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Vehicle drive device

A drive device, wheel drive technology, applied in the direction of electrical devices, power devices, electric power devices, etc.

Active Publication Date: 2013-06-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In recent years, the demand for energy saving and improvement of fuel efficiency has become increasingly strong, and there is still room for improvement in the vehicle drive device described in Patent Document 1.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0153] Figure 12 It is a nomographic diagram of the speed of the rear-wheel drive device during left-right inverse torque control (before the target rotation is reached) while running at a high vehicle speed. In addition, in the figure, the vector which arises by the loss etc. which are stably applied to each rotation element mentioned above is abbreviate|omitted. When traveling at a high vehicle speed, as described above, the front-wheel drive is performed by the front-wheel drive device 6 , so the one-way clutch 50 is in a disengaged state. At this time, the hydraulic brakes 60A, 60B are controlled to be in a disengaged state. Therefore, the connected internal gears 24A, 24B are not locked and are in a rotating state.

[0154] In this state, the torque control is performed so that the first motor 2A generates the first motor torque TM1 in the forward direction according to the target torque, and the second motor 2B generates the second motor torque in the reverse directio...

no. 2 approach

[0188] Next, the left-right reverse torque control of the second embodiment will be described.

[0189] The left and right reverse torque control in this embodiment controls the first and second electric motors 2A, 2B so that the internal gears 24A, 24B become the internal gear target rotational speeds. In the following description, the following case will be described as an example. : To engage the hydraulic brakes 60A, 60B, a correction torque is added to the second electric motor 2B so that the internal gears 24A, 24B are in a zero-rotation state (the rotational speed is zero) so that the rotational speed of the second electric motor 2B becomes the motor target rotational speed.

[0190] Such as Figure 9 As described in , when the forward speed is high, the first and second electric motors 2A, 2B stop the power running drive, thereby acting on the planetary gear carriers 23A, 23B from the axle shafts 10A, 10B to perform forward travel. torque, the one-way clutch 50 become...

no. 3 approach

[0212] Next, the left-right reverse torque control of the third embodiment will be described.

[0213] The left and right reverse torque control in this embodiment controls the first and second electric motors 2A and 2B so that one of the planetary gears 22A and 22B becomes the planetary gear target rotation speed. In the following description, the following case is taken as an example. To explain, in order to prevent the backlash caused by the reversal of the rotation direction of the planetary gears 22A, 22B, the correction torque is added to the first motor 2A so that the rotation direction of the planetary gears 22A, 22B does not reverse. control.

[0214] Figure 21 (a) is a nomographic diagram of the speed of the rear-wheel drive device 1 during the left turn of the vehicle 3. In order to assist the turning of the vehicle 3, the rear-wheel drive device 1 uses the first electric motor 2A to generate a reverse direction according to the target torque. Torque control is p...

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Abstract

The present invention provides a vehicle drive device which can generate a desired yawing moment when left and right reverse torque control is carried out and control first and second motors to be at any target rotating speed simultaneously. A back-wheel drive device is equipped with a left-wheel drive unit possessing a first motor and a first planetary gear reducer arranged on the transmission paths of the first motor and a left back-wheel; a right-wheel drive unit possessing a second motor and a second planetary gear reducer arranged on the transmission paths of the second motor and a right back-wheel; and a control unit. The first motor is connected with a sun gear of the first planetary gear reducer, and the second motor is connected with a sun gear of the second planetary gear reducer; the left back-wheel is connected on a planetary gear carrier of the first planetary gear reducer, the right back-wheel is connected on a planetary gear carrier of the second planetary gear reducer, and inner gears are connected with each other.

Description

technical field [0001] The present invention relates to a vehicle drive system provided with a left wheel drive device for driving a left wheel and a right wheel drive device for driving a right wheel. Background technique [0002] Patent Document 1 discloses a driving device for a vehicle including a left wheel driving device and a right wheel driving device. The left wheel driving device has a first electric motor for driving the left wheel of the vehicle, A first planetary gear type transmission on the power transmission path of the left wheel, the right wheel drive device has a second motor that drives the right wheel of the vehicle, and a second motor that is arranged on the power transmission path between the second motor and the right wheel. Planetary gear transmission. In the first and second planetary gear transmissions, the first and second electric motors are respectively connected to the sun gear, the left wheel and the right wheel are respectively connected to ...

Claims

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Application Information

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IPC IPC(8): B60K17/16B60L50/15B60L50/16
CPCB60L7/14B60L7/26B60L15/2009B60L15/2036B60L15/2054B60L2210/40B60L2220/46B60L2240/12B60L2240/24B60L2240/421B60L2240/423B60L2240/461B60L2240/485B60L2240/486B60L2250/26B60L2260/28B60L2270/145B60L2220/50B60L50/61B60L50/16B60L58/12B60L50/66B60K7/0007B60K17/046B60K2007/0046B60K2007/0092B60Y2400/427B60K1/02Y02T10/62Y02T10/64Y02T10/70Y02T10/72Y02T10/7072
Inventor 筱原势野口真利安藤聪土桥诚
Owner HONDA MOTOR CO LTD
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