JP5895274B2 - Electromagnetic clutch sticking relaxation device - Google Patents

Description

The present invention relates to an electromagnetic clutch sticking mitigation device that prevents an electromagnetic clutch provided between an engine such as a hybrid vehicle and a motor generator from sticking due to rust or the like.

2. Description of the Related Art A hybrid vehicle that has both an engine and a motor as a power source of a vehicle and is driven by one or both driving forces is known (see, for example, Japanese Patent Laid-Open No. 11-285107 (Patent Document 1). )).

Some compressors of air conditioners mounted on such hybrid vehicles, idle stop vehicles, and the like have two driving means of driving force obtained by being connected to an engine and driving force by a motor (for example, actual Kaihei 6-87678 (patent document 2)).

This compressor may be connected to a traveling engine to obtain a driving force, or may be obtained by a motor driven by a battery, and both of these driving sources are selectively used. Specifically, an electromagnetic clutch is provided between the engine and the motor generator (having a function as a motor and its generator and starter), and the compressor is controlled by selectively connecting both drive sources of the engine and the motor. To drive. Specifically, when the engine is driven, the friction plate of the electromagnetic clutch is attracted to connect the rotating shaft and the engine to obtain a driving force, while when the engine is stopped, the electromagnetic The driving force by the rotation of the motor is obtained by releasing the friction plate of the clutch.

However, in the case of the control configuration in which the driving force of the compressor is obtained by the operation of the electromagnetic clutch as described above, rust is generated on the surface if not used for a long period of time, and as a result, the parts may stick to each other and become difficult to operate. There is.
On the other hand, for example, in Japanese Patent Application Laid-Open No. 5-79724 (Patent Document 2) and Japanese Patent Application Laid-Open No. 2006-255549 (Patent Document 3), the prime mover is forcibly operated when the unused period reaches a predetermined time. Discloses a method of eliminating adhesion of rust.

JP 11-285107 A Japanese Utility Model Publication No. 6-87678 JP-A-5-79724 JP 2006-255549 A

However, the operation of the prime mover as described above requires considerable power consumption. Further, if the engine is suddenly started while the engine is stopped, the user does not intend to cause anxiety and discomfort.

The present invention has been created in view of the above circumstances, and prevents rusting of an electromagnetic clutch disposed between an engine and a motor generator even when it is not used for a long period of time, thereby facilitating the adsorption and release of the electromagnetic clutch. It is an object of the present invention to provide an electromagnetic clutch sticking mitigation device having such control as can be achieved.

In order to achieve the above object, in the present invention,
An electromagnetic clutch sticking mitigation device for an automobile comprising an engine and a motor generator, in which an electromagnetic clutch is disposed therebetween, and when the electromagnetic clutch is released, the motor can be driven independently by being separated from the engine drive. An electromagnetic clutch adhering mitigation device is provided, characterized by having electromagnetic clutch releasing means for automatically releasing the electromagnetic clutch temporarily after a predetermined time has elapsed since the engine stopped.

In order to achieve the above object, in the present invention,
An electromagnetic clutch sticking mitigation device in an automobile comprising an engine and a motor , wherein an electromagnetic clutch is disposed therebetween, and when the electromagnetic clutch is released, the motor can be driven independently by being separated from engine driving. There is provided an electromagnetic clutch adhering alleviating device comprising electromagnetic clutch releasing means for automatically releasing the electromagnetic clutch automatically after a predetermined time has elapsed since the engine was stopped while the engine was stopped.

According to the electromagnetic clutch sticking mitigation device of the present invention, the electromagnetic clutch between the engine and the motor is operated and temporarily released when an engine stop state in which the automobile is not used elapses for a predetermined time. At this time, the friction plates of the electromagnetic clutch are periodically separated, and sticking due to rust can be suppressed.
In addition, when the method of the present invention is employed, the electromagnetic clutch can be prevented from sticking without starting a large power consumption device such as a prime mover, and the consumption of battery power can be suppressed. Furthermore, according to the present invention, it is possible to avoid unintended motor operation for the user.

According to this electromagnetic clutch adhering relaxation method, not only the electromagnetic clutch is released, but also in consideration of the case where it is not enough, the motor is driven to scrape the rust by rubbing and adsorbing the friction plates of the electromagnetic clutch. Add a process. Since the operation of the motor is weaker in operation sound and vibration than the motor, it is possible to prevent sticking between the electromagnetic clutches more reliably without being noticed by the user.

According to the electromagnetic clutch adhering mitigation device of the present invention, the friction plate of the electromagnetic clutch disposed between the engine and the motor generator is prevented from rusting even when the automobile is not used for a long period of time, and the electromagnetic clutch is smoothly adsorbed and released. Can be.

According to the electromagnetic clutch sticking mitigation device of the present invention, the friction plate of the electromagnetic clutch disposed between the engine and the motor is prevented from rusting even when the automobile is not used for a long period of time, and the electromagnetic clutch is smoothly adsorbed and released. can do.

Next, an electromagnetic clutch sticking relaxation apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. First, an outline of an electromagnetic clutch and its peripheral devices that are targets for prevention of sticking by the electromagnetic clutch sticking relaxation device will be described.

FIG. 1 shows driving of a compressor 5 and a compressor 5 in a hybrid vehicle having at least two driving sources of an internal combustion engine (hereinafter referred to as an engine) 1 such as a gasoline engine and a diesel engine and a motor generator 2 driven by a battery. It is the schematic which shows an apparatus (here air conditioner 3). The motor generator 2 is configured to have a function as a motor that is a travel drive source and a function as a generator and a starter.

In order to control the compressor 5 and the air conditioner 3, a control unit (C / U) 7 is provided. Various signals are input to the control unit 7 from the engine 1, the motor generator 2, and the air conditioner 3 through the multiplexer (MPX) 9, the analog-digital converter (A / C) 8, and the like. The input signal is processed according to a program executed in the control unit 7 and output as a predetermined control signal to control the air conditioner 3, the electromagnetic clutch 4, and the like.

The compressor 5 of the air conditioner 3 is a compressor having two drive sources of a so-called engine and a dedicated motor. The electromagnetic clutch 4 disconnects the connection between the engine 1 and the motor generator 2. The electromagnetic clutch 4 has opposing friction plates 4a and 4b, and is excited by a coil (not shown) when connected to a battery (not shown) according to a command from the control unit 7. When excited, the friction plates 4 a and 4 b are attracted to transmit the rotation of the engine 1 to the rotating shaft 6. The rotation of the engine 1 transmitted to the rotating shaft 6 is transmitted from the pulley 12 to the pulley 13 to drive the compressor 5. The pulley 12 and the pulley 14 are connected by a belt 14.

When the electromagnetic clutch 4 is de-energized, the friction plate 4b slides on the rotary shaft 6 as shown by the arrow and dotted line 4b 'in FIG. 2 to release the friction plates 4a and 4b from each other. When the electromagnetic clutch 4 is released, the transmission of the rotation of the engine 1 is interrupted by the electromagnetic clutch 4, and the rotation of the motor generator 2 operates the compressor 5 via the pulleys 12, 13 and the belt 14 by driving the motor.

Here, the relationship between the operation of the engine 1 and the operation of the electromagnetic clutch 4 will be described. When the engine 1 is started, the electromagnetic clutch is connected (ON) to a battery (not shown), the friction plates 4a and b are adsorbed, and the engine 1 is started by the motor generator 2. When the motor generator or the compressor does not need to be operated after the engine 1 is started, the friction plates 4a and b are released by the C / U command to prevent the motor generator 2 from being dragged. Further, when the motor generator or the compressor needs to be operated, the friction plates 4a and 4b are attracted to the electromagnetic clutch 4 by a C / U command. When the motor generator or the compressor needs to be operated during idle stop, the electromagnetic clutch 4 is disconnected (OFF) to release the friction plates 4a and b.

Consider the case where the engine 1 is not used for a long time. The engine 1 is braked in the previous operation, and the friction plates 4a and b of the electromagnetic clutch 4 are normally stopped in the attracted state. For this reason, if it is left as it is for a long time, the friction plates 4a and b of the electromagnetic clutch 4 may rust and may adhere to each other. As described above, when the electromagnetic clutch 4 is in the fixed state, the friction plates 4a and 4b are not released or difficult to release even if the electromagnetic clutch 4 is to be disconnected (OFF) during running or idle stop.

The electromagnetic clutch sticking mitigation device of the present invention is provided to avoid such a problem. FIG. 2 to FIG. 3 show an example of a specific control configuration in the electromagnetic clutch sticking mitigation device.
In this electromagnetic clutch adhering mitigation device, the number of revolutions of the engine 1, the time since the ignition coil (not shown) was last cut, and the non-operation elapsed time after the previous operation of the electromagnetic clutch 4 are detected. And (1) whether or not the ignition coil is left for a long time since the previous disconnection, or (2) whether or not the electromagnetic clutch 4 has been inactive after the previous operation and maintained in the attracted state for a long time. The determination is made in parallel, and the above-described release operation of the electromagnetic clutch 4 and suction rubbing work are performed.

With reference to FIG. 2, (1) determination of whether or not the ignition coil has been left for a long time since the previous disconnection will be described. First, the engine speed r1 is detected (STEP 1). This detection is originally performed regardless of the electromagnetic clutch fixing mitigation device. Next, an elapsed time t1 from when the ignition coil is cut off is detected (STEP 2). The ignition coil is an engine ignition transformer, and the presence / absence of operation of the engine can be digitally determined by detecting connection / disconnection (ON / OFF) of the device.

Next, whether the time t1 from when the ignition coil was last cut (OFF) has elapsed from the predetermined time T1 (t1 ≧ T1), and whether the engine speed r1 is 0 (zero). (R1 = 0) is determined (STEP 3).
When the predetermined time T1 has elapsed since the ignition coil is cut off (OFF), and when the engine speed r1 is 0 (when t1 ≧ T1 and r1 = 0), the electromagnetic clutch 4 is released and attracted by friction. Work is performed (STEP 4).

In STEP 4, first, (1) temporary release of the electromagnetic clutch 4 is instructed. In this step, the electromagnetic clutch 4 is disconnected. At this time, the friction plates 4a and 4b of the electromagnetic clutch 4 are normally released from each other, and even when the friction plates 4a and b are not used for a long period of time (when t1 ≧ T1), the two friction plates 4a, If it is a little fixed state between b, it will be relieved. In addition, there may be a case where the fixation due to rust generated between the friction plates 4a and 4b proceeds and the electromagnetic clutch 4 is not released only by disconnection.

Therefore, a further process is added to the electromagnetic clutch sticking mitigation device. When a command to release the electromagnetic clutch 4 is issued, (2) the electromagnetic clutch 4 is driven to rotate. The rotation speed at this time drives a predetermined rotation speed A (rpm) set in advance. By this rotation, the contact surfaces of the friction plates 4a and 4b rotate while being rubbed against each other (referred to as “rubbing adsorption operation” in this specification), and are released from the adsorption state when the rust is removed. By this step, the sticking between the friction plates 4a and 4b can be prevented and eliminated more reliably than simply releasing the electromagnetic clutch 4. When the rotational driving of the electromagnetic clutch 4 at the predetermined rotational speed A (rpm) is completed, (3) the operation is stopped as it is. The electromagnetic clutch 4 is again commanded to be attracted and returns to a state where the engine can be started.

Further, referring to FIG. 3, (2) determination of whether or not the ignition coil has been left for a long time since the previous disconnection will be described. First, the engine speed r1 is detected as in the flow of FIG. 2 (STEP 1). Next, the elapsed time t2 of the non-operation state after the previous operation of the electromagnetic clutch 4 is detected (STEP 5). Then, it is determined whether the non-operation elapsed time t2 after the previous operation of the electromagnetic clutch 4 is equal to or longer than the predetermined time T2 (whether t2 ≧ T2) (STEP 6). As a result of the determination, when the non-operation elapsed time t2 is equal to or longer than the predetermined time T2 (t2 ≧ T2), the operating state of the engine 1 is also determined and waits for the engine not to rotate (r1 = 0). (STEP 7), the releasing process of the electromagnetic clutch 4 similar to STEP 4 in FIG. 2 is performed (STEP 8).

As described above, an example of the control configuration of the electromagnetic clutch fixing mitigation device has been shown, but other configurations may be used as long as the control configuration is such that the electromagnetic clutch 4 is disengaged and preferably frictional adsorption (STEP 8) is performed. For example, in the flowcharts of FIG. 2 and FIG. 3 described above, (1) the determination of the predetermined time from the engine stop is the determination of the elapsed time t1 from the previous disconnection of the ignition coil, and (2) the non-operational progress of the electromagnetic clutch 4 Although the determination of the time t2 is performed in parallel, a case where both conditions (1) and (2) are satisfied or a case where other conditions are added may be employed. Moreover, you may set the predetermined time after an engine stop to the rust adhering estimated time set beforehand. Furthermore, since the occurrence of rust varies depending on environmental factors such as region and season, the predetermined time may be changeable. For example, a dealer such as a coastal area or a cold area may be set before delivery.

In addition, since the electromagnetic clutch fixing mitigation device according to the present invention can use the motor generator 2 as a motor for driving the compressor separately from the traveling motor, the compressor 5 can be used even when the traveling engine 1 is stopped. The air conditioner 3 can be continuously used even when the engine is stopped. Therefore, the present invention can also be applied to an idle stop vehicle.

As mentioned above, although embodiment and the concept about the electromagnetic clutch adhering mitigation device of the present invention have been described, the present invention is not limited to this and does not depart from the spirit and teaching described in the claims and the description. It will be understood by those skilled in the art that still other modifications and improvements can be obtained within the scope.

1 Engine 2 Motor generator 3 Air conditioning equipment 4 Electromagnetic clutch 5 Compressor

Claims (2)

An engine and a motor, disposed an electromagnetic clutch in between, the electromagnetic clutch when is released the electromagnetic clutch in a motor vehicle which can be separated from the driving of the engine rows run by driving the motor alone An anti-sticking device,
During the stop of the engine, determines whether the predetermined time elapses after the engine stop, having an electromagnetic clutch release means for automatically releasing the temporary electromagnetic clutch when the predetermined time has elapsed, the An electromagnetic clutch adhesion mitigating device. 2. The electromagnetic clutch sticking relaxation apparatus according to claim 1, wherein the electromagnetic clutch releasing means performs a frictional adsorption operation of the electromagnetic clutch by driving the motor after releasing the electromagnetic clutch for a predetermined time. .

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