Electric motorcar drive system having shift-lever operated clutch means between electric motor and speed reduction gear
First Claim
1. A drive system for an electric motor vehicle, wherein the electric motor vehicle includes an electric motor and a drive wheel, and wherein the drive system transmits a rotary motion of the electric motor to the drive wheel, the drive system comprising:
- a speed reducing device disposed between the electric motor and the drive wheel and having a single predetermined speed reduction ration;
a clutch disposed between said electric motor and an input member of the speed reducing device, the clutch connecting said electric motor to the drive wheel so that rotary motion of the electric motor is transmitted to the drive wheel and disconnecting the electric motor from the drive wheel so that rotary motion of the electric motor is not transmitted to the drive wheel, the clutch having a connecting position in which the electric motor is connected to the drive wheel and a disconnecting position in which the electric motor is disconnected from the drive wheel;
a shift lever having at least a drive position and a neutral position;
a clutch operating mechanism which operatively connects the shift lever and the clutch, such that when the shift lever is operated to the drive position, the clutch is in the connecting position and when the shift lever is operated to the neutral position, the clutch is in the disconnecting position;
a shift position sensor, said shift position sensor detecting an operation of said shift lever to said neutral position;
a first speed sensor, said first speed sensor detecting a speed of said electric motor;
a second speed sensor, said second speed sensor detecting a speed of said speed reducing device; and
synchronizing means, operable when the operation of said shift lever to said neutral position is detected by said shift position sensor, for controlling said electric motor on the basis of outputs of said first and second speed sensors, such that the speed of said electric motor and a rotating speed of said input member of said speed reducing device substantially coincide with each other while said shift lever is placed in said neutral position.
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Accused Products
Abstract
A drive system for an electric motor vehicle, for transmitting a rotary motion of an electric motor to a drive wheel through a speed reducing device, the system including a clutch device clutch for connection and disconnection between the electric motor and the drive wheel, a shift lever having a drive position and a neutral position, and a clutch operating mechanism which operatively connects the shift lever and the clutch device such that the clutch device is placed in its connecting and disconnecting positions when the shift lever is operated to the drive and neutral positions, respectively.
63 Citations
17 Claims
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1. A drive system for an electric motor vehicle, wherein the electric motor vehicle includes an electric motor and a drive wheel, and wherein the drive system transmits a rotary motion of the electric motor to the drive wheel, the drive system comprising:
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a speed reducing device disposed between the electric motor and the drive wheel and having a single predetermined speed reduction ration; a clutch disposed between said electric motor and an input member of the speed reducing device, the clutch connecting said electric motor to the drive wheel so that rotary motion of the electric motor is transmitted to the drive wheel and disconnecting the electric motor from the drive wheel so that rotary motion of the electric motor is not transmitted to the drive wheel, the clutch having a connecting position in which the electric motor is connected to the drive wheel and a disconnecting position in which the electric motor is disconnected from the drive wheel; a shift lever having at least a drive position and a neutral position; a clutch operating mechanism which operatively connects the shift lever and the clutch, such that when the shift lever is operated to the drive position, the clutch is in the connecting position and when the shift lever is operated to the neutral position, the clutch is in the disconnecting position; a shift position sensor, said shift position sensor detecting an operation of said shift lever to said neutral position; a first speed sensor, said first speed sensor detecting a speed of said electric motor; a second speed sensor, said second speed sensor detecting a speed of said speed reducing device; and synchronizing means, operable when the operation of said shift lever to said neutral position is detected by said shift position sensor, for controlling said electric motor on the basis of outputs of said first and second speed sensors, such that the speed of said electric motor and a rotating speed of said input member of said speed reducing device substantially coincide with each other while said shift lever is placed in said neutral position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification