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Device for variably adjusting control times of gas exchange valves of an internal combustion engine

A technology for internal combustion engines and ventilation valves, which is applied in valve devices, mechanical equipment, engine components, etc., can solve the problems of increased weight and increased cost of devices requiring structural space

Inactive Publication Date: 2010-11-17
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in increased costs when manufacturing the device
In addition, the installation space requirement of the device and the weight of the device increase

Method used

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  • Device for variably adjusting control times of gas exchange valves of an internal combustion engine
  • Device for variably adjusting control times of gas exchange valves of an internal combustion engine
  • Device for variably adjusting control times of gas exchange valves of an internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0034] exist figure 1 The internal combustion engine 1 is shown in , wherein the piston 3 on the crankshaft 2 is shown in the cylinder 4 . In the embodiment shown, the crankshaft 2 is connected to the intake camshaft 6 or the exhaust camshaft 7 via a traction mechanism transmission 5 in each case, wherein a first and a second device 10 are responsible for the connection of the crankshaft 2 to the camshafts 6 , 7 relative rotation between them. The cams 8 of the camshafts 6, 7 actuate one or more intake gas exchange valves 9a or one or more exhaust gas exchange valves 9b. It can likewise be provided that only one camshaft 6 , 7 is equipped with the device 10 or that only one camshaft 6 , 7 is provided with the device 10 .

[0035] Figure 2a and 2b An embodiment of the device 10 according to the invention is shown in plan view or longitudinal section.

[0036] The device 10 has an adjustment device 11 and a hydraulic system 12 . The adjusting device 11 has a transmission ...

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PUM

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Abstract

The invention relates to a device (10) for variably adjusting control times of gas exchange valves (9a, 9b) of an internal combustion engine (1). Said device comprises a drive element (22), an output element (23), a rotation angle limiting device (42, 43) and a control valve (37). At least two counter-working pressure chambers (35, 36) are also provided. Phase adjustment between the output element (23) and the drive element (22) can be initiated by applying pressure to one of the pressure chambers (35, 36) whilst simultaneously discharging the other pressure chamber. Said rotation angle limiting device (42, 43) prevents the phasing from altering when in the locked state and said rotational angle limiting device (42, 43) allows the phasing to be altered when in the unlocked state. Said rotational angle limiting device (42, 43) can be transferred from the locked state into the unlocked state due to pressure. Said control valve (37) comprises a valve housing (52) and a control piston (54). An inflow connection (P), at least one outflow connection (T), a control connection (S) and two working connections (A, B) are embodied on the valve housing (52). The inflow connection (P) is connected to the pressure source (47), the outflow connection (T) is connected to the tank, the control connection (S) is connected to the rotational angle limiting device (42, 43) and the working connections (A, B) are connected, respectively to one of the pressure chambers (35, 36) and the control valve (37) is arranged in a central receiving area (40) of the output element (23).

Description

technical field [0001] The invention relates to a device for variably adjusting the gas distribution timing of a gas exchange valve of an internal combustion engine, the device having a transmission element, a driven element, a swivel angle limiting device and a control valve, in which at least two mutually acting pressure chambers, wherein a phase shift can be induced between the driven part and the transmission part by applying a pressure medium to one of the pressure chambers while the other pressure chamber is simultaneously emptied, wherein the angle of rotation delimiting device is in A phase change is prevented in the locked state, wherein the angle-of-rotation device permits a phase change in the unlocked state, wherein the angle-of-rotation device can be transferred from the locked state to the unlocked state by application of a pressure medium, wherein the control valve has a valve housing and Control piston, wherein exactly one input port, at least one outlet port, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/344
CPCF01L1/3442F01L2001/34426
Inventor 延斯·霍佩安德烈亚斯·勒尔
Owner SCHAEFFLER TECH AG & CO KG
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