CN202165175U

CN202165175U - Composite piston of a double action structure for a vehicle engine

Info

Publication number: CN202165175U
Application number: CN201120239538XU
Authority: CN
Inventors: 李日青
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-08
Filing date: 2011-07-08
Publication date: 2012-03-14
Anticipated expiration: 2021-07-08

Abstract

The utility model provides a composite piston of a double action structure for a vehicle engine, comprising a piston cylinder with a gas inlet and a gas outlet and a main piston movably arranged in the piston cylinder, characterized in that: an auxiliary piston capable of reciprocating relative to the main piston and driving the main piston to move together is arranged in the main piston and connected with a crank by a connection rod. The composite piston has features of reasonable structure and high utilization rate of the fuel and facilitates the increase in the combustion efficiency and the power of the engine.

Description

Motor car engine is with the compound piston of two moving structures

Technical field

The utility model belongs to the equipment of using on a kind of motor car engine, relates in particular to the compound piston of a kind of motor car engine with two moving structures.

Background technique

At present, well-known, no matter existing orthodox car motor is petrol engine or diesel engine, and its air inlet, compression stroke equate with work done, exhaust stroke.When work done stops, certain energy when beginning, is still arranged in the cylinder in exhaust, and these energy can only work as waste gas and drained, and this is the drawback of existing conventional engines maximum, and so not only motor wastes energy, and also makes engine efficiency reduce greatly.

Summary of the invention

Goal of the invention: the utility model provides the compound piston of a kind of motor car engine with two moving structures, to such an extent as to its objective is available engine utilizes insufficient inefficiency because of the short energy that is brought of expansion space stroke the problem that solves.

Technological scheme: the utility model is realized through following technological scheme:

A kind of motor car engine is with the compound piston of two moving structures; Comprise the piston cylinder that has suction port and air outlet and be movably arranged on the main piston in the piston cylinder; It is characterized in that: also be provided with to do with main piston at said main piston interior and do relatively reciprocating motion and can also drive the sub-piston that main piston moves, sub-piston is connected to crank through connecting rod.

Be provided with damping spring between main piston and the sub-piston; The upper end of last damping spring is arranged on the inboard top of main piston, and the bottom that sub-piston is arranged on sub-piston is passed in the lower end of last damping spring.

Promising sub-piston is set in the lower edge of main piston moves down the following damping spring that carries out damping.

Advantage and effect: the utility model provides the compound piston of a kind of motor car engine with two moving structures; Comprise the piston cylinder that has suction port and air outlet; Be movably arranged on the main piston in the piston cylinder; Interior also being provided with at said main piston can be done the sub-piston that does relatively reciprocating motion with main piston, and sub-piston is connected to crank through connecting rod.

The maximum characteristics of this model utility are to regulate the air inlet of cylinder, minimum cylinder volume and work done delivery space.Popular says exactly with the air inlet of motor, when compression stroke is set at a certain value, and work done and exhaust stroke go out best work done and exhaust stroke according to the size design of intake stroke.To reach the energy that utilizes fuel in the cylinder to greatest extent.

The working principle of this piston is; When crank was begun to rotate by top dead center in intake stroke, connecting rod drives sub-piston to begin to move downward, at this moment the main piston transfixion; Main piston begins to move downward when sub-piston moves to certain stroke, at this moment just begins real air inlet.When crank by lower dead center when top dead center rotates, at this moment can not consider the movement travel of sub-piston, the compression stroke of main piston is equivalent to intake stroke when crank rotates to top dead center.When work done began, major and minor piston moved downward simultaneously, and the intake stroke that the size of its expansion space stroke equals main piston adds that the stroke of sub-piston also equals the rotating diameter of crank.

This model utility is simple for structure, and rationally effect is obvious, when improving resource utilization, has improved the efficient of motor greatly, is beneficial to and applies.

Description of drawings:

Fig. 1 is the schematic representation of the original state of the utility model;

Schematic representation when Fig. 2 begins for the air inlet of the utility model;

Schematic representation when Fig. 3 stops for the utility model air inlet;

Fig. 4 is the utility model compression schematic representation the when initial stage, sub-piston began to move;

Schematic representation when Fig. 5 moves the beginning pressurized gas for main piston with sub-piston;

Schematic representation when Fig. 6 stops for compression;

Schematic representation when Fig. 7 begins for work done;

Schematic representation when Fig. 8 stops for work done;

Schematic representation when Fig. 9 begins for exhaust;

Schematic representation when Figure 10 stops for exhaust;

Figure 11 is the schematic representation of A structure between observation main piston and sub-piston in Figure 10;

Figure 12 is for showing the schematic representation of structure between main piston and the sub-piston.

Mode of execution:Below in conjunction with accompanying drawing the utility model is done nearly step explanation:

As shown in Figure 1; The utility model provides the compound piston of a kind of motor car engine with two moving structures; Comprise the piston cylinder 1 that has suction port 9 and air outlet 10 and be movably arranged on the main piston 2 in the piston cylinder 1; Interior also being provided with at said main piston 2 can be done the sub-piston 4 that does relatively reciprocating motion with main piston 2, and sub-piston 4 also can drive main piston 2 and move together when needed; Sub-piston 4 is connected to crank 6 through connecting rod 5.Flexibly connect through wrist pin 11 between sub-piston 4 and the connecting rod 5; Outer side wall at sub-piston 4 is provided with feather key 12; Feather key 12 contacts with the madial wall guiding groove of main piston 2, and sub-piston 4 moves back and forth in main piston 2 through feather key 12 is spacing.

As shown in Figure 2, between main piston 2 and sub-piston 4, be provided with damping spring 7; The upper end of last damping spring 7 is arranged on the inboard top of main piston 2; The bottom that sub-piston 4 is arranged on sub-piston 4 is passed in the lower end of last damping spring 7, and damping spring 7 prevents between main piston 2 and the sub-piston 4 because the hard collision that does relatively reciprocating motion and caused on this.

In the lower edge of main piston 2 promising sub-piston 4 is set and moves down the following damping spring 8 that carries out damping, following damping spring 8 reduces the hard collision of sub-piston 4 when air-breathing moving down.

The working procedure of this model utility is following:

Intake process:

As illustrated in fig. 1 and 2; When crank 6 is begun to rotate by top dead center M in intake stroke; Connecting rod 5 drives sub-pistons 4 to begin to move downward, main piston 2 transfixions at this moment, and main piston 2 begins to move downward under the drive of sub-piston 4 when sub-piston 4 moves to certain stroke; Sub-piston 4 runs to and where drives main piston 2 motion and can adjust as required; And when main piston 2 moves downward, just begin real air inlet, and gas is got into by suction port 9, and the C among Fig. 2 is an airintake direction; As shown in Figure 3, when main piston 2 and sub-piston 4 ran to the place, lower edge of piston cylinder 1, crank 6 also drivening rod 5 had rotated to lower dead center N, and intake process finishes.As shown in Figure 3, H is an intake stroke, and L is sub-piston 4 movement travels.

Compression process:

At this moment, inlet close, as shown in Figure 4; When crank 6 by lower dead center N when top dead center M rotates, at this moment can not consider the movement travel of sub-piston 4, at this moment, sub-piston 4 is to the top orientation motion of main piston 2; At this moment main piston 2 is motionless, and is as shown in Figure 5, when sub-piston 4 withstands main piston 2 and with main piston 2 beginning during together to the top orientation motion of piston cylinder 1; Pressurized air begins, and the arrow among Fig. 5 is the moving direction of sub-piston 4 and main piston 2; As shown in Figure 6, sub-piston 4 withstands main piston 2 pressurized air completion together when crank 6 rotates to top dead center M, and at this moment, the compression stroke of main piston 2 is equivalent to intake stroke, just the distance shown in the H among Fig. 3.

The work done process:

As shown in Figure 7, when work done begins, main piston 2 moves downward with sub-piston 4 simultaneously, at this moment begins work done; Main piston 2 drives crank 6 rotations with sub-piston 4 through connecting rod 5; As shown in Figure 8, when main piston 2 when sub-piston 4 drives crank 6 and rotates to lower dead center N by top dead center, work done finishes; The intake stroke that the size of expansion space stroke at this moment equals main piston adds that the stroke of sub-piston also equals the rotating diameter of crank; Just among the figure the represented stroke of the represented stroke of H and L with, so just realized the purpose of increase expansion space stroke, not only increased the utilization ratio of fuel; Also improved efficient greatly, and original expansion space stroke is merely the H stroke shown in Fig. 8.

Exhaust process:

As shown in Figure 9, crank 6 is rotated to top dead center by lower dead center N, the beginning exhaust; Gas is discharged by air outlet 10, and D is discharge directions among the figure, and is shown in figure 10; When crank 6 rotates to top dead center M; Exhaust finishes, and promptly can begin the air inlet work done process of next round, and so to-and-fro motion realizes the engine high-efficiency running.

The utility model is rational in infrastructure, and is high to the utilization ratio of fuel, is beneficial to the combustion efficiency and the power that improve motor.

Claims

1. a motor car engine is with the compound piston of two moving structures; Comprise the piston cylinder (1) that has suction port and air outlet and be movably arranged on the main piston (2) in the piston cylinder (1); It is characterized in that: interior also being provided with at said main piston (2) can be done the sub-piston (4) that does relatively reciprocating motion and can also drive main piston (2) motion with main piston (2), and sub-piston (4) is connected to crank (6) through connecting rod (5).

2. motor car engine according to claim 1 is characterized in that: between main piston (2) and sub-piston (4), be provided with damping spring (7) with the compound piston of two moving structures; The upper end of last damping spring (7) is arranged on the inboard top of main piston (2), and the bottom that sub-piston (4) is arranged on sub-piston (4) is passed in the lower end of last damping spring (7).

3. motor car engine according to claim 1 and 2 is characterized in that: promising sub-piston (4) is set in the lower edge of main piston (2) moves down the following damping spring (8) that carries out damping with the compound piston of two moving structures.