Hybrid Vehicle Catalyst Heating to Restore Braking Energy Recovery
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Solution Overview
Problem
In hybrid vehicles, braking energy cannot be recovered and supplied to the battery when it is fully charged, leading to a loss of braking recovery function.
Innovation Solution
An electronic device and control method that acquires the state of charge of the battery and controls a heater to consume battery power and reduce the state of charge, thereby restoring the braking recovery function by heating the catalyst of an after-treatment device when the battery is fully charged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the battery is fully charged, then the energy storage capacity is maximized, but the braking recovery function cannot be restored and braking energy cannot be recovered
Solution Approach 1:
The system performs preliminary heating of the catalyst using the heater when the battery state of charge is high, preparing the after-treatment device for optimal operation. This preliminary action consumes excess battery energy while ensuring the catalyst is ready for efficient exhaust gas purification, thereby enabling subsequent braking energy recovery without compromising purification performance.
Solution Approach 2:
The system converts the harmful effect of excess battery charge (which prevents braking energy recovery) into a beneficial effect by using the excess energy to heat the catalyst. The heater transforms wasted battery energy into useful thermal energy for the after-treatment device, simultaneously reducing battery charge level to enable braking recovery and ensuring optimal catalyst temperature for exhaust gas purification.
2Reliability
If the heater is driven to heat the catalyst, then the after-treatment device purification efficiency is improved, but the battery state of charge decreases
Solution Approach 1:
The control device monitors the battery state of charge parameter and adjusts the heater operation accordingly. When the state of charge is above a predetermined threshold, the system activates the heater to consume excess energy, thereby changing the battery charge level parameter to an optimal range that enables both effective catalyst heating and subsequent braking energy recovery.
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
Effectively restores the braking recovery function by utilizing excess battery energy to heat the catalyst, improving the vehicle's energy management and reducing battery charge levels when full, thus enabling efficient energy reuse.
Implementation Method 1
a control part that controls driving of a heater that raises a temperature of a catalyst of an after-treatment device
Implementation Method 2
a generator performing recovery power generation and is charged by the generator
Data Source
AI summary
An electronic device includes: an acquiring part that acquires a state of charge of a battery that is electrically connected to a motor performing recovery power generation and is charged by the motor, and a control part that controls the driving of a heater that raises the temperature of a catalyst of an after-treatment device that purifies exhaust gas discharged from an engine. The control part drives the heater so that the heater is heated by the electric power of the battery if the state of charge of the battery acquired by the acquiring part is equal to or greater than a first threshold.