| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a master cylinder capable of enhancing the feeling of the brake operation. <P>SOLUTION: The master cylinder 14 comprises a cylinder housing 60, a first piston 62 which is slidably stored in the cylinder housing 60 to form a first master liquid pressure chamber 78 and a first atmospheric pressure chamber 73 in the cylinder housing 60, a piston rod 70 for connecting the first piston 62 to a brake pedal 12, a relief port valve which communicates the first master liquid pressure chamber 78 with the first atmospheric pressure chamber 73 when the first piston 62 is at the initial position, and intercepts the communication of the first master liquid pressure chamber 78 with the first atmospheric pressure chamber 73 when the first piston 62 is moved forward from the initial position by the port idle Dpi or more, and a resistance force generation unit 96 for generating the resistance force against the forward movement of the first piston 62 before the first piston 62 is moved from the initial position by the port idle Dpi. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
