A hydraulic cylinder retarder includes a hydraulic cylinder mechanism, a hydraulic oil conveying mechanism and a hydraulic oil valve mechanism. A piston component of the hydraulic cylinder mechanism is connected to a transmission device. Resistance to the piston movement of the hydraulic cylinder mechanism is generated by the hydraulic oil conveying mechanism and the hydraulic oil valve mechanism, so as to reduce the operation speed of the transmission device.

The present invention discloses a resistance force control structure of driven pulley device, which is pivot mounted on a wheel of a driven pulley device, and primarily uses damping oil or a magnetic force to achieve a resistance effect. The magnetic force portion can also be added to a gear structure to present another configuration of a resistance force control structure to achieve change in magnetic force to increase the stabilizing effect of a wheeled frame. Moreover, an adjustable mechanism enables the user to control changes in the height of the damping oil level or magnetic force strength to control the rotational speed of a wheel.

A method of maintaining a temperature of an aftertreatment system of a vehicle, the method including: operating, by a controller, a retarder reducing driving force of a propeller shaft of the vehicle in response to a retarder operation request signal; operating, by the controller, a jake brake device which discharges a fuel-air mixture compressed in an explosion stroke of the engine to an exhaust pipe and decreases revolutions per minute (RPM) of the engine or an exhaust brake device which blocks a discharge of the exhaust gas of the engine to a rear end of the exhaust pipe and decreases the RPM of the engine, in order to remove the output error value; and controlling, by the controller, the engine so that an amount of exhaust gas introduced into the aftertreatment system is decreased.

A secondary brake for commercial vehicles using Magnetorheological (MR) fluid may include a rotor coupled to a transmission output shaft to be rotated together, a stator configured to be disposed between the rotor and a body of a transmission and having a cavity into which the MR fluid is filled and a portion of the rotor is received, and a stator coil provided in a portion of the stator and applying a magnetic field to the MR fluid so that braking torque is generated due to a shear resistance characteristic of the MR fluid.

A secondary brake for commercial vehicles using Magnetorheological (MR) fluid may include a rotor coupled to a transmission output shaft to be rotated together, a stator configured to be disposed between the rotor and a body of a transmission and having a cavity into which the MR fluid is filled and a portion of the rotor is received, and a stator coil provided in a portion of the stator and applying a magnetic field to the MR fluid so that braking torque is generated due to a shear resistance characteristic of the MR fluid.

The invention relates to the cooling system of an internal combustion engine (10) which comprises a combustion engine (12) having at least two cylinder banks (14, 16) and a number of exhaust gas exchangers (18, 20) identical to the number of cylinder banks, as well as a retarder connection, wherein the cooling system can be flown through by a fluid serving as coolant in a preferred flow direction and comprises a cooling system trunk section (30) and a number of cooling system branch sections identical to the number of the cylinder banks (14, 16) of the combustion engine (12), said cooling system branch sections comprising each a cylinder bank branch section (22, 24), an exhaust gas exchanger branch section (36, 38) and a combining branch section (44, 46). The invention further relates to an internal combustion engine (10) corresponding thereto.

The invention relates to the cooling system of an internal combustion engine (10) which comprises a combustion engine (12) having at least two cylinder banks (14, 16) and a number of exhaust gas exchangers (18, 20) identical to the number of cylinder banks, as well as a retarder connection, wherein the cooling system can be flown through by a fluid serving as coolant in a preferred flow direction and comprises a cooling system trunk section (30) and a number of cooling system branch sections identical to the number of the cylinder banks (14, 16) of the combustion engine (12), said cooling system branch sections comprising each a cylinder bank branch section (22, 24), an exhaust gas exchanger branch section (36, 38) and a combining branch section (44, 46). The invention further relates to an internal combustion engine (10) corresponding thereto.

A working medium circuit for a hydrodynamic machine. The working medium circuit includes a working medium container, an inflow line, an emptying line, and a heat exchanger. The working medium can be moved out of the working medium container into the working chamber for a first operating state, in particular the braking mode, and the working medium can be moved out of the working chamber back into the working medium container for a second operating state, in particular the non-braking mode. For aerating and ventilating, the working chamber is connected at least indirectly via a ventilating line to a chamber which has a ventilating device with respect to the surroundings and in which working medium can collect.

A working medium circuit for a hydrodynamic machine. The working medium circuit includes a working medium container, an inflow line, an emptying line, and a heat exchanger. The working medium can be moved out of the working medium container into the working chamber for a first operating state, in particular the braking mode, and the working medium can be moved out of the working chamber back into the working medium container for a second operating state, in particular the non-braking mode. For aerating and ventilating, the working chamber is connected at least indirectly via a ventilating line to a chamber which has a ventilating device with respect to the surroundings and in which working medium can collect.

There is provided a hydrodynamic retarder including a bladed rotor and a bladed stator jointly forming a working chamber to be filled with working medium and discharged therefrom, a working medium container receiving working medium, and a control pressure application system pressurizing the working medium with a control pressure medium to displace the working medium from the working medium container into the working chamber to set a desired braking torque. A centrifugal separator separating the working medium from the control pressure medium, the centrifugal separator is connected in a flow-conductive manner to an outlet of the working medium container for the control pressure medium to be pressurized with the control pressure medium, the centrifugal separator is driven by the pressure of the control pressure medium, and the working medium container is assembled from at least two shells, where the first and/or the second shell encloses the centrifugal separator.