1. A wiper arm (10) that is comprised of a mounting part (12) and an articulating part (14), which is pivotably connected to a first region (16) of the mounting part (12) by means of a hinge joint (22) and has a wiper rod (24), to which a wiper blade is pivotably connected, wherein the mounting part (12) is securely affixed with a second region (18) to a drive shaft (20) and braced in relation to the articulating part (14) by means of a tension spring (28), characterized in that the mounting part (12) has a device (34, 36, 42), which permits the first region (16) of the mounting part (12) oriented toward the articulating part (14) to collapse toward a vehicle windshield in a defined manner.
2. The wiper arm (10) according to claim 1, characterized in that the device is a predetermined breaking point (34, 36) of the mounting part (12).
3. The wiper arm (10) according to claim 2, characterized in that the predetermined breaking point is comprised by means of a notch (34) andor perforations (36) in the side walls of the mounting part (12).
4. The wiper arm (10) according to claim 1, characterized in that the first and second region (16, 18) are separate components, which are connected by the device, which is embodied as a joint (42) whose pivoting motion in the folding direction is limited by a stop (56). (FIG. 2).
5. The wiper arm (10) according to claim 4, characterized in that a spring (46) presses the first region (16) against the stop (56) in an operating position and is designed so that it supports the weight of the wiper arm (10) in the folded position of the wiper arm (10) (FIG. 10).
6. The wiper arm (10) according to claim 4, characterized in that the joint (42) has a hub with a bearing bore, which is embodied in longitudinal direction of the mounting part (12) as a cross sectionally oblong hole (44) and which engages on a hinge pin (48), wherein the parts (16, 18) of the mounting part (12) support each other in the operating position by means of the latch surfaces (50, 52) andor on the hinge pin (48) and the stop (56) (FIG. 4, FIG. 5).
7. The wiper arm (10) according to claim 6, characterized in that the oblong hole (44) is open toward the articulating part (14) (FIG. 5).
8. The wiper arm (10) according to one of the claims 4 to 7, characterized in that the spring (46) is a tension spring.
9. The wiper arm (10) according to claim 8, characterized in that the hinge joint (22) and the joint (42) are provided with a shared spring (28, 46), which is mounted by means of a cable (58) between a first anchor point (26) on the articulating part (14) and a second anchor point (40) on the second part (18) of the mounting part (12), wherein the cable (58) is guided between two guide elements (60), which extend lateral to the longitudinal direction, on the mounting part (12) in the vicinity of the hinge joint (22).
10. The wiper arm (10) according to one of the claims 4 to 9, characterized in that the end of the articulating part (14), which is oriented toward the mounting part (12), has an elastic stop (62), which points toward the vehicle windshield in a folded position (FIG. 10).
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A four-stroke internal combustion engine with at least two inlet valves and an inlet flow path with at least two inlet ports per cylinder which branch off from a common inlet pipe and are guided separately up to the inlet valves and of which at least one inlet port is designed as a charge loading port and at least one inlet port as a volumetric port, with a throttle device for volumetric control being provided in the inlet flow path and the inlet flow path being connected with a fuel supply device, wherein the fuel supply device is formed by a joint carburettor for both inlet ports.
2. An internal combustion engine according to claim 1, wherein the carburettor is arranged in the zone of the branching of the inlet ports from the inlet pipe.
3. An internal combustion engine according to claim 1, wherein first the charge loading port and thereafter the volumetric port can be opened during the opening of the throttle device.
4. An internal combustion engine according to claim 1, wherein the charge loading port is arranged as a tangential port.
5. An internal combustion engine according to claim 1, wherein the charge loading port is arranged as a spiral port.
6. An internal combustion engine according to claim 1, wherein the carburettor is a slide valve carburettor.
7. An internal combustion engine according to claim 6, wherein the carburettor is provided with a carburettor slide valve which is arranged in the zone of the beginning of one port separating wall between the two inlet ports and forms a port separating member.
8. An internal combustion engine according to claim 7, wherein the carburettor slide valve forms a throttle device.
9. An internal combustion engine according to claim 1, wherein the carburettor is a constant-pressure carburettor.
10. An internal combustion engine according to claim 9, wherein the carburettor is provided with a carburettor slide valve which is arranged in the zone of the beginning of one port separating wall between the two inlet ports and forms a port separating member.
11. An internal combustion engine according to claim 10, wherein the carburettor slide valve forms a throttle device.
12. An internal combustion engine according to claim 1, wherein the carburettor is arranged as a rotating throttle valve carburettor.
13. An internal combustion engine according to claim 12, wherein a rotating throttle valve is arranged in each of the inlet ports and wherein the rotating throttle valves are successively actuatable in a register-like manner.
14. An internal combustion engine according to claim 13, wherein the rotating throttle valves form the throttle device.
15. An internal combustion engine according to claim 1, wherein the throttle device is provided with at least one throttle valve per inlet port.
16. An internal combustion engine according to claim 1, wherein the carburettor is provided with a full-load power jet which is arranged in the direction of flow to the volumetric port, so that the fuel jet of the full-load power jet predominantly enters the volumetric port.
17. An internal combustion engine according to claim 1, wherein at least one self-opening diaphragm valve is provided in the port separating wall between the two inlet ports downstream of the throttle device, which diaphragm valve connects the two inlet ports and which produces the flow connection from the charge loading port to the volumetric port in the case of pressure difference.
18. An internal combustion engine according to claim 1, wherein downstream of the throttle device at least one exhaust gas return conduit opens into at least one inlet port.
19. An internal combustion engine according to claim 18, wherein the exhaust gas return can be actuated by a slide valve which is coupled with the control for the throttle device.
20. An internal combustion engine according to claim 1, wherein the length of the charge loading port and the volumetric port is different, with the charge loading port being longer than the volumetric port.
21. An internal combustion engine according to claim 1, wherein at least two inlet ports are arranged above one another in the zone of the carburettor outlet.
22. An internal combustion engine according to claim 21, wherein the volumetric port is arranged above the charge loading port.
23. An internal combustion engine according to claim 1, wherein the inlet ports are provided with a slope between carburettor and inlet valve.
24. An internal combustion engine according to claim 1, wherein the carburettor is arranged as a cross flow carburettor.
25. An internal combustion engine according to claim 1, wherein at least one inlet port is provided with at least one stall edge.
26. An inlet combustion engine according to claim 25, wherein the charge loading port is provided with at least one stall edge.
27. An internal combustion engine according to claim 25, wherein the stall edge is arranged on a side of the inlet port which is adjacent to the wall of the cylinder.
28. An internal combustion engine according to claim 25, wherein the stall edge is arranged on the outside of an arc-shaped section of the inlet port.
29. An internal combustion engine according to claim 1, wherein a port loop is arranged in one of the inlet ports.
30. An internal combustion engine according to claim 29, wherein the port loop is arranged in the charge loading port.
31. An internal combustion engine according to claim 29, wherein the port loop can be by-passed depending on the operating status of the engine.
32. An internal combustion engine according to claim 31, wherein the port loop can by by-passed by a by-pass valve which controls a by-pass opening.
33. An internal combustion engine according to claim 32, wherein the by-pass valve is a diaphragm valve which opens the by-pass opening at a predefined pressure difference between the loop entrance and the loop exit of the port loop.