A pneumatic brake booster includes a drive piston actuating a master cylinder by a push rod while being returned to rest position by a return spring. The brake booster has a vibration damper having a part made of an elastic material working compressively, of overall parallelepipedic shape, with a length greater than the spacing of two coils of the spring prior to its installation in the brake booster and whose front and back faces are equipped with a longitudinal slit penetrating the material mass of the damper for engagement by way of those slits on the two coils of the return spring.

A pneumatic brake booster includes a drive piston actuating a master cylinder by a push rod while being returned to rest position by a return spring. The brake booster has a vibration damper having a part made of an elastic material working compressively, of overall parallelepipedic shape, with a length greater than the spacing of two coils of the spring prior to its installation in the brake booster and whose front and back faces are equipped with a longitudinal slit penetrating the material mass of the damper for engagement by way of those slits on the two coils of the return spring.

A pneumatic brake booster having a booster housing. The booster housing has at least two thin-walled shell elements and an elastomer sealing element. The sealing element has a sealing bead, which is of encircling form radially at the outside, and at least one rolling diaphragm portion which adjoins the sealing bead. The sealing bead is sealingly clamped in a clamping space between the shell elements. The clamping space is formed by walls which are generated in the shell elements by deformation, its radial inner wall formed by a tubular, axially forwardly extending projection, which is folded at its front edge, of the second shell element. It is proposed that a bead-side rear wall of the clamping space is formed by an encircling, radially outwardly projecting collar which is formed on the second shell element.

A brake booster for a vehicle is provided. The booster includes a casing formed by a combination of a front and rear shell. A diaphragm divides the casing into a constant and a variable pressure room. A circumference of a front side end seals a valve body combined with the diaphragm and a rear portion penetrates the rear shell. A high pressure air passage selectively provides high pressure air from the rear portion to the variable pressure room and a bypass passage selectively provides atmospheric air to the variable pressure room. A check valve provides high pressure air passed a turbo charger and an intercooler to the variable pressure room through the high pressure air passage. An input rod advances and retreats through an air valve of the valve body. An output rod delivers force based on displacement of the air valve and the diaphragm to a master cylinder.

A brake booster for a vehicle is provided. The booster includes a casing formed by a combination of a front and rear shell. A diaphragm divides the casing into a constant and a variable pressure room. A circumference of a front side end seals a valve body combined with the diaphragm and a rear portion penetrates the rear shell. A high pressure air passage selectively provides high pressure air from the rear portion to the variable pressure room and a bypass passage selectively provides atmospheric air to the variable pressure room. A check valve provides high pressure air passed a turbo charger and an intercooler to the variable pressure room through the high pressure air passage. An input rod advances and retreats through an air valve of the valve body. An output rod delivers force based on displacement of the air valve and the diaphragm to a master cylinder.

A pneumatic brake booster having a booster housing. The booster housing has at least two thin-walled shell elements and an elastomer sealing element. The sealing element has a sealing bead, which is of encircling form radially at the outside, and at least one rolling diaphragm portion which adjoins the sealing bead. The sealing bead is sealingly clamped in a clamping space between the shell elements. The clamping space is formed by walls which are generated in the shell elements by deformation, its radial inner wall formed by a tubular, axially forwardly extending projection, which is folded at its front edge, of the second shell element. It is proposed that a bead-side rear wall of the clamping space is formed by an encircling, radially outwardly projecting collar which is formed on the second shell element.

A brake booster for a vehicle is provided. The booster includes a casing formed by a combination of a front and rear shell. A diaphragm divides the casing into a constant and a variable pressure room. A circumference of a front side end seals a valve body combined with the diaphragm and a rear portion penetrates the rear shell. A high pressure air passage selectively provides high pressure air from the rear portion to the variable pressure room and a bypass passage selectively provides atmospheric air to the variable pressure room. A check valve provides high pressure air passed a turbo charger and an intercooler to the variable pressure room through the high pressure air passage. An input rod advances and retreats through an air valve of the valve body. An output rod delivers force based on displacement of the air valve and the diaphragm to a master cylinder.

A brake booster for a vehicle is provided. The booster includes a casing formed by a combination of a front and rear shell. A diaphragm divides the casing into a constant and a variable pressure room. A circumference of a front side end seals a valve body combined with the diaphragm and a rear portion penetrates the rear shell. A high pressure air passage selectively provides high pressure air from the rear portion to the variable pressure room and a bypass passage selectively provides atmospheric air to the variable pressure room. A check valve provides high pressure air passed a turbo charger and an intercooler to the variable pressure room through the high pressure air passage. An input rod advances and retreats through an air valve of the valve body. An output rod delivers force based on displacement of the air valve and the diaphragm to a master cylinder.

A pneumatic pressure brake booster system includes an air pressure chamber; an ambient air chamber; a flexible diaphragm separating the air pressure chamber and the ambient air chamber; at least one air pressure source communicating with the air pressure chamber; a brake pedal shaft engaged by and movable with the diaphragm; and a brake master cylinder engaged by the brake pedal shaft.

A pneumatic pressure brake booster system includes an air pressure chamber; an ambient air chamber; a flexible diaphragm separating the air pressure chamber and the ambient air chamber; at least one air pressure source communicating with the air pressure chamber; a brake pedal shaft engaged by and movable with the diaphragm; and a brake master cylinder engaged by the brake pedal shaft.