Hybrid Vehicle Engine Start Logic During Remote Smart Parking
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Solution Overview
Problem
Conventional hybrid electric vehicles (HEVs) often start the engine unnecessarily, leading to discomfort due to sudden engine start sounds and exhaust gas emissions, especially when the vehicle is parked for extended periods or when only luggage is being moved.
Innovation Solution
A hybrid vehicle control method that activates a remote smart parking assist function, determines whether to start the engine based on the vehicle's state, sets an electric motor driving mode when engine start is not possible, and releases this mode when a riding determination condition is met, ensuring the engine is only started when the driver or passenger is present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the engine is started when the vehicle is parked for extended periods or when only luggage is being moved, then catalyst heating can be performed to reduce exhaust gas, but sudden engine start sounds and exhaust gas emissions cause discomfort to the driver or passenger
Solution Approach 1:
The control unit changes the operating parameters of the hybrid vehicle by selectively enabling or disabling engine start based on the detected parking duration and vehicle state. When the vehicle is determined to be in a remote smart parking state (parked for extended period), the control unit prevents engine start despite catalyst heating needs, thereby eliminating engine noise and exhaust emissions during these specific conditions.
2Object-affected harmful factors
If the engine is started before the driver or passenger gets into the vehicle, then catalyst heating can be performed, but sudden engine start sounds and exhaust gas emissions cause discomfort
Solution Approach 1:
The control unit performs preliminary detection of the vehicle state (whether it is in remote smart parking mode) before allowing engine start. By detecting the parking duration and vehicle state in advance, the control unit prevents engine start before the driver enters, thereby avoiding unnecessary noise and emissions while still enabling catalyst heating when appropriate.
3Object-affected harmful factors
If the engine is unnecessarily started when only luggage is picked up, then catalyst heating can be performed, but fuel consumption increases and driver comfort decreases
Solution Approach 1:
The control unit changes the operational parameters by disabling engine start when the vehicle state indicates remote smart parking (luggage pickup only). This parameter change prevents unnecessary fuel consumption while the control unit monitors and maintains catalyst heating functionality when the engine is actually needed.
Data Source
AI summary
Disclosed herein is a method of controlling an engine start in a hybrid vehicle. The method comprises activating a remote smart parking assist (RSPA) function when a remote smart assist signal is received, determining whether to start an engine of a hybrid vehicle based on a current state of the hybrid vehicle in which the RSPA function is activated, setting a first driving mode using an electric motor when it is determined that the engine is not able to be started, and releasing the first driving mode when a riding determination condition is satisfied in a state of the first driving mode.