Vehicle Relay Communication Blocking After Ignition Off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle control systems experience unnecessary power consumption due to external devices continuously making communication requests even when the vehicle's ignition is off, keeping ECUs in a normal operation state.
Innovation Solution
A relay apparatus with a communication processor that blocks communication between external devices and ECUs after the vehicle's ignition transitions to the off state, preventing unnecessary power consumption by maintaining ECUs in a power-saving state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the relay apparatus allows continuous communication requests from external devices, then the ECU remains in a normal operation state to respond to requests, but unnecessary power consumption occurs when the ignition is off
Solution Approach 1:
The relay apparatus dynamically changes the communication state based on ignition status. When ignition is on, communication is enabled allowing ECU to respond to external devices. When ignition is off, communication is automatically blocked, allowing ECU to enter power-saving state. This dynamic adaptation resolves the contradiction between maintaining response capability and reducing power consumption.
Solution Approach 2:
The system changes the communication parameter (blocked/not blocked) based on the ignition state parameter. This parameter change mechanism allows the ECU to transition between operational states accordingly, achieving both reliable response when needed and power savings when ignition is off.
2Use of energy by moving object
If the relay apparatus blocks communication after ignition transitions to off state, then power consumption is reduced by maintaining ECUs in power-saving state, but communication with external devices is prevented
Solution Approach 1:
The communication blocking feature is not static but dynamically controlled by ignition status. The system adapts communication availability to match the operational context - fully available when ignition is on, automatically blocked when ignition is off. This dynamic behavior resolves the contradiction between power savings and communication availability.
Solution Approach 2:
The relay apparatus acts as an intermediary between external devices and ECUs. It mediates communication requests by checking ignition status and either allowing or blocking requests accordingly. This intermediary function enables the system to achieve power savings without losing communication capability when actually needed.
3Reliability
If ECUs are maintained in normal operation state to respond to external device requests, then communication reliability is ensured, but energy is wasted when the vehicle ignition is off
Solution Approach 1:
The relay apparatus performs preliminary action by checking the ignition status before allowing communication requests to reach the ECU. This preliminary check prevents unnecessary communication attempts when ignition is off, avoiding both energy waste and potential communication issues, thus resolving the contradiction between reliability and energy efficiency.
Solution Approach 2:
The system uses feedback from the ignition status to control communication blocking. The relay apparatus continuously monitors ignition state and adjusts communication blocking accordingly - no blocking when ignition is on, automatic blocking when ignition is off. This feedback mechanism ensures communication reliability when needed while preventing energy waste when not needed.
Data Source
AI summary
A relay apparatus is to be applied to a vehicle. The relay apparatus is configured to relay a communication between an external device provided outside the vehicle and an electronic control unit mounted on the vehicle. The relay apparatus includes an external communication connector and a communication processor. The external communication connector is configured to communicably couple the external device. The communication processor is configured to control the communication between the external device coupled to the external communication connector and the electronic control unit. The communication processor is configured to block the communication between the external device and the electronic control unit after an ignition of the vehicle makes a transition to an off state.