KR20160144566A - System for controlling a lock of differential gear in vehicle, and controlling method thereof - Google Patents
System for controlling a lock of differential gear in vehicle, and controlling method thereof Download PDFInfo
- Publication number
- KR20160144566A KR20160144566A KR1020150080771A KR20150080771A KR20160144566A KR 20160144566 A KR20160144566 A KR 20160144566A KR 1020150080771 A KR1020150080771 A KR 1020150080771A KR 20150080771 A KR20150080771 A KR 20150080771A KR 20160144566 A KR20160144566 A KR 20160144566A
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- KR
- South Korea
- Prior art keywords
- differential
- vehicle
- lock
- differential lock
- tire
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/04—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for differential gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/30—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means
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- B60K2023/04—
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- F16H2048/30—
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Retarders (AREA)
Abstract
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a differential gear lock system for a vehicle and a control method thereof, which can prevent a vehicle breakage by a differential gear by locking a differential gear when a tire air pressure of the vehicle is abnormal or during a puncture.
Generally, in order for the left and right wheels to smoothly rotate when the vehicle turns on the curve, the outer wheels must be faster and rotate more rapidly than the inner wheels, and the number of revolutions of the left and right wheels always changes Should not.
However, in the case where both wheels are connected with the same shaft to transmit power, this condition can not be satisfied. Therefore, the shaft is divided into two, left and right, and a differential gear is provided at the center thereof. These differential gears are divided into spur gears and bevel gears depending on the type of gear used, and bevel gears are widely used.
Since the differential action is caused by the difference in the rotational resistance of the left and right driving wheels and the wheel rotates according to the length of the road surface passing therethrough, the resistance of the inner wheel becomes larger than that of the outer wheel when the curve is turned, To accelerate the wheel of.
However, such a differential gear is a device required when the vehicle turns a curve, but when one of the wheels falls into a bog in running, the missing wheel receives little resistance and the other wheel receives the resistance of the road surface. Therefore, no power is transmitted to the wheels on the road surface, and the wheels in the boggling slip unnecessarily and the vehicle can not travel.
In such a case, if the action of the differential gear is stopped, the flood can be easily escaped. Therefore, a differential lock device or a differential limiting device is installed in a passenger car or a truck that frequently travels in bad roads.
In other words, 'differential lock device' is a device that stops the differential function when the vehicle falls into the rough (mud or sand), so that the driving force of the left and right wheels are equalized so that the slip does not occur and the rudder can escape easily.
On the other hand, there has been a problem in that even in a vehicle having a differential lock device, differential locking is not performed until a wheel speed difference is detected during a tire puncture accident or the driver senses and operates the vehicle, thereby driving the vehicle becomes unstable.
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a vehicle differential gear lock system which can prevent a loss of driving force or prevent a deterioration in vehicle driving performance by locking a differential gear at the time of abnormal tire air pressure of the vehicle, And a control method thereof.
According to an aspect of the present invention, there is provided a vehicle including: a differential lock portion that locks or releases a differential function of a vehicle according to a predetermined differential control signal; A tire sensing unit for sensing air pressure of a tire mounted on each wheel of the vehicle; And a controller for controlling the differential lock to be performed by applying a differential control signal to the differential lock when the air pressure of the tire mounted on any one of the four wheels is sensed to be lower than a predetermined value through the tire sensor A differential gear lock system of a vehicle is provided.
In addition, the differential lock portion includes a differential lock switch for locking or unlocking the differential function according to a user's ON or OFF switching operation.
The apparatus may further include a vehicle speed sensing unit for sensing a rotation speed of the tire mounted on each wheel of the vehicle.
When the rotational speed of any one of the four wheels is detected to be less than a predetermined value through the vehicle speed sensing unit, the control unit controls the differential lock to be performed by applying a differential control signal to the differential lock unit .
According to another aspect of the present invention, there is provided a differential gear lock control method for a vehicle, including: monitoring air pressure of each tire mounted on four wheels of a vehicle; And performing differential locking of the vehicle if the air pressure of the tire is below a certain value.
The monitoring may be a reception of the air pressure value measured by a TPMS (Tire Pressure Management System) installed in each of the tires.
The determination of the air pressure of the tire may be performed in a manner of determining whether the difference between the air pressure measurement value at the previous measurement time and the air pressure measurement value at the current measurement time exceeds a predetermined reference value.
Confirming the ON or OFF state of the differential lock; And stopping the differential lock of the vehicle when the differential lock is in an OFF state.
The differential lock switch of the hardware (HW) or the software (SW) for the differential lock is turned off according to the operation of the driver or the value indicating the differential lock prohibition is set to a flag or a counter, And turning off the differential lock in a manner of writing to the differential lock.
The step of stopping the differential lock is to stop the differential lock in such a manner as to operate a hardware shutoff switch for the operating path of the differential lock.
The step of executing the differential lock performs the differential lock according to a method of operating a hardware shutoff switch for the operation path of the differential lock.
According to the present invention, it is possible to prevent the driving force loss or prevent the deterioration of the driving performance of the vehicle by locking the differential gear when the tire air pressure of the vehicle is abnormal or during the puncture.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the overall configuration of a differential gear lock system of a vehicle according to an embodiment of the present invention; FIG.
FIG. 2 is a flowchart illustrating a differential gear lock control method for a vehicle according to an embodiment of the present invention. Referring to FIG.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.
In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.
Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.
If any part is referred to as being "on" another part, it may be directly on the other part or may be accompanied by another part therebetween. In contrast, when a section is referred to as being "directly above" another section, no other section is involved.
The terms first, second and third, etc. are used to describe various portions, components, regions, layers and / or sections, but are not limited thereto. These terms are only used to distinguish any moiety, element, region, layer or section from another moiety, moiety, region, layer or section. Thus, a first portion, component, region, layer or section described below may be referred to as a second portion, component, region, layer or section without departing from the scope of the present invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified and that the presence or absence of other features, regions, integers, steps, operations, elements, and / It does not exclude addition.
Terms indicating relative space such as "below "," above ", and the like may be used to more easily describe the relationship to other portions of a portion shown in the figures. These terms are intended to include other meanings or acts of the apparatus in use, as well as intended meanings in the drawings. For example, when inverting a device in the figures, certain parts that are described as being "below" other parts are described as being "above " other parts. Thus, an exemplary term "below" includes both up and down directions. The device can rotate at 90 degrees or another angle, and the term indicating the relative space is interpreted accordingly.
Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the overall configuration of a differential gear lock system of a vehicle according to an embodiment of the present invention; FIG.
1, a differential
The
The
The
The vehicle
When the rotational speed of any one of the four wheels is sensed to be lower than a predetermined value due to a puncture or the like through the vehicle
On the other hand, the
FIG. 2 is a flowchart illustrating a differential gear lock control method for a vehicle according to an embodiment of the present invention. Referring to FIG.
The differential
When the
Alternatively, when the gear is neutral and the axle is selected at low speed, the
Referring to FIG. 2, first, the
That is, the
Next, when the air pressure of the tire is less than a specific value (S220-Y), the
At this time, the operation of executing the differential lock can execute the differential lock according to the manner of operating the hardware shutdown switch for the operation path of the differential lock.
Here, the determination of the air pressure of the tire can be performed by a method of determining whether the difference between the air pressure measurement value at the previous measurement time and the air pressure measurement value at the current measurement time exceeds a predetermined standard.
On the other hand, if the differential lock is engaged and the vehicle escapes the hull, the differential lock must be released. In the embodiment of the present invention, when the
When the differential lock is turned off (S240-Y), the
That is, the
Next, the
At this time, the operation of stopping the differential lock can stop the differential lock by operating a hardware cutoff switch for the operation path of the differential lock.
Therefore, even if the wheel speed difference is sensed at one tire puncture of the vehicle or the driver does not sense and operate it, differential lock is automatically activated when the air pressure drop of the tire is detected through the TPMS, thereby preventing the vehicle drive performance or subsequent failure can do.
As described above, according to the present invention, it is possible to realize a differential gear lock system for a vehicle and a control method thereof, which can prevent a vehicle breakage by a differential gear by locking a differential gear when a tire air pressure of the vehicle is abnormal or during a puncture have.
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims and their equivalents. Only. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.
100: Differential gear lock system 110: Differential lock part
120: tire sensing unit 130: control unit
140: vehicle speed sensing unit 150: differential lock switch
Claims (11)
A tire sensing unit for sensing air pressure of a tire mounted on each wheel of the vehicle; And
A control unit for applying a differential control signal to the differential lock unit to control the differential lock to be performed when the pressure of the tire mounted on any one of the four wheels is detected to be lower than a predetermined value through the tire detection unit;
The differential gear lock system of the vehicle comprising:
Wherein the differential lock portion includes a differential lock switch for locking or unlocking the differential function according to a user's ON or OFF switching operation.
A vehicle speed sensing unit for sensing a rotation speed of a tire mounted on each wheel of the vehicle;
The differential gear lock system further comprising:
The control unit controls the differential lock to be performed by applying a differential control signal to the differential lock unit when the rotational speed of any one of the four wheels is detected to be less than a predetermined value through the vehicle speed sensor The differential gear lock system of the vehicle.
Performing a differential lock of the vehicle if the tire air pressure is below a certain value;
Wherein the differential gear lock control method comprises the steps of:
Wherein the monitoring comprises:
Wherein the air pressure value measured by a TPMS (Tire Pressure Management System) installed in each of the tires is received.
Wherein the determination of the air pressure of the tire is performed by a method of determining whether a difference between an air pressure measurement value at a previous measurement time and an air pressure measurement value at a current measurement time exceeds a predetermined reference value.
Confirming the ON or OFF state of the differential lock; And
Stopping the differential lock of the vehicle when the differential lock is in an OFF state;
Wherein the differential gear lock control method further comprises:
Before the confirming step is performed,
The differential lock is released by turning off the differential lock switch of the hardware (HW) or the software (SW) for the differential lock according to the operation of the driver, or writing a value indicating the differential lock inhibition to the flag, Off;
Wherein the differential gear lock control method further comprises:
Wherein the step of stopping the differential lock comprises:
And stopping the differential lock by operating a hardware disconnect switch for the operating path of the differential lock.
Wherein performing the differential locking comprises:
And the differential lock is executed in accordance with a manner of operating a hardware cut-off switch for an operating path of the differential lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150080771A KR101735451B1 (en) | 2015-06-08 | 2015-06-08 | System for controlling a lock of differential gear in vehicle, and controlling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150080771A KR101735451B1 (en) | 2015-06-08 | 2015-06-08 | System for controlling a lock of differential gear in vehicle, and controlling method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20160144566A true KR20160144566A (en) | 2016-12-19 |
| KR101735451B1 KR101735451B1 (en) | 2017-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150080771A KR101735451B1 (en) | 2015-06-08 | 2015-06-08 | System for controlling a lock of differential gear in vehicle, and controlling method thereof |
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| Country | Link |
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| KR (1) | KR101735451B1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090104123A (en) | 2007-01-30 | 2009-10-05 | 도요타 지도샤（주） | Controller for limited slip differential devices for vehicles |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010006217A (en) * | 2008-06-26 | 2010-01-14 | Toyota Motor Corp | Vehicle control device |
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2015
- 2015-06-08 KR KR1020150080771A patent/KR101735451B1/en active IP Right Grant
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090104123A (en) | 2007-01-30 | 2009-10-05 | 도요타 지도샤（주） | Controller for limited slip differential devices for vehicles |
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| Publication number | Publication date |
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| KR101735451B1 (en) | 2017-05-30 |
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