阅读说明：本技术 内燃机可变活塞行程可变压缩比机构及控制方法 (Variable piston stroke and variable compression ratio mechanism of internal combustion engine and control method ) 是由 效俊林 于 2021-01-24 设计创作，主要内容包括：本发明涉及内燃机领域,具体涉及一种内燃机可变活塞行程可变压缩比的机构及控制方法。本发明的具体技术方案如下：活塞连杆与曲轴曲柄杠杆连杆上的铰接部装配有移位机构,移位机构是为了改变了施力点位置,因此曲轴曲柄杠杆连杆的动力臂一端得到了延长,杠杆越长曲轴曲柄受力点得到的力矩越大,与此同时活塞行程加长压缩比增大,使内燃机获得更大的扭矩输出,当活塞连杆与曲轴曲柄杠杆连杆的铰接部施力点向曲轴曲柄方向移动后,使曲轴曲柄杠杆连杆的动力臂一端的杠杆缩短,同时活塞行程缩小,而曲轴曲柄杠杆连杆动力臂一端的杠杆长度和活塞行程的距离是内燃机能够输出多大扭矩的关键。(The invention relates to the field of internal combustion engines, in particular to a mechanism with a variable piston stroke and a variable compression ratio of an internal combustion engine and a control method. The specific technical scheme of the invention is as follows: the displacement mechanism is assembled on the hinged part of the piston connecting rod and the crankshaft crank lever connecting rod, and is used for changing the position of a force application point, so that one end of a power arm of the crankshaft crank lever connecting rod is prolonged, the moment obtained by the stress point of the crankshaft crank is larger as the lever is longer, and simultaneously the piston stroke is prolonged and the compression ratio is increased, so that the internal combustion engine obtains larger torque output.)

1. The utility model provides a variable piston stroke variable compression ratio's of internal-combustion engine mechanism and control method, includes piston (1), piston connecting rod (2), shifting mechanism (3), shifting mechanism drive arrangement (4), dynamic balance piece (5), bent axle crank lever connecting rod (6), bent axle crank (7), swing connecting rod (8), cylinder body articulated portion (9), aggregate unit (10), constitutes variable piston stroke variable compression ratio mechanism of internal-combustion engine, its characterized in that: the shifting mechanism (3) is assembled at the hinged part of the piston connecting rod (2) and the crankshaft crank lever connecting rod (6), the linkage device (10) assembled on the shifting mechanism (3) is assembled with the dynamic balance block (5) at one side in a linkage way, and the other side of the shifting mechanism (3) is assembled with the power output end of the shifting driving device (4) in a linkage way.

2. The variable piston stroke variable compression ratio internal combustion engine mechanism according to claim 1, characterized in that: crankshaft crank lever connecting rod (6), the power arm one end of crankshaft crank lever connecting rod (6) is articulated with piston connecting rod (2), articulated portion is equipped with displacement mechanism (3), the other end and swing connecting rod (8) of crankshaft crank lever connecting rod (6) are articulated, the other end and the articulated portion of cylinder body (9) of swing connecting rod (8) are articulated, articulated portion of cylinder body (9) and cylinder body fixed Assembly, the crank pilot hole assembly on crankshaft crank lever connecting rod (6) is on crankshaft crank (7), be equipped with on crankshaft crank lever connecting rod (6) and shift drive arrangement (4), be located one side of crankshaft crank (7) pilot hole, displacement mechanism (3) one side on crankshaft crank lever connecting rod (6) is equipped with dynamic balance piece (5), aggregate unit (10).

3. The variable piston stroke variable compression ratio internal combustion engine mechanism according to claim 1, characterized in that: the displacement driving device (4) is assembled on the crankshaft crank lever connecting rod (6) and located on one side of the crankshaft crank lever connecting rod (6), the power output end of the displacement driving device (4) is assembled with the displacement mechanism in a linkage mode, and the displacement driving device (4) is controlled by an internal combustion Engine Computer (ECU).

4. The variable piston stroke variable compression ratio internal combustion engine mechanism according to claim 1, characterized in that: the dynamic balance block (5) is provided with a linkage device (10) between the dynamic balance block (5) and the shifting mechanism (3), the dynamic balance block (5) is hinged with a crankshaft crank lever connecting rod (6), and a hinged part is arranged on the crankshaft crank lever connecting rod (6) and is positioned on one side of the shifting mechanism (3).

5. The linkage device (10) according to claim 1, wherein the linkage device (10) is respectively assembled on the shifting mechanism (3) and the dynamic balance weight (5), and the shifting mechanism (3) and the dynamic balance weight (5) are assembled in a reverse linkage manner.

The technical field is as follows:

the invention relates to the field of internal combustion engines, in particular to a mechanism and a control method for a variable piston stroke and a variable compression ratio of an internal combustion engine.

Background art:

the internal combustion engine is a power mechanism, the piston stroke of the existing piston internal combustion engine is fixed and invariable, and the requirement under complex working conditions cannot be met. The internal combustion engine used by the vehicle is more suitable, the internal combustion engine used by the current vehicle is mainly selected according to the type and the use condition of the vehicle, the matching is not ideal, and the requirements of the vehicle under different road conditions and different working conditions cannot be met. Causes the problems of energy waste, environmental pollution, insufficient torque and the like.

The invention content is as follows:

the invention aims to provide an internal combustion engine which can meet different environmental conditions and different working conditions, can be switched between large torque, high rotating speed and energy conservation according to requirements, enables the internal combustion engine to be perfectly matched with the use requirements,

in order to achieve the above purpose, the invention has the following specific technical scheme;

an internal combustion engine mechanism with variable piston stroke and variable compression ratio and a control method thereof, when the piston stroke and the compression ratio are changed, the internal combustion engine mechanism can be controlled by an internal combustion engine control computer (ECU), and can also be manually controlled according to requirements,

the variable piston stroke and variable compression ratio mechanism of the internal combustion engine comprises a piston, a piston connecting rod, a crankshaft crank lever connecting rod, a dynamic balance block, a crankshaft crank, a displacement mechanism of the hinged part of the piston connecting rod and the crankshaft crank lever connecting rod, a swinging connecting rod, a displacement driving device of the hinged part of the piston connecting rod and the crankshaft crank lever connecting rod displacement mechanism, and a linkage mechanism,

one end of the piston connecting rod is hinged with the piston, the other end is hinged with one end of a power arm of the crankshaft crank lever connecting rod, a displacement mechanism is assembled on the hinged part of the piston connecting rod and the crankshaft crank lever connecting rod, the displacement mechanism can move the force application point of the power arm to one side of the far end of the crankshaft crank and also can move to the direction of the crankshaft crank so as to change the position of the force application point,

when the force application point of the piston connecting rod and the hinged part of the crank lever and crank lever connecting rod moves to the far end side in the opposite direction of the crank and moves to the far end side of the crank, the position of the force application point is changed, so that one end of the power arm of the crank lever and crank lever connecting rod is prolonged, the moment obtained by the stress point of the crank is larger as the lever is longer, meanwhile, the piston stroke is lengthened and the compression ratio is increased, the acting time of the internal combustion engine is correspondingly prolonged, and under the double action of lengthening the lever at one end of the power arm of the crank lever and crank lever connecting rod and lengthening the acting time of the piston as the piston stroke is lengthened, the internal combustion engine obtains,

after the force application point of the hinged part of the piston connecting rod and the crankshaft crank lever connecting rod moves towards the crankshaft crank direction, the lever at one end of the power arm of the crankshaft crank lever connecting rod is shortened, the piston stroke is shortened, the compression ratio is reduced, the internal combustion engine obtains higher rotating speed so as to meet the requirement of high rotating speed of the internal combustion engine,

the displacement driving device is arranged on one side of the crankshaft crank lever connecting rod and is used for driving the displacement mechanism of the hinge part of the piston connecting rod and the crankshaft crank lever connecting rod to move in the far and near directions taking a crankshaft crank as a coordinate and linking the dynamic balance block to move in the opposite direction, the linkage device is arranged between the dynamic balance block and the displacement mechanism, the dynamic balance block is a displacement mechanism of the hinge part of the piston connecting rod and the crankshaft crank lever connecting rod and moves in the opposite direction, and the dynamic balance block is used for compensating the crankshaft dynamic balance unbalance phenomenon caused by the movement of a force application point at one end of the displacement mechanism, so that the crankshaft can still keep the crankshaft dynamic balance state during or after the movement of the force application point of the hinge part of the piston connecting rod and the crankshaft crank lever connecting rod, and the crankshaft of the.

The crankshaft crank mounting hole on the crankshaft crank lever connecting rod is assembled on a crank of the crankshaft to serve as a stress point, the piston connecting rod is pushed when the piston does work, the piston connecting rod transmits the thrust of the piston doing work to the force application point at one end of the power arm of the crankshaft crank lever connecting rod, the other end of the crankshaft crank lever connecting rod is hinged with the swinging connecting rod, and the other end of the swinging connecting rod is hinged with the cylinder body. Because the swinging connecting rod can only swing left and right, the upper part and the lower part are limited as fulcrums, the crankshaft crank positioned at the stress point position of the crankshaft crank lever connecting rod is pried to move downwards, and the rotating motion of the crankshaft crank pushed is taken as power to be output outwards. The length of the lever at one end of the power arm of the crank lever connecting rod of the crankshaft and the distance of the stroke of the piston are the key factors of how much torque can be output by the internal combustion engine.

Drawings

FIG. 1; the invention has the overall structure schematic diagram;

FIG. 2; the displacement mechanism and piston position of the present invention are illustrated schematically;

in FIG. 1; the device comprises a 1-piston 2-piston connecting rod 3-shifting mechanism 4-shifting mechanism driving device 5-dynamic balance block 6-crankshaft crank lever connecting rod 7-crankshaft crank 8-swinging connecting rod 9-cylinder body articulated part 10 linkage device.

A specific embodiment; the invention is further described with reference to the following figures and detailed description: example (c); as in fig. 1: 1-10, a variable piston stroke and variable compression ratio mechanism for an internal combustion engine, comprising a piston 1 and a piston rod 2, wherein the piston 1 and the piston rod 2 are similar to those used in common. 3, a shifting mechanism 3, wherein the shifting mechanism 3 is arranged on a hinged part of one end of a power arm of a crankshaft crank lever connecting rod 6 and a piston connecting rod. In the figure, an eccentric shaft is taken as an embodiment of the displacement mechanism 3, the top dead center of a piston is 0 degree, when the axis of one end of an eccentric hole points to 55 degrees (as shown in figure 2; 3), the distance between a force application point and a crankshaft crank 7 is the shortest, a power arm is shortened, the stroke of the piston 1 is the shortest, and the internal combustion engine can run at a high rotating speed. The top dead center of the piston is 0 degree, when the axis at one end of the eccentric hole rotates clockwise to the lowest position, the eccentric hole is located at a position of 180 degrees (as shown in figure 2; 2), the compression ratio is minimum at the moment, the eccentric hole is suitable for running under a low-load working condition, when the axis at one end of the eccentric hole rotates clockwise to 235 degrees (as shown in figure 2; 1), the distance between the force application point of the hinged part of the piston connecting rod 2 and the crank connecting rod 6 of the crank lever and the crank 7 is farthest, the lever at one end of the power arm is extended, the stroke of the piston 1 is increased while the lever is extended, the compression ratio is increased, and the internal combustion engine can output larger torque.

The axis of one end of the eccentric hole of the eccentric shaft of the shifting mechanism 3 rotates clockwise or counterclockwise between 55 degrees and 235 degrees, and the above data is only used for explaining the working principle of the shifting mechanism 3 of the present case and does not limit the type of the shifting mechanism 3. The displacement motion of the displacement mechanism 3 is driven by the displacement driving device 4 to perform the displacement motion, and the displacement mechanism 3 is driven to move to a position corresponding to the requirement by controlling the displacement driving device 4. The shifting mechanism 3 moves while the dynamic balance block 5 is linked to move in the direction opposite to the force application point on the shifting mechanism 3, one end of the dynamic balance block 5 is hinged to one side of the power arm of the crank lever connecting rod 6 of the crankshaft, and a linkage device 10 is assembled between the dynamic balance block 5 and the shifting mechanism 3 to form reverse linkage. The crankshaft crank mounting hole of the crankshaft crank lever connecting rod 6 is assembled on the crankshaft crank 7 and serves as a stress point, the other end of the crankshaft crank lever connecting rod 6 serves as a fulcrum to be hinged with the swinging connecting rod 8, the other end of the swinging connecting rod 8 is hinged with the cylinder body hinged portion 9, and the cylinder body hinged portion 9 is located below the crankshaft and is fixed with the cylinder body to the right.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes, modifications, equivalents, and improvements may be made without departing from the spirit and scope of the invention.