Control for an electromagnetic brake for a multiple-ratio power transmission in a vehicle powertrain

A technology of electromagnetic brakes and power trains, applied in the combination of couplings and brakes, components of brakes, electric brakes/clutches, etc., which can solve problems such as adverse effects on the control system and reducing system reliability.

Inactive Publication Date: 2007-11-28
EATON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermal or electrical overloading of the control system may adversely affect the control system and reduce system reliability

Method used

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  • Control for an electromagnetic brake for a multiple-ratio power transmission in a vehicle powertrain
  • Control for an electromagnetic brake for a multiple-ratio power transmission in a vehicle powertrain
  • Control for an electromagnetic brake for a multiple-ratio power transmission in a vehicle powertrain

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Embodiment Construction

[0036] Figure 1 shows a known multi-speed heavy duty truck transmission capable of implementing the electromagnetic input shaft brake of the present invention. The transmission of FIG. 1 is one example of many transmissions to which the electromagnetic brake of the present invention can be applied. For example, a multi-speed transmission in an automotive driveline may use synchronizers to affect the simultaneous engagement of torque-transmitting gear elements. Other transmissions that may be used include automatic shift transmissions with pneumatic or hydraulic shift actuators.

[0037] The transmission of FIG. 1 includes a clutch bell 10 and a main transmission housing 12 mounted together by bolts 14 to form a transmission housing assembly. The bell housing 10 may be bolted at 16 to the engine flywheel housing of the internal combustion engine.

[0038] The transmission housing includes a forward bearing support wall 18 with a central bearing opening which receives and supp...

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PUM

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Abstract

The invention relates to the control of an electromagnetic brake used for a multi-gear power transmission of a vehicle transmission system. A control system (shown in drawing 8, drawing 9 and drawing 10) used for electromagnetic brakes (120, 122, 124) comprises an electromagnetic brake excitation coil (120) which is used for the multi-gear transmission (shown in drawing 1) in the vehicle transmission system and surrounds a power input shaft (124). The electromagnetic flux circuit (shown in drawing 7) of the excitation coil (120) is electrically insulated with the other elements of the power input shaft (24) and the transmission system, thus avoiding residual magnetization. The coil circuit is internally provided with a heat response circuit protector (154) which detects the temperature of a stator coil (120), thus avoiding the over-heat of the coil. The invention also provides an over-current protector (152) used for disconnecting the stator coil circuit when the current in the stator coil (120) exceeds the prearranged value.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of U.S. Application 11 / 143069, filed June 2, 2005, entitled "Electromagnetic Brake for a Multiple-Ratio Power Transmission in a Vehicle Powertrain," which was filed on January 20, 2004 Continuation-in-Part of US Application 10 / 760665, entitled "Clutch Brake," filed on . technical field [0003] The present invention relates to protection circuits and controllers for electromagnetic friction brakes of heavy-duty power transmissions (transmission mechanisms), which control the deceleration of torque input shafts for transmission during transmission ratio changes. Background technique [0004] The drive train of a heavy-duty vehicle, such as a truck or tractor-trailer, typically has an engine coupled to the power input shaft of a multi-speed gear transmission through a master clutch controlled by the vehicle operator. Operator-operated shift fork shafts and shift forks establish...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K49/00F16D65/27F16D67/06F16D65/22
Inventor M・J・霍恩布鲁克
Owner EATON CORP
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