摘要:
A method for controlling an industrial truck is disclosed, as well as a corresponding control system. The truck has at least one motor for driving a movable part of the truck and a sensor for measuring the actual motor speed and/or speed of the movable part in real time. The sensor transmits a real time speed signal representing the actual motor speed in real time to the controller, where the speed signal is compared with to predetermined data and/or to a speed control signal provided to the at least one motor. Based on the analysis, a secondary control data is generated for controlling the truck. The control method is usable in conjunction with a traction motor for the truck, whereby e.g. anti-spin and anti-brake lock functions could be implemented. The control method is also usable in conjunction with a motor/pump in a hydraulic system, whereby e.g. weight estimation and position determination functions could be implemented.
摘要:
The invention relates to a method for operating the drive device of a vehicle. The drive device of a motor vehicle that comprises an engine and a continuously variable automatic transmission for driving the driven wheels of a vehicle is usually operated in a normal mode in normal driving operation and in a brake-engaging mode if the slip acting upon at least one of the wheels exceeds a determined value. During the brake-engaging mode the transmission ratios may vary widely or the vehicle may run at a low engine torque but high drive speed, which is often disagreeable for the driver. The aim of the invention is to provide a method with which the driving comfort is improved. To this end, a normal transmission ratio is given in the normal mode as the desired value of the transmission ratio and the transmission ratio is reduced to an actual transmission ratio in the brake-engaging mode. The difference between the normal transmission ratio and the actual transmission ratio is detected as the differential ratio and a maximum desired drive speed is modified depending on the differential ratio.
摘要:
An industrial fork lift truck comprising an electric motor (3), a motor controller (2) for controlling the electric motor (3) and a truck computer (1) for controlling the motor controller (2), said truck computer (1) comprising a detection system (5) for detecting spinning and/or locking of the drive wheel of the truck characterized in that the detection system (5) is arranged to receive a signal corresponding to the momentary torque current of the motor (3); and further comprising: -a calculation unit (12) for calculating the theoretical torque current of the motor (3); -a comparison unit (13) for comparing the theoretical torque current of the motor (3) and the momentary torque current of the motor (3), wherein the truck computer is arranged to reduce the acceleration or the deceleration of the truck if there is a difference between the theoretical torque current of the motor (3) and the momentary torque current of the motor (3).
摘要:
In a driving condition control system, a sensing unit senses a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A determining unit compares the first and second physical quantities of the rotations of the first and second rotational axle assemblies and determines whether a driving condition of the vehicle is unstable according to the compared result. As a result, the unstable condition of the vehicle can be rapidly detected without detecting a yaw moment of the vehicle.
摘要:
A controller is provided for a permanent magnet field motor (10) including two rotors (21, 22) concentrically provided around a rotating shaft (12) and a phase changing device (13) for changing an angle of relative displacement in a circumferential direction between two rotors (21, 22) to serve as a power source for driving driven wheels (135) of an all-wheel drive vehicle having two main driving wheels (A, B) and at least two driven wheels (135), the controller including a drive control portion (131) to control driving of the motor (10) according to a drive mode of the all-wheel drive vehicle; and a phase instruction portion (131) to issue an instruction, when the drive mode of the all-wheel drive vehicle is a main-driving-wheel drive mode, to set the angle of relative displacement at an angle at which a magnetic flux generated at each of the two rotors (21, 22) is weakened, as compared with that generated at each of the two rotors (21, 22) in an all-wheel drive mode.
摘要:
The invention relates to a method for detecting the status of a clutch in the drive train of a motor vehicle, wherein the engine speed nMot and the speed Vaxle,M are detected, and a transmission ratio iges is generated as the quotient of the engine speed nMot and the speed Vaxle,M. Furthermore, a reference value igesRef is determined and is equated with the transmission ratio iges from a first time step. Finally, in a subsequent time step, the difference between the current transmission ratio iges and the reference value igesRef is generated, wherein a disengaged status of the clutch is detected when the difference exceeds a limit value Δiges.
摘要:
The invention relates to a method for controlling the traction slip of the driven wheels of a vehicle, according to which a set parameter for a drive engine (12) of the vehicle is calculated on the basis of the detected value of instantaneous wheel speed and a calculated value of set wheel velocity. According to the invention, the set parameter is formed by an upper limit value for the rotational speed of the drive engine (12).
摘要:
The invention relates to an anti spinning device for a powered vehicle, which vehicle comprises at least one driveline, the driveline comprising a power source (17) and at least one rotatable element, which power source (17) is connected to and arranged to transmit power to said at least one rotatable element. The anti spinning device (21) comprises means for detecting the fulfilment of a preset condition and means for interrupting the power transmission to the individual rotatable element when the preset condition is fulfilled. The invention also relates to a method for controlling an anti spinning device (21) , and to a vehicle and a work vehicle comprising such an anti spinning device (21) .