JP2006057695A - Emergency transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent malfunction by detecting abnormality due to a failure of an emergency transmission 14 or disturbance such as radio interference. <P>SOLUTION: A circuit configuration is formed by assigning one position of a rotary switch 24 to an OFF position, and obtaining an input signal in all positions. When the rotary switch 24 is operated to select a specified position, in the case where double input occurs or no input occurs, the abnormality of all input is determined to control at the immediately preceding position. When a signal away from the present recognized position by three or more positions is input, the signal is regarded as an abnormal signal and ignored. However, even in the case where the signal is away by three or more positions, the signal of the off position is taken to be effective. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an emergency transmission that switches a gear position of a transmission by directly driving a gear shift unit when shifting is not possible even when a change lever is operated in a semi-automatic system vehicle. The present invention relates to an emergency transmission that performs shift control by operating a rotary switch.

  The change lever unit and the control box are connected by electrical wiring, a change lever position signal is sent to the control box according to the operation of the change lever in the change lever unit, a shift control signal is generated by the control box, and the generated shift 2. Description of the Related Art A transmission control system in which a control signal is sent to a gear shift unit to switch a transmission gear stage has been conventionally known (see, for example, Patent Document 1).

  In the transmission control system, assuming that the gear change unit cannot be shifted even if the change lever is operated due to an abnormality in the electric signal system such as the change lever unit, the control box, and the wiring, the gear shift unit is directly driven to drive the transmission. An emergency transmission (emergency switch box) is provided that enables the shift speed to be changed.

When an emergency transmission is used, the shift control signal from the control box (main controller) is cut off, and the gear position is switched based on the output signal from the emergency transmission. .
Japanese Patent No. 3460928 (page 3-4, FIG. 1)

  As described above, the emergency transmission for the semi-automatic system is configured to drive the gear shift unit in preference to the control of the control box, which is the main controller. If it malfunctions, the vehicle may be directly affected and a dangerous state may be caused.

  The invention according to claim 1 is an emergency transmission that cuts off a shift control signal from a main controller by operating a rotary switch and sends a shift control signal to a gear shift unit to switch a transmission gear stage. The emergency transmission device receives a position signal from the rotary switch, performs processing / determination based on the position signal, and transmits a shift control signal according to the output of the processing determination unit to the gear shift unit. The rotary switch has a circuit configuration in which one position is assigned to the OFF position and each position signal is always obtained from all positions, and the rotary switch is set to a specific position. When operated, the position signal is If not, it is characterized in that to make decisions to shift control in position immediately before the abnormality by the processing determining means.

  According to a third aspect of the present invention, the shift control signal from the main controller is interrupted by operating the rotary switch, and the shift control signal is transmitted to the gear shift unit to switch the transmission gear stage. In the apparatus, the emergency transmission device receives a position signal from the rotary switch, receives a processing determination unit that performs processing / determination based on the position signal, and a shift control signal according to the output of the processing determination unit. A signal sending means for sending to the gear shift unit is included, and the rotary switch is assigned a position to the OFF position, and a circuit is constructed so that each position signal is always obtained from all positions, and this rotary switch is operated. Sometimes 3 positions relative to the currently recognized position When down more distant position signal is determined by the processing determination means that the input is characterized in that to ignore this position signal.

  The emergency transmission of the present invention can detect this when a rotary switch fails and can operate the vehicle in a safe direction by stopping the control of the emergency transmission or not starting the operation. Further, by preventing erroneous input, it is possible to prevent abnormal operation of the emergency transmission in general.

An OFF position is assigned to one position of the rotary switch, and the circuit is configured so that there is an input signal at all positions including this OFF position. When a specific position is selected by operating the rotary switch, multiple inputs or all With the configuration in which it is determined that there is an abnormality when the input is no signal, the object of preventing the vehicle from being affected by malfunction due to failure or disturbance of the emergency transmission is achieved.
Further, in the above circuit configuration, when a signal that is 3 or more positions away from the currently recognized position is input during operation of the rotary switch, the signal is ignored to achieve the object.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. 1 is a front view of an emergency transmission according to an embodiment of the present invention, FIG. 2 is a system configuration diagram showing an example of a control system for a semi-automatic transmission equipped with the emergency transmission, and FIG. 3 is a change lever unit. Is a diagram showing an example of a shift pattern according to, and the configuration of a general transmission control system will be briefly described with reference to these drawings.

  In FIG. 2, 2 is a change lever unit (CLU), 4 is a control box (ECU) as a main controller, 5 is an engine control unit connected to the control box 4 via a communication line 3, and 6 is a gear shift unit (GSU). , 8 is a transmission, 10 is an engine, 12 is an air tank, 14 is an emergency switch box (E / SW) which is an emergency transmission, 16 is a clutch pedal, 18 is a clutch actuator, 19 is an accelerator pedal, 20 is an alarm buzzer, Reference numeral 22 denotes a display unit.

  The change lever unit 2 changes the gear shift operation of the driver into an electric signal, and an example of the shift pattern is shown in FIG. This shift pattern is for an automatic transmission or a semi-automatic transmission, and has two rows of left and right shift lines arranged in the vertical direction, and a select line connecting these shift lines. The line (the shift line on the right side of FIG. 3) is reverse R on the upper side, neutral N on the center and traveling (automatic shift from start) D on the lower side, and the second shift line (shift line on the left side in FIG. 3) is Upshift UP and hold for manual operation HOLD (constant running hold) HOLD and downshift DOWN. Normally, the change lever 2a is moved from the position D during forward traveling by automatic gear shift through the select line, The left shift line UP-HOLD-DOWN is moved to the HOLD position during constant running. Te, perform the upshift or downshift manually operated. A change lever position signal G corresponding to any one of the positions by the operation of the change lever 2 a is sent to the control box 4.

  The control box 4 determines the optimum gear position based on the engine speed signal Ne input through the engine control unit 5, the accelerator depression amount signal A from the accelerator pedal 19, the vehicle speed signal V, and the like. And a T / M (transmission) gear control signal S and a clutch disengagement / engagement control signal C to the clutch actuator 18. In addition to the electrical signal, the control box 4 receives a signal Ca from the clutch switch 16a for detecting depression of the clutch pedal 16, a clutch rotational speed signal Cr from the clutch side, and the like. Further, the engine control unit 5 sends an engine control signal Ec to the engine 10 to control the driving of the engine 10, and as described above, the engine speed signal Ne is sent from the engine 10 side, and the driver's operation. An accelerator depression amount signal A is input from the accelerator pedal 19 to be operated.

  The gear shift unit 6 receives the T / M gear control signal S from the control box 4 and switches the gear position of the transmission 8. Although the illustration of the internal configuration of the gear shift unit 6 is omitted, it has a shift cylinder, a select cylinder, an electromagnetic valve for supplying and discharging air to each of these cylinders, etc. The valve is selectively driven, the supply state of compressed air from the air tank 12 is switched, and the gear position of the transmission 8 is switched.

  The shift cylinder and the select cylinder are provided with a sensor for detecting the position of the piston, and the piston position detected by the sensor is given to the control box 4 as a gear position detection signal GP. The gear position detection signal GP from the gear shift unit 6 is also given to the display unit 22, and the current gear position is displayed on the display unit 22.

  The emergency transmission (E / SW) 14 has a gear shift unit 6 when an abnormality occurs in the electric signal system such as the change lever unit 2, the control box 4 and the wiring, and the gear cannot be changed even if the change lever 2a is operated. Is provided so that the gears of the transmission 8 can be switched. The emergency transmission 14 includes a rotary switch 24 (see FIG. 1), a process determination unit that receives a position signal generated by operating the rotary switch 24, and performs processing / determination based on the position signal. Is provided with a microcomputer (not shown) including signal sending means for sending a shift control signal corresponding to the output of the gear shift unit 6 to the gear shift unit 6. When the rotary switch 24 is operated and rotated in the right direction in FIG. 1, it moves forward, and when rotated in the left direction, it moves backward, and is normally held at the general traveling position (OFF position).

  When the rotary switch 24 is rotated one step in the clockwise direction from the OFF position, the emergency transmission 14 sends a control stop signal E that prevents the T / M gear control signal S from being sent from the control box 4 and is optionally A shift control signal (gear release signal Sa) corresponding to the neutral position is generated. The gear release signal Sa is sent to the gear shift unit 6 instead of the T / M gear control signal S from the control box 4. In response to this gear release signal Sa, the transmission 8 is set to an arbitrary neutral position.

  When the rotary switch 24 is further rotated by one step in the clockwise direction, that is, the operation position is rotated by two steps in the clockwise direction from the OFF position, the emergency transmission device 14 first transmits the shift control signal corresponding to the position “N”. (Select signal) Sb is generated. This select signal Sb is given to the gear shift unit 6. In response to this select signal Sb, the gear shift unit 6 drives a solenoid valve (not shown), and the transmission 8 is set to the neutral position “N”.

  Subsequently, the emergency transmission 14 generates a shift control signal (shift signal) Sc corresponding to the position “2” instead of the select signal Sb. This shift signal Sc is given to the gear shift unit 6, and the transmission 8 is set to the position "2", that is, the two-stage position on the forward side.

  Similarly, when the rotary switch 24 is operated to “2 to 3”, “3 to 4”, “4 to 5”, and “OFF to R”, the gear removal signal Sa is generated in the first stage, and 2 At the stage, the select signal Sb and the shift signal Sc are sequentially generated, and each shift stage of the transmission 8 is switched by a two-stage operation.

  As described above, when the emergency transmission 14 is used, the shift control signal S from the control box 4 as the main controller is cut, and the output signals Sa, Sb, Sc from the emergency transmission 14 are cut. The transmission operation of the transmission 8 is performed based on the above. Therefore, if the malfunction is caused by the failure of the emergency transmission 14 or disturbance such as radio wave interference, there is a risk of directly affecting the movement of the vehicle. It is designed to operate in any direction.

  The present invention is based on the premise that the emergency transmission 14 performs a shift operation using the rotary switch 24. The rotary switch 24 sequentially shifts from one position to the next position, and prevents erroneous input by utilizing the feature that the order of input can be predicted. Further, in order to improve the abnormality detection function, one position of the rotary switch 24 is assigned to the OFF position, and the circuit configuration is such that there is always an input signal no matter which position is selected.

  In the emergency transmission 14 configured as described above, an abnormality can be determined by a combination of input signals. When a plurality of input signals are present when a multiple input, that is, a position where the rotary switch 24 is rotated is selected, all inputs are determined to be abnormal, and control is performed at the position immediately before that. However, when an OFF position signal is included in the plurality of input signals, control is performed even if multiple inputs are determined as the OFF position. Further, even when the input signal is not received at a certain position even though all the positions have an input signal, it is determined that there is an abnormality and the control is performed at the position immediately before that. If there is no signal since the power is turned on, control is performed as an OFF position.

  The type of failure that is the cause of the occurrence of multiple inputs and no signals as described above will be briefly described. For example, if the specific position remains input regardless of the selected position of the rotary switch 24, it is a normal state because it is a single input signal when this specific position, which is an abnormal part, is selected. When any other position is selected, there are input signals from the selected position and the specific position, resulting in multiple inputs. Such a failure occurs when the signal line is short-circuited or grounded, or when the contact is short-circuited with the common terminal.

  Further, when there is no input at a specific position of the rotary switch 24, or when there is a jump input during continuous operation, there is no signal at the abnormal position. Such an abnormality occurs due to a ground short circuit, a power supply short circuit, a poor contact contact, or the like. Furthermore, even when there are two or more inputs at a specific position of the rotary switch 24, it occurs due to a short circuit between contacts, terminals or lines.

  As another erroneous input determination method using the characteristics of the rotary switch 24, a jump signal prohibition condition is set. That is, the movement to the second position is allowed with respect to the currently recognized position, but the input of the signal separated by three positions or more is ignored. As a basic structure, the rotary switch 24 moves one position at a time as it rotates. Regardless of the operation, it is determined that moving three positions at a time is abnormal. Ignore the position input signal. However, even if the signal is 3 or more positions away, if there is an input signal at the OFF position, it is valid as an exception. By performing the determination as described above, when the emergency transmission 14 fails, it can always be operated in a safe direction. In addition, when a signal at a position that is more than 3 positions away is input and this signal is ignored, the next input signal does not meet the skip signal condition based on the position of the ignored signal, that is, the ignored signal If this is an input signal within 2 positions from this position, this signal is validated.

It is a front view of an emergency transmission. (Example 1) It is a system block diagram which shows an example of the transmission control system provided with the said emergency transmission. It is a figure which shows the transmission pattern by a change lever unit.

Explanation of symbols

4 Main controller 6 Gear shift unit 8 Transmission 14 Emergency transmission 24 Rotary switch

Claims (5)

In an emergency transmission device that cuts off a shift control signal from the main controller by operating a rotary switch and sends a shift control signal to the gear shift unit to switch the transmission gear stage.
The emergency transmission device receives a position signal from the rotary switch, performs processing / determination based on the position signal, and a shift control signal corresponding to the output of the processing determination unit to the gear shift unit. It includes a signal sending means for sending, and the rotary switch is configured so that one position is assigned to the OFF position and each position signal is always obtained from all positions, and this rotary switch is operated to a specific position. In this case, if the position signal is multiple input or absent, the process determining means determines that an abnormality has occurred and performs shift control at the position immediately before that.   2. The emergency transmission according to claim 1, wherein when the multiple input includes an OFF position signal, the multiple input is controlled as an OFF position. In an emergency transmission device that cuts off a shift control signal from the main controller by operating a rotary switch and sends a shift control signal to the gear shift unit to switch the transmission gear stage.
The emergency transmission device receives a position signal from the rotary switch, performs processing / determination based on the position signal, and a shift control signal corresponding to the output of the processing determination unit to the gear shift unit. Including a signal sending means for sending out, wherein the rotary switch is configured so that one position is assigned to the OFF position, and each position signal is always obtained from all positions, and when this rotary switch is operated, An emergency transmission apparatus characterized by ignoring the position signal when the processing determination means determines that a position signal that is three or more positions away from the currently recognized position is input.   The emergency transmission according to claim 3, wherein the signal is made valid when the signal separated by three or more positions is an input signal at an OFF position.   4. The emergency transmission according to claim 3, wherein when the next input signal of the signal separated by three or more positions is a signal within two positions from the ignored signal, the signal is made effective. .

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