Electric Pump Control Bus for Shared PWM and Feedback Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing control systems for electric pumps in vehicles have complex connections due to separate signal lines for control and feedback signals, leading to a cumbersome structure and potential interference, which complicates accurate and timely control of the pump's operation.
Innovation Solution
A control system that uses a single signal line for both control and feedback signals, where the master controller sends PWM control signals to the microprocessor, which analyzes the operation state and feeds back information to the master controller, allowing for timely and accurate regulation of the pump's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate signal lines are used for control and feedback signals, then signal interference is prevented, but system connection complexity increases
Solution Approach 1:
The patent combines control signal transmission and feedback signal reception into a single communication bus, replacing the traditional separate signal line architecture. This merging approach reduces the number of physical connections and simplifies the overall system structure while maintaining reliable communication through protocol-based signal differentiation.
Solution Approach 2:
The communication bus is designed to serve multiple functions: transmitting control signals from the master controller to the microprocessor and receiving feedback signals from the microprocessor to the master controller. This multi-functional design eliminates the need for dedicated separate lines for each direction of communication.
2Device complexity
If a single signal line is used for both control and feedback, then system structure is simplified, but signal interference may occur
Solution Approach 1:
The patent segments the communication protocol into distinct phases: a control signal transmission phase and a feedback signal reception phase. By temporally separating these functions on the shared bus, the system prevents signal interference while maintaining the simplicity of a single physical connection.
Solution Approach 2:
The system implements a structured feedback mechanism where the microprocessor receives control signals, processes them, and returns status information through the same bus. This feedback loop is carefully timed and protocol-managed to ensure that feedback signals do not interfere with ongoing control signal transmissions.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed is a control system for controlling the operation of an execution unit, the control system comprising a main controller ECU, a microprocessor unit MCU and a signal line BUS, wherein the main controller ECU sends a control signal, the control signal is transmitted to the microprocessor unit MCU via the signal line BUS, the microprocessor unit MCU sends the control signal to the execution unit, and the execution unit is driven for operation. At the same time, the microprocessor unit MCU collects a feedback signal representing a running state of the execution unit for a certain time interval and transmits the feedback signal to the signal line BUS, the main controller ECU collects a feedback signal of the signal line BUS, and the main controller ECU judges the running state of the execution unit according to the feedback signal and emits the corresponding control signal. In this way, the system reduces the number of interfaces and has a more simple structure.