Patent ID: 9114725
Filing Date: 2015-08-25
Classification: B60L,Y02T

Abstract:
1. A vehicle drive device comprising: a vehicle controller; a left wheel drive unit comprising: a right wheel drive unit comprising: an electric motor controller that controls the first electric motor and the second electric motor, wherein each of the first and second speed changers comprises first to third rotation elements, the first electric motor is connected to the first rotation element of the first speed changer, the second electric motor is connected to the first rotation element of the second speed changer, the left wheel is connected to the second rotation element of the first speed changer, the right wheel is connected to the second rotation element of the second speed changer, the third rotation element of the first speed changer and the third rotation element of the second speed changer are connected to each other, wherein the vehicle drive device further comprises: a first rotation state amount detector disposed to detect a first rotation state amount serving as a rotation state amount of the first electric motor or a rotation state amount of the first rotation element of the first speed changer; a second rotation state amount detector disposed to detect a second rotation state amount serving as a rotation state amount of the left wheel or a rotation state amount of the second rotation element of the first speed changer; a third rotation state amount detector disposed to detect a third rotation state amount serving as a rotation state amount of the second electric motor or a rotation state amount of the first rotation element of the second speed changer: and a fourth rotation state amount detector disposed to detect a fourth rotation state amount serving as a rotation state amount of the right wheel or a rotation state amount of the second rotation element of the second speed changer, wherein the vehicle controller is configured to determine the fourth rotation state amount by the following (A) or (B): (A) the vehicle controller is configured to calculate a rotation state amount of the third rotation element as a third rotation element rotation state amount conversion value by using a first rotation state amount detection value detected by the first rotation state amount detector and a second rotation state amount detection value detected by the second rotation state amount detector, and the vehicle controller is configured to determine that a fourth rotation state amount conversion value or a fourth rotation state amount detection value, whichever is greater, is used as the fourth rotation state amount, wherein the fourth rotation state amount conversion value serves as a rotation state amount at an installation position of the fourth rotation state amount detector and the vehicle controller is configured to calculate the fourth rotation state amount conversion value by using the third rotation element rotation state amount conversion value and a third rotation state amount detection value detected by the third rotation state amount detector, wherein the fourth rotation state amount detection value is detected using the fourth rotation state amount detector, (B) the vehicle controller is configured to calculate the rotation state amount of the third rotation element as a third rotation element rotation state amount conversion value by using a first rotation state amount detection value detected by the first rotation state amount detector and a second rotation state amount detection value detected by the second rotation state amount detector, and the vehicle controller is configured to calculate a third rotation state amount conversion value serving as a rotation state amount at an installation position of the third rotation state amount detector by using the third rotation element rotation state amount conversion value and a fourth rotation state amount detection value detected by the fourth rotation state amount detector, and determine whether third rotation state amount conversion value is larger than a third rotation state amount detection value detected by the third rotation state amount detector, and if so, the vehicle controller is configured to use the fourth rotation state amount detection value is used as the fourth rotation state amount, and if the third rotation state amount conversion value is smaller than the third rotation state amount detection value, the vehicle controller is configured to use a fourth rotation state amount conversion value as the fourth rotation state amount, wherein the fourth rotation state amount conversion value serves as a rotation state amount at an installation position of the fourth rotation state amount detector and is obtained by using the third rotation element rotation state amount conversion value and the third rotation state amount detection value.