JP2013119829A - Control device of internal combustion engine - Google Patents

Abstract

An object of the present invention is to suppress rapid transmission of power when a clutch is suddenly engaged.
When the speed at which the clutch pedal 4 is released exceeds a predetermined value, the output of the engine 5 is reduced, and when the clutch pedal 4 is released, or when the clutch pedal 4 is suddenly released, the accelerator pedal is released. When the clutch 3 is suddenly engaged, for example, when the engine is depressed, the power transmitted to the input shaft 2 of the transmission is prevented from rapidly increasing.
[Selection] Figure 1

Description

  The present invention relates to a control device for an internal combustion engine, and suppresses a rapid transmission of power when a clutch is suddenly engaged with a clutch operation of a vehicle equipped with a manual transmission.

  A vehicle equipped with a manual transmission is provided with a clutch between the engine and the manual transmission in order to intermittently connect or connect power from the internal combustion engine (engine) to the manual transmission. The clutch is disengaged when the clutch pedal is depressed, and is engaged when the clutch pedal is depressed, and power is connected / disconnected between the engine and the manual transmission.

  When the clutch pedal is fully depressed, the clutch is disengaged and the power is cut off.When the clutch pedal is gradually released, the clutch is gradually engaged, and when the clutch pedal is released, the clutch is completely engaged. Combined. As a result, power is transmitted between the engine and the manual transmission.

  In a vehicle equipped with a manual transmission, it is conceivable to depress the clutch pedal in the process of gradually stepping away from the state where the driver depresses the clutch pedal. In this case, the clutch is suddenly engaged, and the engine power is transmitted to the manual transmission side (output mechanism side) suddenly, and the parts such as the drive system, the mount that supports the power plant, the structure of the mounting part of the parts, etc. A large load (input) is added to the.

  Under such circumstances, when the clutch pedal demounting speed is high, there has been conventionally proposed a technique for controlling the driving of the actuator to suppress the clutch engagement and to suppress the transmission of an excessive load (for example, , See Patent Document 1). As a result, even when the clutch pedal is depressed, the rapid transmission of power is suppressed to suppress an increase in load applied to components such as mounts that support the drive system and power plant, the structure of the mounting portion of the components, etc. It becomes possible.

  However, since the technique of Patent Document 1 is a technique for controlling the operation of the clutch itself by an actuator to suppress an increase in load, it can be used only for a mechanism technique for transmitting the operation of the clutch pedal to the clutch via the actuator. Can not. In other words, it cannot be adopted in the technology of a mechanism that transmits the operation of the clutch pedal to the clutch as it is by means of a rope or the like.

JP 2004-76897 A

  The present invention has been made in view of the above situation, regardless of the mechanism for transmitting the operation of the clutch pedal to the clutch, when the clutch pedal is depressed, when the clutch pedal is suddenly released and the accelerator pedal is depressed, etc. It is an object of the present invention to provide a control device for an internal combustion engine that can suppress a rapid transmission of power when the clutch is suddenly engaged.

  In order to achieve the above object, a control apparatus for an internal combustion engine according to a first aspect of the present invention includes a clutch for connecting / disconnecting power between an internal combustion engine mounted on a vehicle and a transmission, and the clutch is separated from the clutch. A clutch pedal for performing clutch engagement / disengagement operation, a speed condition detecting means for detecting the condition of the operation speed of the clutch pedal, and the speed condition detecting means detecting that the depressing speed of the clutch pedal exceeds a predetermined value And control means for reducing the output of the engine.

  In the present invention according to claim 1, when the rate of change of the clutch pedal depressing speed exceeds a predetermined value, it is assumed that the clutch pedal is disengaged and the clutch is suddenly engaged. Since the output can be reduced, rapid transmission of power can be suppressed without controlling the operation of the clutch itself.

  Therefore, regardless of the mechanism that transmits the operation of the clutch pedal to the clutch, the power is reduced when the clutch pedal is released, or when the clutch is suddenly engaged, such as when the clutch pedal is suddenly released and the accelerator pedal is depressed. Can be suppressed.

  The rapid transmission of power increases as the engine increases, and increases as the inertial mass of the rotating part increases. For this reason, when multiple engine models are used in the same vehicle model, the structure of parts such as mounts and the mounting part of the parts are determined by the specifications with a large load, and engines other than those with a large load are adopted. In this case, there is a risk of excessive quality. On the other hand, by applying the invention of the present application, the structure of the parts, the mounting portion, and the like are not restricted by the engine having a heavy load specification, and the problem of excessive quality can be solved.

  The control apparatus for an internal combustion engine according to a second aspect of the present invention is the control apparatus for an internal combustion engine according to the first aspect, wherein the speed condition detecting means is a stroke sensor that detects an operation stroke of the clutch pedal. The control means determines that the release speed of the clutch pedal exceeds a predetermined value when the rate of change of the operation stroke detected by the stroke sensor exceeds a predetermined value. .

  In the present invention according to claim 2, it is possible to detect the depressing speed of the clutch pedal by applying an existing stroke sensor used in a vehicle.

  According to a third aspect of the present invention, there is provided the internal combustion engine control apparatus according to the first or second aspect, wherein the control means has a rotational speed of the engine equal to or higher than a predetermined rotational speed. In the case where the output is, the output is reduced.

  In the third aspect of the present invention, when the vehicle travels, such as at the time of starting, rapid transmission of power can be suppressed when the clutch is suddenly engaged.

  According to a fourth aspect of the present invention, there is provided a control device for an internal combustion engine according to the third aspect of the present invention, wherein the control device for the internal combustion engine is provided with a clutch for connecting / disconnecting power between the internal combustion engine and the transmission. The operating force of the clutch pedal is transmitted to the clutch through a cable body.

  The present invention according to claim 4 can be applied to a mechanism in which the operating force of the clutch pedal is directly transmitted to the clutch through the cable body.

  The control device for an internal combustion engine according to the present invention is not limited to a mechanism that transmits the operation of the clutch pedal to the clutch, and the clutch is operated when the clutch pedal is depressed or when the accelerator pedal is stepped off and the accelerator pedal is depressed. It becomes possible to suppress a rapid transmission of power at the time of rapid joining.

It is a block block diagram of the control apparatus of the internal combustion engine which concerns on one Example of this invention. It is a flowchart explaining the process of the control apparatus of the internal combustion engine which concerns on one Example of this invention. It is a graph showing the time-dependent change of the load at the time of clutch engagement.

  FIG. 1 shows a schematic configuration of a control device for an internal combustion engine according to an embodiment of the present invention, FIG. 2 shows a control processing flow, FIG. 3 shows components such as a drive system and a mount for supporting a power plant, and parts removal. The change with time of the load applied to the structure and the like of the attached portion is shown.

  As shown in FIG. 1, a clutch 3 is provided between an output shaft (crankshaft) 1 of an internal combustion engine (engine) 5 mounted on a vehicle and an input shaft 2 of a transmission (manual transmission). . The clutch 3 disconnects and transmits power between the crankshaft 1 and the input shaft 2 (between the engine 5 and the transmission). That is, when the plate 11 of the clutch 3 is operated in the axial direction, the power of the flywheel 13 on the crankshaft 1 side is connected to the input shaft 2 via the clutch disk 12, or the flywheel 13 on the crankshaft 1 side is connected. To the input shaft 2 is cut off.

  A clutch pedal 4 for performing a connection / disconnection operation of the clutch 3 is provided, and an operation unit 14 for operating the plate 11 is connected to the clutch 3. The clutch pedal 4 is coupled to the operation unit 14 via the cord body 15, and the operation unit 14 is operated via the cord body 15 by a stepping operation and a stepping-off operation of the clutch pedal 4. As a result, power connection / disconnection is performed between the crankshaft 1 and the input shaft 2 (between the engine 5 and the transmission), and a transmission operation can be performed by the transmission when the power is disconnected.

  When the clutch pedal 4 is fully depressed, the clutch 3 is disengaged. When the clutch pedal 4 is gradually depressed, the clutch 3 is gradually engaged. When the clutch pedal 4 is depressed, the clutch 3 is completely disengaged. To be joined.

  It is conceivable to depress the clutch pedal 4 in the process of gradually depressing the clutch pedal 4 from the depressed state. Further, it is conceivable to perform an operation in which the accelerator pedal is depressed by suddenly depressing the clutch pedal 4 from the depressed state. In these cases, the clutch 3 is suddenly engaged, and the power of the engine 5 is suddenly transmitted to the input shaft 2 of the transmission, and the parts such as the drive system, the mount for supporting the power plant, the structure of the mounting part of the parts, etc. A large load (input) is added to the.

  For this reason, in the control apparatus for an internal combustion engine in the present embodiment, when the release speed of the clutch pedal 4 is high, that is, when the rate of change in the release speed of the clutch pedal 4 exceeds a predetermined value, the output of the engine 5 is output. The power transmitted from the engine 5 to the input shaft 2 of the transmission is prevented from rapidly increasing.

  That is, as shown in FIG. 1, the clutch pedal 4 is provided with a stroke sensor 6 as speed condition detecting means for detecting the depressing speed of the clutch pedal 4, and detection information of the stroke sensor 6 is input to the control device 7. Is done. In the control device 7, the change rate of the release stroke of the clutch pedal 4 detected by the stroke sensor 6 is determined, and when the change rate exceeds a predetermined value, the release speed of the clutch pedal 4 exceeds the predetermined value. It is judged that

  Information on the rotational speed Ne of the engine 5, vehicle speed information, and brake operation information is input to the control device 7, and it is determined that the vehicle is in a predetermined driving state. When the control device 7 determines that the release speed of the clutch pedal 4 has exceeded a predetermined value when the engine 5 is in a predetermined operation state, the control device 7 injects fuel into the engine 5. A command is sent to control the volume, intake volume, and ignition timing to reduce the output.

  When the speed at which the clutch pedal 4 is released exceeds a predetermined value, the output of the engine 5 is reduced, so that rapid transmission of power can be suppressed without controlling the operation of the clutch 3 itself. That is, when the clutch 3 is suddenly engaged when the clutch pedal 4 is stepped off or when the clutch pedal 4 is suddenly released and the accelerator pedal is depressed, the output of the engine 5 is reduced. Therefore, the power transmitted to the input shaft 2 of the transmission does not increase rapidly.

  A specific processing situation will be described with reference to FIGS.

  As shown in FIG. 2, it is determined in step S1 that the vehicle speed Vkm / h is equal to or lower than a predetermined vehicle speed vkm / h (for example, 5 km / h). In step S2, it is determined that the brake is not in operation. When it is determined that the rotational speed Ne of the engine 5 is equal to or higher than the predetermined rotational speed Nea, it is determined that the vehicle is in a starting state, and the stroke stroke S of the clutch pedal 4 is read by the stroke sensor 6 in step S4.

  If it is determined in step S1 that the vehicle speed Vkm / h exceeds the predetermined vehicle speed vkm / h, or if it is determined in step S2 that the brake is operating, then in step S3, the rotational speed Ne of the engine 5 is predetermined. When it is determined that the speed Nea is not reached, the control of this embodiment is not executed and the process is ended.

  When the release stroke S of the clutch pedal 4 is read by the stroke sensor 6 in step S4, it is determined in step S5 whether or not the rate of change (dS / dt) of the release stroke S is greater than or equal to a predetermined rate of change b. If it is determined in step S5 that the rate of change (dS / dt) is equal to or greater than the predetermined rate of change b, it is determined that the stepping speed of the clutch pedal 4 has exceeded a predetermined value.

  In other words, it is determined that the clutch pedal 4 is being released in the process of gradually releasing the clutch pedal 4 from being depressed. Alternatively, it is determined that the operation is a sudden start in which the accelerator pedal is depressed by suddenly depressing the clutch pedal 4 from being depressed.

  If it is determined in step S5 that the rate of change (dS / dt) is equal to or greater than the predetermined rate of change b and the depressing speed of the clutch pedal 4 exceeds the predetermined value, the output of the engine 5 is reduced in step S6. Processing is executed. Therefore, when the depressing speed of the clutch pedal 4 exceeds a predetermined value, it is possible to reduce the output of the engine 5 and suppress the sudden increase in power transmitted to the input shaft 2 of the transmission.

  As shown by the solid line in FIG. 3, when the clutch 3 is engaged at time t1, the power of the engine 5 is transmitted to the input shaft 2 of the transmission, and the components such as the drive system, the mount that supports the power plant, A load (input) P1 is applied to the structure of the mounting portion. As shown by the dotted line in FIG. 3, when the process of reducing the output to the engine 5 is not performed, the power transmitted to the input shaft 2 of the transmission increases rapidly, and the components such as the drive system, the mount that supports the power plant, A large load (input) P2 is applied to the structure of the part mounting portion.

  For this reason, even if the mechanism transmits the operation of the clutch pedal 4 to the clutch 3 as it is via the rope body 15, when the clutch pedal is stepped off, when the clutch pedal is stepped on suddenly and the accelerator pedal is stepped on, etc. It becomes possible to suppress the rapid transmission of power when the clutch is suddenly engaged.

  Even if multiple engine models are used in the same vehicle type, and sudden transmission of power differs depending on the size of the engine, it is possible to suppress sudden transmission of power. It is not necessary to unify the structure of the part mounting part to the engine specifications with the maximum load (input). For this reason, even if an engine having a relatively small load (input) is mounted, the quality does not become excessive.

  INDUSTRIAL APPLICABILITY The present invention can be used in the industrial field of a control device for an internal combustion engine that suppresses rapid transmission of power when a clutch is suddenly engaged with a clutch operation of a vehicle equipped with a manual transmission.

DESCRIPTION OF SYMBOLS 1 Crankshaft 2 Input shaft 3 Clutch 4 Clutch pedal 5 Engine 6 Stroke sensor 7 Control apparatus 11 Plate 12 Clutch disk 13 Flywheel 14 Operation part 15 Search body

Claims (4)

A clutch for connecting and disconnecting power between an internal combustion engine and a transmission mounted on a vehicle;
A clutch pedal that engages and disengages the clutch by being stepped on;
Speed status detecting means for detecting the status of the operation speed of the clutch pedal;
A control device for an internal combustion engine, comprising: control means for reducing the output of the engine when the speed state detecting means detects that the clutch pedal depressing speed exceeds a predetermined value. The control apparatus for an internal combustion engine according to claim 1,
The speed status detection means is
A stroke sensor for detecting an operation stroke of the clutch pedal;
The control means includes
A control device for an internal combustion engine, wherein when the rate of change of the operation stroke detected by the stroke sensor exceeds a predetermined value, it is determined that the depressing speed of the clutch pedal exceeds a predetermined value. The control apparatus for an internal combustion engine according to claim 1 or 2,
The control device of the internal combustion engine, wherein the control means reduces the output when the rotational speed of the engine is equal to or higher than a predetermined rotational speed. The control apparatus for an internal combustion engine according to claim 3,
A clutch for connecting / disconnecting and transmitting power between the internal combustion engine and the transmission,
A control device for an internal combustion engine, wherein an operating force of the clutch pedal is transmitted to the clutch via a cable body.

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