JPH04328024A - Auxiliary braking acceleration device of automobile - Google Patents

Abstract

PURPOSE:To attempt to reduce noise and shift and, at the same time, shorten shifting time by electrically raising rotational speed of the gear on the side of an internal combustion engine by means of a squirrel-cage induction machine at the shift down time of a transmission, and synchronizing it with the rotational speed of the gear on the side of a shaft. CONSTITUTION:An electrical means 10 which gives a braking magnetic field that reduces rotational speed or an acceleration magnetic field that increases the rotational speed to a squirrel-cage induction machine 2 connected directly to the main shaft of an internal combustion engine 1 is provided. Also, an automatic shifting means 23 that automatically controls a transmission 21 and a clutch 22 in response to a control signal generated by driving operation is provided. In an auxiliary braking acceleration device constituted in this manner, an acceleration auxiliary means 8 that receives the signal from the automatic shifting means 23 and gives the acceleration magnetic field to the squirrel-cage induction machine in its neutral position at the shift down time of the transmission 21 is provided to the electrical means 10. The rotational speed of the squirrel-cage induction machine 2 is increased until it target rotational speed by the action of the said means 8, thereby the shock at the shifting time is reduced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of Industrial Application The present invention is applied to automatic transmissions for automobiles. The present invention relates to an auxiliary braking/accelerating device for an automobile that can eliminate shock and noise by matching the rotation of two gears that are about to mesh during gear shifting.

0002

[Prior Art] Conventionally, this type of auxiliary braking/acceleration device has a W
Publication No. O88/06107 (PCT/JP88/001
57), an electromagnetic rotating machine (squirrel cage induction machine) is directly connected to the main shaft of an internal combustion engine that drives the axle of an automobile, and a brake is applied to this electromagnetic rotating machine to reduce its rotational speed. Some vehicles are equipped with electric means for applying a magnetic field or an accelerating magnetic field to increase the rotational speed, and automatic transmission means for automatically controlling the transmission and clutch according to control signals generated by driving operations.

[0003] Conventional automatic transmission devices using a device configured as described above use an electromagnetic rotary machine to apply braking force to the internal combustion engine to reduce its rotational speed when the transmission is upshifting, thereby reducing the speed change shock. In addition to reducing the number of clutches, there is also a system that eliminates the need for double clutch operation to shorten gear shift time (Japanese Patent Laid-Open No. 61-160
Publication No. 322).

0004

[Problems to be Solved by the Invention] Conventional auxiliary braking/accelerating devices are used as electric braking as described above, so it is necessary to reduce the shift shock only when the transmission is shifted up, and to prevent double clutch operation. It was designed to shorten gear shifting time by eliminating
It is not intended for downshifting.

[0005] Even during downshifting, if the mass of the flywheel is large, a large inertial force acts, which deteriorates the response of the internal combustion engine and increases the shock when the clutch is engaged. To this end, a double clutch operation is used to accelerate the internal combustion engine and soften the shift shock.

[0006] Also, in the case of electronically controlled automatic shifting, the shift shock during downshifting is also large, and electronic governors have been put into practical use to reduce the shift shock, but in this case, Since the internal combustion engine is used for acceleration, there is a problem that the noise during gear shifting becomes louder.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and it is an object of the present invention to provide a device that can reduce shift shock during downshifting of a transmission and noise during shift.

[0008]

[Means for Solving the Problems] The present invention provides an electromagnetic rotating machine that is directly connected to the main shaft of an internal combustion engine that drives the axle of an automobile, and a braking magnetic field that reduces the rotational speed or a braking magnetic field that reduces the rotational speed of the electromagnetic rotating machine. An auxiliary braking/accelerating device for a motor vehicle, further comprising an electric means for applying an accelerating magnetic field to increase the accelerating magnetic field, and an automatic transmission means for automatically controlling a transmission and a clutch according to a control signal generated by a driving operation, wherein the electric means is characterized in that it includes means for receiving a signal from the automatic transmission means and applying an accelerating magnetic field to the electromagnetic rotating machine at its neutral position when the transmission is downshifted.

[0009] The electromagnetic rotating machine is a squirrel cage induction machine,
It is desirable that the braking magnetic field and the accelerating magnetic field are multiphase rotating magnetic fields.

0010

[Operation] The internal combustion engine receives signals from the automatic transmission that automatically controls the transmission and clutch according to control signals generated by driving operations, and when the transmission is downshifted, the internal combustion engine is in the neutral position of the transmission gear. An accelerating magnetic field that increases the rotational speed is applied to an electromagnetic rotating machine (squirrel cage induction machine) directly connected to the main shaft of the internal combustion engine, increasing the rotational speed of the gear on the internal combustion engine side and synchronizing it with the rotational speed of the gear on the axle side. In this case, since the acceleration is electrical, the noise is small.

[0011] This makes it possible to reduce the shock that occurs during gear shifting, eliminate double clutch operation, shorten gear shifting time, and reduce noise generated during gear shifting.

0012

Embodiments Next, embodiments of the present invention will be explained based on the drawings. Figure 1 is a block diagram showing the configuration of an embodiment of the present invention, Figure 2
FIG. 3 is a diagram showing an example of arrangement of various sensors according to an embodiment of the present invention.

The embodiment of the present invention includes a squirrel cage induction machine 2 constituting an electromagnetic rotating machine directly connected to the main shaft of an internal combustion engine 1 that drives an axle of an automobile, and a method for reducing the rotational speed of the squirrel cage induction machine 2. Equipped with an electric means 10 for applying a braking magnetic field or an accelerating magnetic field (multiphase rotating magnetic field) that increases the rotational speed, and an automatic transmission means 23 for automatically controlling a transmission 21 and a clutch 22 in accordance with a control signal generated by driving operation. Further, as a feature of the present invention, the electrical means 10 includes:
It includes an acceleration assisting means 8 which receives a signal from the automatic transmission means 23 and applies an accelerating magnetic field to the squirrel cage induction machine 2 at its neutral position when the transmission 21 is downshifted.

The sensors according to this embodiment include a rotation sensor 16 for detecting the rotation speed of the internal combustion engine, and a clutch 22.
A clutch sensor 17 that detects the engaged/disconnected state of the transmission gear, a shift sensor 18 that detects the shift state of the transmission gear, a gear position sensor 19 that detects the gear position, and a vehicle speed sensor 24 that detects the vehicle speed are provided. Each detection output is sent to the control circuit 5.

The electric means 10 includes a secondary battery circuit 3 as a circuit means for performing auxiliary braking acceleration, and the DC voltage of the secondary battery circuit 3 is lowered by the shaft rotation speed of the squirrel cage induction machine 2. converting it into an alternating current voltage with a frequency suitable for inducing the rotating magnetic field, and applying it to the squirrel cage induction machine 2;
Additionally, an inverter circuit 4 converts AC power from the squirrel cage induction machine 2 into DC power, and a control circuit 5 generates a control signal to set the frequency of the AC side voltage of the inverter circuit 4.
and a capacitor 7 connected to the output side of the inverter circuit 4.
and a semiconductor switch circuit 12, a resistor 11 that dissipates excess electrical energy that cannot be regenerated when braking is performed, a detection circuit 13 that detects the output voltage of the inverter circuit 4, and a current of the resistor 11. A current detector 15 detects a change in the current detector 15, and a switch control circuit 14 controls the semiconductor switch circuit 12 according to a detection signal from the current detector 15.

Next, the operation of the embodiment of the present invention constructed as described above will be explained. FIG. 3 is a flowchart showing the flow of the control operation of the control circuit in the embodiment of the present invention.

The control circuit 5 receives the engagement/disengagement state of a clutch (not shown) from the clutch sensor 17, and determines whether the clutch is in the engagement or disengagement state. If the gear is in contact, the gear position is not changed and the process ends. If it is in the disconnected state, the gear position is read from the gear position sensor 19, and the vehicle speed at that time is read from the vehicle speed sensor 24. Furthermore, the rotational speed of the internal combustion engine 1 is taken in from the rotation sensor 16, and it is determined whether or not it is necessary to downshift by referring to the values taken in from each sensor.

If it is determined that there is no need to downshift, the process is terminated, and if it is determined that it is necessary to downshift, a target rotational speed is calculated. Next, the acceleration assisting means 8 is driven to increase the rotational speed of the internal combustion engine 1 to the calculated target rotational speed.

The acceleration assisting means 8 confirms that the transmission 21 is in the neutral position based on the signal from the automatic transmission means 23, and applies an acceleration magnetic field to the control circuit 5 to increase the rotational speed of the squirrel cage induction machine 2. (multiphase rotating magnetic field) is sent.

Upon receiving this request, the control circuit 5 sends a control signal to the inverter circuit 4, and the inverter circuit 4 applies an accelerating magnetic field to the squirrel cage induction machine 2 to increase the rotational speed of the squirrel cage induction machine 2.

The control circuit 5 receives the rotation speed of the internal combustion engine 1 from the rotation sensor 16, determines whether the rotation speed has increased to the target rotation speed, and if the rotation speed has not increased, the acceleration assisting means 8 is activated again.
is driven to apply an accelerating magnetic field to the squirrel cage induction machine 2 from the inverter circuit 4 under the control of the control circuit 5. This operation is repeated until the rotational speed of the squirrel cage induction machine 2 reaches the target value.

If the rotational speed has reached the target value, the automatic transmission means 23 is controlled to change the gear position to perform a downshift, and after confirming the execution of the downshift, the acceleration operation is stopped.

[0023]

As explained above, according to the present invention, the rotation speed of the gear on the internal combustion engine side is electrically increased by the squirrel cage induction machine and synchronized with the rotation speed of the gear on the axle side when the transmission is downshifted. . Therefore, the noise is reduced, the shift shock is reduced, and the shift time can be shortened by eliminating double clutch operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing an example of arrangement of various sensors according to an embodiment of the present invention.

FIG. 3 is a flowchart showing the operation flow of the control circuit in the embodiment of the present invention.

[Explanation of symbols]

1 Internal combustion engine 2 Squirrel cage induction machine 3 Secondary battery circuit 4 Inverter circuit 5 Control circuit 7 Capacitor 8 Acceleration auxiliary means 10 Electrical means 11 Resistor 12 Semiconductor switch circuit 13 Detection circuit 14 Switch control circuit 15 Current detector 16 Rotation sensor 17 Clutch sensor 18 Shift sensor 19 Gear position sensor 21 Transmission 22 Clutch 23 Automatic transmission means 24 Vehicle speed sensor

Claims (2)

[Claims] Claim 1: An electromagnetic rotating machine that is directly connected to the main shaft of an internal combustion engine that drives the axle of an automobile, and an electric motor that applies a braking magnetic field to reduce the rotational speed or an accelerating magnetic field to increase the rotational speed to the electromagnetic rotating machine. In the auxiliary braking/acceleration device for a motor vehicle, further comprising an automatic transmission means for automatically controlling a transmission and a clutch in accordance with a control signal generated by a driving operation, the electric means is configured to control a transmission from the automatic transmission means. An auxiliary braking/accelerating device for a motor vehicle, comprising means for receiving a signal and applying an accelerating magnetic field to the electromagnetic rotary machine in its neutral position when the transmission is downshifted. 2. The auxiliary braking/accelerating device for a motor vehicle according to claim 1, wherein the electromagnetic rotating machine is a squirrel cage induction machine, and the braking magnetic field and the accelerating magnetic field are multiphase rotating magnetic fields.