JPS62233402A - Lubricant feed device for rotary piston engine - Google Patents

Abstract

PURPOSE:To permit a feed of lubricant of proper quantity without excess or deficiency, by making a correction for increasing the quantity of lubricant to be fed for a prescribed period of time when an accelerating state is detected and stopping the correction for the increase when a decelerating state is detected even if the deceleration is made within the prescribed period of time. CONSTITUTION:When an engine is in operation, a discharge quantity calculation means 36 in a control unit 30 calculates a reference discharge quantity based on the outputs from an air flow meter 31, a rotational speed sensor 32 and an oil temperature sensor 33 and calculates a discharge quantity by correcting the reference discharge quantity using a prescribed correction coefficient. On the other hand, when an acceleration sensor 34 determines that a vehicle is in an accelerating state, a discharge quantity increase correction means 37 makes a correction for increasing a discharge quantity for a prescribed period of time. The step motor 28 of an oil pump is controlled for the prescribed period of time for increasing the discharge quantity for acceleration. However, when a deceleration sensing means senses that the vehicle is in a decelerating state, a deceleration correction means 39 cancels the output from the discharge quantity increase correction means 37.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application by K.) The present invention relates to a lubricating oil supply device for a rotary piston engine, and particularly to a lubricating oil supply device for a rotary piston engine.
It is something to do.

(Prior art) Conventionally, as shown in the Japanese Patent Publication No. 60-60014, lubricating oil has been supplied into the casing through the intake passage in order to lubricate the seal between the inner wall surface of the casing and the rotor in a rotary piston engine. A device is known that is provided with a first oil supply R110 that opens into the intake passage and a second oil supply 1 that opens on the inner circumferential surface of the casing so as to directly supply lubricating al+ into the casing. In such a device, each of the above-mentioned oil supply ports is connected to a metering oil pump via a first lubricating oil supply passage and a second lubricating oil supply passage, and the metering oil pump pumps the oil according to the C1 level of the engine. 1 Suspended lubricating oil is pumped to each oil supply [I and refueled. During acceleration, when the output increases, more lubricating oil is required, and it is desirable to increase the amount of lubricating oil in the oil supply section.

In this case, it is desirable to increase the amount of refueling from the second refueling port, which has particularly good refueling response. In addition, when transitioning from an acceleration state to a steady operation state, it is desirable to maintain the increase correction state for a predetermined period of time, considering that it takes a certain amount of time for the combustion temperature to stabilize.

However, if the oil supply part is increased during acceleration and this state is maintained for a predetermined period of time, when the engine is decelerated immediately after acceleration, ir! I
Even though lubricating oil is not required very much, the amount of lubricating oil is increased during the specified operating time after acceleration, so lr5 lubricating oil may be excessive, especially when short-term acceleration and deceleration are repeated. The problem arises that lubricant consumption increases.

(Object of the Invention) In view of these circumstances, the present invention has been devised so that even when acceleration and deceleration are repeated, R is properly adjusted so as not to cause excess or deficiency.
'+ We provide a lubricating oil supply device for rotary piston engines that can adjust the lubricating oil supply level.

(Structure of the Invention) The present invention provides a first oil supply port opening into the intake passage so as to supply lubricating oil into the casing through the intake passage, and a rotor housing inner periphery of the casing so as to supply lubricating oil directly into the casing. In a rotary piston engine having a second fuel filler port opened on the surface, an acceleration detection means detects an acceleration state of the engine, and a second fuel filler port opens on the right side of the rotary piston engine. an increase correction means for increasing the oil supply RA, a deceleration detection means for detecting the deceleration state of the engine, and a deceleration detection means for detecting the deceleration state of the engine; 1゜With this configuration, the amount of refueling is increased with good responsiveness to meet the demand during acceleration, and acceleration 11> also shifts to a steady operating state. In such a case, the increase correction state is maintained for a predetermined period of time, but when the deceleration state occurs immediately after acceleration, the increase correction is stopped.

(Actual tS Example) Fig. 1 shows an outline of an apparatus according to an embodiment of the present invention. In this figure, 1 is a casing of a rotary piston engine, and a rotor housing 2 with a trochoidal inner peripheral surface 2a on the right side. , and diagonal housings 3 arranged on both sides thereof.

Further, reference numeral 4 denotes a substantially triangular rotor which is supported by an eccentric shaft 5 and rotates within the casing 1 in a star shape, and has three working chambers 6 defined within the casing 1. As the engine rotates, intake, compression, explosion, expansion, and IJI air strokes are performed in sequence.

The rotor 4 has a pex seal 7, a lead seal 8, and a corner seal 9.

1- The casing 1 includes an intake boat 10 that passes through the side housing 3 and opens into the working chamber 6 of the intake stroke, and an exhaust boat 11 that passes through the rotor housing 2 and opens into the working chamber 6 of the air culm. is provided, and the above intake boat 1
An intake passage 12 and a cultivation passage 13 are connected to the air holes 1 to 11, respectively, and a pair of spark plugs 14 are provided at predetermined positions in the rotor housing 2, for example.
).

Further, 15 is a first oil supply port for supplying lubricating oil into the casing 1 through the intake passage 12, and 16 is a second oil supply port for directly supplying lubricating oil into the casing 1. The first oil supply port 15 opens into the intake passage 12 and is connected to the metering oil pump 20 via the first lubricating oil supply passage 17. A second lubricating oil supply passage 18 is provided on the circumferential surface 2a.
It is connected to the metering oil pump 20 via.

Oil supply nozzles 15a and 16a are attached to each oil supply port 15. Yes, the signal from the control unit (ECU) 30
By controlling the metering oil pump 20 via the knob motor 28, the first lubricating oil supply passage 1 is supplied with oil from the first oil supply port 15 (hereinafter referred to as [boat oil supply 1]).
7 and the all lubricant oil discharge Φ to the second lubricant supply passage 18 which is supplied from the second oil supply port 16 (hereinafter referred to as 1.I° direct lubrication). It's starting to look like this. The control unit 30 includes:
The acceleration state of the engine is determined based on an air flow meter 31 that detects the amount of intake air, a rotation speed sensor 32 that detects engine rotation speed, an oil temperature sensor 33 that detects the temperature of lubricating oil, and the detection of intake air pressure. The signals from the acceleration sensor υ34, which detects the opening of the throttle valve, and the throttle opening sensor 35, which detects the opening of the throttle valve, are manually generated. .

2 to 4 show specific examples of the structure of the metering oil pump 20. As shown in FIG. The metering oil pump 20 shown in these figures is used for boat oiling!
i1 711 of lubricant, performs discharge'; 51 plunger 2
1a, a lubricating oil gauge H1 for direct oil supply, and a second plunger 21b for discharging the oil.
The first and second cams 23 adjust the movement stroke of the
a, 231) is on the right. 1-Each Bjinja 21a
, 21b are connected to driving worms 25a, 25 which are connected to the output shaft of the engine in a state in which they are directed toward the control bin 22 by springs 24a, 24b.
While rotating by being driven by the cams 23a and 23b, the lubricating oil is sucked from the suction ports 26a and 26b, and the lubricating oil is sucked from the discharge ports 27a and 27b.
Discharge of lubricating oil to 27b is repeated alternately. The first fj lubricant supply passage 17 is connected to the first oil supply hole 27a corresponding to the first plunger 21a, and the second
The second discharge hole 27b corresponding to the plunger 21b has a second
A lubricating oil supply passage 18 is connected thereto, and as shown in the figure, there are provided two each of first and second opening holes 27a and two second opening holes 27b so as to be applicable to a two-cylinder engine.

The control bin 22 is connected to a step motor 28, and in response to a pulse signal output from the υ control unit 30 to the step motor 28, the control bin 22 is rotated by a rotation angle corresponding to the number of steps of the step motor 28. Each cam 23a is moved.

By displacing 23b, each plunger 21a, 2
1b movement stroke, that is, each discharge port 27a, 27b
11 suspensions per unit rotational speed of the engine are controlled respectively.

Each discharge port 27a corresponds to the number of steps of the step motor 28 (rotation angle of the control bin 22).

The discharge characteristics from the cam 27b are set in advance by the shapes of the cams 23a and 23b. For example, as shown in FIG. While maintaining the discharge part (not shown by the broken line) from the second discharge part 27a to a small 1n, the 111 hanging from the second discharge part 27b for direct oil supply (indicated by the solid line) should be increased or decreased according to the number of pipes mentioned above. is set to . In addition, compared to boat refueling, direct refueling consumes less lubricating oil due to combustion within the working chamber, resulting in better refueling efficiency.
In addition, since the refueling response is good, the discharge section is normally controlled in the area around the A zone, and the increase mit' control described later is performed in this range even during acceleration. Depending on the operating conditions, direct lubrication alone may not be sufficient.
If 3 is insufficient, or if you want to increase the amount of boat lubrication with good lubricant dispersion during cold times, etc. area (B zone) where the discharge part for boat refueling is increased or decreased according to the above number of steps while maintaining Zone) etc. are also f′l
Form each cam 23a, 23b so that J3
All you have to do is go.

As shown in FIG. 6, the control unit 30 includes an air 7
0-meter 31, rotational speed sensor +j32 and oil temperature sensor 33 outputs, and a suspension control means 36 for controlling the discharge part according to the outputs of the 0-meter 31, rotational speed sensor +J32, and oil temperature sensor 33; an increase correction means 37 for increasing the direct oil supply 111 by increasing the discharge part;
Rotation speed sensor +132 and throttle opening sensor +j35
The deceleration detection means 38 detects the deceleration state of the engine based on the n number from the input signal, and the increase correction means 37 is outputting, and the deceleration detection signal from the deceleration detection means 38 is detected by human power n, 'r. , the output of the gift correction means 37 is 1.17.
means 40 for converting the discharge amount determined by these means into the step motor 28 and outputting a corresponding pulse signal to the step motor 28; It is equipped with

FIG. 7C shows a flowchart of control by the control unit 30.1. In this broach 1 sheet, first, in step S1, the intake air amount, engine speed, acceleration signal, throttle opening, and oil temperature are read, and in step S2
In step S3, calculate the basic discharge amount QQ per unit engine rotation speed according to the intake air amount per engine rotation.
Then, in step S4, it is checked whether the acceleration signal is ON or not. When this judgment result is NO (not during acceleration), in step S5, the basic discharge ff3QQ correction coefficient α1 is set to 0 and the mountain (QQXα1) is set to MO.
Then, in step S6, for example, based on the relationship between the discharge amount in the △ zone range in FIG. 1 to control the number of steps of the motor 28
Then, in step $7, a pulse signal corresponding to the number of steps is transmitted, and then the process returns to repeat the process from step S1.

When accelerating when the determination result in step S4 above is YES [
Then, in step S8, an acceleration coefficient α2 for correcting the acceleration increase a is calculated according to the operating state at that time, and in step S9, an acceleration coefficient α2 is calculated based on the basic discharge EQQ, correction coefficient α1, and acceleration coefficient α2. Discharge amount <QQ×α1×α2). Then, the metering oil pump 20 is controlled so that the number of steps corresponding to the above-mentioned discharge is transmitted, and a pulse signal corresponding to the number of steps is transmitted, and the metering oil pump 20 is discharged in accordance with the accelerated and increased discharge 16. (Step 51o-31
2). In this case, the acceleration increase is 3 in the range of A zone in Figure 5.
By doing this, while limiting the discharge 111 for boat refueling, the 1ttl output for direct refueling is increased.

Next, in step 813, it is checked whether the acceleration state is continuing by checking whether the acceleration signal is ON, and when the determination result is NO, it is checked in step S14 whether or not the deceleration signal is ON. . Based on these determinations, if the acceleration state is continuing (the determination result in step S13 is YES)
1), or immediately after acceleration and not in a deceleration state (if the judgment result in step S14 is NO), proceed to step Sm and maintain the acceleration finger state; Based on the determination, step S
14, deceleration (processing to check the number and the judgment result is No.
At this time, the process of maintaining the acceleration increase m state in step S15 is repeated. In addition, when it is determined in step S16 that the predetermined time has elapsed, or when it is determined in step S14 that the vehicle is in a deceleration state, the process of "acceleration increase" and "V state maintenance" is performed (return without 1, 1 According to the above-described control, during acceleration, the oil supply M is increased and corrected to satisfy the water consumption amount by the processing in steps 88 to S12, and in this case, the oil supply amount from the second oil supply port 16 is increased. Therefore, the multiplied T11ifl oil is supplied into the casing 1 with good response.In addition, except when the deceleration state occurs immediately after the end of acceleration, that is, when the acceleration state shifts to the steady operation state, By maintaining the increased M correction state for a predetermined period of time through the processing in steps S+5.8+6, the moisture content can be maintained well until the combustion temperature and the like are satisfied.

On the other hand, when a deceleration state occurs immediately after acceleration, the increase correction is immediately stopped based on the determination in step S14, even if it is within the predetermined time, and the lower three deceleration corrections 11 are It is done. Therefore, as shown in FIG. 8, in the case where the acceleration and deceleration are repeated at different times, if the deceleration correction means 39 is not provided, the increase m signal will be maintained (2).
On the other hand, according to the equipment of the present invention having the deceleration correction means 39, the output of the increase signal and the stop F are repeated according to the acceleration/deceleration. (
solid line Δ), and the oil supply n1 is increased or decreased to correspond to the demand for fuel (solid line B).

In addition, in the above embodiment, the discharge suspension from the second oil outlet 27b of the metering oil pump 20 is increased during acceleration, but the lower stage (which increases the oil supply ff% from the second oil filler port 16)
For example, as shown in FIG. 9, the second
Check the lubricating oil suction by the negative pressure in the working chamber 6 at the oil supply port 16! When the air bleed passage 41 is connected to P, a control valve 42 is provided in this air bleed passage 41, and by controlling this control valve 42 to reduce the amount of air bleed, the air can be removed from the second oil filler port 16. 1, in which case the control valve 42
The control unit 30' outputs a signal for controlling the Luli control valve 42 as described above for a predetermined period of time during acceleration.
What is necessary is to provide a supplementary stage (a) and a deceleration detecting means that outputs this signal by 4v at the time of deceleration.

(Effects of the Invention) As described above, the present invention [Y] When an acceleration state is detected,
Multiplication compensation 1 is performed to increase the amount of oil supplied from the second fuel filler port for a predetermined period of time, but if the vehicle is decelerated even within the predetermined period, the increase correction is avoided. To prevent lubricant supply from increasing unnecessarily when acceleration and deceleration are repeated, while actually preventing lubricant from running out when acceleration is <'E. It is something that can be done.

[Brief explanation of drawings]

Fig. 1 is an overall schematic diagram of an embodiment of the present invention, Fig. 2 is a vertical sectional view of a metering oil pump, Fig.
- Cross-sectional view along line ■, Figure 4 is IV -IV of Figure 2
A sectional view taken along the line, Fig. 5 is a characteristic explanatory diagram of the discharge suspension from each discharge port of the metering oil pump, and Fig. 6 is an it, I
The outline of the I control unit is shown in a sized block diagram, and Fig. 7 shows the flow of control by the upper control unit t-1-1. Fig. 8 shows the control t211 operation when acceleration and deceleration are repeated and the corresponding 1I71 slide. FIG. 9 is a time chart showing changes in oil supply tension, and is a schematic diagram of the main parts of another embodiment. 1...Casing, 2...〇-tahousing, 4.
... Rotor, 12... Intake passage, 15... First oil filler port, 16... Second oil filler port, 20... Metering oil pump, 30... Control unit, 34... Acceleration Sensor, 37...Masui correction means, 38...Deceleration detection means, 39...Deceleration correction means. Patent applicant Mazda Co., Ltd. Agent
Patent Attorney Etsushi Kotani Patent Attorney
Long 1) Semukai Patent Attorney Yasuo Itaya Figure 2 Figure 3 Figure 4 Figure 5 (Control 1r rotation angle) Figure 8 B! question

Claims (1)

[Claims] 1. A first oil supply port opened in the intake passage so as to supply lubricating oil into the casing through the intake passage, and a second oil supply port opened on the inner peripheral surface of the rotor housing of the casing so as to supply lubricant oil directly into the casing. In the rotary piston engine, the rotary piston engine has an acceleration detection means for detecting an acceleration state of the engine, and an increase correction means for increasing the amount of oil supplied from the second oil filler port for a predetermined period of time during acceleration detected by the acceleration detection means. a deceleration detection means for detecting a deceleration state of the engine; and a deceleration correction means for canceling the output of the increase correction means when the increase correction means is outputting and a deceleration signal is input from the deceleration detection means. A lubricating oil supply device for a rotary piston engine, characterized in that: