Refuse Vehicle Dual CAN Architecture for Body-Chassis Isolation
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Solution Overview
Problem
Existing refuse vehicles lack an efficient and segregated communication system for managing body and chassis operations, leading to potential communication bottlenecks and errors in controlling various components.
Innovation Solution
Implementing a dual CAN bus system, where a first CAN bus manages body functions and a second CAN bus manages chassis functions, with a telematics module to monitor and transmit communications to a cloud computing system, ensuring separate and parallel operations without direct communication between the two buses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single CAN bus is used for both body and chassis functions, then device complexity is reduced, but communication reliability and error reduction are worsened due to potential communication bottlenecks and errors
Solution Approach 1:
The communication system is segmented into two separate CAN buses: a first CAN bus for body functions and a second CAN bus for chassis functions. This segmentation isolates communication traffic, preventing bottlenecks and errors from affecting both systems simultaneously, thereby improving communication reliability while maintaining manageable complexity through modular architecture
2Reliability
If a dual CAN bus system is implemented with separate body and chassis communication, then communication reliability and error reduction are improved, but device complexity increases
Solution Approach 1:
The system segments communication into dedicated body and chassis buses, improving reliability through isolation. The body controller and telematics module are designed to handle both buses, but the segmentation itself simplifies the overall system by preventing cross-interference and making故障 isolation easier
Solution Approach 2:
The body controller is designed with multi-functionality to communicate with both the first CAN bus (body functions) and the second CAN bus (chassis functions). This universal controller reduces the need for additional dedicated controllers, thereby managing system complexity while maintaining the reliability benefits of separate communication buses
3Ease of operation
If body and chassis communications are integrated on one bus, then ease of operation is improved, but communication bandwidth and efficiency are worsened due to bottlenecks
Solution Approach 1:
Communication bandwidth is improved by segmenting traffic into dedicated body and chassis buses, allowing simultaneous high-speed communication for both systems without contention. The body controller manages both buses efficiently, maintaining ease of operation through unified control logic while achieving high productivity through parallel communication channels
Data Source
AI summary
A refuse vehicle includes a first controller area network (CAN) bus for body functions of the refuse vehicle. The refuse vehicle also includes multiple controllable elements of a body of the refuse vehicle communicably coupled with the first CAN bus. The refuse vehicle includes a second CAN bus for chassis functions of the refuse vehicle. The refuse vehicle includes multiple controllable elements of a chassis of the refuse vehicle communicably coupled with the second CAN bus. The refuse vehicle includes a telematics module communicably coupled with both the first CAN bus and the second CAN bus. The telematics module is configured to monitor communications on both the first CAN bus and the second CAN bus and transmit the communications to a cloud computing system. The first CAN bus and the second CAN bus are communicatively separate and do not communicate with each other directly.