A vacuum pump for automobiles used for brake application is provided wherein a method of reducing power consumption and running torque in a vacuum pump of a motor vehicle is explained. The present invention also provides a vacuum pump for automobiles comprising an actuator, a new vane locking assembly, a new vane and rotor assembly, a new non return valve assembly, the controlled oil supply means and a reed stopper assembly that reduces power loss and unnecessary frictional forces and to maintain a controlled oil supply to the vacuum pump.

A manually adjustable aspirator is disclosed for use in a vacuum system for a vehicle having a vacuum source. The aspirator includes a passageway having a diameter that can be adjusted by a vehicle operator for different altitudes. The aspirator includes a body, a passageway having a narrowed aperture defined by opposed cones, and a manually adjustable flow adjuster having an adjustment knob. A brake booster is connected to the aspirator. An air intake is connected with a vacuum source and the aspirator. The cones include first and second cones each having a narrowed end. The narrowed ends are joined at a narrow aperture that defines an inner diameter. The flow rate adjuster regulates the size of the inner diameter. Adjustment of the knob allows operator selection between a high boost in a high altitude location and a low boost in a low altitude location having a higher source vacuum.

Systems and methods for providing opportunistic vehicle air brake system pressurization are disclosed. Vehicle air tanks used within an air brake system are pressurized during a time a battery charging status is satisfied. For example, such air tanks may be pressurized via an air compressor at a time during which the vehicle is electrically connected to a power source other than a battery of the vehicle. An example of such a power source may include an electrical charger, such as an electric vehicle charging station, or an electric generator during a regenerative braking event. The air tanks may also be pressurized by using a battery to energize the air compressor, based on the battery being charged above a predetermined threshold.

Systems and methods for providing opportunistic vehicle air brake system pressurization are disclosed. Vehicle air tanks used within an air brake system are pressurized during a time a battery charging status is satisfied. For example, such air tanks may be pressurized via an air compressor at a time during which the vehicle is electrically connected to a power source other than a battery of the vehicle. An example of such a power source may include an electrical charger, such as an electric vehicle charging station, or an electric generator during a regenerative braking event. The air tanks may also be pressurized by using a battery to energize the air compressor, based on the battery being charged above a predetermined threshold.

To provide a brake hydraulic pressure control apparatus capable of simplifying a measure against NVH and downsizing an outer shape of the apparatus. The brake hydraulic pressure control apparatus that controls a hydraulic pressure in each of plural systems of hydraulic circuits includes: a pressure supply unit that includes a motor and a pump element; and a hydraulic block that includes an oil channel connected to the pressure supply unit and control valves regulating the hydraulic pressure of each of the plural systems of the hydraulic circuits. The pressure supply unit includes: the motor including a stator and a rotor; a swash plate arranged to be tilted with respect to an axial direction of a rotation axis of the rotor; and the pump element having plural pump sections driven by rotation of the motor. At least a part of the pump element is arranged in the rotor.

To provide a brake hydraulic pressure control apparatus capable of simplifying a measure against NVH and downsizing an outer shape of the apparatus. The brake hydraulic pressure control apparatus that controls a hydraulic pressure in each of plural systems of hydraulic circuits includes: a pressure supply unit that includes a motor and a pump element; and a hydraulic block that includes an oil channel connected to the pressure supply unit and control valves regulating the hydraulic pressure of each of the plural systems of the hydraulic circuits. The pressure supply unit includes: the motor including a stator and a rotor; a swash plate arranged to be tilted with respect to an axial direction of a rotation axis of the rotor; and the pump element having plural pump sections driven by rotation of the motor. At least a part of the pump element is arranged in the rotor.

A commercial vehicle with a pneumatic system includes an air management system comprising an air compressor (11), a low-pressure circuit configured to store and supply compressed air within a low-pressure range, a high-pressure circuit configured to store and supply compressed air within a high-pressure range, a braking system presenting a usual braking operation with compressed air at pressures in the low-pressure range, and an emergency braking operation with compressed air at pressures in the high-pressure range, wherein the air management system is configured to supply the braking system: for the usual braking operation, with compressed air from the low pressure circuit, and for the emergency braking operation, with compressed air from the high-pressure circuit.

A system for generating air pressure in a hybrid vehicle, comprising an engine-driven air compressor (C1) configured to be selectively operated by an ICE engine, an electrically-driven air compressor (C2) configured to be operated by an electric motor, wherein said electric motor is supplied from the electric network, at least one air reservoir configured to store pressurized air and being configured to be connected directly or indirectly to both an outlet of the engine-driven air compressor (C1) and an outlet of the electrically-driven air compressor (C2), at least one electronic control unit (3, 3) configured to control at least the electrically-driven air compressor (C2) according at least to a selected drive mode of the vehicle, wherein the electrically-driven air compressor (C2) is downsized compared to the engine-driven compressor (C1), and corresponding control methods.

A system for generating air pressure in a hybrid vehicle, comprising an engine-driven air compressor (C1) configured to be selectively operated by an ICE engine, an electrically-driven air compressor (C2) configured to be operated by an electric motor, wherein said electric motor is supplied from the electric network, at least one air reservoir configured to store pressurized air and being configured to be connected directly or indirectly to both an outlet of the engine-driven air compressor (C1) and an outlet of the electrically-driven air compressor (C2), at least one electronic control unit (3, 3) configured to control at least the electrically-driven air compressor (C2) according at least to a selected drive mode of the vehicle, wherein the electrically-driven air compressor (C2) is downsized compared to the engine-driven compressor (C1), and corresponding control methods.

Bypass check valves, suitable for bypassing a Venturi gap, are disclosed and include a housing defining an internal cavity having a first seat and a second seat, and a seal member within the internal cavity translatable between a closed position against the first seat and an open position against the second seat. The second seat defines a support structure having a middle region of a predetermine height and a downstream side having a height that is shorter than the predetermined height of the middle region. The seal member is seatable against the second seat with a downstream portion thereof a further distance from the first seat than an upstream portion thereof.