DE19813492C2 - Piston engine with vibrating work unit - Google Patents

Description

The system is based on the kinematic mode of operation of the swivel bucket Internal combustion engine, patent specification DE 195 12 998 C2 and is the state of the Technology used.

The invention has for its object the efficiency of conventional Improve piston engines.

According to the invention the object is achieved by those mentioned in the claims Features solved.

As shown in the kinematic-dynamic diagram Fig. 2 of the drawings, force impulses from combustion gases act on the piston ( 4 ) and are on the shortened piston rod ( 5 ) on the swing arms ( 6 , 7 ), which are fixed together on the shaft ( 14 ) are transferred and generate the pendulum moment.

This moment is converted into the torque in the crank system ( 10-13 ) via the crank connecting rod ( 8 ) and finally transferred to the large flywheel (see legend for αp and βw). The swing arms, favored by the mentioned ranges of the pendulum angles αp and βw, enable a more effective use of energy with this kinematic arrangement. In addition, compared to conventional power transmission technology in internal combustion engines and other engines, there are further advantages:

• - The use of a very short connecting rod, which means a smaller mass and increases the kink resistance.
• - The external dimensions of the engine block and the weight; reduce both sizes about 20% with the same displacement.

Legend

αp - angle between crank arm (

7

) and crank rods (

8th

).
βw - angle between the turning positions of the swing arms (

6

.

7

).
Pwt - resultant of the gas pressure acting on the piston.
Pwz - variable resultant of the gas pressure according to the relaxation diagram.
Po (Poz) - circumferential force of the crank arm (point Z ')
Pk (Pkz) - force acting along the connecting rod (point Z ')
WZ - turning position on the cylinder head
WK - turning position of the crank
SAE - Vibrating work unit
Rws - constant piston arm (radius)
Rwz - variable piston arm (theoretical)
z - changeable
Ow - piston and crank swing axis
Ok - crank axis (axis of rotation of the crank system)
n - number of turns and direction
Mw - pendulum moment of the work unit
Mk - torque in the crank system
iz - translation of the crank system in relation to the vibration system

rws - constant crank arm (radius)
rwz - variable crank arm (theoretical)
rks - constant crank arm (radius)
rkz - variable crank arm (theoretical)
Ft - effective piston area
St - Hub
Dt - cylinder diameter
V - displacement
Vε - combustion chamber volume
pv - compression pressure
pi - gas pressure
Nz - lateral piston pressure (lateral force)

position directory

1

cylinder head

2

injection

3

cylinder

4

piston

5

Kolbenpleuel

6

Piston arm with pin

7

Kurbelschwingarm

8th

Kurbelpleuel

9

crank pin

10

crank

11

counterweight

12

crankshaft

13

Gear (connection to the flywheel shaft)

14

swing arm

Kinematic-dynamic explanations I. Underlying angle values

15 ° ≦ αp ≦ 50 ° Initial angle between the crank arm and connecting rod at the turning point of the piston on the cylinder head.
80 ° ≦ βw ≦ 120 ° pendulum angle, which determines the stroke St at a certain radius length Rws.

The angles for:
Two-stroke: αp in the lower value range
βw in the upper range
Four-stroke: αp in the upper value range
βw in the lower range

II.

Variable translation that occurs during the movement of the vibrating unit and the crank system. It results from the values of the angles αp and βw and the direction of rotation n.
rkz - theoretically variable crank arm with radius rks, on which the connecting rod acts during the rotation of the crankshaft.
rwz - theoretically variable crank arm rws ┴ to the crank connecting rod axis in the direction of the acting force Pkz along this axis.

In the lower area αp and upper area βw iz can be extremely high, reaching 1.8 Achieve values.

III. n-direction of rotation of the crankshaft

The specified direction of rotation enables maximum Translations iz in the movement phase of the highest pressures in the cylinder, which trigger high instantaneous values in the crank system.

IV. Calculation formulas

Drawings with calculation example

Fig. 1: piston engine with vibrating work unit.

Fig. 2: Kinematic-dynamic scheme

Fig. 3: Explanations of the kinematics and dynamics

Fig. 4: Indicator diagram

Fig. 5: Calculation example

Claims (4)

1. Internal combustion engine with an oscillating piston, the torque of which is transmitted to a crankshaft by means of a swivel mechanism, characterized in that
the swivel mechanism consists of a piston connecting rod ( 5 ) which is articulated on the piston-side end of a swing arm;
that the rocker arm is designed as a piston-side piston rocker arm ( 6 ) and crankshaft-side crank rocker arm ( 7 ), the rocker arm being fixed on the rocker arm shaft ( 14 );
that the crank-side end of the swing arm is articulated to a crank connecting rod ( 8 ) for connection to a crank pin ( 9 ) on a crank ( 10 ). 2. Internal combustion engine according to claim 1, wherein the piston and crank arm ( 6 , 7 ) in a spread arrangement is fixed up to an angle of maximum 120 ° on the arm shaft ( 14 ). 3. Internal combustion engine according to claim 1, wherein the piston and crank arm ( 6 , 7 ) sweeps a pendulum angle βw of minimum 80 ° and maximum 120 °; while the angle αp between the connecting rod ( 8 ) and the crank arm ( 7 ) at the turning point of the piston on the cylinder head ranges from a minimum of 15 ° to a maximum of 50 °. 4. Internal combustion engine according to claim 1, applicable to others Combustion engines.