摘要:
A grade and acceleration sensor (10) having a weight (26,66), a first sensor (46,80) for measuring a first parameter of the weight due at least to the force of gravity to generate a first signal, a second sensor (50,88) for measuring a second parameter of the weight due to both the force of gravity and the acceleration of the vehicle (12,14) on which the sensor (10) is mounted to generate a second signal, a grade angle generator (48,84) generating the grade angle ϑ in response to the first and second signal, and an acceleration generation (52,96) generating a signal having a value corresponding to the acceleration of the vehicle in response to the first and second signals. In a first embodiment, the weight is a bob (26) of a pendulum (20), the first parameter is a displacement angle of the bob (26) due to acceleration and gravity and the second parameter is the force on the arm (30) of the bob (26) due to gravity and acceleration. In a second embodiment, the first parameter is force generated by a weight (66) due to gravity along a first axis and the second parameter is the force generated by the weight (66) due to acceleration and gravity along a second axis normal to the first axis.
摘要:
A viscous fluid coupling employing an electro magnet (100, 32) which receives electrical pulses in response to a signal received from a heat sensing device to operate a valve arm (90) to seal and unseal an inlet passage (86) fluidly communicating an operating chamber with a storage chamber. The operating chamber is defined by a clutch member (44) and a housing member (58) that are rotatably disposed relative to one another. The storage chamber is defined by a cover plate (74) and a valve plate (76) and is in fluid communication with the operating chamber via a discharge passage and the inlet passage (86). A pump displaces fluid from the operating chamber through the discharge passage into the storage chamber. The inlet passage (86) when unsealed directs fluid from the storage chamber to the operating chamber. The valve arm (90) is moved in one direction in response to inducing a magnetic field and in the other direction by a spring when the magnetic field is not induced. Fluid is disposed within the coupling and, when located in the operating chamber, transmits torque from the clutch to the housing. The magnetic field is induced and terminated by an electrical control (108) at a controlled duty ratio dependent upon a signal from the heat sensing device to control the amount of fluid entering the operating chamber and thus control the speed of the housing (58).
摘要:
A truck tractor and trailer electrical communication system having one electronic control unit (8) located in tractor and another electronic control unit located in at least one trailer both respectively controlling the state of a plurality of switching devices (10A,10B,12A,12B,13A,13B,16) to establish the appropriate electrical connection into and out of a standard seven pin tractor/trailer electrical connector (22,24) where high speed data communication links are used for control and diagnostics.
摘要:
A vehicular traction control system (10) is provided wherein the foundation brakes (40, 42) associated with an excessively spinning wheel (28, 30) are applied, the braking torque required to terminate the excessive spinning is determined, the brakes are released and if the spin-out reoccurs, the brakes are rapidly reapplied with a braking torque just insufficient to have previously caused the excessively spinning wheel to be substantially stopped.
摘要:
Sensors (170, 172) for sensing articulation angle (AA) and/or a time derivative thereof (dAA/dt, d²AA/dt²) for a trailer anti-swing control system are provided. In the preferred embodiments, at least the active transducers of the sensors are mounted to the tractor (12) subvehicle of the articulated vehicle system (10).
摘要:
A dual speed sensor pickup assembly (140) for sensing the rotational velocity of two independently rotatable, closely axially spaced exciter rotors (116 and 118) is provided. The pickup assembly includes two speed sensor assemblies (136 and 138) each including a pole piece (152,160) having a longitudinal axis (152a, 160a) with the longitudinal axes skewed relative to one another but radial relative to the common axes of rotation (24) of the exciter rotors. Each speed sensor includes a permanent magnet (154,162) disposed between an end of the pole piece (152,160) and having a face divided into first and second surfaces (154a,154b and 162a,162b) by a slot (154c,162c) therein. In one embodiment a primary coil (156,164) and a secondary or anti-cross talk coil (158,166) surrounds the pole piece of each sensor (136,138), and each secondary coil is conductively connected to the primary coil of the other sensor. In another embodiment, an electronic circuit (176) is provided for producing anti-cross talk signals which are added to the speed sensor signals.