The invention concerns a drive system, especially for a motor vehicle, with a drive assembly, especially an internal combustion engine; an electric machine that is directly coupled or can be coupled to the drive shaft of the drive assembly, being designed such that it can start the drive assembly by merging in from standstill; and an automatic start-stop control of the drive assembly. The invention is also addressed to a method for operating such a drive system.

Drive system, especially for a motor vehicle, and method of operating same

The invention concerns a starter/generator for an internal combustion engine ( 1 ), especially that of a motor vehicle, with an electric rotary-field machine ( 4 ), which exercises the starter and generator function; and at least one invertor ( 17 ) for generating the voltages and/or currents of variable frequency, amplitude and/or phase required for the magnetic fields of the electric machine ( 4 ); wherein the electric machine ( 4 ) starts the internal combustion engine ( 1 ) by merging in from standstill.

Starter/generator for an internal combustion engine, especially an engine of a motor vehicle

A comprehensive dynamic model of a four motorized wheels electric vehicle has been developed and different types of motor control laws were addressed. The first part of this study deals with the full description of the model scope in which the structure of the model, including the sub-models, has been expressed. Subsequently, the sub-models including the tire sub-model, the body motion, and the motor dynamics are fully investigated, and with the use of simulink software, the computer model of the vehicle is simulated. Finally, the motor control laws are presented and the vehicle dynamic behavior studied under different driving conditions. Detailed analyses and comparison of the simulation results are carried out.

Dynamic Modeling and Analysis of a Four Motorized Wheels Electric Vehicle

The invention concerns a system for actively reducing rotational non-uniformity of a shaft (10), in particular the drive shaft of an internal-combustion engine or a shaft which is coupled, or can be coupled, to the drive shaft. The system includes at least one electrical machine (4) which is coupled, or can be coupled, to the shaft, the electrical machine (4) being controlled in such a way that it generates a rapidly varying torque designed to reduce rotational non-uniformity and superimpose on this torque a positive or negative torque designed to produce, in addition, a driving action or a braking or generating action, respectively. The invention also concerns a method of actively reducing rotational non-uniformity using the system.

System for actively reducing rotational non-uniformity of a shaft, in particular the drive shaft of an internal-combustion engine, and method of operating the system

An industrial vehicle includes a transmission, which is coupled to an engine by a torque converter. When the vehicle is accelerating, the rotational acceleration of driving wheels is computed based on the rotational speed of the driving wheels. A traction control procedure is executed based on the rotational acceleration for eliminating spinning of the driving wheels. When the vehicle is decelerating, the rotational deceleration of the driving wheels is computed based on the rotational speed of the driving wheels. An anti-lock brake control procedure is executed based on the rotational deceleration for preventing the driving wheels from locking. As a result, skidding of the driving wheels is reliably prevented by a simple structure.

Driving control apparatus for industrial vehicle

A traction control system combines engine output power limiting with a single point brake for controlling wheel slip. The brake is preferably connected to the engine to reduce torque requirements and avoid drive line shock. One friction member of the preferred brake is coupled to the engine block, and another friction member member is coupled together with a drive pulley to the engine output shaft. An electromagnetic actuator moves the two friction members into engagement with each other within a hollow interior of the drive pulley.

Hybrid traction control system

Un systeme de regulation anti-patinage comprend des capteurs de vitesse (36, 38) associes a une paire de roues motrices (14, 16) afin de surveiller un train d'entrainement d'un vehicule et de detecter une vibration prononcee indiquant un patinage des roues, ainsi que d'autres capteurs de vitesse (40, 42) associes a une paire de roues non-motrices (18, 20) afin de surveiller la vitesse du vehicule. A slip control system includes speed sensors (36, 38) associated with a pair of drive wheels (14, 16) to monitor a pronounced drive train of a vehicle and detecting a vibration indicating slippage wheels, as well as other speed sensors (40, 42) associated with a pair of non-drive wheels (18, 20) to monitor the speed of the vehicle. Un organe de commande electronique (52) compare une ampleur de la vibration avec une duree seuil, qui varie en fonction de la vitesse du vehicule, afin de detecter le patinage des roues, et emet deux signaux de commande permettant de commander la restriction d'un differentiel (24) ainsi que la position d'un etrangleur (32). An electronic controller (52) compares a magnitude of the vibration with a threshold period, which varies depending on the vehicle speed, in order to detect wheel slip, and transmits two control signals for controlling the restriction of a differential (24) and the position of a throttle (32). La restriction du differentiel est accrue en fonction d'une duree de la vibration, et reduite en fonction de la vitesse du vehicule. The restriction of the differential is increased in accordance with a duration of the vibration, and reduced according to the vehicle speed. La puissance de sortie du moteur est reduite en fonction de la difference entre la duree de la vibration et une duree seuil qui decroit proportionnellement avec l'augmentation de la vitesse du vehicule. The engine output power is reduced according to the difference between the duration of the vibration and a threshold duration which decreases proportionally with the increase in vehicle speed.

Traction control system responsive to wheel speed fluctuations

Analysis of Traction Control Systems Augmented by Limited Slip Differentials

A traction control system combines a power limiting system having multiple operating modes with a power distributing system that resists differentiation between drive wheels. Sensors monitor vehicle turning, differentiation between the drive wheels, and wheel slipping of at least one drive wheel. The operating mode of the power limiting system is changed to reflect additional traction information available from monitoring the state of differentiation through turns.

Combined power limiting and power distributing traction control system for improving vehicle performance in turns

A warning system alerts a driver of a motor vehicle to different types of traction losses. A first sensing circuit (10) detects a loss of wheel adhesion by monitoring a vehicle drive line for a pronounced vibration within a range of between ten and fifteen hertz. A second sensing circuit (12) monitors a brake light circuit to detect application of a vehicle brake. A logic circuit (28) combines outputs (A and B) from the first and second sensing circuits and outputs command signals (C and D) that distinguish between a loss of wheel adhesion due to wheel skidding and a loss of wheel adhesion due to wheel slipping. A warning device includes two indicators (36 and 38) that receive the respective command signals and produce sensorially distinguishable warning signals for eliciting different responses from the driver.

Kenneth A. May

Papers

Hybrid traction control system

Traction control system responsive to wheel speed fluctuations

Analysis of Traction Control Systems Augmented by Limited Slip Differentials

Combined power limiting and power distributing traction control system for improving vehicle performance in turns

Warning system distinguishing wheel skidding and wheel slipping