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System for controlling the response time of a hydraulic system

A control system and response time technology, applied to non-mechanically actuated valves, valve devices, machines/engines, etc., can solve problems such as wear and damage of engine components, increase engine hydraulic system changes, etc.

Inactive Publication Date: 2008-01-02
GM GLOBAL TECH OPERATIONS LLC
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

These factors increase hydraulic system variation between engines and promote wear and damage to engine components

Method used

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  • System for controlling the response time of a hydraulic system
  • System for controlling the response time of a hydraulic system
  • System for controlling the response time of a hydraulic system

Examples

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Embodiment Construction

[0022] The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention and its application or uses. For purposes of clarity, the same reference numbers will be used in the drawings to refer to similar elements. As used herein, the term "module" refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or grouped) and memory, combinational logic, that executes one or more software or firmware programs Circuitry and / or other suitable components that provide the described functionality.

[0023] Referring to FIG. 1 , an exemplary vehicle 10 includes an engine 12 , a transmission 14 and an engine control module (ECM) 16 . Operation of the two-stage switching roller finger follower (SRFF) mechanism 28 is controlled by a control valve (CV) 30 which controls the fluid supply (not shown) to the hydraulic lash adjuster 29 . The ECM 16 monitors the operation ...

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Abstract

A control system and method for a hydraulic system (HS) that controls a fluid supply in an engine includes a timer module determines the response time of the HS to perform at least one of: increasing the pressure of the fluid supply above a predetermined threshold following the state change command and decreasing said pressure of said fluid supply below said predetermined threshold following said state change command. An update module updates the desired time of the HS based on the response time of the HS.

Description

technical field [0001] The present invention relates to internal combustion engines, and more particularly to a system for controlling the response time of a hydraulic system. Background technique [0002] The intake valve controls the admission of an air / fuel mixture into the cylinders of the internal combustion engine. The exhaust valve controls the gases that are expelled from the cylinders of the internal combustion engine. Cam lobes (or "cam lobes") on the camshaft push against the valves to open them as the camshaft turns. A spring on the valve returns the valve to the closed position. The timing, duration and degree of opening of the valves, or "valve lift," affects performance. [0003] As the camshaft turns, the cam lobes open and close the intake and exhaust valves in time with the movement of the pistons. There is a direct relationship between the shape of the cam lobe and how the engine operates at different speeds and loads. When operating at low speeds, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L9/02
CPCF01L1/185F01L2820/033F01L2105/00F01L1/2405F01L2820/01F01L2800/00F01L13/0036F01L13/0005F01L2001/186F01L2305/00
Inventor R·J·皮里克
Owner GM GLOBAL TECH OPERATIONS LLC
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