JPH10288024A - Oil pan of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bisection type oil pan where an oil mixing between two rooms is accelerated to prevent the biased deterioration of only an oil in one oil room. SOLUTION: Valves 21, 22 are arranged on a partition 13 to separate the first room 11 and the second room 12, and a screw 25 is arranged near the valve in the second room. In the case where the temperature of an oil 81 is detected, and moreover the actuation or nonactuation of an internal combustion engine is detected, and the internal combustion engine functions and the oil temperature is below a fixed value, the valve is closed to stop the screw, and in the case where the oil temperature exceeds the fixed value, the valve is opened to stop the screw. In the case where the internal combustion engine is actuated and the valve is not opened more than fixed time, or the engine has been stopped, the valve is opened as long as a fixed time to actuate the screw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-part oil pan for an internal combustion engine divided into a first chamber and a second chamber by a partition.

[0002]

2. Description of the Related Art When an oil pan is divided into two chambers and the temperature of the oil is low, for example, when the internal combustion engine is started, the oil temperature is quickly increased by closing a partition wall of the two oil chambers to thereby increase the viscosity of the oil. Is known (for example, Japanese Utility Model Laid-Open No. 63-43113,
JP-A-58-2310, etc.). When the temperature of the oil becomes equal to or higher than a predetermined value, the two chambers are communicated with each other.
Suppress oil overheating.

For example, as shown in FIG. 6, an oil pan 91 disclosed in Japanese Utility Model Application Laid-Open No. Sho 58-2310 uses a thermostat for a partition wall 925 that separates a first chamber 921 and a second chamber 922 from each other. A valve 93 that opens and closes in response to the pressure is provided. Then, when the temperature of the oil 81 becomes equal to or higher than a predetermined value, the valve 93 is opened to allow communication between the two chambers 921 and 922. On the other hand, when the temperature of the oil 81 is lower than the predetermined value, the valve 93 is closed to shut off the space between the two chambers 921 and 922, thereby quickly raising the temperature of the oil. In the figure, reference numerals 935 and 936 indicate an oil pipe and a strainer.

The oil pan 95 shown in Japanese Utility Model Laid-Open Publication No. Sho 63-43113 has a first chamber 9 as shown in FIG.
A solenoid valve 96 is provided on a partition 955 separating the first chamber 51 and the second chamber 952.
Is provided. The solenoid valve 96 is a valve which is always open (when not energized) and is connected to a power supply 981 for operation via an oil temperature switch and an ignition switch (not shown). Contact point 982
Is closed and when the contact 983 of the ignition switch is turned on, the two chambers 951 and 952 are shut off. In the figure, reference numeral 97 is a drain plug.

[0005]

[Problems to be solved]
The split type oil pan has the following problems. This is because if the operation is repeated for a short time so that the oil temperature does not become high, the separated chambers will not communicate with each other.
Improper mixing of the oil between the two chambers
That is, the deterioration of the oil in the first chambers 921 and 951 proceeds. In particular, at low temperatures, the problem tends to progress.

In the case of the oil pan 95 disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-43113, the electromagnetic valve 96 opens when the ignition switch is turned off (when the operation is stopped), so that there is no problem at first glance. It seems that at low temperatures the oil viscosity is high and the oils in both chambers do not mix well.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and is intended to appropriately mix oil in both chambers and to unilaterally deteriorate only oil in a first chamber in which an oil pipe is arranged. It is an object of the present invention to provide a two-part oil pan without any problem.

[0008]

According to a first aspect of the present invention, a first partition is provided by a partition wall.
An oil pan for an internal combustion engine divided into a first chamber and a second chamber, wherein a valve for communicating or shutting off between the two chambers is disposed on a partition separating the first chamber and the second chamber; An oil pipe is disposed in the second chamber, and a mixing means for generating a flow in the oil is disposed in the second chamber. The mixing means detects the temperature of the oil and detects whether the internal combustion engine is operating or not, and operates the internal combustion engine. If the temperature of the oil is below a predetermined value, the valve is closed and the mixing means is stopped, and if the internal combustion engine is operating and the temperature of the oil exceeds the predetermined value, The valve is opened and the mixing means is stopped, and if the valve does not open continuously for a predetermined time or more within the integrated time during which the internal combustion engine is operating, the valve is closed for a limited time. Only open the above valve and The mixing means is in the oil pan of an internal combustion engine, characterized in that actuating.

In the present invention, it should be particularly noted that
First, the mixing means for causing the oil to flow in the second chamber is arranged. Second, the valve does not open continuously for a predetermined time or more within the accumulated operating time of the internal combustion engine. In some cases, the valve is opened for a limited time and the mixing means is operated.

That is, in the present apparatus, if the valve between the first chamber and the second chamber is not opened for a predetermined time period in the operating state of the internal combustion engine, the oil in both chambers is properly mixed. If not, open the valve and activate the mixing means. That is, not only the valve is opened but also the mixing means is operated at the same time. As a result, the operation of the mixing means generates a forced oil flow in addition to the natural convection, and the mixing of the oil between the two chambers is strongly promoted.

In other words, in the case of only the operation of opening the valve, mixing of oil at a low temperature is not particularly successful only by mixing oil by natural convection. The flow of the oil is created and the mixing of the oil is strongly promoted even if the oil temperature is low. Therefore, even when the short-time operation in which the oil temperature does not become high is repeated, the problem that only the oil in the first chamber is deteriorated does not occur.

Next, the second invention of the present application is a first invention in which
An oil pan for an internal combustion engine divided into a first chamber and a second chamber, wherein a valve for communicating or shutting off between the two chambers is disposed on a partition separating the first chamber and the second chamber; An oil pipe is disposed in the second chamber, and a mixing means for generating a flow in the oil is disposed in the second chamber. The mixing means detects the temperature of the oil and detects whether the internal combustion engine is operating or not, and operates the internal combustion engine. If the temperature of the oil is below a predetermined value, the valve is closed and the mixing means is stopped, and if the internal combustion engine is operating and the temperature of the oil exceeds the predetermined value, When the internal combustion engine is switched from the operating state to the non-operating state by opening the valve and stopping the mixing means, the valve is opened and a limited time after the switching operation is performed. Only operating the mixing means In the oil pan of the internal combustion engine, it characterized.

The present invention is different from the first invention in that when the internal combustion engine is switched from an operating state to a non-operating state,
The automatic opening of the valve and the activation of the mixing means only for a limited time after the switching operation. Therefore, as in the case of the first invention, even when the short-time operation in which the oil temperature does not rise is repeated, the valve opens and mixes for a certain period of time when the operation of the internal combustion engine is stopped. As the means work and promote oil mixing between the two chambers,
The problem that only the oil in the first chamber deteriorates does not occur.

It is preferable that a plurality of valves are provided on the partition wall, and the mixing means is disposed near some of the valves. By arranging a plurality of valves as described above, oil flows in from one valve and flows out from the other valve.
This is because the mixing of the oil between the two chambers is more efficiently and strongly promoted than when only a single valve is provided (see FIG. 1). This is because in the case of a single valve, the inflow and outflow are performed from a single flow path, so that the mixing between the two chambers is not performed efficiently.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 This embodiment is an oil pan 1 for an internal combustion engine divided into a first chamber 11 and a second chamber 12 by a partition as shown in FIG.
In addition, two valves 21 and 22 (a non-excited valve-open type) are provided in the partition 13 separating the first chamber 11 and the second chamber 12 to communicate or shut off the two chambers 11 and 12. An oil pipe 15 is arranged in the first chamber 11, and a screw 25 as mixing means for causing the oil 81 to flow is arranged near the valve 21 in the second chamber 12.

Also, an oil temperature switch (contact 3
1 ON), the temperature of the oil 81 is detected, and the operation or non-operation of the internal combustion engine is detected by the ignition switch (contacts 321 and 322). In FIG.
Reference numeral 5 denotes a control power supply, and reference numeral 19 denotes a drain plug. When the internal combustion engine is operating (ignition switch contacts 321 on and 322 off) and the oil temperature is below a predetermined value (oil temperature switch contact 31 on), as shown in FIG. The valves 21 and 22 are excited and closed. At this time, the contact 32 of the ignition switch
2 is off, the timer 33 that turns on the contact 331 for a certain time to when the magnet is excited does not operate, and the screw 25 does not operate (first operation mode, see FIG. 2).

On the other hand, when the internal combustion engine is operating (the contact 321 of the ignition switch is turned on) and the temperature of the oil exceeds a predetermined value (the contact 31 of the oil temperature switch is turned off), the excitation is performed by turning off the contact 31. Are released, the valves 21 and 22 are opened. Since the operation state of the timer 33 is not changed, the screw 25 is stopped (second operation mode, see FIG. 3).

Next, when the internal combustion engine is switched from the operating state to the non-operating state (i.e., the contacts 321 are turned off and 322 is turned on), the contacts 321 are turned off, so that the valves 21 and 22 are opened and As described below, the screw 25 is operated only for a limited time to after the switching operation (third operation mode, see FIG. 4).
That is, since the contact 322 is turned on, the timer 33 is operated, the contact 331 is turned on for a predetermined time to, and the screw 25 is operated only during that time.

As described above, according to the present embodiment, even when the operation is repeated for a short time so that the oil temperature does not rise, the operation of the internal combustion engine is stopped as shown in the third operation mode. When the valve 21, 22, 22
Is opened and the screw 25 is actuated, and both chambers 11, 12 are opened.
Since the mixing of the oil 81 is promoted, the problem that only the oil 81 in the first chamber 11 is deteriorated does not occur.

Embodiment 2 This embodiment is another embodiment in which the third operation mode of the first embodiment is replaced with a fourth operation mode described below. That is, in the fourth operation mode, if the valves 21 and 22 do not open continuously for a predetermined time t1 or more within the integrated time during which the internal combustion engine is operating (time t2 when the contact 321 of the ignition switch is turned on), That is, the predetermined time t
If the oil temperature does not rise above the set value within 1, the valve 21 is opened and the screw 25 is operated for a limited time.

That is, the contact 32 of the ignition switch
If the time t obtained by subtracting the time t3 of turning off the contact point 31 of the oil temperature switch from the time t2 of 1 on is equal to or longer than a predetermined time t1, the valve 21 is opened and the screw 25 is opened only for a limited time. Activate FIG. 5 is a flowchart showing the above flow.
The operation times t2 and t3 are integrated at 1 and 602, and at step 603, the difference (t2−t) between the operation times t2 and t3 is calculated.
3) is calculated.

If the result is negative, step 6
01, and if so, at step 604, the valve 2
Steps 605 and 605 operate the screws 25 and
Resets the integration timer for integrating the times t2 and t3. Others are the same as the first embodiment.

As described above, in this embodiment, when the valves 21 and 22 are closed for a long time because the oil temperature does not rise during operation, the valves 21 and 22 are opened. The screw 25 is driven for a predetermined time to mix oil. In this case, means for adjusting the times t2 and t3 and control means for driving the valves 21, 22 and the screw 25 based on the integrated time are required.

[0024]

As described above, according to the present invention, the oils in the two chambers are properly mixed so that only the oil in the first chamber in which the oil piping is arranged is not deteriorated unilaterally.
A split oil pan can be obtained.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a two-part oil pan according to a first embodiment.

FIG. 2 is a sectional view of a two-part oil pan according to the first embodiment (first operation mode).

FIG. 3 is a sectional view of a two-part oil pan according to the first embodiment (second operation mode).

FIG. 4 is a sectional view of a two-part oil pan according to the first embodiment (third operation mode).

FIG. 5 is a flowchart of a fourth operation mode of the two-part oil pan according to the second embodiment.

FIG. 6 is a sectional view (part 1) of a conventional two-part oil pan.

FIG. 7 is a sectional view (part 2) of a conventional two-part oil pan.

[Explanation of symbols]

 11. . . 1st room, 12 . . Second room, 13. . . Partition walls, 21, 22. . . Valve, 25. . . Screw, 81. . . oil,

Claims (3)

[Claims] An oil pan for an internal combustion engine divided into a first chamber and a second chamber by a partition, wherein a valve for communicating or shutting off between the two chambers is provided in a partition separating the first chamber and the second chamber. Is arranged, and an oil pipe is arranged in the first chamber.
The second chamber is provided with mixing means for generating a flow in the oil. The mixing means detects the temperature of the oil, detects whether the internal combustion engine is operating or not, and determines whether the internal combustion engine is operating and the oil temperature is at a predetermined level. If the temperature is equal to or less than the predetermined value, the valve is closed and the mixing means is stopped. If the internal combustion engine is operating and the temperature of the oil exceeds a predetermined value,
Opening the valve and stopping the mixing means,
If the valve does not open continuously for a predetermined time or more within the accumulated time during which the internal combustion engine is operating, open the valve and operate the mixing means only for a limited time. An oil pan for an internal combustion engine. 2. An oil pan for an internal combustion engine which is divided into a first chamber and a second chamber by a partition, wherein the partition separating the first chamber and the second chamber is a valve for communicating or blocking the two chambers. Is arranged, and an oil pipe is arranged in the first chamber.
The second chamber is provided with mixing means for generating a flow in the oil. The mixing means detects the temperature of the oil, detects whether the internal combustion engine is operating or not, and determines whether the internal combustion engine is operating and the oil temperature is at a predetermined level. If the temperature is equal to or less than the predetermined value, the valve is closed and the mixing means is stopped. If the internal combustion engine is operating and the temperature of the oil exceeds a predetermined value,
Opening the valve and stopping the mixing means,
When the internal combustion engine is switched from the operating state to the non-operating state, the valve is opened and the mixing means is operated only for a limited time after the switching operation. Bread. 3. The oil for an internal combustion engine according to claim 1, wherein the partition is provided with a plurality of valves, and the mixing means is disposed near some of the valves. Bread.