JPH0581626U - Vehicle different diameter tire determination device - Google Patents
Vehicle different diameter tire determination deviceInfo
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- JPH0581626U JPH0581626U JP2070792U JP2070792U JPH0581626U JP H0581626 U JPH0581626 U JP H0581626U JP 2070792 U JP2070792 U JP 2070792U JP 2070792 U JP2070792 U JP 2070792U JP H0581626 U JPH0581626 U JP H0581626U
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- vehicle
- vehicle height
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- diameter tire
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Abstract
(57)【要約】
【目的】 異径タイヤが装着されていると判断されるま
での検出速度を迅速ならしめる。
【構成】 車両走行時に車高検出手段Ａにより周期的に
検出された各車輪の車高の検出値を平均化手段Ｂにより
平均化処理した各車輪相互間の車高差が所定値以上で、
かつ、該平均化処理された車高差が車両を所定時間走行
させても収束しない場合には、異径タイヤ判定手段Ｃに
より車両に異径タイヤが装着されていると判定される。
これにより、異径タイヤ判定における判定時間が短縮さ
れる。また、車高値を平均化処理して車高差が求められ
るため、凹凸路面における走行時においても異径タイヤ
の判定ができ、判定能力が向上する。
(57) [Summary] [Purpose] To speed up the detection speed until it is determined that a tire with a different diameter is installed. A vehicle height difference between respective wheels obtained by averaging detected values of vehicle heights of respective wheels periodically detected by vehicle height detection means A when the vehicle is running by averaging means B is a predetermined value or more,
If the averaged vehicle height difference does not converge even after the vehicle has been running for a predetermined time, the different diameter tire determination means C determines that the vehicle has different diameter tires.
As a result, the determination time in the different diameter tire determination is shortened. Further, since the vehicle height difference is obtained by averaging the vehicle height values, it is possible to determine a tire having a different diameter even during traveling on an uneven road surface, and the determination ability is improved.
Description
【０００１】[0001]
本考案は、車両の異径タイヤ判定装置に関し、特に、異径タイヤ判定における 判定時間を短縮させると共に判定能力を向上させた技術に関する。 The present invention relates to a vehicle different-diameter tire determination device, and more particularly to a technique that shortens the determination time in the different-diameter tire determination and improves the determination ability.
【０００２】[0002]
従来、トルクスリップ式４ＷＤやアンチスキッドシステムの駆動輪制御におい ては、滑りやすい路面や不整地での機動性及び安全性を高めるため、各車輪の夫 々の回転速度を検出することにより各車輪のスリップ状態を判別し、タイヤと路 面間の最大摩擦力を保持するように、即ち、駆動輪のスリップ率を目標値となる ようにトランスファーやブレーキパットの制御を行なっていた。 Conventionally, in the drive wheel control of the torque slip type 4WD and the anti-skid system, in order to improve maneuverability and safety on slippery roads and rough terrain, each wheel is detected by detecting its rotation speed. The slip and the brake pads are controlled so that the maximum frictional force between the tire and the road surface is maintained, that is, the slip ratio of the driving wheels reaches the target value.
【０００３】 そして、制御輪は、方向安定性を重視する場合には、後輪制御システムとし、 操舵も可能とするためには、前輪も制御する４輪制御システムとしていた。 しかし、車両は一般に、タイヤのパンク等の緊急用に、常用タイヤに比べて幅 及び径が小さい応急用のスペアタイヤを装備しており、応急措置として該スペア タイヤを装着して使用した場合には、タイヤの径が他の常用タイヤと異なるため 、常用タイヤとの回転速度差を生じ、それにより、各車輪の回転速度に基づく上 記の駆動輪制御が正常に行なわれず、滑りやすい路面や不整地での車両の機動性 及び安全性を悪化させるといった問題点があった。The control wheels have a rear wheel control system when importance is attached to directional stability, and a four-wheel control system which also controls front wheels to enable steering. However, vehicles are generally equipped with emergency spare tires having a smaller width and diameter than regular tires for emergencies such as tire punctures. Since the tire diameter is different from that of other service tires, there is a difference in rotation speed from that of service tires.This prevents the above-mentioned drive wheel control based on the rotation speed of each wheel from being performed normally, and There was a problem that the mobility and safety of the vehicle on rough terrain deteriorated.
【０００４】 そのため、通常、コントロールユニットにより、駆動輪制御を行なっているが 、上記各車輪の回転速度差が所定時間が経っても収束しない場合には、異径タイ ヤが装着されていると判断し、各車輪の回転速度に基づく正規の駆動輪制御動作 を中止して、システムをフェールセーフ側に移行することにより、システムが安 全側に作動するように制御を行なっていた。Therefore, although the control unit normally controls the drive wheels, if the difference in the rotational speeds of the wheels does not converge even after a predetermined time, a different diameter tire is installed. Judgment was made, the regular drive wheel control operation based on the rotation speed of each wheel was stopped, and the system was switched to the fail-safe side, so that the system was controlled to operate on the safe side.
【０００５】[0005]
【考案が解決しようとする課題】 しかし、かかる車両の異径タイヤの判定においては、各車輪の回転速度差が所 定時間が経って収束し、異径タイヤが装着されていると判断されるまでに時間が かかり、検出速度が遅いといった問題点があった。 そこで、本考案はかかる従来の問題点に鑑みなされたものであり、異径タイヤ が装着されていると判断されるまでの検出速度を迅速ならしめた車両の異径タイ ヤ判定装置を提供することを目的とする。However, in the determination of the different-diameter tire of such a vehicle, it is determined that the different-diameter tire is attached, because the rotational speed difference of each wheel converges after a predetermined time. However, there was a problem that it took a long time until the detection speed was slow. Therefore, the present invention has been made in view of the above conventional problems, and provides a vehicle different diameter tire determination device that speeds up the detection speed until it is determined that a different diameter tire is mounted. The purpose is to
【０００６】[0006]
かかる目的を達成するために、本考案は、以下に示す（１）及び（２）の構成 とする。 （１）図１に示すように、各車輪の回転中心から車体までの高さを車高として 検出する車高検出手段Ａと、車両走行時に前記車高検出手段Ａにより周期的に検 出された各車輪に対する車高の検出値を平均化処理する平均化手段Ｂと、前記平 均化手段Ｂにより平均化処理された各車輪相互間の車高差が所定値以上で、かつ 、該平均化処理された車高差が車両を所定時間走行させても収束しない場合に、 車両に異径タイヤが装着されていると判定する異径タイヤ判定手段Ｃとを備える 。 In order to achieve such an object, the present invention has the following configurations (1) and (2). (1) As shown in FIG. 1, vehicle height detection means A for detecting the height from the center of rotation of each wheel to the vehicle body as vehicle height, and the vehicle height detection means A for periodically detecting the vehicle while the vehicle is traveling. The averaging means B for averaging the vehicle height detection values for the respective wheels, and the vehicle height difference between the respective wheels averaged by the averaging means B is not less than a predetermined value, and the averaging is performed. Different-diameter tire determination means C for determining that a different-diameter tire is mounted on the vehicle when the vehicle height difference subjected to the conversion processing does not converge even if the vehicle is run for a predetermined time.
【０００７】 （２）図２に示すように、各車輪の回転中心から車体までの高さを車高として 検出する車高検出手段Ａと、各車輪の車輪速を検出する車輪速検出手段Ｄと、車 両の発進直前に前記車高検出手段Ａにより検出された車高に基づき得られる各車 輪相互間の車高差が所定値以上で、かつ、車両の発進後に前記車輪速検出手段Ｄ により検出された車輪速に基づき前記車高差がある車輪間に車輪速差がある場合 には、車両に異径タイヤが装着されていると判定する異径タイヤ判定手段Ｅとを 備える。(2) As shown in FIG. 2, vehicle height detection means A for detecting the height from the center of rotation of each wheel to the vehicle body as vehicle height, and wheel speed detection means D for detecting the wheel speed of each wheel. And a vehicle height difference between the respective wheels obtained based on the vehicle height detected by the vehicle height detecting means A immediately before the vehicle starts, and the wheel speed detecting means after the vehicle starts. When there is a wheel speed difference between the wheels having the vehicle height difference based on the wheel speed detected by D 1, different diameter tire determination means E for determining that a vehicle has a different diameter tire is provided.
【０００８】[0008]
かかる構成によれば、以下に示すような（１）及び（２）の作用を生じること ができる。 （１）請求項１に記載の考案においては、車高検出手段Ａが各車輪の回転中心 から車体までの高さを車高として検出すると共に、平均化手段Ｂが車両走行時に 前記車高検出手段Ａにより周期的に検出された各車輪に対する車高の検出値を平 均化処理する。 With this configuration, the following effects (1) and (2) can be produced. (1) In the invention according to claim 1, the vehicle height detection means A detects the height from the center of rotation of each wheel to the vehicle body, and the averaging means B detects the vehicle height when the vehicle is traveling. The detected value of the vehicle height for each wheel, which is periodically detected by the means A, is averaged.
【０００９】 そして、前記平均化手段Ｂにより平均化処理された各車輪相互間の車高差が所 定値以上で、かつ、該平均化処理された車高差が車両を所定時間走行させても収 束しない場合には、異径タイヤ判定手段Ｃにより車両に異径タイヤが装着されて いると判定される。 これにより、異径タイヤ判定における判定時間が短縮されると共に車高値を平 均化処理して車高差が求められるため、凹凸路面における走行時においても異径 タイヤの判定ができ、判定能力が向上する。Even if the vehicle height difference between the wheels averaged by the averaging means B is equal to or larger than a predetermined value and the averaged vehicle height difference causes the vehicle to travel for a predetermined time. If they do not converge, the different-diameter tire determination means C determines that the vehicle has different-diameter tires. As a result, the judgment time for different-diameter tire judgment is shortened, and the vehicle height difference is calculated by equalizing the vehicle height value. improves.
【００１０】 したがって、例えば、システムをいち早くフェールセーフ側に移行させれば、 他のタイヤとの回転速度差のために、駆動輪制御が正常に行なわれず、そのため に、滑りやすい路面や不整地での車両の機動性及び安全性を悪化させるといった 問題が生じることはない。 （２）請求項２に記載の考案においては、車高検出手段Ａが各車輪の回転中心 から車体までの高さを車高として検出し、車輪速検出手段Ｄが各車輪の車輪速を 検出する。Therefore, for example, if the system is moved to the fail-safe side as soon as possible, the drive wheel control will not be performed normally due to the difference in rotation speed with other tires, and as a result, on slippery roads and uneven terrain. There will be no problems such as deterioration of mobility and safety of the vehicle. (2) In the invention according to claim 2, the vehicle height detection means A detects the height from the center of rotation of each wheel to the vehicle body as the vehicle height, and the wheel speed detection means D detects the wheel speed of each wheel. To do.
【００１１】 そして、車両の発進直前に前記車高検出手段Ａにより検出された車高に基づき 得られる各車輪相互間の車高差が所定値以上で、かつ、車両の発進後に前記車輪 速検出手段Ｄにより検出された車輪速に基づき前記車高差がある車輪間に車輪速 差がある場合には、異径タイヤ判定手段Ｅにより異径タイヤが装着されたと判定 されるので、車輪速差のみによる判定に比べ異径タイヤ判定における判定時間を 短縮することができる。The vehicle height difference between the wheels obtained based on the vehicle height detected by the vehicle height detection means A immediately before the vehicle starts is equal to or more than a predetermined value, and the wheel speed detection is performed after the vehicle starts. If there is a wheel speed difference between the wheels having the vehicle height difference based on the wheel speed detected by the means D, the different diameter tire determination means E determines that a different diameter tire has been mounted, so the wheel speed difference is It is possible to shorten the determination time in the different diameter tire determination as compared to the determination based on only.
【００１２】[0012]
【実施例】 以下に本考案の一実施例を図面に基づいて説明する。 即ち、図３において、四輪車両１０の各車輪ＦＲ（前右）、ＦＬ（前左）、Ｒ Ｒ（後右）、ＲＬ（後左）には、夫々車高検出手段Ａとしての例えばポテンショ メータ等による車高センサ１１及び車輪速検出手段Ｄとしての車輪速センサ１２ が設けられて、各車輪毎の回転中心から車体までの車高及び車輪速を検出するこ とができるようになっている。Embodiment An embodiment of the present invention will be described below with reference to the drawings. That is, in FIG. 3, each wheel FR (front right), FL (front left), RR (rear right), and RL (rear left) of the four-wheel vehicle 10 has, for example, potentiometers as vehicle height detection means A. A vehicle height sensor 11 such as a meter and a wheel speed sensor 12 as a wheel speed detecting means D are provided so that the vehicle height and the wheel speed from the center of rotation of each wheel to the vehicle body can be detected. There is.
【００１３】 そして、車高センサ１１及び車輪速センサ１２の各検出信号は、コントロール ユニット１３に入力される。 また、コントロールユニット１３は、平均化手段Ｂ、異径タイヤ判定手段Ｃ、 Ｅの作用を奏する。 尚、図４に示すように、常用タイヤ１４の車高はＨ1 で、非常用のスペアタイ ヤ１５の車高はＨ2 で表され、コントロールユニット１３に入力された車高セン サ１１の検出信号は平均化処理されて、夫々ＨS1、ＨS2となり、その車高差はＨ S1 −ＨS2で示される。The respective detection signals of the vehicle height sensor 11 and the wheel speed sensor 12 are input to the control unit 13. The control unit 13 also has the functions of the averaging means B and the different-diameter tire determining means C, E. In addition, as shown in FIG. 4, the vehicle height of the service tire 14 is H.1And the vehicle height of the emergency spare tire 15 is H2, And the detection signals of the vehicle height sensor 11 input to the control unit 13 are averaged to obtain HS1, HS2And the vehicle height difference is H S1 -HS2Indicated by.
【００１４】 次に、図５に示すフローチャートにより、本考案の一実施例の作用を説明する 。 先ず、ステップ１（以下「Ｓ１」という。）では、車高センサ１１によって検 出される各車輪の回転中心から車体までの高さを車高としてその瞬時値を入力す る。Next, the operation of one embodiment of the present invention will be described with reference to the flowchart shown in FIG. First, in step 1 (hereinafter referred to as "S1"), the height from the center of rotation of each wheel detected by the vehicle height sensor 11 to the vehicle body is taken as the vehicle height, and the instantaneous value is input.
【００１５】 次に、Ｓ２では、前記Ｓ１で入力した車高の瞬時値と、前回までの平均化処理 した平均車高ＨS とを、大きな加重重みで加重平均して、瞬時値の変化を充分に 鈍らした平均車高ＨS を各車輪部毎に更新演算する。即ち、Ｓ２は、平均化手段 Ｂの作用を奏する。 また、Ｓ３では、Ｓ２で平均化処理された平均車高ＨS に基づき得られる各車 輪相互間の車高差が所定値ΔＬ以上であるか否かを判定する。そして、車高差が 所定値ΔＬ以上であれば、Ｓ４に進み、ΔＬ以下であれば、Ｓ５により異径タイ ヤは装着されていないと判定される。Next, in S2, the instantaneous value of the vehicle height input in S1 and the average vehicle height H S subjected to the averaging process up to the previous time are weighted and averaged with a large weighting, and the change in the instantaneous value is calculated. The sufficiently blunted average vehicle height H S is updated and calculated for each wheel unit. That is, S2 has the function of the averaging means B. Further, in S3, it is determined whether or not the vehicle height difference between the respective wheels obtained based on the average vehicle height H S averaged in S2 is equal to or more than a predetermined value ΔL. If the vehicle height difference is equal to or greater than the predetermined value ΔL, the process proceeds to S4, and if it is equal to or less than ΔL, it is determined in S5 that the different diameter tire is not mounted.
【００１６】 Ｓ４では、Ｓ３で求められた車高差が車両を所定時間走行させても収束するか 否かを判定する。そして、収束しなければ、Ｓ６に進み異径タイヤは装着されて いると判定され、収束すれば、縁石乗り上げ等による車高差であったと考えられ 、Ｓ５により異径タイヤは装着されていないと判定される。 即ち、Ｓ３〜Ｓ６は、異径タイヤ判定手段Ｃの作用を奏する。In S4, it is determined whether the vehicle height difference obtained in S3 converges even if the vehicle is run for a predetermined time. If it does not converge, the process proceeds to S6, where it is determined that the different-diameter tire is installed, and if it converges, it is considered that there is a vehicle height difference due to riding on a curb, etc., and the different-diameter tire is not installed in S5. To be judged. That is, S3 to S6 function as the different-diameter tire determining means C.
【００１７】 これにより、異径タイヤ判定における判定時間が短縮されると共に車高値を平 均化処理して車高差が求められるため、凹凸路面における走行時においても異径 タイヤの判定ができ、判定能力が向上する。 したがって、例えば、いち早くシステムをフェールセーフ側に移行させれば、 他のタイヤとの回転速度差のために、駆動輪制御が正常に行なわれず、そのため に、滑りやすい路面や不整地での車両の機動性及び安全性を悪化させるといった 問題が生じることはない。As a result, the determination time in the different-diameter tire determination is shortened, and the vehicle height value is averaged to obtain the vehicle height difference. Therefore, the different-diameter tire can be determined even when the vehicle is running on an uneven road surface. Judgment ability is improved. Therefore, for example, if the system is moved to the fail-safe side as soon as possible, the drive wheel control will not be performed normally due to the difference in rotation speed with other tires. There will be no problems such as deterioration of mobility and safety.
【００１８】 次に、図６に示すフローチャートにより、他の実施例の作用を説明する。 先ず、Ｓ１では、車高センサ１１によって検出される各車輪の回転中心から車 体までの高さを車高としてその瞬時値を入力する。 次に、Ｓ２では、車輪速センサ１２によって検出される各車輪部での車輪速の 瞬時値を入力する。Next, the operation of another embodiment will be described with reference to the flowchart shown in FIG. First, in S1, the height from the center of rotation of each wheel detected by the vehicle height sensor 11 to the vehicle body is taken as the vehicle height, and the instantaneous value is input. Next, in S2, the instantaneous value of the wheel speed at each wheel portion detected by the wheel speed sensor 12 is input.
【００１９】 そして、Ｓ３では、Ｓ１で得られた車両の発進直前の車高に基づき各車輪相互 間の車高差を求め、該車高差が所定値ΔＬ以上であるか否かを判定する。そして 、所定値ΔＬ以上であれば、Ｓ４に進み、ΔＬ以下であれば、Ｓ５で異径タイヤ は装着されていないと判定される。 次に、Ｓ４では、車両の発進後にＳ３で車高差が所定値ΔＬ以上であると判断 された各車輪間に車輪速差があるか否かを判定する。そして、車輪速差があれば Ｓ６で異径タイヤが装着されていると判定され、車輪速差がなければ、Ｓ５で異 径タイヤは装着されていないと判定される。Then, in S3, a vehicle height difference between the respective wheels is obtained based on the vehicle height immediately before starting of the vehicle obtained in S1, and it is determined whether or not the vehicle height difference is a predetermined value ΔL or more. .. If it is equal to or greater than the predetermined value ΔL, the process proceeds to S4, and if it is equal to or less than ΔL, it is determined in S5 that the different diameter tire is not mounted. Next, in S4, it is determined whether or not there is a wheel speed difference between the wheels that are determined to have a vehicle height difference of not less than the predetermined value ΔL in S3 after the vehicle has started. If there is a wheel speed difference, it is determined in S6 that the different diameter tire is mounted, and if there is no wheel speed difference, it is determined in S5 that the different diameter tire is not mounted.
【００２０】 即ち、Ｓ３〜Ｓ６は、異径タイヤ判定手段Ｅの作用を奏する。 これにより、車輪速差のみによる判定に比べ異径タイヤ判定における判定時間 を短縮することができる。That is, S3 to S6 function as the different-diameter tire determining means E. As a result, it is possible to shorten the determination time in the different diameter tire determination as compared with the determination based on only the wheel speed difference.
【００２１】[0021]
以上説明したように、請求項１に記載の考案によれば、車両走行時に車高検出 手段により周期的に検出された各車輪に対する車高の検出値を平均化手段により 平均化処理した各車輪相互間の車高差が所定値以上で、かつ、該平均化処理され た車高差が車両を所定時間走行させても収束しない場合には、車両に異径タイヤ が装着されていると判定される異径タイヤ判定手段を備えたので、異径タイヤが 装着されていると判断されるまでの検出速度を迅速ならしめることができると共 に車高値を平均化処理して車高差が求められるため、凹凸路面における走行時に おいても異径タイヤの判定ができ、判定能力が向上する。 As described above, according to the invention as set forth in claim 1, each wheel obtained by averaging the vehicle height detection values for each wheel periodically detected by the vehicle height detection means during traveling of the vehicle by the averaging means. If the vehicle height difference between them is equal to or greater than a predetermined value and the averaged vehicle height difference does not converge even after the vehicle has been running for a predetermined time, it is determined that the vehicle has different diameter tires. Since the different-diameter tire determination means is provided, it is possible to speed up the detection speed until it is determined that the different-diameter tire is installed, and at the same time, the vehicle height value is averaged to determine the vehicle height difference. Since it is required, it is possible to determine a tire having a different diameter even when the vehicle is running on an uneven road surface, and the determination ability is improved.
【００２２】 したがって、例えば、いち早くシステムをフェールセーフ側に移行させれば、 他のタイヤとの回転速度差のために、駆動輪制御が正常に行なわれず、滑りやす い路面や不整地での車両の機動性及び安全性を悪化させるといった問題が生じる ことはない。 また、請求項２に記載の考案によれば、車両の発進直前に車高検出手段により 検出された車高に基づき得られる各車輪相互間の車高差が所定値以上で、かつ、 車両の発進後に車輪速検出手段により検出された車輪速に基づき前記車高差があ る車輪間に車輪速差がある場合には、異径タイヤが装着されたと判定される異径 タイヤ判定手段を備えたので、車輪速差のみによる判定に比べ異径タイヤが装着 されていると判断されるまでの検出速度を迅速ならしめることができる。Therefore, for example, if the system is quickly switched to the fail-safe side, the drive wheels will not be controlled normally due to the difference in rotation speed from other tires, and the vehicle will be slippery or on uneven terrain. There will be no problems such as deterioration of maneuverability and safety. According to the second aspect of the invention, the vehicle height difference between the wheels obtained based on the vehicle height detected by the vehicle height detection means immediately before the vehicle starts is equal to or more than a predetermined value, and If there is a wheel speed difference between the wheels that have the vehicle height difference based on the wheel speed detected by the wheel speed detection means after starting, it is provided with a different diameter tire determination means for determining that a different diameter tire is mounted. Therefore, compared to the determination based on the wheel speed difference alone, the detection speed until it is determined that the tires with different diameters are mounted can be speeded up.
【図１】 本考案の一実施例の基本構成を示すブロック
図。FIG. 1 is a block diagram showing the basic configuration of an embodiment of the present invention.
【図２】 本考案の他の実施例の基本構成を示すブロッ
ク図。FIG. 2 is a block diagram showing the basic configuration of another embodiment of the present invention.
【図３】 本考案の一実施例を示すシステム概略図。FIG. 3 is a schematic view of a system showing an embodiment of the present invention.
【図４】 図３の一部省略正面図。FIG. 4 is a partially omitted front view of FIG.
【図５】 本考案の一実施例の作用を示すフローチャー
ト。FIG. 5 is a flowchart showing the operation of an embodiment of the present invention.
【図６】 本考案の他の実施例の作用を示すフローチャ
ート。FIG. 6 is a flowchart showing the operation of another embodiment of the present invention.
１０ 車両 １１ 車高センサー １２ 車輪速センサー １３ コントロールユニット １４ 常用タイヤ １５ 非常用スペアタイヤ 10 vehicle 11 vehicle height sensor 12 wheel speed sensor 13 control unit 14 service tire 15 emergency spare tire
Claims (2)
車高として検出する車高検出手段と、 車両走行時に前記車高検出手段により周期的に検出され
た各車輪に対する車高の検出値を平均化処理する平均化
手段と、 前記平均化手段により平均化処理された各車輪相互間の
車高差が所定値以上で、かつ、該平均化処理された車高
差が車両を所定時間走行させても収束しない場合に、車
両に異径タイヤが装着されていると判定する異径タイヤ
判定手段と、 を備えたことを特徴とする車両の異径タイヤ判定装置。1. Vehicle height detection means for detecting the height from the center of rotation of each wheel to the vehicle body as vehicle height; and vehicle height detection for each wheel periodically detected by the vehicle height detection means when the vehicle is traveling. Averaging means for averaging the values, and a vehicle height difference between the wheels averaged by the averaging means is a predetermined value or more, and the averaging vehicle height difference is predetermined for the vehicle. A different-diameter tire determination device for a vehicle, comprising: a different-diameter tire determination means for determining that the vehicle has a different-diameter tire when the vehicle does not converge even after traveling for a long time.
車高として検出する車高検出手段と、 各車輪の車輪速を検出する車輪速検出手段と、 車両の発進直前に前記車高検出手段により検出された車
高に基づき得られる各車輪相互間の車高差が所定値以上
で、かつ、車両の発進後に前記車輪速検出手段により検
出された車輪速に基づき前記車高差がある車輪間に車輪
速差がある場合には、車両に異径タイヤが装着されてい
ると判定する異径タイヤ判定手段と、 を備えたことを特徴とする車両の異径タイヤ判定装置。2. A vehicle height detecting means for detecting a height from a rotation center of each wheel to a vehicle body as a vehicle height, a wheel speed detecting means for detecting a wheel speed of each wheel, and the vehicle height immediately before starting the vehicle. The vehicle height difference between the wheels obtained based on the vehicle height detected by the detection means is a predetermined value or more, and the vehicle height difference based on the wheel speed detected by the wheel speed detection means after the vehicle starts. A different diameter tire determination device for a vehicle, comprising: a different diameter tire determination means for determining that a different diameter tire is mounted on the vehicle when there is a wheel speed difference between certain wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2070792U JPH0581626U (en) | 1992-04-06 | 1992-04-06 | Vehicle different diameter tire determination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2070792U JPH0581626U (en) | 1992-04-06 | 1992-04-06 | Vehicle different diameter tire determination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0581626U true JPH0581626U (en) | 1993-11-05 |
Family
ID=12034622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2070792U Pending JPH0581626U (en) | 1992-04-06 | 1992-04-06 | Vehicle different diameter tire determination device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0581626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007137303A (en) * | 2005-11-21 | 2007-06-07 | Toyota Motor Corp | Wheel abnormality detection device based on time-series parameter change |
-
1992
- 1992-04-06 JP JP2070792U patent/JPH0581626U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007137303A (en) * | 2005-11-21 | 2007-06-07 | Toyota Motor Corp | Wheel abnormality detection device based on time-series parameter change |
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