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Introduction of front brake disc, front brake caliper, front brake pad and vacuum booster in LDV eDeliver5 brakes system by Asiautos Auto Parts(MAXUS Aftermarket Parts Expert)

por Jason Chen en Jun 24, 2025
Introduction of front brake disc, front brake caliper, front brake pad and vacuum booster in LDV eDeliver5 brakes system by Asiautos Auto Parts(MAXUS Aftermarket Parts Expert)

Edited by Asiautos Auto Part

Brake System Components of LDV eDeliver5: Technical Overview

1. Front Brake Disc (Ventilated Disc Brake)

The front brake disc (or rotor) in the LDV eDeliver5 is a ventilated disc, designed to handle the vehicle’s load capacity and regenerative braking requirements.

Design & Material

  • Type: Ventilated disc brake (two-piece or single-piece, depending on variant).

  • Material: High-carbon cast iron or composite alloy, coated to resist corrosion.

  • Diameter: Typically 300–330 mm (varies by model year).

  • Thickness: 25–30 mm (ventilation gaps improve heat dissipation).

Function & Performance

  • Heat Dissipation: Ventilated discs feature internal vanes that circulate air, reducing brake fade during heavy use.

  • Compatibility: Works with regenerative braking (common in electric vehicles like the eDeliver5) to reduce wear.

  • Durability: Engineered for high thermal stability, minimizing warping under stress.

Maintenance

  • Inspection Criteria: Minimum thickness markings (e.g., 22 mm) indicate replacement thresholds.

  • Common Issues: Grooving, cracking, or excessive wear due to aggressive braking or pad contamination.

2. Front Brake Caliper (Floating or Fixed Type)

The front brake caliper houses the brake pads and applies hydraulic pressure to clamp the disc.

Design & Operation

  • Type: Floating (single-piston) or fixed (multi-piston) caliper, depending on trim level.

  • Piston Material: Aluminum or steel with anti-corrosion plating.

  • Hydraulic Pressure: Typically operates at 1,000–1,500 psi during braking.

Key Features

  • Piston Seal: Prevents fluid leaks and retracts pads slightly to avoid drag.

  • Slide Pins: Allow caliper movement in floating designs, ensuring even pad contact.

  • Integration: Compatible with ABS (Anti-lock Braking System) and ESC (Electronic Stability Control).

Maintenance

  • Lubrication: Slide pins require periodic greasing to prevent sticking.

  • Failure Signs: Uneven pad wear, fluid leaks, or caliper seizing.

3. Front Brake Pads (Organic/Semi-Metallic/Ceramic)

The front brake pads convert kinetic energy into heat via friction against the disc.

Composition & Types

  • Organic: Quiet but wear faster; contains rubber, glass, and Kevlar.

  • Semi-Metallic: 30–65% metal (steel, copper); better heat resistance but noisier.

  • Ceramic: Premium option; low dust, long lifespan, and stable performance.

Performance Metrics

  • Friction Coefficient: 0.35–0.45 (varies by compound).

  • Wear Indicators: Metal tabs squeal when pads are near end-of-life.

  • E-Vehicle Adaptation: Harder compounds may be used to compensate for reduced wear from regenerative braking.

Replacement Guidelines

  • Threshold: Replace at ≤3 mm remaining material.

  • Bedding-In: New pads require 200–300 km of moderate braking to optimize contact.

4. Vacuum Booster (Brake Servo)

The vacuum booster amplifies pedal force, reducing driver effort via engine (or electric pump-generated) vacuum.

Design & Operation

  • Type: Single or dual-diaphragm booster.

  • Vacuum Source: In EVs, an electric vacuum pump replaces the traditional engine manifold vacuum.

  • Pressure Ratio: 4:1 to 6:1 boost (e.g., 50 N pedal force → 300 N at master cylinder).

Key Components

  • Diaphragm: Rubber membrane separating vacuum/atmospheric chambers.

  • Check Valve: Maintains vacuum when the pump is off.

  • Master Cylinder Linkage: Converts boosted force into hydraulic pressure.

Failure Symptoms

  • Hard Pedal: Indicates vacuum loss or pump failure.

  • Hissing Noise: Suggests diaphragm leakage.

Integration in LDV eDeliver5’s Braking System

The eDeliver5’s brake system combines traditional friction brakes with regenerative braking:

  1. Regenerative Braking: Recovers energy during deceleration, reducing mechanical brake use.

  2. Hydraulic Backup: Friction components engage during hard stops or if regeneration is insufficient.

  3. ABS/ESC Coordination: Prevents wheel lockup while maintaining control.

Conclusion

The LDV eDeliver5’s front brake system prioritizes durability and efficiency, with ventilated discs, robust calipers, adaptive pads, and an electric-compatible vacuum booster. Regular inspection of these components ensures optimal performance, especially given the unique demands of electric delivery vehicles.

C00419153 C00429413 C00465720 C00480724 C00619874
C00415900 C00429403 C00465300-4100 C00517220 C00449623
C00420702 C00429404 C00465740 C00517221 C00449624
C00459355 C00505814 C00760002 C00623646 C00492705
C00545705 C00453830 C00770005 C00590995 C00492706
C00700631 C00453831 C00770006 C00590996 C00449627
C00415904 C00356370 C00573743 C00497808 C00542855
C00420702 C00356371 C00573744 C00497809 C00449628
C00420728 C00505796 C00573747 C00638835 C00495275
C00469867 C00613717 C00480723 C00619873 C00595003
C00595899 C00480239 C00480738 C00439108 C00439109
C00439116 C00439110 C00475081 C00475078 C00475079
C00439117 C00439107 C00493015 C00528041 C00536171

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