JP7327256B2 - 電動車両の回生制動制御装置 - Google Patents
電動車両の回生制動制御装置 Download PDFInfo
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Description
電動車両は、後輪駆動であってよい。
上記の実施形態では、路面摩擦係数取得部101は、外気温センサ130が検出した外気温度に基づいて、路面摩擦係数(路面μ)を推定し、低μ路であるか、あるいは、高μ路であるかを取得しており、比較的簡便に、路面摩擦係数を推定していた。しかし、路面摩擦係数取得部101で路面摩擦係数を取得する方法は、これに限られない。たとえば、複数波長の赤外線レーザーを路面に向かって照射し、その反射を測定することにより、路面の摩擦係数、および路面状態(ドライ、ウエット、凍結など)を検出し、路面摩擦係数を取得するものであってよい。また、電動車両1の車体速度と後輪50(駆動輪)の車輪速度から加速時のスリップ率を求め、このスリップ率と加速度の最大値に基づいて、路面摩擦係数を推定するようにしても良い。
Claims (5)
- 走行用の回転電機を備えた電動車両の回生制動制御装置であって、
路面摩擦係数を取得する路面摩擦係数取得部と、
前記電動車両の減速時に前記回転電機の回生トルクを制御する回生トルク制御部と、を備え、
前記回生トルク制御部は、前記路面摩擦係数取得部が取得した路面摩擦係数が小さい場合は、路面摩擦係数が大きい場合に比較して、前記回生トルクの最大値を小さくするとともに、回生開始時の回生トルクの立ち上がり勾配を大きくするよう構成されている、電動車両の回生制動制御装置。 - 前記回生トルク制御部は、前記回生トルクによる前記電動車両の減速度の最大値が、路面摩擦係数が小さい場合と路面摩擦係数が大きい場合とで同じ値となるように、前記回生トルクの立ち上がり勾配および前記回生トルクの大きさを制御するよう構成されている、請求項1に記載の電動車両の回生制動制御装置。
- 前記電動車両は、内燃機関を備えたハイブリッド車両であって、
前記電動車両は、所定の状態において、減速時に、前記電動車両の減速時に前記回転電機の回生を実行せず、前記内燃機関の抵抗による制動力を用いて減速を行うよう構成されており、
前記回生トルク制御部は、前記回生トルクによる前記電動車両の減速度の最大値が、前記回転電機の回生を行わない場合の前記電動車両の減速度の最大値になるように、前記回生トルクの立ち上がり勾配および前記回生トルクの大きさを制御するよう構成されている、請求項1に記載の電動車両の回生制動制御装置。 - 前記路面摩擦係数取得部は、外気温度が低いとき、路面摩擦係数が小さいと推定する、請求項1から請求項3のいずれか1項に記載の電動車両の回生制動制御装置。
- 前記電動車両は、後輪駆動である、請求項1から請求項4のいずれか1項に記載の電動車両の回生制動制御装置。
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