CN105620479A (en) | 2016-06-01 |
| CN105620479B true CN105620479B (en) | 2018-03-13 |
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| CN105620479A (en) | 2016-06-01 |
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