Waveform Signal Output Device for Solenoid Valve Distortion Prevention
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Solution Overview
Problem
Existing waveform signal output devices for solenoid valves suffer from distortion phenomena due to delayed data reading from memory, leading to control defects in vehicle systems.
Innovation Solution
A waveform signal output device with a waveform distortion determination unit that compares the requested renewal time with a preset communication prohibition section to assess distortion possibility, allowing only non-distorted waveform data renewal and output, thereby preventing signal distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If waveform data is read from memory and output as a waveform signal, then the solenoid valve can be driven according to driving commands, but distortion occurs in the waveform signal due to delayed data reading
Solution Approach 1:
The patent applies preliminary action by determining whether waveform data renewal is possible before actually performing the renewal operation. The waveform distortion determination unit checks if the current time point falls within a communication prohibition section before allowing memory updates, preventing distortion proactively rather than correcting it after occurrence.
2Adaptability or versatility
If waveform data is renewed using new driving commands, then the waveform signal can be updated to reflect new driving modes, but distortion occurs when renewal happens during communication prohibition sections
Solution Approach 1:
The patent implements feedback by having the waveform distortion determination unit continuously monitor the timing of waveform data renewal requests and compare them against the communication prohibition section timing. This feedback mechanism prevents renewal operations during critical periods when the signal output unit is actively reading memory, ensuring that updates only occur when safe.
3Reliability
If the communication prohibition section is extended to prevent distortion, then waveform signal accuracy improves, but the waveform renewal period increases
Solution Approach 1:
The patent applies partial action by implementing selective waveform data renewal - not all renewal requests are executed, only those that occur outside the communication prohibition section. This partial renewal approach prevents distortion while maintaining the fastest possible renewal rate that ensures signal accuracy.
Data Source
AI summary
The waveform signal output device includes: a signal output unit that reads waveform data recorded in a memory and outputs a waveform signal for driving the solenoid valve according to a waveform renewal signal; a waveform generation unit that generates waveform data for driving the solenoid valve using vehicle driving information and requests renewal of a waveform by outputting the waveform data; a waveform distortion determination unit that compares a time point when the renewal of a waveform is requested and a preset communication prohibition section and determines a possibility of distortion of the waveform signal; and a driving command unit that renews waveform data of the memory using the waveform data generated by the waveform generation unit and outputs a waveform renewal signal if it is determined that there is no possibility of distortion.