Abstract: A pneumatic jacking assembly for lifting a vehicle includes an air bag that is selectively inflated. A first plate is coupled to the air bag. The first plate is positioned on a support surface such that the first plate is positioned beneath a vehicle. A second plate is coupled to the air bag and the second plate abuts the vehicle when the air bag is inflated. In this way the air bag lifts the vehicle for servicing the vehicle. A pump is coupled to the first plate and the pump is in fluid communication with an interior of the air bag. The pump inflates the air bag when the pump is turned on. The second plate is urged away from the first plate when the air bag is inflated to lift the vehicle.

Abstract: An exhaust brake may include an exhaust pipe configured to include an exhaust upstream and an exhaust downstream, a butterfly configured to be mounted between the exhaust upstream and the exhaust downstream in the exhaust pipe, a bypass pipe configured to include a bypass upstream starting between the exhaust upstream and the butterfly and a bypass downstream ending between the butterfly and the exhaust downstream, and a check valve configured to be mounted between the bypass upstream and the bypass downstream. The piston head of a piston of the check valve may be disposed at the bypass downstream and a direction in which the piston head moves to the bypass downstream is a direction in which the check valve is opened.

Abstract: The invention concerns a compression device fitted with a drive unit; with a compressor driven by the drive unit, which compresses a gaseous compression medium; with a cooling device, comprising at least one fan wheel, which cools the compression medium; the fan wheel is in drive connection with the drive unit or a second drive unit additionally provided, in order to be thereby driven in rotation. The invention is characterized in that a hydrodynamic clutch is arranged in the drive connection, via which the fan wheel is driven hydrodynamically, and the drive power transmission of the hydrodynamic clutch can be modified in operation by pressurizing the hydrodynamic clutch with a control pressure medium, wherein the compression medium is the control pressure medium at the same time.

Abstract: An exhaust brake for an internal combustion engine is disclosed. The exhaust brake includes a main valve and a bypass valve for restricting the flow of exhaust gas. The main valve may be selectively closed, while the bypass valve is biased into a closed position with a selective biasing force. Closing the main valve may cause exhaust back pressure to build against the bypass valve until the biasing force is overcome. When the biasing force is surpassed by the exhaust back pressure, the bypass valve opens to relieve the back pressure. The bypass valve closes when back pressure falls below the biasing force. The biasing force may be varied to operate the exhaust brake at a maximum back pressure for a given engine speed and/or engine condition. A method of operating the exhaust brake is also disclosed.

Abstract: A system and method for controlling a vacuum operated exhaust brake. A vehicle may be provided with service brake assistance and an exhaust brake, each of which may be driven by a common vacuum source. In the event the available vacuum is likely to be insufficient to meet the demand of the service brake assistance system, the exhaust brake may be selectively isolated from the vacuum source. Exhaust brake isolation may be responsive to a sensed vacuum parameter, such as the magnitude of the vacuum and/or the rate of change of the vacuum. Vacuum communication between the exhaust brake and the vacuum source may be reestablished responsive to the sensed vacuum parameter.

Abstract: An exhaust brake for an internal combustion engine is disclosed. The internal surfaces of the exhaust brake are aerodynamically shaped and sized to reduce the incidence of turbulent flow through the exhaust brake. The shape of the internal passage through the brake housing may be dictated by the requirement of maintaining as close to a laminar flow through the passage as possible when the brake valve is open. The ideal brake housings of the internal passage may be determined for exhaust brakes of various shapes and sizes. The ideal shapes may be typified as having non-uniform wall thicknesses. The ideal shapes of the internal brake surfaces, including that of the valve, may also be typified by the elimination of square edges (which trigger turbulence). Ideal flow through the exhaust brake may also be obtained by the reduction of bulk in the exhaust flow (minimization of the profile of the valve in the flow when the valve is open).

Abstract: A drive unit for vehicles with an engine and a gearbox, and with a hydrodynamic retarder. The retarder is in constant drive connection with the engine. The unit includes a coolant circuit whose coolant is at the same time the working medium of the retarder, and the retarder can be utilized as a coolant pump. The retarder is arranged before the gearbox, and the retarder can be united with an engine brake to an overall brake unit (OBU). The overall brake unit is configured such that the retarder can in a braking operation engage sooner than the engine brake.

Abstract: An exhaust brake incorporates a slide valve with a decreasing returning or opening effort without also having an increased working or closing effort of its valve elements incorporated therein. The brake system includes a first valve piston connected to a closing slide valve and adapted to move in reciprocating motion inside a cylinder under an operating pressure supplied thereto, and in addition, a second valve piston adapted to be driven in rectilinear motion under the operating pressure in the cylinder so as to work upon a resilient member to be deformed resiliently. When opening the slide valve, a restoring effort of the resilient member is relayed effectively to the first valve piston through a transmitting member to work in assistance with the returning motion of the valve piston.

Abstract: A sliding exhaust gas brake connected in the exhaust pipe of an engine in a motor vehicle. It includes a housing having a portion defining an exhaust gas passage and connected to the exhaust pipe at both ends thereof and a portion connected to the exhaust gas passage substantially at right angles thereto and defining a chamber in which a valve member is slidably disposed. A valve actuator has one end connected to a housing wall defining the end of the chamber. The actuator includes a piston and a piston rod extending into the housing through the housing wall and having one end on which the valve member is supported. A partition is provided in the housing for dividing the chamber into a first portion in which the valve member is slidably disposed and a second portion into which the piston rod extends. The partition has an opening aligned with the exhaust gas passage. The opening has an edge defining a valve seat on which the valve member rests when closing the exhaust gas passage.

Abstract: An exhaust brake apparatus of sliding type is provided including a main valve which is adapted to open or close an exhaust gas passage. The main valve is formed with a vent hole which provides a communication thereacross through the exhaust gas passage. A sub-valve which operates to open or close the vent hole is connected through an operating rod to an actuator. When the exhaust gas passage is to be closed, the sub-valve is caused to close the vent hole before the main valve is operated while when the exhaust gas passage is to be opened, the sub-valve is moved out of its position closing the vent hole before the main valve is operated. In accordance with the invention, the main valve is formed with a plurality of vent holes, which are individually opened or closed by a plurality of sub-valves mounted on the operating rod. In this manner, an increased area of flow path through the vent holes is achieved without increasing the stroke of the operating rod or increasing the size of the sub-valves.