JPH0430268U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1 to 7 are related to the present invention, and the first
Fig. 2: A sectional view of the main part of an embodiment of the piston fixed position stopping means 3000, Fig. 2: A front view of the main part of the same, Fig. 3
Fig. 4: An explanatory diagram of the operation of the piston fixed position stopping means 3000, Fig. 4: A sectional view of a main part of an embodiment of the starting fuel supply means 4000 and a fuel supply device using the same, Fig. 5: Starting fuel supply FIG. 6 is a sectional view of the main parts of another embodiment of the means 4000. FIG. 6 is a system diagram of the main parts of another embodiment of the starting fuel supply device. FIG. Departmental diagram, No. 8
Figures 13 to 13 relate to conventional examples, and Figure 8...
... A sectional view of the main parts of the conventional engine 2000, FIG. 9... A sectional view of the main parts of the membrane valve type carburetor 300, FIG. Partial sectional view and conventional fuel supply device 2
Main part system diagram of 000, Figure 11...Conventional engine 20
00 recoil type starter 900 main part sectional view,
FIG. 12: A front view of the main parts of the recoil starter 900 of the conventional engine 2000, FIG. 13: A sectional view of the main parts of the float type carburetor 300a, and other main parts of the conventional fuel supply system 2000 using both. Departmental diagram. 2000, 2000a... engine, 2100, 2
100a...Intake system, 2200, 2200a...
Fuel supply device, 2300... one-way clutch, 2
300a...Bidirectional clutch, 3000...Piston fixed position stopping means, 4000...Starting fuel supply means, 4700...Opening/closing valve, 900...Recoil type starter, 920...Initial position return type torque application means (or recoil pulley), 922... Recoil spring, 930... Torque application member (or rope), 940, 945... Cam, 940a, 94
5a...Cam curve, 960...Starting claw, 960a
...Stop claw, 980...Fly oil (magnetic wheel), 112A...Fuel inlet in intake passage, 121A...Fuel inlet in crank chamber, 1
13A...Fuel inlet in the scavenging passage, 140...Crankshaft, 160A...Fuel inlet in the combustion chamber, 3
00...Membrane valve type vaporizer, 300a...Float type vaporizer.

Claims (1)

[Claims for Utility Model Registration] (1) A piston fixed position stopping means 3000 that stops the piston near the bottom dead center when the engine is stopped; , a spark ignition type having a starting fuel supply means 4000 that supplies starting fuel to the inside of the crank chamber 121, the inside of the intake passage 112, and part or all of the inside of the float chamber 315 in the case of an engine having the float chamber carburetor 300a. 2 cycle engine. (2) Piston fixed position stopping means 3 according to claim 1
000 is a convex portion 931 provided at the end of the torque applying member 930 using applied torque in the cranking direction and using strain energy stored in the spring member 922.
an initial position return type torque application means 920 in which the torque application member 930 returns to its initial position after being forcibly displaced by a fixed positioning means determined by the mating member 912; When the engine is started, cranking torque is transmitted, and when the engine is stopped, torque is transmitted from the crankshaft 140 to the initial position return type torque application means 920 to brake the force storage action of the spring member 922 of the torque application means 920. The output end of the torque applying means 920 and the crankshaft 140 are used to stop the engine as a torque, and to stop the piston near the bottom dead center by utilizing the action of returning the torque applying means 920 to its initial position due to the energy generated at that time.
Bidirectional torque transmission means 2 provided between the ends of
A spark ignition two-stroke engine comprising: 300a. (3) Bidirectional torque transmission means 23 according to claim 2
00a is initial position return type torque application means 920
A disc-shaped cam 9 that is integrally provided with a recoil pulley 920 and has a protrusion 946 within a predetermined circumferential angle range.
45, a magnet wheel 980 that is provided on the non-output end side of the crankshaft 140 and also serves as a flywheel and is integrally provided with the generator magnetic pole 1010; Two springs 97 rotatable around an axis 950 located at a predetermined distance and having different spring stiffnesses.
0 and 970a, a starter pawl 960 that is biased with a strong spring force that changes the rotation radius of the tip of the pawl by centrifugal force, and a stop pawl 960a that is biased with a weak spring force. The starter pawl and the stop pawl mesh with one side surface 946a and the other side surface 946b of the protrusion, leaving a gap g with respect to the other. The engagement transmits the torque applied to the recoil pulley 920 to the crankshaft 140, and when stopped, the engagement between the stop claw 960a and the other surface 946b of the protrusion 946 transmits bidirectional torque from the crankshaft 140 to the recoil pulley 920. A spark ignition 2-stroke engine that is characterized by high power transmission. (4) The starting fuel supply means 4000 according to claim 1 supplies one side directly to the combustion chamber 160 and the other side to the intake passage 112.
In the case of an engine using a float type carburetor in the crank chamber 121 and the scavenging passage 113, the spark ignition is characterized in that the starting fuel is supplied to part or all of the float chamber 315. 2-stroke engine. (5) The opening and closing of the fuel inlet passage of the starting fuel supply means 4000 according to claim 4 is controlled by a temperature sensing member 4730, and when the temperature of the temperature sensing member is equal to or higher than a predetermined temperature, the operation of the starting fuel supply means is stopped. A spark ignition two-stroke engine characterized by a similar configuration.