摘要:
The control system comprises detectors or estimators capable of supplying electrical signals or data indicative of the values of predetermined state variables including the angular velocity of the crankshaft of the engine, the difference between this angular velocity and the angular velocity of the primary shaft of the gearbox, and the torque delivered by the engine crankshaft and the torque transmitted by the friction clutch; calculating devices capable of supplying signals indicating the errors between the values of the state variables and respective reference values; filter devices capable of incrementing, within a predetermined frequency band, the relative weight selectively of the error of angular velocity of the crankshaft of the engine, and of the error of the abovementioned difference of angular velocity; processing devices capable of generating, in accordance with predetermined transfer functions, output signals or data indicating a torque partial value or contribution to be delivered by the engine and a torque partial value or contribution to be transmitted to the primary shaft of the gearbox by the friction clutch; and an adder capable of adding the torque partial values or contributions to corresponding other torque partial values or contributions, to be delivered or transmitted as relevant, determined by predetermined methods, in order to supply in the total output signals or data indicating the torque to be generated in the engine crankshaft and signals or data indicating the torque to be transmitted by the friction clutch.
摘要:
A method of estimating the slope of a road surface on which is positioned a motor vehicle. The slope is determined by measuring the velocity and longitudinal acceleration of the vehicle by means of a mathematical model based on the relation Ax={dot over (ν)}+g sin α, where Ax is longitudinal acceleration, {dot over (ν)} indicates the component of longitudinal acceleration of the vehicle along the road surface, g is the gravitational acceleration, and α represents the angle of inclination of the road surface.
摘要:
The control system comprises detectors or estimators capable of supplying electrical signals or data indicative of the values of predetermined state variables including the angular velocity of the crankshaft of the engine, the difference between this angular velocity and the angular velocity of the primary shaft of the gearbox, and the torque delivered by the engine crankshaft and the torque transmitted by the friction clutch; calculating devices capable of supplying signals indicating the errors between the values of the state variables and respective reference values; filter devices capable of incrementing, within a predetermined frequency band, the relative weight selectively of the error of angular velocity of the crankshaft of the engine, and of the error of the abovementioned difference of angular velocity; processing devices capable of generating, in accordance with predetermined transfer functions, output signals or data indicating a torque partial value or contribution to be delivered by the engine and a torque partial value or contribution to be transmitted to the primary shaft of the gearbox by the friction clutch; and an adder capable of adding the torque partial values or contributions to corresponding other torque partial values or contributions, to be delivered or transmitted as relevant, determined by predetermined methods, in order to supply in the total output signals or data indicating the torque to be generated in the engine crankshaft and signals or data indicating the torque to be transmitted by the friction clutch.
摘要:
A method of estimating the slope of a road surface on which is positioned a motor vehicle provided with a velocity sensor for measuring the modulus of the velocity of the vehicle and with an accelerometer for measuring the acceleration in the longitudinal direction of the vehicle comprises the following operations: a) providing a signal indicating the measurement of the velocity of the vehicle (V1) by means of the velocity sensor; b) providing a signal indicating the measurement of the acceleration in the longitudinal direction of the vehicle (AxVehFilV) by means of the accelerometer; c) processing the velocity measurement signal (V1) and the acceleration measurement signal (AxVehFilV) by means of a mathematical model based on the relation Ax={dot over (ν)}+g sin α, where Ax represents the measurement of acceleration in the longitudinal direction of the vehicle, {dot over (ν)} indicates the component of longitudinal acceleration of the vehicle along the road surface, g is the gravitational acceleration, and α represents the angle of inclination of the road surface, in such a way as to determine an estimated value of the slope of the road surface (StimaPend); d) processing the velocity measurement signal (V1), the acceleration measurement signal (AxVehFilV) and the estimated value of the slope (StimaPend) in such a way as to determine the sign of the velocity of the vehicle (Segno); and e) repeating operations a) to d) recursively according to a predetermined rule, in which the sign of the velocity (Segno) determined in operation d) of a specific recursive step is used as an additional input for operation c) of the successive recursive step to correct the estimated value of the slope (StimaPend).
摘要:
The system includes a memory in which curves are stored which define the conditions for each gear change, corresponding to at least two reference styles of driving, sensors for operating parameters of the motor vehicle, and second processing devices set up to estimate the value of a first index which identifies the kind of driving of the motor vehicle and, respectively, the value of a second index which defines the manner or style of driving of the driver, and a processing and control unit. This unit is set up to perform a learning procedure in which it acquires and memorizes the value of the second index corresponding to the manner or style of driving of the driver during a test drive with manual control of the gears, and generates and memorizes maps of modified curves defining the conditions for the gear changes according to a personalized style of driving from among the said reference methods, and an automatic control procedure in which it controls actuators in order automatically to effect the gear changes based on the modified curves generated during the learning procedure.
摘要:
What is described is a control system for controlling the driving-away maneuver in a motor vehicle provided with a gearbox comprising a primary input shaft which can be coupled to a drive shaft of a propulsion system of the vehicle by means of a servo-assisted friction clutch, wherein a control unit receives at its input signals indicating a command imparted by the driver of the motor vehicle by operating the accelerator pedal, and generates—on the basis of a mathematical reference model—reference torque request signals indicating the reference torques requested from the drive shaft and from the friction clutch during the driving-away manoeuvre, and also generates—by comparison between signals indicating the estimated angular velocities of the drive shaft and of the primary gear shaft, and detected signals indicating the actual angular velocities of the drive shaft and of the primary gear shaft—corresponding corrective contributions, in such a way as to construct command signals for controlling torque actuator devices of the propulsion system and of the friction clutch, for controlling the driving-away manoeuvre in the motor vehicle.
摘要:
What is described is a control system for controlling the driving-away manoeuvre in a motor vehicle provided with a gearbox comprising a primary input shaft which can be coupled to a drive shaft of a propulsion system of the vehicle by means of a servo-assisted friction clutch. A control unit receives at its input signals indicating a command imparted by the driver of the motor vehicle by operating the accelerator pedal, and generates—on the basis of a mathematical reference model—reference torque request signals indicating the reference torques requested from the drive shaft and from the friction clutch during the driving-away manoeuvre, and also generates—by comparison between signals indicating the estimated angular velocities of the drive shaft and of the primary gear shaft, and detected signals indicating the actual angular velocities of the drive shaft and of the primary gear shaft—corresponding corrective contributions, in such a way as to construct command signals for controlling torque actuator devices of the propulsion system and of the friction clutch, for controlling the driving-away manoeuvre in the motor vehicle.
摘要:
What is described is a control system for controlling the coupling between a driveshaft of a motor vehicle propulsion system and a primary input shaft of a gearbox by means of a servo-assisted friction clutch. A control unit receives at its input signals indicating a command imparted by the driver of the motor vehicle by operating the accelerator pedal in a driving-away or gear-changing manoeuvre, and generates—on the basis of a mathematical reference model—reference torque request signals indicating the reference torques requested from the driveshaft and from the friction clutch, the said request signals or data varying in time in such a way as to cause synchronization between the angular velocities of the driveshaft and of the primary gear shaft to be reached at the same moment as the difference between the angular accelerations of the said shafts becomes zero.
摘要:
What is described is a control system for controlling the coupling between a driveshaft of a motor vehicle propulsion system and a primary input shaft of a gearbox by means of a servo-assisted friction clutch.A control unit receives at its input signals indicating a command imparted by the driver of the motor vehicle by operating the accelerator pedal in a driving-away or gear-changing manoeuvre, and generates—on the basis of a mathematical reference model—reference torque request signals indicating the reference torques requested from the driveshaft and from the friction clutch, the said request signals or data varying in time in such a way as to cause synchronization between the angular velocities of the driveshaft and of the primary gear shaft to be reached at the same moment as the difference between the angular accelerations of the said shafts becomes zero.
摘要:
A system for controlling a servo-controlled gearbox (C), configured so as to use gear-shifting strategies similar to those used by a human driver so as to improve the driving sensation experienced by the driver. The control system uses a plurality of sensors (SENS) disposed in the vehicle for detecting the various operative conditions and a system of rules (a rule-based system) for implementing the strategies provided for.