Booster and brake apparatus using the same

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United States of America Patent

PATENT NO 9896074
SERIAL NO

13366609

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Abstract

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An input rod is operated by a brake pedal to introduce the air into a variable-pressure chamber through a control valve to propel a power piston, thereby advancing a primary piston to generate a brake fluid pressure in a master cylinder. A part of the reaction force from the fluid pressure is transmitted to the input rod through a reaction member. The primary piston is provided with an idle stroke in which no fluid pressure is generated, and the reaction force to be transmitted to a plunger is limited by a reaction force adjusting spring. In the region of the idle stroke, a fluid pressure is supplied to a wheel cylinder through a fluid pressure control unit to perform regenerative cooperative control, and a reaction force from a reaction spring is applied to the input rod.

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Patent Owner(s)

Patent OwnerAddress
HITACHI ASTEMO LTD2520 TAKABA HITACHINAKA-SHI IBARAKI 312-8503

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Endo, Mitsuhiro Minami-ALPS, JP 26 156
Owada, Hiroshi Utsunomiya, JP 14 402

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