Vehicle Upshift Prediction Using Battery Charge Management

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Solution Overview

Problem

Large vehicles with transmissions experience upshift lag due to reduced regeneration capability, which lacks alternative means to reduce motor torque during upshifts, leading to synchronization delays and inefficiencies.

Innovation Solution

A method for predicting upshift requests based on driving patterns, traffic conditions, and battery charge levels to control power consumption, allowing for timely synchronization of motor and gear components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If regeneration is used to reduce motor torque during upshift, then motor synchronization is achieved, but upshift lag occurs when battery charge limit is low

Engineering Contradiction:

Improvemotor synchronizationVSAvoidupshift lag

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary actions by predicting future upshift requests based on driving patterns and traffic conditions. When an upshift is predicted, the control unit proactively manages battery charge levels and power consumption before the actual upshift occurs, ensuring the battery is ready to accept regeneration energy and eliminate synchronization delays.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts power consumption of auxiliary devices based on predicted upshift timing and battery state. The control unit continuously monitors driving conditions, battery charge limits, and predicted upshift requests to optimize the balance between power consumption and charge availability, enabling flexible adaptation to varying operational requirements.

Inventive Principle:

Principle #15Dynamics

2Quantity of substance

If power-consuming devices are used to increase allowable charge amount, then battery charge limit is increased, but considerable time is required to consume enough power

Engineering Contradiction:

Improveallowable charge amountVSAvoidtime to consume power

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

The system performs preliminary power consumption actions by activating power-consuming devices before predicted upshift events. Based on predicted upshift requests and current battery charge levels, the control unit proactively consumes power to create charge capacity, ensuring the battery is prepared to accept regeneration energy when the upshift occurs, thereby eliminating upshift lag.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback control by continuously monitoring battery charge levels, driving conditions, and predicted upshift requests. The control unit adjusts power consumption of auxiliary devices based on real-time battery state and predicted energy recovery opportunities, optimizing the timing and magnitude of power consumption to ensure charge availability without excessive time delay.

Inventive Principle:

Principle #23Feedback

3Force

If service brake is used to reduce motor torque, then torque reduction is achieved, but it cannot be utilized for upshift sequence

Engineering Contradiction:

Improvemotor torqueVSAvoidapplicability to upshift

Core Design Contradiction:

ForceVSAdaptability or versatility

Solution Approach 1:

The system achieves multi-functionality by using the service brake system not only for traditional braking purposes but also for active power consumption to manage battery charge levels. The control unit coordinates service brake activation with predicted upshift events, enabling the brake system to serve dual functions: speed control and charge management, thereby making torque reduction capabilities applicable to upshift sequences.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Minimizes upshift lag by optimizing battery charge levels and power consumption, ensuring smooth and efficient gear transitions.

Implementation Method 1

a motor unit configured to generate a driving force of the vehicle by receiving power from a battery

Methodology Applied

Scientific EffectElectromagnetic conversion: Electromagnetic Induction

Implementation Method 2

A method for predicting upshift requests based on driving patterns, traffic conditions, and battery charge levels to control power consumption

Methodology Applied

Scientific EffectPrediction based on driving patterns:

Data Source

PatentUS12570158B2Method for shift using shift entry prediction and vehicle therefor

Publication Date: 2026.03.10 HYUNDAI MOTOR CO LTD

AI summary

Disclosed herein a method for upshifting the transmission of a vehicle using shift entry prediction. The method may comprise predicting whether or not an upshift request of a vehicle will occur, determining whether or not a charge demand required for a battery through regeneration for upshift is greater than an allowable charge amount of the battery when the upshift request is predicted, controlling power consumption of the battery when the charge demand is greater than the allowable charge amount, and processing the upshift in response to an actual request of the upshift.