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Braking device for vehicles

A brake device and vehicle technology, applied in power devices, control devices, hydraulic brake transmission devices, etc., to achieve the effects of reducing average current consumption, improving durability, and reducing operating noises

Active Publication Date: 2016-06-29
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the vehicle braking device described in Patent Document 1, the electric motor must be driven at a high rotational speed all the time, so the life of the electric motor may be prematurely reached.
On the other hand, in the vehicle braking device described in Patent Document 2, the motor rotation speed is controlled in order to change the pump discharge flow rate, so it is possible to improve the durability of the electric motor.
However, no proposal has been made on how to control the motor speed under conditions where the load applied to the hydraulic pump fluctuates due to momentary changes in the degree of depression of the brake pedal.

Method used

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  • Braking device for vehicles
  • Braking device for vehicles
  • Braking device for vehicles

Examples

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Embodiment Construction

[0037] Hereinafter, a case where an embodiment of the vehicle braking device of the present invention is applied to a hybrid vehicle will be described with reference to the drawings. like figure 1 As shown, the brake device for vehicles is configured to be suitable for hybrid vehicles, and includes: hydraulic brake device B, regenerative brake device A, brake ECU (electronically controlled unit) 60 and a hybrid ECU (Electronic Control Unit) 19 that controls a motor 12 that is a driving source of the hybrid vehicle via an inverter 16 based on a request value from a brake ECU 60 , and the like.

[0038] A hybrid vehicle is a vehicle in which drive wheels such as left and right front wheels FL and FR are driven by a hybrid system. The hybrid system is a power train that uses two power sources of the engine 11 and the motor 12 in combination. As for the hybrid system, there are parallel hybrid systems in which the wheels are directly driven by both the engine 11 and the motor 1...

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Abstract

The present invention relates to a brake device for a vehicle, and provides a brake device for a vehicle capable of improving the durability of an electric motor that drives a hydraulic pump that generates control hydraulic pressure. The discharge flow rate of the hydraulic pump (37, 47) is obtained from the change of the control hydraulic pressure for obtaining the braking force corresponding to the brake operation, and the discharge flow rate of the hydraulic pump (37, 47) is added to the discharge flow rate of the obtained hydraulic pump (37, 47). The upper hydraulic control valve (31, 41) can normally operate the overflow flow, so as to obtain the required minimum discharge flow of the hydraulic pump (37, 47). The hydraulic pumps ( 37 , 47 ) are driven by the electric motor (M), and therefore the calculated minimum required discharge flow rate of the hydraulic pumps ( 37 , 47 ) corresponds to the minimum required rotation speed of the electric motor (M). Therefore, when the desired control hydraulic pressure is reached, the rotation speed of the electric motor (M) can be reduced from a high rotation speed to a low rotation speed, so that the durability of the electric motor (M) can be improved.

Description

technical field [0001] The present invention relates to a vehicle brake device that generates a control hydraulic braking force that compensates for a shortage of braking force applied to wheels according to a brake operation state. Background technique [0002] Conventionally, for example, a vehicle braking device including a hydraulic braking device and a regenerative braking device described in Patent Document 1 is known. The hydraulic brake device generates base hydraulic pressure corresponding to the braking operation in the master cylinder, and applies the generated base hydraulic pressure to the wheel cylinders of each wheel connected by the oil pipe existing between the master cylinder and the hydraulic control valve, so that each wheel Generates base hydraulic braking force. In addition, the electric motor is driven according to the control hydraulic pressure command value to drive the hydraulic pump provided at the same time as the hydraulic control valve to gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/17B60T11/16
CPCB60T2270/604B60T1/10B60T13/586B60T13/662B60Y2300/89B60L1/003B60L7/14B60L7/18B60L7/26B60L15/2009B60L2210/40B60L2240/421B60L2250/26B60L2270/142B60K6/445B60L50/61B60L50/16Y02T10/62Y02T10/64Y02T10/72Y02T10/7072Y02T10/70
Inventor 松浦正裕内藤政行森下和哉大石正悦
Owner ADVICS CO LTD