Motor Vehicle Pre-Heating Triggered by Driver Departure Intent
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pre-heating methods for motor vehicles' exhaust-gas post-treatment systems and lambda probes often result in unnecessary energy consumption, leading to reduced battery capacity and potential operational failures due to lack of explicit driver intent, especially when departures are not intended.
Innovation Solution
A method where the driver explicitly announces their intention to depart using a transducer, triggering pre-heating measures only when necessary, incorporating motor-external heating methods like electric resistance heating and exhaust-gas burners, and adjusting based on available energy and temperature conditions to optimize operating temperatures before engine start.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pre-heating measures are performed automatically when the driver enters the vehicle, then the exhaust-gas post-treatment system reaches operating temperature faster, but unnecessary energy consumption occurs when departure is not intended
Solution Approach 1:
The system performs preliminary pre-heating actions when the driver enters the vehicle, but this action is made reversible and conditional. The driver can cancel the pre-heating process by entering the vehicle again, allowing the system to prepare in advance while remaining adaptable to changing driver intentions.
Solution Approach 2:
The system continuously monitors driver presence and vehicle state to provide feedback control. When the driver enters the vehicle, the system detects this state change and either initiates or terminates pre-heating measures based on whether a departure is intended, thereby optimizing energy usage while maintaining system readiness.
2Object-generated harmful factors
If pre-heating measures are performed before departure, then emissions are minimized from the start, but the battery charge level may drop below minimum capacity
Solution Approach 1:
The system applies partial pre-heating action by heating the exhaust-gas post-treatment system to a temperature that is sufficient for emission control but not necessarily to full operating temperature. This partial heating reduces energy consumption while still achieving the primary goal of minimizing emissions.
Solution Approach 2:
The system performs preliminary heating actions that are sufficient to enable immediate emission control upon departure, without completing full thermal ramp-up. This allows the system to address emissions concerns while preserving battery capacity for essential vehicle operations.
3Temperature
If the idling rotating speed is increased for motor-internal heating, then exhaust-gas temperature increases rapidly, but fuel consumption increases
Solution Approach 1:
The system uses periodic or intermittent heating measures rather than continuous high-idle operation. The idling rotating speed is increased only for brief periods sufficient to raise exhaust-gas temperature to the required level, then reduced to normal operating speed, thereby limiting fuel consumption while achieving thermal targets.
Solution Approach 2:
The system performs preliminary heating by increasing idling rotating speed only long enough to bring the exhaust-gas post-treatment system to minimum operating temperature. Once this threshold is reached, the heating action is terminated, avoiding excessive fuel consumption while ensuring emission control capability is established.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach prevents unnecessary energy consumption, ensures pre-heating only when intended departures are planned, maintaining battery capacity and enabling efficient exhaust-gas post-treatment system operation, adhering to stringent emission standards.
Implementation Method 1
motor-external heating measures, in particular electric resistance heating
Implementation Method 2
exhaust-gas burner for increasing the exhaust-gas temperature
Data Source
AI summary
In a method for operating a motor vehicle having an internal combustion engine, pre-heating measures (7) for reaching operating temperatures for components of the exhaust-gas post-treatment system and/or for a lambda probe of the motor vehicle are provided prior to the departure (10) of the motor vehicle. The activation of a transducer (1) by a driver of the motor vehicle for explicitly announcing an impending departure of the motor vehicle is provided as the trigger for the pre-heating measures (7), in particular for avoiding an unnecessary initiation of pre-heating measures.