摘要:
A pneumatic brake booster comprising two working chambers, with each working chamber communicating a respective one of two reaction chambers. A divider dividing the reaction chambers provides a pressure feedback force to an input shaft. A selective valve (13) allows communication (C2) provided between the rear working chamber and the front reaction chamber to be closed, at least partially, when an airflow from the rear working chamber towards the front reaction chamber is higher than a predetermined amount. This allows the response time of the booster is adjusted.
摘要:
A regulator (1) having a casing (10) with at least one bore (11) therein. A piston (12) slidably located within the bore (11) to delimit first (13) and second (14) chambers. The first (13) and second (14) chambers being separated from one another by a valve (15) carried on the piston (12) and actuated by a push rod (16). Valve (15) include first (151) and second (152) balls which have different diameters and are mounted in line with respect to corresponding first (155) and second (156) seats. First (153) and second (154) springs act on and urge the first (151) and second (152) balls toward the first (155) and second (156) seats. Fluid pressure from a source (2) being presented to the first (13) chamber and acting on the piston (12) to initially move the second (152) ball into engagement with the push rod (16) and move the second (152) ball off the second seat (156) and thereafter move the first (151) ball into engagement with the second (152) ball and off the first (155) seat to allow fluid pressure to be communicated to the second (14) chamber by flowing past the first (155) and second (156) seats for distribution to a brake system (3).
摘要:
A device (100) for assembling a pneumatic booster (200). A cover (203) of the booster is housed in a support (101). A cylindrical cap (104) whose internal volume (107) is greater than a volume of a cylinder (206) of the booster, covers the cylinder placed on the cover. A gearing element (110) of the device rotates two sets of rollers (109A and 109B) about the booster. An eccentric (118) controlled by the gearing element allows an oscillating movement of the rollers against a wall of the booster. The swaging is achieved by alternately applying the rollers (109A) and (109B). An angle of attack (114A) of the first rollers is greater than an angle of attack (114B) of the second rollers. The invention also relates to a method of swaging a booster and such a booster.
摘要:
A device (100) for assembling a pneumatic booster (200) wherein a cover (203) of the booster is housed in a support (101) and a cylindrical cap (104) whose internal volume (107) is greater than a volume of a cylinder (206) of the booster, covers the cylinder placed on the cover. A gearing element (110) of the device rotates two sets of rollers (109A and 109B) about the booster and an eccentric (118) controlled by the gearing element allows an oscillating movement of the rollers against a wall of the booster. The swaging is achieved by alternately applying the rollers (109A) and (109B) and an angle of attack (114A) of the first rollers is greater than an angle of attack (114B) of the second rollers.
摘要:
This invention relates to a brake booster (201) having an axis (X), comprising an enclosure divided into a front chamber (210) and a rear chamber (208) by a skirt (209) fastened to a piston (205) mounted so that it can slide in the axial direction (X), the booster comprising a nonreturn valve (225) to evacuate air from the front chamber when the pressure prevailing exceeds a certain reference value.According to this invention, this booster is characterized in that this nonreturn valve (225) is internal to the booster (201).
摘要:
A boosted brake for actuating a primary piston (54) of a master cylinder through a feeler and a reaction disk having a decompression piston (62) that is elastically returned by a spring (70). The decompression piston (62) has at least two radial branches (64) that are housed in the primary piston (54) of the master cylinder to provide two boost ratios that differ according to the intensity of an input force applied by an operator to effect a brake application.
摘要:
A pneumatic servomotor for an assisted braking including an emergency-braking assistance device to increase the assistance ratio when an input force is applied to the control rod that is higher than a predetermined value through an extrusion of the reaction disk. The device (D) has a plastically-deformable first member (68) and second member (74) to accurately set a jump height of the servomotor and the activation force.
摘要:
A pneumatic servomotor (12) for an assisted braking having a rigid axial casing (16) with a movable substantially truncated-cone shaped transverse skirt (18) that is integral with a piston (20) for the actuation of an associated master cylinder (14) that defines two pressure chambers (24, 26) inside the casing. A substantially annular sealing diaphragm (30) made of an elastomeric material is interposed between the casing (16) and an outer peripheral area (32) of the skirt (18) has a substantially annular seal (34) made of an elastomeric material is interposed between an inner area of the skirt (18) and the piston (20). The sealing diaphragm (30) and the seal (34) have a portion that is moulded over the skirt (18).
摘要:
A boosted brake (10) having a booster (12) for activating a primary piston (54) of a master cylinder (14) by way of a feeler (42), a reaction disk (28) and a push rod (52). The push rod (52) that is housed a decompression piston (62) and returned elastically by a spring (70) to a position of rest has at least two radial branches (64) in order to provide two boost ratios which differ according to the intensity of the input force.
摘要:
A braking device, particularly for a motor vehicle, comprising a master cylinder (10) associated with a pneumatic booster (12), and a vacuum pump (36) to create a vacuum in the vacuum chamber (16) of the booster, characterized in that the vacuum pump (36) is fixed to the envelope (14) of the booster on the inside of the latter within the vacuum chamber (16).