JP2012077650A5

JP2012077650A5 -

Info

Publication number: JP2012077650A5
Application number: JP2010222222A
Authority: JP
Filing date: 2010-09-30
Publication date: 2013-09-19
Anticipated expiration: 2030-09-30

Description

上記課題を解決するため、本発明では、車両のエンジン（１２）を自動的に停止させるための停止制御及び前記エンジン（１２）を自動的に再始動させるための再始動制御を行う車両の制御装置であって、前記停止制御の実行条件が成立したか否かを判定する第１の判定手段（５５、Ｓ１１）と、前記停止制御の実行条件が成立したと判定された場合、エンジン（１２）の停止を許可する停止制御手段（５５、Ｓ１５）と、エンジン（１２）が停止された状態での坂路走行時に、停車後の車両のずり下がりが発生するか否かを判定する第２の判定手段（５５、Ｓ２１）と、前記ずり下がりが発生すると判定されたときには、車両のずり下がり距離（Ｌ）が許容距離（Ｌａ）を超えるまでにエンジン（１２）の再始動が完了するように同エンジン（１２）の自動的な再始動の開始を許可する再始動制御手段（５５）と、エンジン（１２）の停止前に、エンジン（１２）の停止から前記再始動までの予想されるエンジン停止期間で節減しうる燃料節減量（Ｔｅｓ）を予測し、前記燃料節減量（Ｔｅｓ）が、エンジン（１２）の前記再始動に要する燃料消費量に応じて設定された設定値（Ｔ１）以上であるか否かを判定する第３の判定手段（５５、Ｓ１２、Ｓ１３）と、を備え、前記停止制御手段（５５）は、前記燃料節減量（Ｔｅｓ）が前記設定値（Ｔ１）未満であると判定された場合は、前記停止制御の実行条件が成立してもエンジン（１２）の停止を許可しないことを要旨とする。 In order to solve the above-described problems, in the present invention, stop control for automatically stopping the engine (12) of the vehicle and control of the vehicle for performing restart control for automatically restarting the engine (12). A first determination means (55, S11) for determining whether or not the stop control execution condition is satisfied; and when it is determined that the stop control execution condition is satisfied, the engine (12 And a second stop control means (55, S15) for permitting the stop of the vehicle (2) to determine whether or not the vehicle will slide down after the vehicle stops when traveling on a slope with the engine (12) stopped. When the determination means (55, S21) and when it is determined that the sliding occurs, the restart of the engine (12) is completed before the vehicle sliding distance (L) exceeds the allowable distance (La). Same engine And restart control means for permitting the start of the automatic restart (12) (55), before stopping the engine (12), an engine stop period to be expected from the stop of the engine (12) to said restart The amount of fuel saved (Tes) that can be saved in the vehicle is predicted, and the amount of fuel saved (Tes) is not less than the set value (T1) set according to the fuel consumption required for the restart of the engine (12). Third stop means (55, S12, S13) for determining whether or not the stop control means (55) has the fuel saving amount (Tes) less than the set value (T1). If it is determined, the gist is that the engine (12) is not allowed to stop even if the execution condition of the stop control is satisfied.

上記構成によれば、エンジンの停止前に、エンジンの停止から再始動までの予想されるエンジン停止期間で節減される燃料節減量が予測され、予測の燃料節減量がエンジンの再始動に要する燃料消費量に応じて設定された設定値未満であると判定された場合は、停止制御の実行条件が成立しても、エンジンの停止が許可されない。このため、燃料節減に寄与しえないエンジンの不要な停止を極力回避しつつ、登坂路での停車時における車両のずり下がりを好適に防止することができる。 According to the above configuration, the fuel saving amount to be saved in the expected engine stop period from the engine stop to the restart is predicted before the engine is stopped, and the predicted fuel saving amount is the fuel required for the engine restart. If it is determined that the value is less than the set value set according to the consumption, the engine stop is not permitted even if the stop control execution condition is satisfied. Therefore, it is possible to suitably prevent the vehicle from sliding down when stopping on an uphill road while avoiding unnecessary stopping of the engine that cannot contribute to fuel saving as much as possible.

本発明に係る車両の制御装置では、前記第３の判定手段（５５、Ｓ１２、Ｓ１３）は、エンジン（１２）の停止から再始動までの予想されるエンジン停止可能予想時間（Ｔｅｓ）を求め、前記燃料節減量が前記設定値以上であるか否かの判定は、前記エンジン停止可能予想時間（Ｔｅｓ）が、前記設定値をエンジン（１２）のアイドル時間に換算した設定時間（Ｔ１）以上であるか否かを判定することによって行うことが好ましい。 In the control apparatus for a vehicle according to the present invention, the third judging means (55, S12, S13) obtains the engine (12) of the expected engine stop predictable time from stop to restart (Tes), The determination as to whether or not the fuel saving amount is equal to or greater than the set value is based on whether or not the expected engine stoppage possible time (Tes) is equal to or greater than a set time (T1) obtained by converting the set value to an idle time of the engine (12) It is preferable to carry out by determining whether or not there is.

上記構成によれば、エンジンの停止から再始動までの予想されるエンジン停止可能予想時間が、アイドル時間換算の設定時間以上であるか否かが判定される。このため、例えばエンジンの燃料室内へ燃料を噴射する燃料噴射装置の燃料噴射量を取得するなどしなくても、車両に設けられた既存のセンサ（例えば車速センサ等）の検出値を用いて、判定に必要な判定値を比較的簡単に取得できる。このため、判定に必要な処理が複雑にならずに済む。 According to the above-described configuration, it is determined whether or not the expected expected engine stop time from the engine stop to the restart is equal to or longer than the set time calculated in terms of idle time. For this reason, for example, without obtaining the fuel injection amount of a fuel injection device that injects fuel into the fuel chamber of the engine, the detection value of an existing sensor (such as a vehicle speed sensor) provided in the vehicle is used. Determination values necessary for determination can be acquired relatively easily. For this reason, the processing necessary for the determination is not complicated.

本発明は、車両のエンジン（１２）を自動的に停止させるための停止制御及び前記エンジン（１２）を自動的に再始動させるための再始動制御を行う車両の制御方法であって、前記停止制御の実行条件が成立したか否かを判定する第１の判定ステップ（５５、Ｓ１１）と、前記停止制御の実行条件が成立したと判定された場合、エンジン（１２）の停止を許可する停止制御ステップ（５５、Ｓ１５）と、エンジン（１２）が停止された状態での坂路走行時に、停車後の車両のずり下がりが発生するか否かを判定する第２の判定ステップ（５５、Ｓ２１）と、前記ずり下がりが発生すると判定されたときには、車両のずり下がり距離（Ｌ）が許容距離（Ｌａ）を超えるまでにエンジン（１２）の再始動が完了するように同エンジン（１２）の自動的な再始動を開始する再始動制御ステップ（５５）と、エンジン（１２）の停止前に、エンジン（１２）の停止から前記再始動までの予想される停止期間で節減しうる燃料節減量を予測し、前記燃料節減量（Ｔｅｓ）が、エンジン（１２）の前記再始動に要する燃料消費量に応じて設定された設定値（Ｔ１）以上であるか否かを判定する第３の判定ステップ（５５、Ｓ１２、Ｓ１３）と、を備え、前記停止制御ステップ（５５、Ｓ１５）は、前記燃料節減量（Ｔｅｓ）が前記設定値（Ｔ１）未満であると判定された場合は、前記停止制御の実行条件が成立してもエンジン（１２）の停止を許可しないことを要旨とする。上記構成によれば、上記車両の制御装置に係る発明と同様の作用効果を得ることができる。 The present invention is a vehicle control method for performing stop control for automatically stopping a vehicle engine (12) and restart control for automatically restarting the engine (12), wherein the stop A first determination step (55, S11) for determining whether or not a control execution condition is satisfied, and a stop that permits the engine (12) to stop when it is determined that the stop control execution condition is satisfied. A control step (55, S15) and a second determination step (55, S21) for determining whether or not the vehicle will slip after stopping when traveling on a slope with the engine (12) stopped. If, when the slip-down is determined to occur, the engine as the restart of the engine to fall downhill distance of the vehicle (L) exceeds the allowable distance (La) (12) is completed (12) self Specific and restarting control step of starting the restart (55), before stopping the engine (12), the fuel savings that can be saved in the expected stop period from the stop of the engine (12) to said restart A third determination step that predicts and determines whether or not the fuel saving amount (Tes) is equal to or greater than a set value (T1) set according to the fuel consumption required for the restart of the engine (12). (55, S12, S13), and when the stop control step (55, S15) determines that the fuel saving amount (Tes) is less than the set value (T1), the stop control The gist of the invention is that the engine (12) is not allowed to stop even if the execution condition is satisfied. According to the said structure, the effect similar to the invention which concerns on the said vehicle control apparatus can be acquired.

Claims

A vehicle control device that performs stop control for automatically stopping a vehicle engine (12) and restart control for automatically restarting the engine (12),
First determination means (55, S11) for determining whether or not an execution condition for the stop control is satisfied;
A stop control means (55, S15) that permits the engine (12) to stop when it is determined that the execution condition of the stop control is satisfied;
Second judging means (55, S21) for judging whether or not the vehicle slips after stopping when traveling on a slope with the engine (12) stopped;
When it is determined that the slip occurs, the engine (12) is automatically restarted so that the restart of the engine (12) is completed before the vehicle slip distance (L) exceeds the allowable distance (La). Restart control means (55) for allowing start of restart;
Before the engine (12) is stopped, a fuel saving amount (Tes) that can be saved in an expected engine stop period from the stop of the engine (12) to the restart is predicted, and the fuel saving amount (Tes) is Third determining means (55, S12, S13) for determining whether or not the fuel consumption amount required for restarting the engine (12) is equal to or greater than a set value (T1).
When it is determined that the fuel saving amount (Tes) is less than the set value (T1), the stop control means (55) stops the engine (12) even if the stop control execution condition is satisfied. The vehicle control device is characterized by not permitting.

The third determination means (55, S12, S13)
Obtains an engine stop predictable time (Tes) expected to restart from the stop of the engine (12),
The determination as to whether or not the fuel saving amount is equal to or greater than the set value is based on whether or not the expected engine stoppage possible time (Tes) is equal to or greater than a set time (T1) in which the set value is converted into an idle time of the engine (12). The vehicle control device according to claim 1, wherein the vehicle control device is performed by determining whether or not there is the vehicle.

A vehicle control method for performing stop control for automatically stopping a vehicle engine (12) and restart control for automatically restarting the engine (12),
A first determination step (55, S11) for determining whether or not an execution condition for the stop control is satisfied;
A stop control step (55, S15) for allowing the engine (12) to stop when it is determined that the execution condition of the stop control is satisfied;
A second determination step (55, S21) for determining whether or not the vehicle slips after stopping when traveling on a slope with the engine (12) stopped;
When the slip-down is determined to occur, automatic of the engine as the restart of the engine to fall downhill distance of the vehicle (L) exceeds the allowable distance (La) (12) is completed (12) A restart control step (55) for initiating restart;
Before the engine (12) is stopped, a fuel saving amount that can be saved in an expected stop period from the stop of the engine (12) to the restart is predicted, and the fuel saving amount (Tes) is determined by the engine (12). And a third determination step (55, S12, S13) for determining whether or not the set value (T1) is greater than or equal to the fuel consumption required for the restart,
In the stop control step (55, S15), if it is determined that the fuel saving amount (Tes) is less than the set value (T1), the engine (12) even if the stop control execution condition is satisfied. The vehicle control method is characterized by not permitting the stop of the vehicle.