Power device for vehicle
A technology of power plant and braking device, which is applied to control devices, vehicle components, electric vehicles, etc., can solve the problems of vehicle idling, control failure, and inability to ensure vehicle driving performance, so as to achieve stable driving performance and prevent sideslip.
Inactive Publication Date: 2019-09-24
HONDA MOTOR CO LTD
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Problems solved by technology
[0007] However, in the conventional power plant, when one motor fails, the differential limiting mechanism is driven on the condition that the vehicle stops.
Therefore, for example, when a breakdown occurs while driving on an expressway, the power control to cope with the breakdown state cannot be performed at all during the period from the high-speed driving state to the actual stop of the vehicle, and stable driving performance of the vehicle may not be ensured.
In particular, when a motor failure occurs during turning, the vehicle may sometimes cause idling or abnormal steering failure, and this problem is particularly noticeable in such a case.
Method used
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Embodiment Construction
[0057] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. figure 1 The vehicle power plant 1 according to the first embodiment is shown. This power plant 1 is mounted on a four-wheeled vehicle (not shown), and distributes and transmits the power of the first motor MG1 and the second motor MG2 to the left and right drive wheels WL, WR via the left and right drive shafts SL, SR.
[0058] The power unit 1 includes the above-mentioned first and second motors MG1 and MG2, a planetary gear device PG, a differential limiting mechanism MC, and a brake device SD. The first and second motors MG1 and MG2 and the planetary gear unit PG are arranged coaxially with the left and right drive shafts SL and SR.
[0059] The first motor MG1 is constituted by, for example, an AC motor, and has a first stator 11 a including a plurality of iron cores, coils, and the like, and a first rotor 11 b including a plurality of magnets a...
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Provided is a power device for a vehicle, the power device being capable of ensuring stable travel performance of the vehicle during turning without stopping the vehicle when one of two power sources fails. A planetary gear device of a power device of a vehicle according to the present invention has five rotational elements, and first and second outer rotation elements (first and second sun gears) that satisfy a column line relationship in which the rotational speeds are arranged on a single straight line in a column line diagram, the first and second outer rotation elements (first and second sun gears) being coupled to the first and second motors, respectively, and the first and second inner rotation elements (second and first ring gears) being coupled to the left and right drive wheels, respectively. Furthermore, when one of the first and second motors is in a malfunctioning state, the differential limiting mechanism is operated to connect the first and second outer rotating elements, and the braking torque of the drive wheel is controlled so as to prevent sideslip of the vehicle.
Description
technical field [0001] The present invention relates to a power transmission device for a vehicle that transmits power to left and right driving wheels that can rotate at a differential speed, and more particularly to a power transmission device for a vehicle that controls power using a differential limiting mechanism. Background technique [0002] As a conventional vehicle power plant, for example, a vehicle power plant disclosed in Patent Document 1 is known. This power unit transmits the power of the first and second motors (electric motors) to the left and right drive wheels via the first and second planetary gear mechanisms. The first planetary gear mechanism has a first sun gear, a first carrier, and a first ring gear, and the second planetary gear mechanism has a second sun gear, a second carrier, and a second ring gear. The first carrier is connected to the first motor and the second sun gear, and the second carrier is connected to the second motor and the first sun...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B60K17/04B60L15/20
CPCB60K17/046B60L15/2036Y02T10/72
Inventor 本多健司
Owner HONDA MOTOR CO LTD