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Control apparatus for variable valve actuation system and control method for variable valve actuation system

A valve actuation system and control equipment technology, applied in electrical control, engine control, mechanical equipment, etc., can solve problems such as a large amount of time

Inactive Publication Date: 2013-07-31
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, all prior art techniques require a considerable amount of time to determine whether there is a fixed

Method used

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  • Control apparatus for variable valve actuation system and control method for variable valve actuation system
  • Control apparatus for variable valve actuation system and control method for variable valve actuation system
  • Control apparatus for variable valve actuation system and control method for variable valve actuation system

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Embodiment Construction

[0040] will refer to Figure 1 to Figure 7 An embodiment of a control apparatus for a variable valve actuation system embodying the present invention will be described in detail below. as in figure 1 As shown in , a cylinder head 2 of an internal combustion engine is provided with a pair of exhaust valves 10 and a pair of intake valves 20 for each cylinder.

[0041] The exhaust valve actuation system that drives the exhaust valves 10 is provided with a lash adjuster 12 for each exhaust valve 10 respectively. A rocker arm 13 is supported between each lash adjuster 12 and a corresponding one of the exhaust valves 10 . One end of each rocker arm 13 is supported by a corresponding one of the lash adjusters 12 , and the other end of the rocker arm 13 is in contact with the base end portion of the corresponding exhaust valve 10 . Furthermore, the exhaust camshaft 14 rotatably supported by the cylinder head 2 is provided with as many cams 15 as the exhaust valves 10 . The outer ...

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PUM

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Abstract

In a variable valve actuation system capable of changing the angle of action of intake valves by using an actuator whose movement range is between a high end and a low end at which the movement of the actuator is mechanically stopped, it is determined that a fixation is present on condition that the actual amount of movement of the actuator in response to a command A for movement toward the low end that is issued when the present movement position of the actuator is unknown is not more than a prescribed movement criterion value a and that the actual amount of movement in response to a command B output subsequently to the command A in order to cause the actuator to operate in a direction opposite to the direction of the movement in response to the command B is not more than a prescribed movement criterion value b.

Description

technical field [0001] The present invention relates to an apparatus and method for controlling a variable valve actuation system capable of changing the valve characteristics of an engine valve by using an actuator whose A range of movement is between a first end and a second end, and movement of the actuator is mechanically stopped at each of the first and second ends. Background technique [0002] As a system installed for an internal combustion engine installed in a vehicle or the like, there is a commercialized variable valve actuation system that changes valve characteristics of engine valves (intake valves and exhaust valves). As such a variable valve actuation system, a system capable of changing an operating angle of an engine valve is known. [0003] Figure 8 An example of a variable valve actuation system capable of changing the operating angle of a valve is shown. The variable valve actuation system includes an actuator 103 composed of an electric motor 100 an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02D41/22F01L1/344F02D41/24
CPCF01L1/34Y02T10/42F01L2001/186F02D2041/001F02D41/2438F01L2800/11F02D41/0002F02D41/221F02D41/2464F01L2800/00F01L2820/032Y02T10/40
Inventor 中川崇山本俊介
Owner TOYOTA JIDOSHA KK