Vehicle Idle Control System for Reducing Fuel Consumption
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Solution Overview
Problem
Internal combustion engines, particularly diesel engines, produce significant emissions and waste products when idling, leading to environmental and health issues, and increased fuel consumption, especially in semi-tractor trailers where engines are often left running for climate control and auxiliary device operation.
Innovation Solution
An idle control system that includes a central control unit connected to a monitor and the vehicle's starter, LVD switch, and HVAC system, which periodically starts and stops the engine to maintain cab temperature and charge batteries, using auxiliary devices powered by batteries to reduce engine operation and emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the engine is left running to maintain cab temperature and power auxiliary devices, then climate control and auxiliary device operation are maintained, but fuel consumption and emissions increase
Solution Approach 1:
The control system periodically cycles the engine between running and stopped states. The engine is started to charge the battery and maintain cab temperature, then stopped to reduce fuel consumption. This periodic cycling optimizes the balance between energy availability and emissions reduction.
Solution Approach 2:
The battery serves as an intermediary energy storage device between the engine and the auxiliary devices/HVAC system. The engine charges the battery when running, and the battery powers auxiliary devices when the engine is stopped, enabling engine shutdown without immediate loss of power to climate control or auxiliary devices.
2Object-generated harmful factors
If the engine is stopped to reduce emissions and fuel consumption, then environmental impact and fuel usage decrease, but cab temperature control and auxiliary device operation are compromised
Solution Approach 1:
The system performs preliminary action by charging the battery to a sufficient level before stopping the engine. The control system monitors battery charge state and ensures adequate energy reserves are stored beforehand, so when the engine stops, the battery can immediately take over powering the HVAC system and auxiliary devices without interruption.
Solution Approach 2:
The control system continuously monitors multiple parameters including battery charge state, cab temperature, and engine operation status. Based on this feedback, the controller dynamically adjusts engine cycling decisions to maintain climate control reliability while minimizing emissions. The system learns from operational patterns to optimize engine restart timing.
3Loss of energy
If the engine is frequently started and stopped to reduce idling time, then fuel consumption and emissions are reduced, but system complexity and control requirements increase
Solution Approach 1:
The control system integrates multiple functions into a single controller unit that manages engine operation, battery charging, HVAC control, and auxiliary device monitoring. This multi-functional approach consolidates what could be separate complex systems into one coordinated controller, reducing overall system complexity while achieving fuel savings through intelligent engine cycling.
Data Source
AI summary
An idle control system for a vehicle is provided.