Low pressure accumulator for anti-lock brake system
A low pressure accumulator for an anti-lock brake system of a vehicle. The low pressure accumulator includes a cylinder having one end communicated with a fluid path connected to a valve and a pump and an opposite end formed with an opening, a piston moving back and forth in the cylinder, a spring installed in the cylinder to elastically support the piston, and a plug installed in the opening of the cylinder to support one end of the spring. The plug includes a vent to ventilate air through an inside and an outside of the cylinder.
1. An anti-lock brake system comprising:
a low pressure accumulator,
wherein the low pressure accumulator comprises:
a cylinder having one end communicated with a fluid path connected to a valve and a pump and an opposite end formed with an opening;
a piston moving back and forth in the cylinder;
a spring installed in the cylinder to elastically support the piston; and
a plug installed in the opening of the cylinder to support one end of the spring,
plug includes a vent to ventilate air through an inside and an outside of the cylinder, and
wherein the vent is formed in an outer peripheral surface of the plug.
2. The anti-lock brake system of claim 1 , wherein the plug is provided at an outer peripheral portion thereof with a flange and the vent is formed in the flange.
3. The anti-lock brake system of claim 1 , wherein the vent is disposed between the low pressure accumulator and the plug.
4. The anti-lock brake system of claim 1 , wherein the vent has a slot shape.
5. The anti-lock brake system of claim 1 , wherein the vent has a variable depth.
6. An anti-lock brake system comprising:
a low pressure accumulator,
wherein the low pressure accumulator comprises:
a cylinder having one end communicated with a fluid path connected to a valve and a pump and an opposite end formed with an opening;
a modulator block having a stepped groove formed at an inner peripheral surface of the cylinder adjacent to the opening;
a piston moving back and forth in the cylinder;
a spring installed in the cylinder to elastically support the piston;
a plug including a flange inserted into the stepped groove and supporting one end of the spring; and
a vent provided in the plug to ventilate air through an inside and an outside of the cylinder, and
wherein the vent is formed by incising a peripheral portion of the flange to allow air to flow between the stepped groove and the flange.
7. The anti-lock brake system of claim 1 , wherein the vent comprises a groove.
8. The anti-lock brake system of claim 1 , wherein the vent comprises a plurality of grooves respectively arranged circumferentially around the outer peripheral surface.
9. The anti-lock brake system of claim 1 , wherein the outer peripheral surface is a side surface.
10. The anti-lock brake system of claim 1 , wherein the plug includes an outwardly extending flange, and the vent is formed in the flange.
11. The anti-lock brake system of claim 10 , wherein the flange extends from an end of the plug which faces the piston.