PUMP UNIT OF ELECTRONIC CONTROL BRAKE SYSTEM

• US 20150030483A1
• Filed: 06/18/2014
• Published: 01/29/2015
• Est. Priority Date: 07/25/2013
• Status: Abandoned Application

• Current Assignee: Mando Corporation
• Original Assignee: Mando Corporation
• Inventors: RYU, Dong-Yo
• Application Number:
  US14/308,416
• Publication Number:
  US 20150030483A1
• Time in Patent Office: Days
• US Class Current: 417/539
• CPC Class Codes: B60T 10/04 with hydrostatic brake
• CPC Class Codes: B60T 13/143 Master cylinder mechanically coupled with booster
• CPC Class Codes: B60T 13/146 Part of the system directly actuated by booster pressure
• CPC Class Codes: B60T 13/662 characterised by specified functions of the control system components
• CPC Class Codes: B60T 13/686 in hydraulic systems or parts thereof
• CPC Class Codes: B60T 17/02 Arrangements of pumps or compressors, or control devices therefor
• CPC Class Codes: B60T 17/221 Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M
• CPC Class Codes: B60T 8/4031 Pump units characterised by their construction or mounting pump units in combination with valve blocks B60T8/36
• CPC Class Codes: B60T 8/4872 pump-back systems
• CPC Class Codes: F04B 1/0417 consisting of two or more cylindrical elements, e.g. rollers
• CPC Class Codes: F04B 9/04 the means being cams, eccentrics or pin-and-slot mechanisms
• CPC Class Codes: F04B 9/042 the means being cams

Abstract

Disclosed is a pump unit of an electronic control brake system installed in a bore formed in a modulator block, the pump unit including a motor having a rotating shaft, a carrier having a center portion thereof installed on the rotating shaft, and provided with connecting shafts that are spaced apart from the center portion to both sides by a predetermined interval to be disposed in line with each other, a pressing member installed on each of the connecting shafts, and a first piston pump and a second piston pump each provided with a piston configured to be reciprocated by making contact with an outer circumferential surface of the pressing member according to rotation of the carrier, the first piston pump and the second piston pump disposed in line with each other.

Claims

1. A pump unit of an electronic control brake system installed in a bore formed in a modulator block, the pump unit comprising:

a motor having a rotating shaft;

a carrier having a center portion thereof installed on the rotating shaft, and provided with connecting shafts that are spaced apart from the center portion to both sides by a predetermined interval to be disposed in line with each other;

a pressing member installed on each of the connecting shafts; and

a first piston pump and a second piston pump each provided with a piston configured to be reciprocated by making contact with an outer circumferential surface of the pressing member according to rotation of the carrier, the first piston pump and the second piston pump disposed in line with each other.

2. The pump unit of claim 1, wherein the pressing member is a bearing or a roller that is rotatably installed on the connecting member.

3. The pump unit of claim 1, further comprising a third piston pump and a fourth piston pump that are each provided with a piston reciprocated by making contact with the outer circumferential surface of the pressing member according to rotation of the carrier, the third piston pump and the fourth piston pump disposed in line with each other and spaced apart from the first piston pump and the second piston pump.

5. The pump unit of claim 3, wherein an edge of each of the piston s which makes contact with the pressing member is rounded.

4. The pump unit of clam 3, wherein the first piston pump and the second piston pump are circumferentially spaced apart from the third piston pump and the fourth piston pump by angles of 90 degrees, respectively, with respect to the carrier, so that the first and second piston pumps perform a pumping operation sequentially with the third and fourth piston pumps.