| 摘要 |
PROBLEM TO BE SOLVED: To provide a simply structured electronic control type brake booster for producing brake line pressure in proportion to external pilot pressure. SOLUTION: An air passage 11 is formed differently from a passage 10 for engine negative pressure, a pressure adjusting valve 2 is provided in this air passage 11 and communicated with the work room 4a of a diaphragm 4, the operation of a servo valve mechanism is controlled via a cylindrical member 7 by applying external pilot pressure to a work plunger 5 for plotting the work room 4a and thus brake line pressure proportional to the external pilot pressure is produced. |
