JP2004308631A - Scotch yoke type engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scotch yoke type engine capable of suppressing vibration even if it is a multiple cylinder engine. <P>SOLUTION: The scotch yoke type engine has three yokes 21-23, and four pistons 1-12 are attached in each yoke. Furthermore, yokes 21-23 are attached to crank pins 31-33 provided in a crankshaft 30 respectively, and the crank pins 31-33 are arranged at 120-degree intervals, which is a vibration offset angle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a Scotch yoke engine.
[0002]
[Prior art]
As an engine used for an automobile or the like, there is a scotch yoke engine using a scotch yoke mechanism in addition to an engine using a general piston and a crankshaft. The scotch yoke engine has a yoke body having a pair of connecting rods (hereinafter, referred to as “yoke”) and having an elongated hole formed perpendicular to the direction in which the yoke extends. An eccentric crankshaft is inserted into the elongated hole, and a mechanism is provided for reciprocating the crankpin while rolling in the elongated hole. In this scotch yoke engine, the yoke connected to the crankshaft only reciprocates, so that interference between the yoke and the cylinder bore wall skirt portion is eliminated, so that the distance between the crankshaft and the piston can be shortened. Among such scotch yoke type engines, there is an engine having four yokes, for example, one disclosed in DE 10107921 A1.
[0003]
This scotch yoke engine has two cylinders provided adjacent and parallel to each other, and two cylinders provided adjacent and parallel to each other at a position facing the two cylinders. Further, the Scotch yoke engine has a yoke main body having four yokes to which these four cylinders are respectively attached with four pistons provided reciprocally. Further, a long hole is formed in the yoke main body, and a crankshaft serving as an output shaft is inserted eccentrically into the long hole. Then, a normal engine cycle is sequentially performed in each cylinder, whereby the yoke main body is reciprocated to rotate the crankshaft.
[0004]
[Patent Document 1]
German Patent Application No. 10107921
[0005]
[Problems to be solved by the invention]
The Scotch yoke engine disclosed in Patent Document 1 is a four-cylinder engine. On the other hand, it is conceivable to manufacture a multi-cylinder Scotch-yoke engine such as an eight-cylinder, a twelve-cylinder, a sixteen-cylinder, and a twenty-four-cylinder using a plurality of yokes in order to improve the performance. In this regard, it is conceivable to connect a plurality of yokes to a plurality of crankpins in the scotch yoke type engine described in Patent Document 1, but simply arranging the yokes may increase engine noise and vibration. There was a problem.
[0006]
Therefore, an object of the present invention is to provide a Scotch yoke engine capable of suppressing vibration and the like even in a multi-cylinder system such as a 12-cylinder or 16-cylinder engine.
[0007]
[Means for Solving the Problems]
A scotch yoke engine according to the present invention that has solved the above-described problems is provided with a first cylinder and a second cylinder that are provided adjacent to and parallel to each other, and provided at a position facing the first cylinder and the second cylinder, and are adjacent to each other. And the third cylinder and the fourth cylinder provided in parallel, and the first piston, the second piston, the third piston, and the fourth piston provided to be able to reciprocate from the first cylinder to each of the fourth cylinder, A yoke that includes four yoke elements each provided with a first piston to a fourth piston, and transmits a reciprocating motion of each piston to a crankpin of a crankshaft. Connected to the crankshaft, spaced apart in the axial direction of the crankshaft, Crank pin between the angle between the Kupyn is one that is set in vibration cancellation angle.
[0008]
In the scotch yoke engine according to the present invention, the plurality of yokes are connected to the crankshaft via the crankpins, and the crankpins to which these yokes are attached are set at the vibration canceling angle. For this reason, the reciprocating inertial force of the piston attached to the yoke and the cylinder in which they reciprocate can be offset, so that the reciprocating inertial force in the axial direction of the cylinder, that is, in the direction orthogonal to the crankshaft, is reduced or eliminated. be able to. The term "vibration canceling angle" as used in the present invention refers to an angle at which vibrations caused by reciprocation of a piston can be mutually canceled by a plurality of yokes. The specific angle is determined by factors such as the number of yokes.
[0009]
Further, the ignition plugs corresponding to the respective pistons provided on the plurality of yokes sequentially ignite, and the time during which the crankshaft rotates by the vibration canceling angle and the ignition timing of the sequentially ignited ignition plugs are synchronized. It is preferable to use an embodiment.
[0010]
In this way, the synchronization between the ignition timing of the spark plug and the time during which the crankshaft rotates by the vibration canceling angle allows the vibration to be more appropriately canceled.
[0011]
Furthermore, it is preferable that the plurality of yokes are arranged so as to be line-symmetric with respect to a straight line along a direction orthogonal to the axial direction of the crankshaft with respect to the axis of symmetry.
[0012]
In this way, by making the plurality of yokes symmetrical with respect to the straight line along the direction orthogonal to the axial direction of the crankshaft, the moment generated by the reciprocating motion of the piston can be appropriately canceled. be able to.
[0013]
Further, the plurality of yokes are composed of three yokes, a first yoke, a second yoke, and a third yoke, and the first yoke is attached to the first yoke and the second yoke is attached to the second yoke. The angle between the pins may be set to 120 degrees, and the angle between the crankpins of the second crankpin attached to the second yoke and the third crankpin attached to the third yoke may be set to 120 degrees. .
[0014]
Thus, when there are three yokes, it is preferable to set the vibration canceling angle to 120 degrees.
[0015]
Further, the plurality of yokes include four yokes, a first yoke, a second yoke, a third yoke, and a fourth yoke, and a first crank pin attached to the first yoke and a second crank attached to the second yoke. The angle between the crankpin and the crankpin is set to 90 degrees, the angle between the second crankpin attached to the second yoke and the third crankpin attached to the third yoke is set to 90 degrees, and the third yoke is set. The angle between the crankpins of the third crankpin attached to the fourth yoke and the fourth crankpin attached to the fourth yoke may be set to 90 degrees.
[0016]
The plurality of yokes are composed of four yokes, a first yoke, a second yoke, a third yoke, and a fourth yoke. The first yoke is attached to the first yoke, and the second yoke is attached to the second yoke. The angle between the crankpin and the crankpin is set to 90 degrees, the angle between the second crankpin attached to the second yoke and the third crankpin attached to the third yoke is set to 45 degrees, and the third yoke is set. The angle between the crankpins of the third crankpin attached to the fourth yoke and the fourth crankpin attached to the fourth yoke may be set to 90 degrees.
[0017]
And a plurality of yokes are comprised of six yokes, a first yoke, a second yoke, a third yoke, a fourth yoke, a fifth yoke, and a sixth yoke, and a first crank pin attached to the first yoke, The angle between the crank pin and the second crank pin attached to the second yoke is set to 120 degrees, and the angle between the crank pin between the second crank pin attached to the second yoke and the third crank pin attached to the third yoke is 120 degrees. Degrees, the fourth crankpin attached to the fourth yoke, the angle between the crankpins of the fifth crankpin attached to the fifth yoke is set to 120 degrees, the fifth crankpin attached to the fifth yoke, The angle between the crankpin and the sixth crankpin attached to the six yokes is set to 120 degrees. And it can also be.
[0018]
Thus, when the number of yokes is four or six, it is preferable to set the vibration canceling angle to the above angle.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In each embodiment, the same reference numerals are given to portions having the same function, and overlapping description may be omitted.
[0020]
FIG. 1 is a perspective view of a main part of a scotch yoke engine according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of a yoke in the scotch yoke engine. As shown in FIG. 1, the Scotch yoke engine M according to the present embodiment is a so-called 4-cycle 12-cylinder engine, and includes three yokes, a first yoke 21, a second yoke 22, and a third yoke 23. Have. The first piston 1, the second piston 2, the third piston 3, and the fourth piston 4 are attached to the first yoke 21 among them. The second yoke 22 is provided with a fifth piston 5, a sixth piston 6, a seventh piston 7, and an eighth piston 8. Further, the ninth piston 9, the tenth piston 10, the eleventh piston 11, and the twelfth piston 12 are attached to the third yoke 23.
[0021]
As shown in FIG. 2, the first yoke 21 is provided with four yoke elements 21A, 21B, 21C, and 21D. The first yoke 21 includes the first yoke element 21A and the second yoke element 21A. The yoke elements 21B are provided adjacent to and parallel to each other. Further, a third yoke element 21C and a fourth yoke element 21D are provided adjacent to and parallel to each other. Further, a third yoke element 21C and a fourth yoke element 21D are provided at positions facing the first yoke element 21A and the second yoke element 21B.
[0022]
Rails 21E are formed between the first yoke element 21A and the second yoke element 21B, and between the third yoke element 21C and the fourth yoke element 21D. The rail 21E is formed along a direction orthogonal to the reciprocating direction of the first yoke 21, and a slider 21F to which a first crankpin 31 provided on a crankshaft 30 is attached is inserted into the rail 21E. ing. The first crankpin 31 is formed at a position eccentric from the axis of the crankshaft 30. When the first yoke 21 reciprocates, the slider 21F moves along the rail 21E and the slider 21F moves. As a result, the crankshaft 30 rotates.
[0023]
Further, first to fourth pistons 4 are attached to the distal ends of the yoke elements 21A to 21D, respectively. These first to fourth pistons 4 are arranged in the reciprocating direction of the first yoke 21. Thus, on the left side of the first yoke 21, the first piston 1 and the second piston 2 are arranged, and on the right side, the third piston 4 and the fourth piston 4 are arranged.
[0024]
The second yoke 22 has a configuration similar to that of the first yoke 21 and has fifth to eighth yoke elements 22A to 22D. An eighth piston 8 is mounted. A rail 22E is formed on the second yoke 22, and is connected to a second crankpin 32 provided on the crankshaft 30 via a slider 22F. Thus, the fifth piston 6 and the sixth piston 6 are arranged on the left side of the second yoke 22, and the seventh piston 8 and the eighth piston 8 are arranged on the right side.
[0025]
Further, the third yoke 23 has a configuration similar to that of the first yoke 21 and has ninth yoke elements 23A to twelfth yoke elements 23D, and each of the yoke elements 23A to 23D has a ninth yoke element 23A to 23D. The piston 9 to the twelfth piston 12 are mounted. A rail 23E is formed on the third yoke 23, and is connected to a third crankpin 33 provided on the crankshaft 30 via a slider 23F. Thus, the ninth piston 9 and the tenth piston 10 are arranged on the left side of the third yoke 23, and the eleventh piston 11 and the twelfth piston 12 are arranged on the right side.
[0026]
Further, as schematically shown in FIG. 3, the first crank pin 31, the second crank pin 32, and the third crank pin 33 provided on the crank shaft 30 are arranged at equal intervals in the axial direction of the crank shaft 30. And are spaced apart. The angle between the crank pins between the crank pins 31 to 33 is set to the vibration canceling angle. In the present embodiment, specifically, the angle between the crankpins between the first crankpin 31 and the second crankpin 32 is 120 degrees, and the angle between the crankpins between the second crankpin 32 and the third crankpin 32 Is set to 120 degrees. The angle between the crank pins between the third crank pin 33 and the first crank pin 31 is also 120 degrees, and the angles between the crank pins are distributed so as to be equal.
[0027]
Further, a cylinder head (not shown) is formed with first to twelfth cylinders in which the pistons 1 to 12 are fitted respectively and reciprocate. The first cylinder in which the first piston 1 reciprocates and the second cylinder in which the second piston 2 reciprocates are formed adjacent to and parallel to each other. A third cylinder in which the third piston 3 reciprocates and a fourth cylinder in which the fourth piston 4 reciprocates; a fifth cylinder in which the fifth piston 5 reciprocates and a sixth cylinder in which the sixth piston 6 reciprocates; The seventh cylinder in which the seventh piston 7 reciprocates and the eighth cylinder in which the eighth piston 8 reciprocates are formed adjacent to each other and parallel to each other. Further, the ninth cylinder in which the ninth piston 9 reciprocates and the tenth cylinder in which the tenth piston 10 reciprocates, the eleventh cylinder in which the eleventh piston 11 reciprocates, and the tenth cylinder in which the twelfth piston 12 reciprocates. The twelve cylinders are formed adjacent to each other and parallel to each other.
[0028]
The first to twelfth pistons 12 and the first to twelfth cylinders in which they reciprocate form first to twelfth cylinders, respectively. Each of the first to twelfth cylinders is provided with a spark plug (not shown) that ignites during a combustion stroke in an engine cycle.
[0029]
The operation and operation of the scotch yoke engine according to the embodiment having the above-described configuration will be described. In the Scotch yoke engine M according to the present embodiment, each of the pistons 1 to 12 and each of the pistons 1 to 12 reciprocates and enters and exits the cylinder, so that each of the suction process, the compression process, the combustion process, and the exhaust process is performed. Circulate the engine process.
[0030]
The scotch yoke engine M according to the present embodiment has twelve pistons 1 to 12, but each of the pistons goes through a combustion stroke once while the crankshaft 30 makes two revolutions, so that the ignition cylinder and It is set to be. FIG. 4 shows the relationship between the crank angle when the crankshaft 30 rotates and the ignition cylinder in the combustion stroke where ignition is performed by the spark plug. In the scotch yoke engine M according to the present embodiment, the ignition cylinder moves so that the ignition cylinder sequentially ignites each time the crankshaft 30 rotates 60 degrees. As described above, the time during which the crankshaft 30 rotates by 60 degrees is synchronized with the ignition timing of the spark plug that sequentially ignites.
[0031]
First, when the crank angle is 0 degrees, the first cylinder becomes the ignition cylinder, and when the crank angle is 60 degrees, the ninth cylinder becomes the ignition cylinder. Thereafter, every time the crank angle rotates 60 degrees, the seventh cylinder, the third cylinder, the eleventh cylinder, the fifth cylinder, the second cylinder, the tenth cylinder, the eighth cylinder, the fourth cylinder, the twelfth cylinder, After moving in the order of the sixth cylinder, and after the crankshaft 30 has rotated 720 degrees, in other words, two rotations, the ignition cylinder returns to the first cylinder. Thereafter, the ignition cylinder moves in the same process.
[0032]
When the movement of the ignition cylinder is viewed from the viewpoint of the movement of the yoke including the ignition cylinder, the yoke including the ignition cylinder moves in the order of the first yoke 21, the third yoke 23, and the second yoke 22. Further, considering the left and right sides of the yoke, the left side of the first yoke 21, the left side of the third yoke 23, the right side of the second yoke 22, the right side of the first yoke 21, the right side of the third yoke 23, the second yoke The position of the ignition cylinder moves in the order of the left side of 22. In this way, the movement of the ignition cylinder cancels out the component in the cylinder axis direction (the direction orthogonal to the crankshaft 30) of the reciprocating inertial force generated by each of the pistons 1 to 12 and each cylinder. FIG. 5 shows the relationship between the crank angle when the left and right directions of the reciprocating inertia force are positive and the right direction are negative, the reciprocating inertia force generated in each crank pin, and the total value of the reciprocating inertia forces. It is a graph. As shown in FIG. 5, when the crank angle is 0 degrees, the reciprocating inertia force is 0 at the first crank pin 31 to which the first yoke 21 is attached. The reciprocating inertia force of the second crank pin 32 to which the second yoke 22 is attached is +0.67. Further, the reciprocating inertia force of the third crank pin 33 to which the third yoke 23 is attached is -0.67. Here, the reciprocating inertial force is set to 1 as the maximum value of the absolute value of the reciprocating inertial force applied to each of the crank pins 31 to 33.
[0033]
Then, when the reciprocating inertial forces applied to these crank pins 31 to 33 are totaled, the total of the reciprocating inertial forces becomes zero. Thereafter, as the crankshaft 30 rotates, the reciprocating inertial force applied to each of the crankpins 31 to 33 changes as shown in FIG. 5, but their sum always becomes zero. In this way, by canceling the reciprocating inertial force applied to each of the crank pins 31 to 33, the total reciprocating inertial force can always be set to zero. Here, in the Scotch yoke type engine as in this embodiment, when the crankshaft rotates at a constant speed, the piston moves so as to completely draw a sine wave. For this reason, no harmonic component is generated at all, and an extremely quiet engine can be constructed in combination with a small ignition interval.
[0034]
As described above, according to the Scotch yoke engine M according to the present embodiment, the vibration in the axial direction of the cylinder due to the reciprocation of the piston can be offset, so that such vibration and noise can be suitably suppressed. Can be.
[0035]
In the above-described embodiment, three yokes are used. However, a 24-cylinder having six yokes in which a yoke symmetrical to the three yokes is arranged with an axis orthogonal to the crankshaft as a symmetry axis. A Scotch yoke engine can also be used. In this scotch yoke engine, the ignition timings of the spark plugs are moved in the order shown in the above embodiment so as to be symmetrical via the axis of symmetry. The use of such a 24-cylinder engine can also cancel the moment generated on the crankshaft. Therefore, the generation of vibration can be more suitably suppressed.
[0036]
Further, in the above-described embodiment, a 12-cylinder or 24-cylinder engine has been described. However, for example, a Scotch-yoke engine such as a 16-cylinder using four yokes may be used. When four cylinders are used to configure a 16-cylinder engine, it is conceivable to set the ignition timing at equal intervals of 45 degrees in order to minimize torque fluctuations. For this purpose, since the ignition is performed at an interval of 180 degrees per one yoke, two sets of two yokes arranged at an interval of 90 degrees are prepared, and these are configured as a crankpin arranged so as to be shifted from each other by 45 degrees. Will be. This combination is considered in four ways, and the arrangement is shown in FIGS. 6A, 7A, 8A, and 9A, respectively. A simulation was performed on the reciprocating inertial force of the piston for these combinations.
[0037]
In the following examples, the first to fourth pistons 4 to 4 are provided on the first yoke, and the fifth to eighth pistons 8 are mounted on the second yoke. The ninth piston 9 to the twelfth piston 12 are attached to the third yoke, and the thirteenth piston 13 to the sixteenth piston 16 are attached to the fourth yoke. The first to fourth yokes are attached to the first to fourth crankpins, which are provided at equal intervals in the axial direction of the crankshaft in this order.
[0038]
First, as shown in FIG. 6A, when the crank angle is 0 degree, the first to fourth pistons 4 are arranged at 0 degrees. Further, the fifth piston 5 to the eighth piston 8 are at the position of 90 degrees, the ninth piston 9 to the twelfth piston 12 are at the position of 45 degrees, and the thirteenth piston 13 to the sixteenth piston 16 are at the position of 135 degrees. Position. The change of the reciprocating inertia force with the change of the crank angle at that time was simulated. As a result, as shown in FIG. 6B, a reciprocating inertia force of a maximum of 2.61 was generated.
[0039]
Similarly, as shown in FIG. 7A, when the crank angle is 0 degrees, the first to fourth pistons 4 are arranged at 0 degrees. Also, the fifth piston 5 to the eighth piston 8 are at the position of 90 degrees, the ninth piston 9 to the twelfth piston 12 are at the position of 135 degrees, and the thirteenth piston 13 to the sixteenth piston 16 are at the position of 225 degrees. Position. The change of the reciprocating inertia force with the change of the crank angle at that time was simulated. As a result, as shown in FIG. 7B, a reciprocating inertia force of 1.081 at maximum was generated.
[0040]
Further, as shown in FIG. 8A, when the crank angle is 0 degrees, the first to fourth pistons 4 are arranged at 0 degrees. Also, the fifth piston 5 to the eighth piston 8 are at the position of 90 degrees, the ninth piston 9 to the twelfth piston 12 are at the position of 135 degrees, and the thirteenth piston 13 to the sixteenth piston 16 are at the position of 225 degrees. Position. The change of the reciprocating inertia force with the change of the crank angle at that time was simulated. As a result, as shown in FIG. 6B, a reciprocating inertia force of 1.081 at maximum was generated.
[0041]
Then, as shown in FIG. 9A, when the crank angle was 0 degree, the first to fourth pistons 4 were arranged at 0 degrees. Further, the fifth piston 5 to the eighth piston 8 are at the position of 90 degrees, the ninth piston 9 to the twelfth piston 12 are at the position of 45 degrees, and the thirteenth piston 13 to the sixteenth piston 16 are at -45 degrees. Respectively. The change of the reciprocating inertia force with the change of the crank angle at that time was simulated. As a result, as shown in FIG. 6B, a reciprocating inertia force of a maximum of 2.61 was generated.
[0042]
From this result, in the case of a 16-cylinder Scotch yoke engine using four yokes, the angle between the first and second crankpins is set to 90 degrees, and the second crankpin is It can be seen that it is preferable that the angle between the third and fourth crankpins is set to 45 degrees, and the angle between the third and fourth crankpins is set to 90 degrees.
[0043]
As shown in FIG. 10A, four crankpins are arranged at 180-degree intervals, and the first to fourth pistons 4 and the thirteenth to thirteenth pistons 13 to 16 are connected to each other. The fifth to eighth pistons 8 and the ninth to twelfth pistons 12 may be arranged at the 180-degree positions at the respective degrees. With such an arrangement, although the ignition timing by the spark plug becomes coarse at intervals of 180 degrees, the reciprocating inertial force in the cylinder axis direction can be offset.
[0044]
Further, the first to fourth crankpins may be arranged at 90-degree intervals, and the first to fourth yokes may be attached to the respective crankpins. In such a case, as shown in FIG. 11, the reciprocating inertial force generated in each crankpin is canceled, and the total can be set to zero.
[0045]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a Scotch yoke engine that can suppress vibration and the like even in a multi-cylinder such as a 12-cylinder or a 16-cylinder.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part of a scotch yoke engine.
FIG. 2 is an exploded perspective view of a yoke in the Scotch yoke engine.
FIG. 3 is a diagram schematically showing a relationship between a crankshaft and an angle between crankpins of each crankpin.
FIG. 4 is a diagram showing a relationship between a crank angle when a crankshaft 30 rotates and an ignition cylinder in which ignition is performed by a spark plug.
FIG. 5 shows the relationship between the crank angle when the left and right directions of the reciprocating inertia force are positive and the right direction are negative, the reciprocating inertia force generated in each crankpin, and the total value of the reciprocating inertia forces. It is a graph.
6A is a diagram showing a relationship between each piston and a crank angle, and FIG. 6B is a diagram showing a relationship between a reciprocating inertial force generated in each crankpin and a total value of the reciprocating inertial forces. It is a graph.
7A is a diagram showing a relationship between pistons and crank angles arranged differently from FIG. 6, and FIG. 7B is a diagram showing a reciprocating inertia force generated at each crankpin, and a sum of the reciprocating inertia forces. It is a graph which shows the relationship with a value.
8A is a diagram showing a relationship between each piston and a crank angle arranged differently from FIG. 6; FIG. 8B is a diagram showing a reciprocating inertia force generated at each crank pin; It is a graph which shows the relationship with a total value.
9A is a diagram showing a relationship between each piston and a crank angle arranged differently from FIG. 6; FIG. 9B is a diagram showing a reciprocating inertia force generated in each crank pin, It is a graph which shows the relationship with a total value.
10A is a diagram showing a relationship between each piston and a crank angle arranged differently from FIG. 6; FIG. 10B is a diagram showing a reciprocating inertia force generated in each crank pin, It is a graph which shows the relationship with a total value.
11 is a graph showing a relationship between a reciprocating inertia force generated in each crankpin in a relationship between each piston and a crank angle arranged differently from FIG. 6, and a total value of the reciprocating inertia forces.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... 1st piston, 2 ... 2nd piston, 3 ... 3rd piston, 4 ... 4th piston, 5 ... 5th piston, 6 ... 6th piston, 7 ... 7th piston, 8 ... 8th piston, 9 ... Ninth piston, 10 ... tenth piston, 11 ... eleventh piston, 12 ... twelfth piston, 13 ... thirteenth piston, 16 ... sixteenth piston, 21 ... first yoke, 21A-21D, 22A- 22D, 23A to 23D: yoke element, 21E, 22E, 23E: rail, 21F, 22F, 23F: slider, 22: second yoke, 23: third yoke, 30: crankshaft, 31: first crankpin, 32 … Second crankpin, 33… third crankpin, M… Scotch yoke engine.

Claims (7)

A first cylinder and a second cylinder which are provided adjacent and parallel to each other, and a third cylinder and a fourth cylinder which are provided at positions facing the first cylinder and the second cylinder and which are provided adjacent and parallel to each other. A cylinder, a first piston, a second piston, a third piston, and a fourth piston, which are provided to be able to reciprocate from the first cylinder to the fourth cylinder, and the fourth piston from the first piston, respectively. A yoke that includes four yoke elements and transmits the reciprocating motion of each piston to a crankpin of a crankshaft.
The plurality of yokes are separated from each other in the axial direction of the crankshaft and connected to the crankshaft,
A scotch yoke engine, wherein an angle between crank pins between the crank pins to which the plurality of yokes are attached is set to a vibration canceling angle. Spark plugs corresponding to the pistons provided on the plurality of yokes sequentially ignite,
2. The Scotch yoke engine according to claim 1, wherein a time during which the crankshaft rotates by the vibration canceling angle and an ignition timing of the sequentially ignited spark plug are synchronized. The Scotch yoke engine according to claim 1 or 2, wherein the plurality of yokes are arranged to be line-symmetric with respect to a straight line along a direction orthogonal to the axial direction of the crankshaft. The plurality of yokes are composed of three yokes, a first yoke, a second yoke, and a third yoke,
The first crankpin attached to the first yoke and the angle between the crankpins of the second crankpin attached to the second yoke are set to 120 degrees,
The Scotch yoke engine according to claim 1 or 2, wherein the angle between the crankpins of the second crankpin attached to the second yoke and the third crankpin attached to the third yoke is set to 120 degrees. . The plurality of yokes are composed of four yokes, a first yoke, a second yoke, a third yoke, and a fourth yoke,
The first crankpin attached to the first yoke and the angle between the crankpins of the second crankpin attached to the second yoke are set to 90 degrees,
The second crankpin attached to the second yoke, the angle between the crankpin of the third crankpin attached to the third yoke is set to 90 degrees,
The Scotch yoke engine according to claim 1 or 2, wherein an angle between crank pins between a third crank pin attached to the third yoke and a fourth crank pin attached to the fourth yoke is set to 90 degrees. . The plurality of yokes are composed of four yokes, a first yoke, a second yoke, a third yoke, and a fourth yoke,
The first crankpin attached to the first yoke and the angle between the crankpins of the second crankpin attached to the second yoke are set to 90 degrees,
A second crankpin attached to the second yoke and an angle between crankpins of the third crankpin attached to the third yoke are set to 45 degrees,
The Scotch yoke engine according to claim 3, wherein the angle between the crankpins of the third crankpin attached to the third yoke and the fourth crankpin attached to the fourth yoke is set to 90 degrees. The plurality of yokes are composed of six yokes, a first yoke, a second yoke, a third yoke, a fourth yoke, a fifth yoke, and a sixth yoke,
The first crankpin attached to the first yoke and the angle between the crankpins of the second crankpin attached to the second yoke are set to 120 degrees,
A second crankpin attached to the second yoke and an angle between crankpins of the third crankpin attached to the third yoke are set to 120 degrees,
A fourth crankpin attached to the fourth yoke and an angle between the crankpins of the fifth crankpin attached to the fifth yoke are set to 120 degrees,
4. The scotch yoke engine according to claim 3, wherein an angle between crank pins of a fifth crank pin attached to the fifth yoke and a sixth crank pin attached to the sixth yoke is set to 120 degrees. 5.

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