Brake Duct Backflow Plate for Radiator and Brake Cooling

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Solution Overview

Problem

Existing brake cooling systems in vehicles suffer from reduced radiator performance due to backflow of hot air when the vehicle is stopped, which compromises the cooling efficiency of the brakes during travel.

Innovation Solution

Incorporation of a backflow suppression plate in the brake ducts that protrudes from the center side plate or rear plate of the radiator air guide duct, preventing hot air from flowing back into the radiator by guiding it away from the upstream side, while ensuring adequate cooling of the brakes during travel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a brake cooling duct is provided to guide cooling air from the radiator to the brake, then brake cooling performance is improved, but hot air flows back through the duct when the vehicle is stopped, deteriorating radiator performance

Engineering Contradiction:
Improvebrake temperatureVSAvoidradiator cooling performance
Core Design Contradiction:
TemperatureVSTemperature

Solution Approach 1:

The harmful backflow of hot air is extracted and redirected away from the radiator by introducing a backflow suppression plate. This plate protrudes into the brake cooling duct to create a separation, directing hot air toward the vehicle exterior while maintaining the cooling air passage to the brake.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The backflow suppression plate acts as an intermediary element within the brake cooling duct. It mediates between the cooling air flow and hot air backflow, allowing cooling air to pass through to the brake while blocking and redirecting hot air away from the radiator inlet.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Temperature

If the brake cooling duct is blocked to prevent hot air backflow, then radiator performance is maintained, but brake cooling function is lost when the vehicle is traveling

Engineering Contradiction:
Improveradiator cooling performanceVSAvoidbrake cooling capability
Core Design Contradiction:
TemperatureVSTemperature

Solution Approach 1:

The brake cooling duct is segmented into separate flow paths by the backflow suppression plate. One path allows cooling air to reach the brake, while another directs hot air away from the radiator. This segmentation enables simultaneous achievement of both radiator performance maintenance and brake cooling function.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different regions of the brake cooling duct are given different functions through the backflow suppression plate. The region upstream of the plate handles cooling air intake, while the region downstream manages hot air exhaust. This local differentiation of function resolves the contradiction between preventing backflow and maintaining cooling.

Inventive Principle:
Principle #3Local quality

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

The backflow suppression plate effectively suppresses the backflow of hot air, maintaining radiator performance and ensuring efficient brake cooling during vehicle operation, thereby enhancing overall cooling efficiency.

Implementation Method 1

The backflow suppression plate protrudes from a center side plate of the brake duct or a rear plate of the radiator air guide duct toward an inner side of the brake duct. The backflow suppression plate is configured to suppress hot air after passing through the radiator from flowing back through the brake duct and from flowing toward an upstream side of the radiator.

Methodology Applied
Scientific EffectFluid flow direction control:

Data Source

PatentUS12420627B2Vehicle
Publication Date: 2025.09.23 TOYOTA JIDOSHA KK
  • US12420627B2 patent drawing
  • US12420627B2 patent drawing
  • US12420627B2 patent drawing

AI summary

A vehicle includes: a grille opening through which cooling air is introduced; a radiator air guide duct that guides cooling air introduced from the grille opening to a radiator; and a left brake duct that is connected to both ends of the radiator air guide duct in the vehicle width direction and guides a part of the flowing cooling air toward the brake of the front wheel, wherein the vehicle includes a backflow suppression plate protruding from a center side plate of the left brake duct toward the inside of the left brake duct.