JPH0341073Y2 - - Google Patents
Info
- Publication number
- JPH0341073Y2 JPH0341073Y2 JP20241886U JP20241886U JPH0341073Y2 JP H0341073 Y2 JPH0341073 Y2 JP H0341073Y2 JP 20241886 U JP20241886 U JP 20241886U JP 20241886 U JP20241886 U JP 20241886U JP H0341073 Y2 JPH0341073 Y2 JP H0341073Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- outside air
- detection signal
- cooling water
- air temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 60
- 239000000498 cooling water Substances 0.000 claims description 39
- 230000005855 radiation Effects 0.000 claims description 16
- 239000002826 coolant Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Description
【考案の詳細な説明】
〔考案の目的〕
（産業上の利用分野）
本考案は、車輌の外気の温度を検出し、これを
車室内で表示する車輌用外気温表示装置に関す
る。[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to an outside temperature display device for a vehicle that detects the temperature of the outside air of a vehicle and displays it inside the vehicle.
（従来の技術）
一般に、この種の車輌用外気温表示装置におい
ては、特開昭61−215140号公報等に開示されてい
るように、外気温センサが直射日光、外気流等の
影響を直接受けにくいボンネツトの裏位置に設け
られ、その配設位置における外気の温度を検出す
るようになつている。しかし、ボンネツトの裏位
置は、車輌に搭載したエンジンの放熱の影響を受
けやすく、外気温センサが実際の外気の温度を正
確に検出できないことがあり、外気の温度が誤表
示されるという不具合があつた。(Prior Art) In general, in this type of outside temperature display device for a vehicle, an outside temperature sensor directly detects the effects of direct sunlight, outside airflow, etc., as disclosed in Japanese Patent Application Laid-Open No. 61-215140. It is installed at the back of the hood, where it is difficult to receive air, and detects the temperature of the outside air at that location. However, the position behind the hood is susceptible to the heat dissipation of the engine installed in the vehicle, and the outside temperature sensor may not be able to accurately detect the actual outside air temperature, resulting in a problem where the outside air temperature is displayed incorrectly. It was hot.
このため、前記従来例では、エンジンの冷却水
の温度を検出し冷却水温検出信号として出力する
冷却水温検出手段と、車輌の走行速度を検出し走
行速度検出信号として出力する走行速度検出手段
と、前記冷却水温検出信号の値が前記エンジンの
暖機終了温度との関連により定めた所定温度値よ
り大きく前記走行速度検出信号の値が所定低速値
より小さいとき判別信号を出力する判別手段と、
前記判別信号に応答して、この信号発生直前にお
ける外気温センサによる外気温検出信号の値に応
じた表示出力信号の付与をそのまま保持する保持
手段を設けて、エンジンの放熱の影響を受けた表
示出力信号の更新を行わないようにしている。 For this reason, in the conventional example, the cooling water temperature detection means detects the temperature of the engine cooling water and outputs it as a cooling water temperature detection signal, and the traveling speed detection means detects the traveling speed of the vehicle and outputs it as a traveling speed detection signal. Discrimination means that outputs a discrimination signal when the value of the cooling water temperature detection signal is greater than a predetermined temperature value determined in relation to the warm-up end temperature of the engine, and the value of the traveling speed detection signal is smaller than a predetermined low speed value;
In response to the discrimination signal, a holding means is provided for maintaining the display output signal according to the value of the outside temperature detection signal by the outside temperature sensor immediately before the generation of this signal, so that the display affected by the heat radiation of the engine is maintained. The output signal is not updated.
（考案が解決しようとする問題点）
ところで、前記従来例は、走行中等のイグニツ
シヨンスイツチがオンで、保持手段等へ電源が供
給されている時に有効であつて、イグニツシヨン
スイツチがオフのエンジン停止中例えば駐車の時
には電源の供給が停止されるので保持手段の動作
は無効となり、再度イグニツシヨンスイツチをオ
ンした時にはその時点における外気温センサによ
り検出された外気温検出信号の値に応じた外気の
温度が表示される。しかし、駐車時等でもエンジ
ンの放熱によりボンネツト内の温度が上昇し、特
に短時間の駐車ではこの放熱によつて外気温セン
サが実際の外気の温度より高い温度を検出してし
まい、外気の温度が誤表示されることがある。こ
れを解決するために、イグニツシヨンスイツチの
オフ時間すなわちエンジンの停止時間を測定する
タイマ回路を備え、一定のオフ時間内でイグニツ
シヨンスイツチをオンした時には、外気温センサ
がエンジンの放熱の影響を受けていると判定し、
前回イグニツシヨンスイツチをオフした直前の外
気の温度と現時点での外気の温度とを比較して低
い方を表示するものも開発されている。しかし、
この場合、オフ時間を測定するタイマ回路が必要
となりコストアツプになると共に、例えば車輌の
各種機関を制御するために設けられているマイク
ロコンピユータのタイマ利用する場合には、エン
ジンの停止中もマイクロコンピユータに電源を供
給していなければならず、このため、バツテリの
消耗が大きいと言う問題点がある。(Problems to be Solved by the Invention) By the way, the above conventional example is effective when the ignition switch is on while driving and power is being supplied to the holding means, etc., and when the ignition switch is off. When the engine is stopped, for example when parking, the power supply is stopped, so the operation of the holding means is disabled, and when the ignition switch is turned on again, the value of the outside temperature detection signal detected by the outside temperature sensor at that time is used. The corresponding outside air temperature will be displayed. However, even when the car is parked, the temperature inside the bonnet rises due to heat radiation from the engine.Especially when the car is parked for a short period of time, this heat radiation causes the outside temperature sensor to detect a temperature higher than the actual outside air temperature. may be displayed incorrectly. To solve this problem, we equipped a timer circuit that measures the ignition switch off time, that is, the engine stop time, and when the ignition switch is turned on within a certain off time, the outside temperature sensor detects the determined to be affected,
A device has also been developed that compares the temperature of the outside air immediately before the last time the ignition switch was turned off with the current temperature of the outside air and displays the lower one. but,
In this case, a timer circuit is required to measure the off time, which increases the cost. For example, when using the timer of a microcomputer installed to control various engines of the vehicle, the microcomputer can be used even when the engine is stopped. Since power must be supplied, there is a problem in that battery consumption is large.
本考案は、前記問題点に基づいて成されたもの
であり、コストアツプやバツテリの消耗を招くこ
となく、イグニツシヨンスイツチをオンした時、
実際の外気の温度に近い適切な外気の温度を表示
できる車輌用外気温表示装置を提供することを目
的とするものである。 The present invention was developed based on the above-mentioned problems, and it is possible to avoid increasing costs and depleting battery power when the ignition switch is turned on.
It is an object of the present invention to provide an outside temperature display device for a vehicle that can display an appropriate outside air temperature close to the actual outside air temperature.
（問題点を解決するための手段）
本考案は、車輌に搭載したエンジンの放熱の影
響を受けやすい位置に配設され外気の温度を検出
し外気温検出信号として出力する外気温検出手段
と、前記エンジンの冷却水の温度を検出し冷却水
検出信号として出力する冷却水温検出手段と、前
記外気温検出信号および前記冷却水温検出信号に
基づき外気の温度および冷却水の温度を演算する
演算手段と、前記車輌の前回イグニツシヨンスイ
ツチをオフした直前の外気温検出信号に応じた外
気の温度を記憶する記憶手段と、前記イグニツシ
ヨンスイツチのオン時に前記外気温検出信号と冷
却水温検出信号との差に基づく温度差を予め設定
した温度と比較する比較手段と、前記温度差が前
記設定した温度より大きい時に前記記憶手段に記
憶された外気の温度を外気の温度として表示させ
る制御手段とを備えたものである。
(Means for Solving the Problems) The present invention includes an outside temperature detection means that is disposed at a position susceptible to the heat radiation of an engine mounted on a vehicle, and that detects the temperature of outside air and outputs it as an outside temperature detection signal; a cooling water temperature detection means for detecting the temperature of the engine cooling water and outputting it as a cooling water detection signal; and a calculation means for calculating the temperature of the outside air and the temperature of the cooling water based on the outside air temperature detection signal and the cooling water temperature detection signal. , storage means for storing the temperature of the outside air according to the outside air temperature detection signal immediately before the last time the ignition switch of the vehicle was turned off, and the outside air temperature detection signal and the cooling water temperature detection signal when the ignition switch was turned on. a comparison means for comparing a temperature difference based on the difference between the temperature and a preset temperature, and a control means for displaying the temperature of the outside air stored in the storage means as the temperature of the outside air when the temperature difference is larger than the set temperature. It is prepared.
（作用）
イグニツシヨンスイツチをオンすなわちエンジ
ンが作動した時、外気温検出信号と冷却水温検出
信号との差に基づく外気の温度と冷却水の温度と
の差が予め設定した温度より大きい場合、イグニ
ツシヨンスイツチのオフ時間すなわちエンジンの
停止時間が短時間で外気温センサがエンジンの放
熱の影響を受けていると判定し、現時点での外気
の温度を表示せず、前回イグニツシヨンスイツチ
をオフした直前の外気の温度を表示するため、実
際の外気の温度に近い外気の温度を表示すること
ができる。(Function) When the ignition switch is turned on, that is, the engine is started, if the difference between the outside air temperature and the cooling water temperature based on the difference between the outside air temperature detection signal and the cooling water temperature detection signal is greater than the preset temperature, If the ignition switch is turned off, that is, the engine stops for a short time, the outside temperature sensor determines that it is affected by the engine's heat radiation, and does not display the current outside air temperature. Since the temperature of the outside air immediately before the switch is turned off is displayed, the outside air temperature can be displayed close to the actual outside air temperature.
（実施例）
以下、図面に基づいて本考案の一実施例を詳述
する。１は車輌に搭載したエンジンの本体の後端
より前側にて直射日光、外気流等の影響を直接受
けにくいボンネツトの裏位置に設けられた外気温
センサであり、この配設位置における外気の温度
Taを検出してこれに対応するアナログ外気温検
出信号を出力し、このアナログ外気温検出信号は
Ａ／Ｄ変換器２によりデジタル外気温検出信号Ａ
に変換されて出力される。３は車輌に搭載したエ
ンジンの冷却水タンクに設けられた冷却水温セン
サであり、冷却水の温度Twを検出してこれに対
応するアナログ冷却水温検出信号を出力し、この
アナログ冷却水温検出信号はＡ／Ｄ変換器４によ
りデジタル冷却水温検出信号Ｂに変換されて出力
される。５は車載バツテリ、６はイグニツシヨン
スイツチであり、このイグニツシヨンスイツチ６
のオン・オフはスイツチ検出回路７によりデジタ
ルスイツチ信号Ｃに変換されて出力される。(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. Reference numeral 1 is an outside air temperature sensor installed behind the bonnet, which is in front of the rear end of the engine body mounted on the vehicle and is not directly affected by direct sunlight, outside air currents, etc., and measures the outside air temperature at this location.
Ta is detected and a corresponding analog outside temperature detection signal is output, and this analog outside temperature detection signal is converted into a digital outside temperature detection signal A by the A/D converter 2.
is converted and output. 3 is a coolant temperature sensor installed in the coolant tank of the engine mounted on the vehicle, which detects the coolant temperature Tw and outputs a corresponding analog coolant temperature detection signal. The A/D converter 4 converts it into a digital cooling water temperature detection signal B and outputs it. 5 is an in-vehicle battery, 6 is an ignition switch, and this ignition switch 6
The on/off signal is converted into a digital switch signal C by the switch detection circuit 7 and output.
８は前記デジタル外気温検出信号Ａ，冷却水温
検出信号Ｂ及びスイツチ信号Ｃを入力し、予め記
憶した表示制御プログラムに従つて、後述する表
示器にて適切な外気の温度を表示させるマイクロ
コンピユータである。このマイクロコンピユータ
８は第１図に示すように、入力された外気温検出
信号Ａおよび冷却水温検出信号Ｂに基づき外気の
温度Taおよび冷却水の温度Tw演算する演算手
段９と、イグニツシヨンスイツチ６がオフされ前
記スイツチ信号Ｃとしてオフ信号が演算手段９に
送られた直前の外気の温度Ta1を記憶する不揮発
性メモリ等による記憶手段１０と、外気温検出信
号Ａと冷却水温検出信号Ｂとを入力してイグニツ
シヨンスイツチ６がオンされ前記スイツチ信号Ｃ
としてオン信号が演算手段９に送られた時にこれ
ら外気温検出信号Ａと冷却水温検出信号Ｂとの差
（Ｂ−Ａ）に基づく外気の温度Taと冷却水の温度
Twとの差ΔT（＝Tw−Ta）を予め設定した温度
Tsと比較する比較手段１１と、この比較結果に
基づき、ΔT＞Tsの時は記憶手段１０に記憶され
たイグニツシヨンスイツチ６オフ直前の外気の温
度Ta1を、また、ΔT≦Tsの時はイグニツシヨン
スイツチ６オン後の外気温検出信号Ａに基づく外
気の温度Ta2をそれぞれ後述する表示器にて表示
するよう指令信号Ｄを出力する制御手段１２とか
ら構成される。ところで、車輌のエンジンは、車
輌の一定時間以上走行の後においては、外気温セ
ンサ１がエンジンの放熱による影響をほとんど受
けずに外気温センサ１で検出した外気の温度Ta
をそのまま表示しても実際の外気の温度Ttとほ
ぼ等しくなるまでの冷却時間に大差なく、前記温
度Tsは、各車種毎に実験的に得られる前記冷却
時間例えば１時間経過時の前記各車種毎の前記差
ΔT以下の温度である。そして、このマイクロコ
ンピユータ８により出力された指令信号Ｄに基づ
き駆動回路１３が車室内に設けられた表示器１４
で外気の温度Ta1もしくはTa2を表示する。尚、
これら駆動回路１３と表示器１４とで表示手段１
５、外気温センサ１とＡ／Ｄ変換器２とで外気温
検出手段１６、冷却水温センサ３とＡ／Ｄ変換器
４とで冷却水温検出手段１７が各々構成されてい
る。 8 is a microcomputer which inputs the digital outside temperature detection signal A, the cooling water temperature detection signal B, and the switch signal C, and displays an appropriate outside air temperature on a display to be described later according to a display control program stored in advance. be. As shown in FIG. 1, this microcomputer 8 includes a calculation means 9 that calculates the outside air temperature Ta and the cooling water temperature Tw based on the input outside air temperature detection signal A and cooling water temperature detection signal B, and an ignition switch. 6 is turned off and an off signal is sent to the calculation means 9 as the switch signal C. A storage means 10, such as a non-volatile memory, stores the outside air temperature Ta 1 just before the switch signal C is turned off, and the outside air temperature detection signal A and the cooling water temperature detection signal B are stored. The ignition switch 6 is turned on and the switch signal C is input.
When the ON signal is sent to the calculation means 9, the outside air temperature Ta and the cooling water temperature are calculated based on the difference (B-A) between the outside air temperature detection signal A and the cooling water temperature detection signal B.
Temperature at which the difference ΔT (= Tw − Ta) from Tw is set in advance
Based on the comparison result, when ΔT>Ts, the temperature Ta 1 of the outside air immediately before the ignition switch 6 is turned off stored in the storage means 10, and when ΔT≦Ts, the comparison means 11 compares it with Ts. is composed of a control means 12 which outputs a command signal D to display the outside air temperature Ta 2 based on the outside air temperature detection signal A after the ignition switch 6 is turned on on a display device to be described later. By the way, after the vehicle has been running for a certain period of time, the vehicle engine is almost unaffected by heat radiation from the engine, and the temperature Ta of the outside air detected by the outside temperature sensor 1 increases.
Even if the temperature Ts is displayed as is, there is no significant difference in the cooling time until it becomes almost equal to the actual outside air temperature Tt. The temperature is equal to or less than the above-mentioned difference ΔT. Based on the command signal D outputted by this microcomputer 8, a drive circuit 13 is connected to a display 14 provided in the vehicle interior.
Displays the outside air temperature Ta 1 or Ta 2 . still,
These drive circuits 13 and display 14 make up the display means 1.
5. The outside temperature sensor 1 and the A/D converter 2 constitute an outside temperature detection means 16, and the cooling water temperature sensor 3 and the A/D converter 4 constitute a cooling water temperature detection means 17, respectively.
以上のように構成される本考案装置の作用を説
明する。 The operation of the device of the present invention constructed as above will be explained.
多くの車輌には冷却水温センサ３が設けられて
おり、本考案はこれを利用している。そして、一
般的に、冷却水の温度Twは第３図に示すように
イグニツシヨンスイツチ６をオフしてエンジンが
停止すると徐々に低下して所定時間が経過すると
実際の外気の温度Ttとほぼ等しくなるものであ
る。一方、エンジン近傍に配設された外気温セン
サ１により検出される外気の温度Taは、走行中
には実際の外気の温度Ttとほぼ等しいが、イグ
ニツシヨンスイツチ６をオフしてエンジンが停止
すると、エンジンの放熱によりボンネツトの裏の
エンジンルームが温められるため、イグニツシヨ
ンスイツチ６をオフした時から徐々に上昇しその
後低下して実際の外気の温度Ttとほぼ等しくな
る。そこで、本考案は、冷却水温センサ３により
検出される冷却水の温度Twと外気温センサ１に
より検出される外気の温度Taとの差ΔT（＝Tw
−Ta）を予め設定した温度Tsより大きい時に
は、イグニツシヨンスイツチ６のオフ時間すなわ
ちエンジンの停止時間が短時間で外気温センサ１
がエンジンの放熱の影響を受けており、この時の
外気の温度Ta2は誤つた温度であるとして前回イ
グニツシヨンスイツチ６をオフした直前の外気の
温度Ta1を、差ΔTが前記温度Tsより小さい時に
は、イグニツシヨンスイツチ６のオフ時間すなわ
ちエンジンの停止時間が長時間で外気温センサ１
がエンジンの放熱のほとんど影響を受けず実際の
外気の温度Ttを正確に検出できるとしてこの時
の外気の温度Ta2をそれぞれ実際の外気の温度Tt
として表示器１４が表示するようマイクロコンピ
ユータ８は指令信号Ｄを出力するようにしてい
る。 Many vehicles are equipped with a cooling water temperature sensor 3, and the present invention utilizes this sensor. Generally, as shown in Figure 3, when the ignition switch 6 is turned off and the engine is stopped, the coolant temperature Tw gradually decreases, and after a predetermined period of time has passed, it almost reaches the actual outside air temperature Tt. They are equal. On the other hand, the outside air temperature Ta detected by the outside air temperature sensor 1 installed near the engine is almost equal to the actual outside air temperature Tt while driving, but when the ignition switch 6 is turned off and the engine is stopped. Then, the heat dissipated from the engine warms the engine compartment behind the hood, so the temperature gradually rises from the time the ignition switch 6 is turned off and then decreases until it becomes almost equal to the actual outside air temperature Tt. Therefore, in the present invention, the difference ΔT (= Tw
-Ta) is higher than the preset temperature Ts, the off time of the ignition switch 6, that is, the engine stop time is short, and the outside temperature sensor 1
is affected by heat dissipation from the engine, and the outside air temperature Ta 2 at this time is an incorrect temperature, so the outside air temperature Ta 1 immediately before the ignition switch 6 was turned off last time is changed to the outside air temperature Ta 1 , and the difference ΔT is the temperature Ts. When the temperature is smaller than the ignition switch 6, the off time of the ignition switch 6, that is, the time when the engine is stopped, is so long that the outside temperature sensor 1
Assuming that the actual outside air temperature Tt can be detected accurately without being affected by the heat radiation of the engine, the outside air temperature Ta 2 at this time is the actual outside air temperature Tt.
The microcomputer 8 outputs the command signal D so that the display 14 displays the command signal D.
第２図を例にして上記動作を説明すると、マイ
クロコンピユータ８は外気温検出信号Ａ、冷却水
温検出信号Ｂ及びスイツチ信号Ｃを入力してお
り、イグニツシヨンスイツチ６がオンの走行中に
は、演算手段９はこの外気温検出信号Ａに基づい
て外気の温度Taを求め、このTaは実際の外気の
温度Ttとして表示器１４により表示される。イ
グニツシヨンスイツチ６がオフのエンジンの停止
中には、イグニツシヨンスイツチ６がオフされる
直前の外気の温度Ta1が記憶手段１０に記憶され
る。その後、イグニツシヨンスイツチ６がオンさ
れてオン信号が入力されると、比較手段１１は、
外気温検出信号Ａと冷却水温検出信号Ｂとの温度
差（Ｂ−Ａ）に基づく外気の温度Taと冷却水の
温度Twの差ΔT（＝Tw−Ta）を予め設定した温
度Tsと比較し、制御手段１２は、ΔT≦Tsであ
れば、イグニツシヨンスイツチ６のオフ時間すな
わちエンジンの停止時間が長時間で外気温センサ
１がエンジンの放熱の影響をほとんど受けておら
ず、外気温センサ１により検出される現時点の外
気の温度Ta2が実際の外気の温度Ttとほぼ等しい
と判定してその外気の温度Ta2を表示させる。一
方、ΔT＞Tsであれば、イグニツシヨンスイツチ
６のオフ時間すなわちエンジンの停止時間が短時
間で外気温センサ１がエンジンの放熱の影響を受
けているとして、制御手段１２は前回イグニツシ
ヨンスイツチ６をオフした直前に記憶された外気
の温度Ta1を実際の外気の温度Ttとして表示させ
る。尚、この外気の温度Ta1の表示は、イグニツ
シヨンスイツチ６がオンされて所定時間経過後も
しくはΔT≦Tsになつた時点で外気温センサ１に
より検出される外気の温度Taへ切り換わつたり、
あるいは、イグニツシヨンスイツチ６がオンされ
た後から一定の割合例えば１℃／分で外気の温度
Ta1をイグニツシヨンスイツチ６がオンされた後
の外気温センサ１により検出される外気の温度
Taへ段階的に切り換えるようになつている。 To explain the above operation using FIG. 2 as an example, the microcomputer 8 inputs an outside temperature detection signal A, a cooling water temperature detection signal B, and a switch signal C. , the calculation means 9 determines the outside air temperature Ta based on this outside air temperature detection signal A, and this Ta is displayed on the display 14 as the actual outside air temperature Tt. While the engine is stopped with the ignition switch 6 turned off, the temperature Ta 1 of the outside air immediately before the ignition switch 6 is turned off is stored in the storage means 10. Thereafter, when the ignition switch 6 is turned on and an on signal is input, the comparison means 11
The difference ΔT (= Tw − Ta) between the outside air temperature Ta and the cooling water temperature Tw based on the temperature difference (B − A) between the outside air temperature detection signal A and the cooling water temperature detection signal B is compared with the preset temperature Ts. , the control means 12 determines that if ΔT≦Ts, the off time of the ignition switch 6, that is, the engine stop time is long and the outside temperature sensor 1 is hardly affected by the heat radiation of the engine, and the outside temperature sensor 1 It is determined that the current outside air temperature Ta 2 detected by step 1 is approximately equal to the actual outside air temperature Tt, and the outside air temperature Ta 2 is displayed. On the other hand, if ΔT>Ts, it is assumed that the off time of the ignition switch 6, that is, the engine stop time is short and the outside temperature sensor 1 is affected by heat radiation from the engine, and the control means 12 The outside air temperature Ta 1 stored immediately before the switch 6 was turned off is displayed as the actual outside air temperature Tt. The display of the outside air temperature Ta 1 is switched to the outside air temperature Ta detected by the outside air temperature sensor 1 after a predetermined time has elapsed since the ignition switch 6 was turned on, or when ΔT≦Ts. Tsutari,
Alternatively, after the ignition switch 6 is turned on, the temperature of the outside air is changed at a constant rate, for example, 1°C/min.
Ta 1 is the temperature of the outside air detected by the outside air temperature sensor 1 after the ignition switch 6 is turned on.
The switch to Ta is being made in stages.
このようにして、イグニツシヨンスイツチ６を
オンした時、外気温センサ１がエンジンの放熱の
影響を受けていれば、前回イグニツシヨンスイツ
チ６をオフした直前の外気の温度Ta1を外気の温
度として表示するため、実際の外気の温度Ttと
ほぼ等しい適切な温度が表示器１４で表示され、
運転者等は車室内にて実際の外気の温度Ttを知
ることができる。すなわち、ΔT＞Tsの時には、
イグニツシヨンスイツチ６のオフ時間すなわちエ
ンジンの停止時間が短時間であるということであ
つて、車輌の周囲の状況である外気の温度Ttが
イグニツシヨンスイツチ６をオフする直前と大き
く変わらないことが多く、一方、エンジンの放熱
による影響によつて外気温センサ１の信頼性に不
安があることから、この時には、イグニツシヨン
スイツチ６をオンにした時の外気の温度Ta2より
も前回イグニツシヨンスイツチ６をオフした直前
の外気の温度Ta1の方が実際の外気の温度Ttに近
い。逆に、ΔT≦Tsの時には、イグニツシヨンス
イツチ６のオン時間すなわちエンジンの停止時間
が長時間であるということであつて、外気温セン
サ１がエンジンの放熱による影響をほとんど受け
ず、この時には、新たにイグニツシヨンスイツチ
６をオンにした時の外気の温度Ta2が実際の外気
の温度Ttに近い。したがつて、差ΔTを検出する
ことにより、イグニツシヨンスイツチ６のオフ時
間すなわちエンジンの停止時間を測定することが
できると共に外気の温度Ta1もしくはTa2のどち
らかを自動的に選択して表示器１４にて表示させ
ることにより、実際の外気の温度Ttに近い適切
な温度を得ることができるものである。 In this way, when the ignition switch 6 is turned on, if the outside air temperature sensor 1 is affected by the heat radiation of the engine, the outside air temperature Ta 1 immediately before the ignition switch 6 was turned off last time is calculated as the outside air temperature Ta 1 . In order to display the temperature, an appropriate temperature approximately equal to the actual outside air temperature Tt is displayed on the display 14,
The driver etc. can know the actual outside air temperature Tt from inside the vehicle. That is, when ΔT>Ts,
The off time of the ignition switch 6, that is, the time when the engine is stopped, is short, and the outside air temperature Tt, which is the situation around the vehicle, does not change significantly from immediately before the ignition switch 6 is turned off. On the other hand, there are concerns about the reliability of the outside air temperature sensor 1 due to the influence of heat radiation from the engine. The outside air temperature Ta 1 immediately before the switch 6 is turned off is closer to the actual outside air temperature Tt. Conversely, when ΔT≦Ts, it means that the ignition switch 6 is on for a long time, that is, the engine is stopped for a long time, and the outside temperature sensor 1 is hardly affected by the engine's heat radiation. , the outside air temperature Ta 2 when the ignition switch 6 is newly turned on is close to the actual outside air temperature Tt. Therefore, by detecting the difference ΔT, it is possible to measure the off time of the ignition switch 6, that is, the engine stop time, and to automatically select either the outside air temperature Ta 1 or Ta 2 . By displaying the temperature on the display 14, an appropriate temperature close to the actual outside air temperature Tt can be obtained.
また、外気温センサ１がエンジンの放熱の影響
を受けているか否かの判定は通常の車輌に設けら
れている冷却水温センサ３を用いて行うため、コ
ストアツプを招くことはない。 Further, since the judgment as to whether or not the outside air temperature sensor 1 is affected by the heat radiation of the engine is made using the cooling water temperature sensor 3 provided in a normal vehicle, no increase in cost is caused.
更に、エンジンの放熱の影響を外気温センサ１
が受けるか否かの判定すなわちエンジンのオフ時
間を測定するためのタイマ回路を必要としないた
め、コストアツプを招くことなく、しかもバツテ
リの消耗といつた問題も有しないものである。 Furthermore, the influence of heat radiation from the engine can be measured using the outside temperature sensor 1.
Since there is no need for a timer circuit to determine whether or not the engine is affected, that is, to measure the engine off time, there is no increase in costs and there are no problems such as battery consumption.
以上本考案の一実施例を詳述したが、本考案の
要旨の範囲内で適宜変形可能である。 Although one embodiment of the present invention has been described in detail above, it can be modified as appropriate within the scope of the gist of the present invention.
以上詳述したように本考案によれば車輌に搭載
したエンジンの放熱の影響を受けやすい位置に配
設され外気の温度を検出し外気温検出信号として
出力する外気温検出手段と、前記エンジンの冷却
水の温度を検出し冷却水温検出信号として出力す
る冷却水温検出手段と、前記外気温検出信号およ
び前記冷却水温検出信号に基づき外気の温度およ
び冷却水の温度を演算する演算手段と、前記車輌
の前回イグニツシヨンスイツチをオフした直前の
外気温検出信号に応じた外気の温度を記憶する記
憶手段と、前記イグニツシヨンスイツチのオン時
に前記外気温検出信号と冷却水温検出信号との差
に基づく温度差を予め設定した温度と比較する比
較手段と、前記温度差が前記設定した温度より大
きい時に前記記憶手段に記憶された外気の温度を
外気の温度として表示させる制御手段とを備えた
ことにより、コストアツプやバツテリの消耗を招
くことなく、イグニツシヨンスイツチをオンした
時、実際の外気の温度に近い適切な外気の温度を
表示できる車輌用外気温表示装置を提供できる。
As detailed above, according to the present invention, there is provided an outside temperature detection means which is arranged at a position susceptible to the heat radiation of an engine mounted on a vehicle and which detects the temperature of outside air and outputs it as an outside temperature detection signal; a cooling water temperature detection means for detecting the temperature of the cooling water and outputting it as a cooling water temperature detection signal; a calculation means for calculating the temperature of the outside air and the temperature of the cooling water based on the outside air temperature detection signal and the cooling water temperature detection signal; storage means for storing the outside air temperature according to the outside air temperature detection signal immediately before the last time the ignition switch was turned off; and a control means for displaying the outside air temperature stored in the storage means as the outside air temperature when the temperature difference is greater than the set temperature. Therefore, it is possible to provide an outside temperature display device for a vehicle that can display an appropriate outside air temperature close to the actual outside air temperature when an ignition switch is turned on, without increasing costs or battery consumption.
第１図は本考案の一実施例を示すブロツク図、
第２図は動作を示すフローチヤート、第３図は外
気温センサと冷却水温センサの温度特性図であ
る。
６……イグニツシヨンスイツチ、９……演算手
段、１０……記憶手段、１１……比較手段、１２
……制御手段、１６……外気温検出手段、１７…
…冷却水温検出手段。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a flowchart showing the operation, and FIG. 3 is a temperature characteristic diagram of the outside air temperature sensor and the cooling water temperature sensor. 6...Ignition switch, 9...Calculating means, 10...Storage means, 11...Comparing means, 12
...control means, 16...outside temperature detection means, 17...
...Cooling water temperature detection means.
Claims (1)
すい位置に配設され外気の温度を検出し外気温検
出信号として出力する外気温検出手段と、前記エ
ンジンの冷却水の温度を検出し冷却水温検出信号
として出力する冷却水温検出手段と、前記外気温
検出信号および前記冷却水温検出信号に基づき外
気の温度および冷却水の温度を演算する演算手段
と、前記車輌の前回イグニツシヨンスイツチをオ
フした直前の外気温検出信号に応じた外気の温度
を記憶する記憶手段と、前記イグニツシヨンスイ
ツチのオン時に前記外気温検出信号と冷却水温検
出信号との差に基づく温度差を予め設定した温度
と比較する比較手段と、前記温度差が前記設定し
た温度より大きい時に前記記憶手段に記憶された
外気の温度を外気の温度として表示させる制御手
段とを備えたことを特徴とする車輌用外気温表示
装置。 an outside air temperature detection means that is disposed at a position susceptible to the heat radiation of an engine mounted on a vehicle and that detects the temperature of outside air and outputs an outside air temperature detection signal; and an outside air temperature detection means that detects the temperature of a cooling water of the engine and outputs a cooling water temperature detection signal. cooling water temperature detection means for outputting the temperature of the outside air and the temperature of the cooling water based on the outside temperature detection signal and the cooling water temperature detection signal; a storage means for storing the temperature of the outside air according to the outside air temperature detection signal, and a temperature difference based on the difference between the outside air temperature detection signal and the cooling water temperature detection signal when the ignition switch is turned on, which is compared with a preset temperature. An outside temperature display device for a vehicle, comprising a comparison means and a control means for displaying the outside air temperature stored in the storage means as the outside air temperature when the temperature difference is larger than the set temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20241886U JPH0341073Y2 (en) | 1986-12-25 | 1986-12-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20241886U JPH0341073Y2 (en) | 1986-12-25 | 1986-12-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63104647U JPS63104647U (en) | 1988-07-06 |
| JPH0341073Y2 true JPH0341073Y2 (en) | 1991-08-29 |
Family
ID=31166781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20241886U Expired JPH0341073Y2 (en) | 1986-12-25 | 1986-12-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0341073Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014005894A (en) * | 2012-06-26 | 2014-01-16 | Suzuki Motor Corp | Shift control device of automatic transmission |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6302657B2 (en) * | 2013-12-13 | 2018-03-28 | ボルボトラックコーポレーション | Vehicle control device |
-
1986
- 1986-12-25 JP JP20241886U patent/JPH0341073Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014005894A (en) * | 2012-06-26 | 2014-01-16 | Suzuki Motor Corp | Shift control device of automatic transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63104647U (en) | 1988-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7619859B2 (en) | Electric power steering device | |
| JPH0565092B2 (en) | ||
| GB2414569A (en) | A vehicle battery heater control method and system | |
| JPH0341073Y2 (en) | ||
| JP2001277903A (en) | Temperature display device for vehicle | |
| JP2002063946A (en) | Dew condensation prevention device of battery system for electric automobile | |
| JPH10169433A (en) | Preheating control device for catalyst | |
| JP3116351B2 (en) | Outside temperature detection display for automobile | |
| JPS62155111A (en) | Airconditioning control device for car | |
| JPS61215140A (en) | Outside temperature display unit for vehicles | |
| JP2007327748A (en) | Apparatus for determining anomaly of steering angle sensor | |
| JPS63298078A (en) | Diagnosing and warning device for on-vehicle battery | |
| JPS6021285Y2 (en) | Automotive air conditioning control device | |
| KR102044822B1 (en) | Apparatus for controlling boot path using digital cluster and method for controlling thereof | |
| JP3965940B2 (en) | Vehicle perimeter warning device | |
| JPS63526Y2 (en) | ||
| JPH0645297B2 (en) | Outside air temperature display method for automobiles | |
| JP2756709B2 (en) | Method for determining steering state of all-electric power steering device | |
| JP3661294B2 (en) | Air conditioner for vehicles | |
| JPH0525342Y2 (en) | ||
| JPS63212120A (en) | Outside air temperature display method for automobile | |
| JPS63182534A (en) | Outside air temperature detector for automobile | |
| JP2705229B2 (en) | Vehicle air conditioner | |
| JPH0740216U (en) | Vehicle air conditioning controller | |
| KR19980076437A (en) | Outside temperature display of car |