초록 ▼

A drive system provides a smooth start for a vehicle and converts excess kinetic energy accompanying the difference in speed between the engine and the drive wheels occurring during starting into electrical energy for storage in a battery. The drive system includes a gearbox having at least a first

A drive system provides a smooth start for a vehicle and converts excess kinetic energy accompanying the difference in speed between the engine and the drive wheels occurring during starting into electrical energy for storage in a battery. The drive system includes a gearbox having at least a first gear element connected to an output shaft of an engine, a second gear element connected to a drive wheel of a vehicle and a third gear element for, by applying a braking torque to the third gear element, reducing the speed of rotation input from the first gear element and outputting it to the second gear element. An engaging element provides selective connection to any of the gear elements for mechanically connecting the output shaft of the engine to the drive wheel. The drive system further includes an electric rotary device connected to the third gear element, an accumulator, engine load detector for detecting engine load, speed detector for detecting the speed of at least one of the gear elements of the gearbox and for outputting a speed signal and a control unit.

대표청구항 ▼

[ What is claimed is:] [15.] A drive system for engaging a drive wheel of a vehicle with an output shaft of an engine, said drive system comprising:a gearbox having at least a first gear element connected to the output shaft of the engine, a second gear element connected to the drive wheel of the ve

[ What is claimed is:] [15.] A drive system for engaging a drive wheel of a vehicle with an output shaft of an engine, said drive system comprising:a gearbox having at least a first gear element connected to the output shaft of the engine, a second gear element connected to the drive wheel of the vehicle and a third gear element for receiving a braking torque to reduce speed of rotation input from the first gear element and to output the rotation at the reduced speed to the second gear element;an engaging element for connection to any of said gear elements, said engaging element being selectively engaged to mechanically connect the output shaft of the engine to the drive wheel;an electric rotary device connected to the third gear element;an accumulator for supplying current for driving said electric rotary device and for receiving and storing electrical energy obtained by regeneration;engine load detecting means for detecting engine load;speed detecting means for detecting speed of at least one of the gear elements of the gearbox and for outputting a speed signal;a control unit comprising:electric rotary device controlling means for setting a target speed for the first gear element based on the detected engine load and for bringing the speed of the first gear element, as obtained from the speed signal, to the target speed by driving the electric rotary device to generate a braking torque; andengaging and disengaging means for comparing the speed of a gear element other than the first gear element, obtained from the speed signal, with set values for engaging and disengaging and for engaging and disengaging the engaging element based on the result of the comparison;calculating means for calculating a speed difference or ratio of speeds of two gear elements detected by the speed detecting means; andwherein when the speed of a gear element other than the first gear element obtained from the speed signal is above a set value for engaging and the speed difference or speed ratio calculated by the calculating means is smaller than a preset deviation constant, the engaging and disengaging means engages the engaging element.