Actuator for Axial Displacement Using Slave Piston Valve Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing actuators for axial displacement in internal combustion engines face challenges with slow transition from closed to open inlet channels and excessive pressure fluid leakage, leading to inefficient energy consumption and draught issues.
Innovation Solution
The actuator design incorporates a slave piston that rapidly displaces a seat valve body to immediately open the inlet channel, eliminating leakage by using a seat valve body and an electrically controlled pilot valve to manage pressure fluid flow, with a second inlet valve body connected to the actuator piston disc to control pressure fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a slide valve body is used to control inlet and outlet channels, then the valve can be driven by an electromagnet, but the slide valve body has great mass that counteracts fast acceleration and causes slow transition from closed to open inlet channel
Solution Approach 1:
The patent divides the valve control system into separate components: a light pilot valve body for controlling the outlet channel and a separate seat valve body for controlling the inlet channel. This segmentation allows the pilot valve to be rapidly actuated by the electromagnet while the heavier seat valve body is opened only after the outlet is closed, resolving the contradiction between fast response and the need to prevent drafts.
Solution Approach 2:
The pilot valve body performs preliminary action by closing the outlet channel before the inlet channel is opened. This preliminary closure of the outlet prevents drafts during the subsequent opening of the inlet channel, allowing the system to achieve fast inlet opening without the harmful effect of simultaneous outlet opening.
2Productivity
If the slide valve body is used, then the inlet channel can be opened, but draught occurs when the seat valve body is in motion causing inlet open while outlet still open leading to pressure fluid passing straight through without performing useful work
Solution Approach 1:
The pilot valve body closes the outlet channel in advance before the seat valve body opens the inlet channel. This preliminary action ensures that the outlet is sealed prior to inlet opening, preventing drafts where pressure fluid would pass straight through without performing useful work, while still maintaining the capability to open the inlet channel when needed.
Solution Approach 2:
The pilot valve body acts as an intermediary mechanism that mediates between the electromagnet actuation and the main seat valve body. It first closes the outlet channel as an intermediate step, then allows the inlet channel to open, thereby preventing direct drafts while maintaining productive fluid flow control.
3Reliability
If the slide valve body design is used, then the valve can be actuated, but unnecessary long displacement is required to prevent draught which takes time and consumes unnecessary amounts of pressure fluid
Solution Approach 1:
The valve control is segmented into two independent valve bodies: the pilot valve body for outlet control and the seat valve body for inlet control. This segmentation allows each valve to be optimally sized and positioned, enabling the pilot valve to quickly close the outlet without requiring the lengthy displacement that would be needed if a single large slide valve had to perform both functions sequentially.
Solution Approach 2:
The pilot valve body serves as an intermediary that handles the outlet closure function separately from the main inlet control. This intermediary arrangement allows the outlet to be closed quickly by a small, fast-responding valve rather than requiring the main valve to travel a long distance to achieve the same effect.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design significantly reduces the time to fully open the inlet channel and eliminates pressure fluid leakage, enhancing energy efficiency by ensuring the inlet channel is only open when necessary, thereby minimizing unnecessary pressure fluid consumption.
Implementation Method 1
a slave piston that is displaceable back and forth in a bore between an inactive position and an active position, and in that the first inlet valve body is constituted by a seat valve body having an inactive position at which the inlet channel is closed, the slave piston being configured to during its movement from the inactive position to the active position ram said first inlet valve body and displace it to an active position at which the inlet channel is open
Implementation Method 2
an electrically controlled pilot valve to manage pressure fluid flow
Implementation Method 3
an actuator piston disc and a cylinder volume, the actuator piston disc separating said cylinder volume in a first portion and a second portion
Data Source
AI summary
Disclosed is an actuator including a cylinder volume having a first portion, and an actuator piston disc displaceable in the cylinder between inactive and active positions, an inlet channel between a pressure fluid inlet and the first portion of the cylinder volume, a first inlet valve body in the inlet channel, an outlet channel between the first portion of the cylinder volume and a pressure fluid outlet, and an outlet valve body in the outlet channel. The slave piston is displaceable in a bore between inactive and active positions. The first inlet valve body includes a seat valve body having an inactive position closing the inlet channel, the slave piston, in moving from inactive to active positions, rams the first inlet valve body, displacing it to an active position at which the inlet channel is open, the outlet valve body being connected to and jointly displaceable with the slave piston.