Arithmetic Processing Unit Signal Routing for Low Latency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand for a vehicle control apparatus that can process and output signals from crank rotation angle and cam angle sensors to an arithmetic processing unit while minimizing delay, as existing technologies face challenges in maintaining low signal delay and addressing timing gaps between sensor signals.
Innovation Solution
The apparatus includes an arithmetic processing unit with dedicated input and output ports for sensor signals, allowing for direct processing and output of these signals without significant delay, using a configuration that includes a driver IC and pull-up circuits to ensure low-side switch control and prevent signal collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor signals are processed through conventional signal processing circuits, then signal processing capability is improved, but signal delay increases
Solution Approach 1:
The patent divides the signal processing function into two separate paths: one path for arithmetic processing (through the arithmetic processing unit) and another path for direct output (through the output port). This segmentation allows the sensor signal to be processed arithmetically while simultaneously being output with minimal delay, resolving the contradiction between processing capability and signal delay.
2Measurement precision
If multiple cam angle sensor signals are used for control processing, then control accuracy is improved, but signal timing synchronization becomes more difficult
Solution Approach 1:
The patent implements a universal output interface that can handle multiple cam angle sensor signals (CAM1, CAM2, etc.) through the same output port structure. Each sensor signal has its own dedicated input port and output port pair, allowing multiple signals to be processed and output simultaneously without timing synchronization issues, while maintaining the ability to perform arithmetic processing on any of them.
Data Source
AI summary
Provided is a vehicle control apparatus which can output, to the outside, a signal input from a sensor to an arithmetic processing unit while keeping delay at a lower level. An ECU (vehicle control apparatus) includes an arithmetic processing unit having a pair of an input port and an output port assigned to a sensor signal indicating a signal output from a sensor. The arithmetic processing unit performs arithmetic processing by using the sensor signal input from the input port, and outputs the sensor signal from the output port.