JPS5943937A - Variable compression ratio type internal-combustion engine - Google Patents

Abstract

PURPOSE:To prevent generation of knocking due to delay of control to a low compression ratio in the early period of acceleration by decelerating the opening speed of a throttle valve as the operation speed to increase the load onto the accelerator increases, in an engine equipped with a compression ratio changing mechanism which is hydraulically driven. CONSTITUTION:A sub-piston 13 is inserted into a sub-cylinder 11 which communicates to a combustion chamber 5, and said sub-piston is driven hydraulically to vary compression ratio. In such an engine, an operation speed detector 35 is installed onto an accelerating pedal 34, and a signal sent from said detector is inputted into a control circuit 33, and then a throttle valve 9 is controlled through an actuator 32. As the stepping-in speed of the accelerator 34 increases, control is executed so that the opening speed of the throttle valve 9 is gradually reduced with respect to the stepping-in speed. Therefore, by reducing the opening speed of the throttle valve 9 in sharp acceleration, increae of the compression ratio due to delay of retreat of the sub-piston 13 hydraulically driven and generation of knocking due to said increase can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an L variable compression ratio internal combustion engine in which the net stop is changed in accordance with the engine load.

[η Vr that improves output and reduces fuel consumption at the fuel gate
It is good to increase the compression ratio for c, but if the compression ratio is increased, an error will occur in the high negative and odd range. For this reason, in a conventional internal combustion engine with a constant compression ratio, the 1-1-net block must be set to a value that prevents bumps and creases from occurring in the high load range, making it impossible to produce sufficient output in the low load range. Not only is it impossible to do so, but it is also impossible to sufficiently reduce fuel consumption.

Therefore, Japanese Patent Application Laid-Open No. 5,688,926' was published as a prior art. As a result, we proposed that the compression force be made variable by moving the drI rearward using hydraulic pressure.
'1j (/rcRelated patent application (Patent application 1984-4829)
5" 4) In the VC, the compression ratio can be adjusted steplessly by moving the sub-pinut 'J inserted into the sub-silicitor that communicates with the combustion chamber back and forth in proportion to the engine load using the oil field. I suggested making it variable.

However, in this way, the sub-history y of the sub-series J is moved t3rJ @ by the hydraulic pressure according to the load of the engine. Auxiliary screws I for changes in intake air amount due to engine load due to positive response, hydraulic flow, or throttling resistance of each boat type.
Since there is inevitably a response delay of 0 in J's interview ωj, when accelerating by rapidly opening the throttle valve in the 1 m path of intake air to the engine, the compression ratio increases with respect to the increase in the amount of intake air. Control to the low compression ratio will be applied late, and due to the delay in the control to the low compression ratio during acceleration, the
So+, -//:i occurs, and not only does the output decrease, but the driver end tee also decreases.

As described above, the present invention provides the sub-hysteresis 1-
The operating speed of an accelerator operating mechanism such as an accelerator pedal for remotely opening and closing a throttle valve provided in the intake passage to the engine, in which y is controlled by oil 1F depending on the engine load. By detecting this and controlling the opening speed of S0 ''J l-If/i↑ to be slow by the control delay to the compression ratio when this operation speed is high, the knot +-J at the beginning of acceleration is controlled. This prevents the occurrence of damage.

The present invention will be explained below with reference to the drawings of the embodiments. In the figure, [1] id cylinder is connected to the opening, [2+l is to the cylinder, υF, and (3) is the above-mentioned series-J connection to the opening.
The cylinder 1511 slides back and forth in the cylinder bore (4) of 1), and 1511 indicates a combustion chamber formed by folding the lower surface of the cylinder (2) into the cylinder. (5)
K has an ignition plug (6) screwed onto the syringe head (2) located in the middle of the 103, an intake boat (8) with an intake valve (7), and an air port (UL) with an exhaust valve (not shown). ,,Intake hoard f81 K is Nuro Su I-
A 1 m intake path Cl0) with a 1111" valve (9) is connected.

tl] + i is the sub-silicitor drilled in the cylinder head (2), and the sub-silicitor fil) u: The lower side is connected to the combustion chamber (5), and the side is connected to the combustion chamber (5).
) 111 holes each in the upper chamber of the silicon head in i...1. A cover plate (12) is provided at the opening of the auxiliary cylinder (11) to the soil chamber of the silicator to close the opening.

(13) is i[],] The secondary screw h-Jf11) is slidably inserted into the secondary screw series h-Jf11).
At the outer periphery of the screw 1-Sirijig (with the sail 0111, this field 1) Histoco (131 is the 111).When moving 111 in the direction of the Butt chamber (5), the volume of the combustion chamber decreases and the compression I
t becomes high and the secondary screw I-? 7 (13) is the combustion chamber (5)
When you move backwards in the direction of the field +, /', the 'd product of the combustion chamber increases! 4゜reduced'' 7 has become low, and the old Tsukohata li e 7゜1-'J (13) is 1I27
I was forced to move backward at (■5), and the secondary piston y f
On the back side of the combustion chamber f51 (the back side of the combustion chamber f51), there is a stem (f16) extending in the axial direction from the center of the combustion chamber (J3).
I6) is inserted into the cover plate (12i 'x) and protrudes outward, while the secondary cover plate (12i' x 1) freely penetrates and protrudes outward, while there is a pressure of 1El] between the back surface of the secondary cover plate (13) and the cover plate f121. A chamber (1η is formed as T, and the hydraulic pressure chamber (17) is supplied with the actuation/lII from the hydraulic source in a reverse manner by fP (1-f19 with square (18)). , 1 The stem (16) is provided with a passage (20) communicating with the hydraulic chamber f17), and the part where the old stem (16) protrudes from the cover plate (12) is connected to the hydraulic chamber f17). (17) Spill port 1-i2+1 for draining the hydraulic oil inside to the 10th chamber of the cylinder
to be drilled.

(22) shows a Schiller field, which is an example of a Schiller field, and the Schiller field: 17'j (22) is 11''
It is slidably fitted onto the stem (16), and when the piston (22) is moved in the direction of the combustion chamber (5) by K 4fi, the spill point is attached to the piston ring (22). -1-t21) closes and burns Spirulli'Jji (221):
V?c is created so that the spill port 1-j211 opens when the rearward force is applied in the direction away from the chamber (5).

Dimensions. +23+ Q the middle part in the upper chamber of the Siri Jta head
At iHll f241, I set up the old ear 1 blindly in my house.
One force that engages with the self-sleeve series (22), f mountain”: 2:
is connected to a quisset arm mechanism (25), which is one embodiment of an AV controller. Konoya Isefram 41 structure (25)
h, 1iiJ marked bar (23) is connected via lot (26), and Isephum (27) is divided into sections with -d psitaisephram 2゛t□). Taisephram room j281 K (ti,, tiij
au L/bar f23+ (7D curve top "": direction of pushing M toward the lower blade in the figure, twisting spielly-7 42
A spring 12 (11) is provided which urges the Ticephram chamber (27) in the direction of sliding backward.
The intake negative 1
1] Tight room! By introducing 281 K, the intake negative pressure increases toward vacuum as the engine's negative ITF decreases.
J-gu (22) is like an anchor.

And, song 4 self-intake passage flOj K put valve 1~
The actuator 132j for opening and closing the throttle valve (9) is connected to the actuator 132j for opening and closing the throttle valve (9).
The accelerator pedal (341), which is an example of an accelerator operation mechanism, is operated by the accelerator pedal (341). The operation speed detector (35) which is designed to detect the operation speed detector (35) is connected. Aku Seneta [32!
According to f'im, the speed at which the accelerator pedal (: +4) is pressed to negative, l: i increases! 11 - A force that is controlled so that it gradually decreases with respect to the opening speed or depression speed of the throttle valve ↑ (9) as the accelerator pedal (34) is released - the operating speed to the load range For Jst VC, Slo So! - The gas pedal (34) is the gas pedal (34).
It is constructed so that it closes at the same speed as the elongation.

In this configuration, when moving the 7-point (22) in the 5th direction from the position shown by the solid line in Figure 1 to the position 11't shown by the two-dot chain line, Spielbo-1・吃1) By closing the valve, the leakage of 4υJ oil from the 1st nuclear Schilbotle 1) was stopped, and the valve (]8㎽(1kiho 1~(19
) is constantly supplied with hydraulic fluid from the hydraulic chamber (1η), so the sub-hysteresis (13) advances towards the combustion chamber (5) and this forward movement Kaspielbo-1-
When you advance to the opening of +211, Sushi Lupo l-f2
Hydraulic oil starts to flow out from 1), and this flow rate and hydraulic pressure chamber f1
At the point when the supply to 71 is balanced, the secondary hiss 1~=
The forward movement of y (+3) stops. Suntasuji Ruli Jji (
1η is 2((Moving from the 1st place of protection to the backward rotation to the 11th place of the solid line, 1υJj-, Spielbo-1-f2+i
is fully opened (and the amount of flow from the spillover 1 increases and the force of the hydraulic chamber (17) decreases, so the 7th sub-hysteresis (13) increases the pressure in the combustion chamber (5) and /straddle spring f
+5+ +, so it burns: retreats from the room as if it were pushed back, and this retreat is a spill boat 121) is a spill link;
22+ 4 and close and progress, Spillbo-1
- (21: The amount of outflow decreases [-1 When the amount of outflow reaches 7S5 with the supply world, vice-his 1-shi (13)
His retreat was halted, and Spirulli, 17g1
? By the shift U in 2), it is possible to arbitrarily change the secondary hysteresis l-, the place [15' of
) is an example of an actuator by turning the lever (%) on the tie 1 fuflam mechanical disaster! 25) Due to K-related matters,
As the engine load decreases, suction 1. / is negative 1j, and as it gradually becomes more popular toward the vacuum, Spiruri'J rises (tV is +'
Is the king net stop the agency's fault? [The compression ratio of the engine gradually increases as the engine load decreases, and as the engine load increases and the intake negative pressure decreases toward atmospheric pressure, the spill 11'J (22) recedes. Increase in load C
The compression ratio can be automatically controlled in smooth steps (pH 1) according to the engine load Q, so that the compression ratio gradually decreases as the pH increases.

In this case, the actuator that operates (22) and the actuator that operates (22) and the actuator that operates (22) should be limited to the tycephram type (0 [1), but it is of course possible to use an electric type actuator or other type of actuator. However, the engine speed is related to this actuator, and the compression ratio is lowered as the load increases and increased as the rotation speed increases (:11
Sea 1 control is also possible.

Then, when the throttle valve (9) is opened by pressing the accelerator pedal (34), the spill link (22!) retreats as the intake air pressure decreases toward atmospheric pressure, and then the oil pressure Room (17) Sakutsukuji
When the secondary histology (13) retreats as Tl flows out from the spillover 1- (2+1), the secondary histology (13) retreats due to the outflow resistance of the IvJ oil. In this case, when the speed at which the throttle valve is opened is slow, the secondary hysteresis 1 to y (
13) is hardly a problem, but when the opening speed of the throttle valve (9) 2 is fast, the auxiliary screws 1 to 1
:,' Due to the backward delay of f131, the compression ratio exceeds the current limit, resulting in the occurrence of noise.

On the other hand, Kinoe Te 1 uses the accelerator pedal (
An operation origin detector (35) is provided at the accelerator pedal (34) to detect the opening of the throttle valve (9) when the accelerator pedal (34) is depressed. The production process was designed to gradually become slower than the previous one.
As a result of this, when the accelerator pedal (34) is rapidly depressed and applied, the throttle little valve (9) is opened at a slower speed than the accelerator pedal (34) depression speed. By setting the opening speed of the little valve (9) in accordance with the retraction delay of the secondary histone 'J (13) written in ijQ, the retraction of the secondary histone (13) +
1; The I lower net stop at i will no longer exceed the current limit of NO, SO+-J, and the occurrence of knocks due to the delay in control of low compression ratio at the beginning of acceleration of the engine will be prevented. If you release your foot from the accelerator pedal (34), the throttle valve (9) will close at the same speed as the return speed of the accelerator pedal (34).

In this case, engine engine 1l-j: 1. This tends to occur less as the engine speed increases. A signal from the engine rotation processor (36) is input to the control circuit (33), and the opening speed of the throttle valve (9) relative to the depression speed of the accelerator pedal (34) is controlled to increase the engine rotation speed. The rate of change in the amount of intake air due to the opening and closing of the throttle/slot valve (9) will change as the throttle/slot valve (9) closes. The closer the valve is, the higher the power is, and as the throat/little valve (9) is opened, the lower the power becomes. valve(
9) and the position where it starts to open tends to decrease as the thickness increases.
Slower 1 which detects the opening of Slower 1-Lube ↑ (9) is inputted with Signal 5 from the report position meter (37), and the opening of Slower Little valve (9) is determined in response to the depression speed of the accelerator pedal (34). This can be achieved by correcting the speed so that it approaches the depressing speed as the thrower I-L opening position at the beginning of acceleration increases. Alternatively, the control circuit (331K
To input a knock sensor signal (38) to the engine and correct the opening speed of the throttle valve (9) relative to the depression speed of the accelerator pedal (34) so that it approaches the depression speed within the limit where no knots and puffs occur. In this way, by adding corrections based on the engine rotational speed, throttle valve ↑ opening position [l"i', and one or more combinations of knot + blowfish, the throttle rotation speed can be adjusted. This makes it possible to prevent the acceleration response from dropping by 1 degree due to the gradual opening of the valve.

In addition, in the above embodiment, the hydraulic oil supplied to the hydraulic chamber f17) is the lubricating oil in the engine or the self-ilD, 1
The operating song name or white ωJ, j, i4. automatic transmission connection device r1'
You can compose 17 pieces of music, iir
! Example (22) is shown as an example in the Spill book, but as shown in FIG. 3, the stem (16a) is formed into a hollow shaft,
Spill rod (22u) f, 1 sliding 1 white gK fit + j1i L,, M spill rod (22a) in the stem (16a)
It is also possible to open and close the spill port (21a) by sliding it with a related actuator under the load of the engine, and as shown in Figures 4 and 5. Spill port 1'' in stem C161)) is connected to stem (1
6b) inclined sujiruhoto (:
nb) vc 11;j while forming 2 teL (16b
) 171) On the outer periphery, there is a gear-type Spiruri: 7ji (22b
) can be rotated and slid freely ( fitted with
22b) with a bearing (not shown) to the syringe head (2).
One relief boat +39j is bored in this spill ring (22b) so that when the stem (16b) slides back and forth, it coincides with the inclined spill hole (σ). At the same time, this Spirurisig (
22b) The gear (40) on the outer periphery meshes with the rack rod (41) arranged in the curved direction with the gear Δ (16b), and the corresponding rack rod t, 11) is connected to the actuator related to the engine load. (2
5), by sliding the spillover (22b) in the longitudinal direction and rotating the spillover (22b), the inclined spillover 1 of the stem (16b) is rotated.
- The compression ratio may be automatically controlled by shifting the relief boat (39) to the (11 position or ITJ) position relative to (21b).

Although the above embodiment has been described, the unfired FI 11 is constructed by inserting the sub-histograph into the sub-simple connected to the combustion chamber.
The auxiliary screw I-shi is moved forward or backward depending on the oil field depending on the load of the engine.
1-nol fuel engine with variable compression ratio (
At C, a detector for the operating speed of the accelerator operating mechanism that UH closes the throttle valve in the intake passage to the combustion chamber is provided, and the operating speed of the accelerator operating mechanism to increase the load is V. As the time progresses, l[1st slot! The opening speed of the J l-L valve is set to 1 [1] slower than the operating speed specified in 1, and the auxiliary histometer of the variable compression ratio is controlled by oil 113 after nU. In case of movement,
(This occurs due to a delay in controlling the compression ratio to low when the engine is accelerating)
This has the effect that the output will not drop or the driver stability will not be suspended due to the initial acceleration.

[Brief explanation of the drawing]

The drawings have not been released [! Embodiment 11 is shown in which FIG. 1 is a longitudinal sectional front view of the main parts of the engine, FIG. 2 is a front view from Ii-II of FIG. The example diagram, FIG. 5, is a plan view of FIG. 4. (1)...° cylinder block, (2)... cylinder head, (5)... combustion chamber, (8)... intake boat, (10)... intake passage, ( 9)゛°°throttle valve, fll+ =°secondary syringe, (13)...secondary histone, +17)-°°oil factory, +16) (16a)
(16b) ・” Stem, (21) (21a) (2
1b) ”' Spielhort, +22+ (22a)
(22b) -... Spill (/lbef25) °'Atako eta, +32) ′”Aku 1,000 eta, (33)...
・Control circuit, (34)...accelerator pedal, 135)
...Operation speed detector, (361...Rotation sensor month -, +
371"' Throttle rotation meter, C'18)
・°゛no-tsutsa-021b 3B Fig. 4

Claims (1)

[Claims] C1], 11'*: ii't L, the secondary hiss! −
A variable compression ratio internal combustion engine [phantom ((with 0, 0
11. A detector for the operating speed is installed on the width of the accelerator operating device that opens and closes the sud little button in the 1 m path of intake air to the combustion chamber, so that the operating speed for increasing the load of accelerator operation @]^'1 is faster. As it becomes more and more, the compression ratio + 5f variable type, which is characterized by adjusting the opening speed of the 01" slot/sole I-1b valve to be slower than the operating speed of the 01" slot/slot I-1b valve (one row of machines) (2) The opening speed of the throttle/sole box relative to the operating speed is corrected so as to approach the operating speed as the rotational speed of the engine increases. Variable compression ratio internal combustion engine. C3), the opening speed of the throttle valve relative to the operating speed is
A variable compression ratio internal combustion engine according to claim 1, characterized in that as the amount of dust at the beginning of opening of the throttle valves 1 to 1 increases, the operating speed is adjusted in an undesirable manner. C4), the opening speed of the S D-Sol-1 valve relative to the operating speed is determined by the S gate's notsu+shik, which generates a jig.
The variable compression ratio internal combustion engine according to claim 1, wherein the internal combustion engine is modified to approach the operating speed at a lower limit.