Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1989-08-07
1991-09-24
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
303 20, B60T 816
Patent
active
050509373
ABSTRACT:
The specification relates to electronic controllers for braking systems, such as those used to actuate the brakes on towed vehicles in response to commands from the towing vehicle. The controller is responsive to an inertial sensor and/or manual control, and is completely independent of the towing vehicle brake light circuit. The controller includes a constant frequency variable pulse-width modulator which interacts with the towed vehicle braking system through a power MOSFET switch, which is preferably of N-channel configuration, that comprises the control element for the braking current supplied to the electromagnets that actuate the towed vehicle brakes. The controller advantageously includes a dual-slope integrator which provides a comparatively slow and gradually increasing control voltage to the variable pulse-width modulator, but discharges comparatively quickly to insure fast brake disengagement, in response to the inertial sensor or manual control. The controller preferably senses the voltage drop across the power MOSFET during conduction thereof to generate a control voltage input to the pulse-width modulator as well as a display circuit. The display circuit may include an LED bar graph which provides an indication of the magnitude of the current supplied to the brake electromagnets.
REFERENCES:
patent: 3738710 (1973-06-01), Pokrinchak et al.
patent: 3780832 (1973-12-01), Marshall
patent: 3908782 (1975-09-01), Lang et al.
patent: 3909075 (1975-09-01), Pittet, Jr. et al.
patent: 3953084 (1976-04-01), Pittet, Jr. et al.
patent: 3955652 (1976-05-01), Nilsson et al.
patent: 3967863 (1976-07-01), Tomecek et al.
patent: 3981542 (1976-09-01), Abrams et al.
patent: 3981544 (1976-09-01), Tomecek et al.
patent: 4030756 (1977-06-01), Eden
patent: 4050550 (1977-09-01), Grossner et al.
patent: 4084859 (1978-04-01), Bull et al.
patent: 4721344 (1988-01-01), Frait et al.
Graham Matthew C.
Tekonsha Engineering Company
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