To accomplish these results, the controls should deliver equal and accurate actuation to all brakes at all times, be designed to minimize the possibility of becoming inoperative on account of dirt and rust, require no servicing, be noiseless and of good appearance, and remain unaffected by climatic changes.
Shoe design should allow very liberal limits and tolerances in wheel, axle and drum assemblies, without causing erratic brake-action or noises. The brake hook-up should follow the simplest line and use the least number of connecting links. Particular attention should be given to avoiding friction in the linkage and to keeping the linkage deflection small.
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San Surya. Mohsin Engr. Amit Bakle. Dev Jha. Chockalingam Athilingam. C S Kumar. Vineet Yadav. Joshua Bailey. Sudeep Kumar. A review of the above-mentioned U. Patent 5,, will provide the reader with a more complete determination of the operation of the hybrid powertrain Also, the one-way brake member is effective during normal operation of the hybrid powertrain During operation after vehicle launch, the energization of clutch 60 will permit electrical power to be effectively combined with engine power to drive the sprocket A further driving mode is provided when both clutches 60 and 58 are engaged to establish a one-to-one drive connection in the planetary gear set 14, such that both engine power and electrical power are delivered to the sprocket The primary difference between the prior art and the present invention is the use of self-energizing disc brake and self-energizing cone brake to permit the motor-generator 12 to provide starting power to the engine.
When the engine is unpowered and the motor-generator 12 is driven such that the rotor 84 will rotate in the direction necessary to provide engine rotation for starting, the balls will be urged into abutment with the member such that the cone brake and the disc brake will provide a frictional drag between their respective hubs and The respective drive between these hubs will cause rotation of the members and will result in the balls being propelled in the cam housing along ramps, not shown, to further enforce engagement of the cone brake and disc brake Thus, the carrier 96 and carrier 50 will become the action members since both will be held stationary by their respective brakes and When viewed from left to right along the shaft , it is presumed the engine will be turned clockwise for starting and during normal operation.
To accomplish this, the rotor 84 is also rotated clockwise. Clockwise rotation of the rotor 84 will result in the clockwise rotation of sun gear 92 which will enforce counterclockwise rotation of the ring gear due to the carrier 96 being held stationary by the disc brake The ring gear , and therefore sun gear 52, in rotating counterclockwise will enforce clockwise rotation of the ring gear 44 since the carrier 50 is maintained stationary by the disc brake It should be appreciated that the torque imposed on the carrier 96 is in a clockwise direction and the torque imposed on the carrier 50 is in a counterclockwise direction.
Thus, the frictional force of the disc brake is opposite to the frictional force of the cone brake , such that the self-energizing assembly represented by the ball , springs and cam housing is only necessary to react against the difference in the torque levels at these two brakes.
This greatly reduces the force to ground necessary to provide the self-energizing operation of the brakes and When the engine has started and is providing power to the transmission, the pump 36 will be driven via the shaft 34, such that hydraulic control pressure is available at the control The control 38 is manipulated to control fluid pressure to the passage and therefore chamber The fluid pressure in this passage will enforce axial movement of the piston which will result in leftward movement of the member and therefore disengagement of the cone brake and the disc brake It should also be appreciated that the force necessary to release the brakes is equal to the difference in the torque being transmitted thereby.
Thus, the disengagement pressure of the brakes and is not excessively high. The fluid pressure in passage is supplied by the control 38 and can be generated as a result of an engine speed signal, an engine torque availability signal, a centrifugal signal of any of the rotating components within the transmission, or simply as a result of the pump 36 being rotated sufficiently fast to provide fluid pressure to the system. The fluid pressure in passages 70 and 82, when enforce engagement of the clutches 58 and 60, respectively, is also supplied by a conventional control philosophy.
The control of the pressure levels to be supplied can be established by electrical devices, such as pulse width modulated solenoids or linear pressure actuators, or by more conventional spring and valve arrangements. These methods of pressure control and distribution are well known, such that it is believed that those skilled in the art will readily recognize the various methods which can be employed to supplied the fluid pressure required.
Obviously, many modifications and variations of the present invention are possible in light of the above teaching. It is therefore to be understood, that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described. Electro-mechanical hybrid powertrain comprising: an input means for supplying power;. Electro-mechanical hybrid powertrain with self-engaging brakes for starting the engine. USA en. EPB1 en. DET2 en. Vehicle power transmitting system having devices for electrically and mechanically disconnecting power source and vehicle drive wheel upon selection of neutral state.
Drive train, especially for motor vehicle, has at least one gearbox component that implements transmission function mounted radially within rotor. DEC1 en. USB2 en. Hybrid vehicle, has controllable brake module arranged between output of coupling module and input of transmission, where input is connected to output and control is provided for controlling brake module.
USB1 en. Drive mechanism for vehicles with two motors - has differential gearing with two planet sets, three sun wheels and control system.
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