JP2017210171A - 車両制御装置 - Google Patents
車両制御装置 Download PDFInfo
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- JP2017210171A JP2017210171A JP2016105758A JP2016105758A JP2017210171A JP 2017210171 A JP2017210171 A JP 2017210171A JP 2016105758 A JP2016105758 A JP 2016105758A JP 2016105758 A JP2016105758 A JP 2016105758A JP 2017210171 A JP2017210171 A JP 2017210171A
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Abstract
【解決手段】本発明は、道路情報又は外界情報に基づいて決定される第1の走行抵抗を取得する第1の走行抵抗取得部と、車両が実際に走行した結果に基づいて決定される第2の走行抵抗を取得する第2の走行抵抗取得部と、車両が実際に走行した所定の区間に対する前記第1の走行抵抗と前記第2の走行抵抗との比較結果に基づいて、前記前方道路を走行する際の惰性走行制御内容を決定する。
【選択図】図1
Description
図1は本発明の実施形態に係る車両制御装置を実現するための制御ブロック図の一例である。道路の交差やカーブ,勾配,制限車速などの情報を地図またはカメラ等の外界センサから取得する外界情報取得部102と,この情報を基に前方の走行抵抗の予測結果である第1の走行抵抗を算出する第1の走行抵抗予測部108と,自車の車速やクラッチおよび変速機の状態等の情報を取得する自車情報取得部103と,自車情報取得部103の情報を基に自車が実際に受けている走行抵抗を推定する第2の走行抵抗推定部109を備え,この第1の走行抵抗の値と第2の走行抵抗の値に基づいて惰性走行制御の内容を決定する惰性走行制御内容決定部112を有する。この構成により,未だ自車が走行していない道路の走行抵抗を,現在の走行環境(自車状況,路面状況等)に即して予測することができる。
走行予定経路における目標車速を利用し,惰性走行開始,終了位置を決定する方法を述べる。
実施形態1において,第1の走行抵抗と第2の走行抵抗とから第3の走行抵抗を算出し,これを制御に用いる方法を説明する。
Δaplus = Δanow × α + Δaplus ×(1 - α) ・・・(式1)
また,時間的な重みを付けるだけでなく,惰性走行中,特にクラッチ開放中に取得した値の場合,さらに大きな重みを付けて上乗せする値を計算する。すなわち,
Δaplus = Δanow × α× β+ Δaplus ×(1 - α) ・・・(式2)
ただしβはクラッチ状態により変化する係数で,クラッチ開放中のほうがクラッチ締結中より大きな値となるよう設定する。
図12を用い,第1の惰性走行計画と第2の惰性走行計画の違いに応じて第3の惰性走行計画を立案し,惰性走行計画の差分により,燃費が効果的に向上できない状況が発生することを防ぐ方法を説明する。
ドライバが加減速を能動的に制御している,具体的にはACC等の自動加減速機能を使わず,アクセルペダルまたはブレーキペダルを使って車速を制御している場合,惰性走行制御計画において惰性走行を開始することが推奨される場合,その旨をHMI経由でドライバに通知する。通知方法はナビ等のセンター画面に出しても良いし,インストルメントパネルに表示しても良いし,または音声で提示したり,AI画面上に表示したり,あるいはペダル反力を高めるなどする方法でも良い。
第3の走行抵抗のさらに別の算出方法と,その結果に合わせた惰性走行の制御方法を説明する。走行抵抗を変動させる因子は,主に空気抵抗,転がり抵抗,勾配抵抗,加速抵抗である。このうち,加速抵抗は車両の特性からおおよそ見積もることが出来るが,その他の因子については環境や車両重量等で変動する。変動の仕方は各因子に応じそれぞれ異なるので,図14に示すフローチャートにより,各因子を見積もり、図15に示す方法で、各因子の見積もり結果を記憶する。
Wt = Wt × β + Wt ×(1 -β) ただしβ<<1
S44では,ΔFの単位時間当たりの変化量が所定値以内であるかを判断する。所定値以内の場合,S46に進む。変化量が所定値以上,すなわちΔFが急変したときは,S45に進み,勾配抵抗の値を修正する。なお,このS44において単位時間は車速に応じ可変とし,車速が高いほど短い時間とする。
実施形態6の走行抵抗算出の例外処理について説明する。まず車両重量の修正について,停車後の発進時やイグニON時には,荷物や乗車人数の変動が発生している可能性があるため,前回値を記憶しておき,前回値と著しく異なる,つまり加速中と減速中の差分の差異が再発生した場合には,前回値に小さな重みをつけ,今回値以降に相対的に大きな重みを付ける。これにより,車両重量の変動にすばやく対応する。
第2の走行抵抗を得るにあたって,C2X通信を用いて他車両の走行実績を取得する方法を説明する。各車両は,推定した走行抵抗そのものか,通信網に余裕があれば走行方向,車速,タイヤスリップ有無,センサ精度,その車両の走行抵抗推定精度の指標となりうる走行抵抗修正頻度などの情報を周囲の車両に送信するか,または路側通信機器等を用いてクラウド上に格納する。自車のECUもしくはクラウドを管理するコンピュータがこの情報を基に走行抵抗推定値の平均を算出する。この値を第2の走行抵抗として,第1の走行抵抗の修正に用いる。なお,第2の走行抵抗算出時に,単純な平均でなく,自車や自車両に近い車両の情報や,センサ精度または推定精度の高い車両の推定した走行抵抗に大きな重みをつける加重平均を採用してもよい。
本実施形態は惰性走行に限定していたが,本走行抵抗修正結果をエンジン駆動力算出や緊急ブレーキ時の制動力算出等に用いても良い。
302 自動変速機
303 駆動輪
304 エンジン
305 トルクコンバータ
306 クラッチ
Claims (10)
- 道路情報又は外界情報に基づいて決定される第1の走行抵抗を取得する第1の走行抵抗取得部と、
車両が実際に走行した結果に基づいて決定される第2の走行抵抗を取得する第2の走行抵抗取得部と、
車両が実際に走行した所定の区間に対する前記第1の走行抵抗と前記第2の走行抵抗との比較結果に基づいて、前記前方道路を走行する際の惰性走行制御内容を決定する、
走行制御装置。 - 前記惰性走行制御内容は,少なくとも燃料噴射の停止,クラッチの切断,締結,変速比のいずれかひとつを含む,請求項1に記載の車両制御装置。
- 前記惰性走行制御内容の計画に当たって,減速対象地物,上下限制限速度,先行車速,車間距離の少なくともいずれかひとつの情報を用いることを特徴とする,請求項1または2に記載の車両制御装置。
- 前記惰性走行制御部は,前記第1の走行抵抗より前記第2の走行抵抗が小さい場合,第1の走行抵抗から算出される惰性走行開始タイミングよりも惰性走行開始タイミングを早くし,前記第1の走行抵抗より前記第2の走行抵抗が大きいと前記惰性走行開始タイミングを遅くすることを特徴とする,請求項1または2に記載の車両制御装置。
- 前記惰性走行制御内容は,第1の走行抵抗から作成した第1の惰性走行計画と,第2の走行抵抗から作成した第2の惰性走行計画をもとに第3の惰性走行計画を作成し,この計画に基づいて前記車両を制御する,請求項1または2に記載の車両制御装置。
- 前記第2の走行抵抗取得において,他車の算出した走行抵抗を利用することを特徴とする,請求項1から3のいずれか一項に記載の車両制御装置。
- 第1の走行抵抗と比較する第2の走行抵抗は,ある所定時間内の第2の走行抵抗の時系列において,時間的に近く,かつ惰性走行中であるほど大きな重みをつけて計算されることを特徴とする,請求項1から3のいずれか一項に記載の車両制御装置。
- 前記車両がハイブリッド車であるときは,惰性走行中,モータのみで走行しているとき,エンジンを駆動しているとき,の順で第2の走行抵抗算出時の重みをつけることを特徴とする,請求項1から4のいずれか一項に記載の車両制御装置。
- 前記車両がハイブリッド車であり,かつ所定時間または距離以上惰性走行を実施していないときは,第1または第3の走行計画に基づいて惰性走行を行なう前に,モータのみで駆動した走行を行なうことを特徴とする,請求項1から5のいずれか一項に記載の車両制御装置。
- 走行抵抗の補正が頻繁に行われる場所では,惰性走行時にエンジンをアイドル回転で維持することを特徴とする,請求項1から6のいずれか一項に記載の車両制御装置。
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EP3663771A1 (de) * | 2018-12-07 | 2020-06-10 | Volkswagen AG | Verfahren und system zum erfassen eines windes in einem geografischen bereich |
EP3663770A1 (de) * | 2018-12-07 | 2020-06-10 | Volkswagen AG | Verfahren und system zum erfassen eines auf ein fahrzeug einwirkenden windes |
WO2020158421A1 (ja) * | 2019-01-31 | 2020-08-06 | 日本電気株式会社 | 通信制御装置、通信システム、通信制御方法、及び非一時的なコンピュータ可読媒体 |
JPWO2020158421A1 (ja) * | 2019-01-31 | 2021-11-25 | 日本電気株式会社 | 通信制御装置、通信制御方法、及びプログラム |
JP7184100B2 (ja) | 2019-01-31 | 2022-12-06 | 日本電気株式会社 | 通信制御装置、通信制御方法、及びプログラム |
US11783701B2 (en) | 2019-01-31 | 2023-10-10 | Nec Corporation | Communication control apparatus, communication system, communication control method, and non-transitory computer-readable medium |
KR20200140427A (ko) * | 2019-06-05 | 2020-12-16 | 현대자동차주식회사 | 관성 주행 안내 기능 제어 방법 |
KR102682843B1 (ko) * | 2019-06-05 | 2024-07-10 | 현대자동차주식회사 | 관성 주행 안내 기능 제어 방법 |
JP2021062799A (ja) * | 2019-10-16 | 2021-04-22 | 株式会社デンソー | 車両の制御装置 |
JP7205440B2 (ja) | 2019-10-16 | 2023-01-17 | 株式会社デンソー | 車両の制御装置 |
JP2021070457A (ja) * | 2019-11-01 | 2021-05-06 | 株式会社デンソー | 車両の報知システム |
JP7375476B2 (ja) | 2019-11-01 | 2023-11-08 | 株式会社デンソー | 車両の報知システム、プログラム |
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CN109153384A (zh) | 2019-01-04 |
EP3466788A4 (en) | 2020-01-22 |
US10875534B2 (en) | 2020-12-29 |
JP6689136B2 (ja) | 2020-04-28 |
WO2017204006A1 (ja) | 2017-11-30 |
EP3466788A1 (en) | 2019-04-10 |
US20190100207A1 (en) | 2019-04-04 |
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