摘要:
Method and cruise control system for controlling a vehicle cruise control comprising the steps of -driving said vehicle with said cruise control active and set to maintain a vehicle set target Speed (V cc set target speed ); -registering current vehicle condition, which comprises at least a current vehicle position (A), a currently engaged gear ratio, available gear ratios, current vehicle speed, available maximum propulsion torque and road topography of coming travelling road comprising a next coming uphill slope; - based on said current vehicle condition predicting a downshift at a coming vehicle position (C) in said coming uphill slope due to vehicle speed decrease and selecting at least one activity which results in that said downshift can be postponed or avoided; -controlling said cruise control according to said selected activity in order to postpone or avoid, for example a downshift from a direct gear and thereby saving fuel.
摘要:
The present invention relates to a motor vehicle with a clutch (3) and an automated transmission (9) between the engine and the drive wheels of the vehicle. The vehicle has control means (45, 48) depending on a set position of an electronic gear selector (46). The control means, with the gear selector in its position for automatic shifting, selects a gear for starting off or under way, which is determined by the gear selection strategy stored in the control means as a function of various parameters fed into the control means. The invention is characterized in that in that the control means, which are adapted for communication with a communication terminal (500) are disposed, prior to starting off or under way, to receive one or more setting schedules for control parameter weighting from the communication terminal (500). Further, the communications terminal continuously performs computer simulations of the future driving of the vehicle according to a stored model, in order to select a shifting schedule which will be optimal in view of said setting schedule.
摘要:
Motor-driven cargo vehicle with an automated clutch (33) and gearbox (39) between the engine (31) and the vehicle drive wheels. The gearbox and the clutch are controlled by an electronic control unit (19) depending on a set position of a manual gear selector (53). The control unit is arranged, when starting off, with the gear selector in the position for automatic shifting, to select the highest gear speed which makes starting off of the vehicle possible with the available torque at engine idle speed, introducing an amount of energy from the engine to the clutch which at most amounts to a predetermined maximum value.
摘要:
Vehicle comprising an internal combustion engine and a drivetrain coupled to the said internal combustion engine, together with a control unit for automatic gear selection as a function of the current rotational speed of an input shaft to the gearbox, in which the said control unit is designed to assume a first operating mode having a first working speed range with a first lower limit for downshifting to a gear with a higher transmission ratio, and method of automatic gear selection in a gearbox forming part of a vehicle.
摘要:
Various signals characterizing the real driving situation of a motor vehicle, especially the gradient of the road, are evaluated and control signals characterizing the real driving situation of a vehicle are produced in order to select the shift characteristics. A shift to a corresponding family of characteristics occurs according to the control signals. The gears are then automatically shifted according to the family of characteristics thus selected. The gradient of the road and vehicle load are characterized by separate control signals.
摘要:
In a kick-down switching speed optimization method for a motor vehicle with an automatic transmission, the kick-down upshift point is determined depending on the actual load conditions and pavement gradients.
摘要:
In a process for controlling an automatic gearbox (3), at least one of the weighted values: selector lever activity, engine excess torque, curve radius and brake activity determine a first parameter (K1), the driving activity. Besides the first parameter (K1), a second parameter (K2) determines the selection of a shift characteristic field (31) among a plurality of shift characteristic fields. The second parameter (K2) is determined according to driving state: city traffic (27), trailing (28), and mountain driving (29).
摘要:
A controller (102) and a method to operate a Continuously Variable Transmission (CVT) of a vehicle on a gradient is provided. The controller (102) is adapted to determine a gradient of a driving surface (402) based on signals received from at least one of a sensor (110) and a combination of said engine speed, a vehicle speed and said throttle position. The controller (102) calculates a target gear ratio corresponding to the gradient. The controller (102) determine an actual gear ratio based on the engine speed and the vehicle speed. The controller (102) then computes an offset gear ratio between the desired gear ratio and the actual gear ratio. The controller (102) calculates a target gear ratio based on the offset gear ratio and the base gear ratio. The controller (102) controls the variator (118) with the electrical actuator (116) corresponding to the offset gear ratio.