ATV Brake Performance Standards
Published by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and the Standardization Administration of the People's Republic of China
Release Date: 2010-08-09
Effective Date: 2011-01-01
Knowledge Keywords: ATV brake standards, GB 24926, brake performance testing, ABS system, service brake, emergency brake, parking brake, brake test procedure
1. Core Terms (Simplified)
Service Brake: Main brake for deceleration during driving. Must stop the vehicle smoothly at any speed.
- Combined Brake System (CBS): Single-lever control activating brakes on all wheels (common in motorcycles).
- ABS: Prevents wheel lock-up on slippery surfaces. Yellow warning light illuminates if malfunctioning.
- Engine Disconnected: Transmission disengaged (neutral gear) during tests to eliminate engine interference.
- Wheel Lock: 100% tire slippage causing loss of control (ABS prevents this).
2. Mandatory Safety Requirements
①Design Rules:
- Asbestos-free brake pads only.
- Hydraulic systems must be split-circuit: Failure in one circuit shouldn't affect others.
- Fluid reservoir capacity = 1.5× max fluid demand, with easy level inspection.
②Control Mechanism:
- Hand lever force ≤200N, foot pedal ≤500N.
- Hands must remain on handlebars during operation (safety critical).
③Performance Limits:
- Brake Force Distribution: Front axle ≥60% of load, rear axle ≥55%.
- Balance: Front wheel force difference ≤20%, rear ≤24% (low load) or ≤8% (high load).
- Parking Brake: Must hold vehicle on 18% slopes (uphill/downhill) via mechanical lock.
3. Critical Test Methods
①Test Conditions:
- Dry, flat road (<1% slope), wind speed <5m/s.
- Tires inflated to OEM pressure, tread wear ≤20%.
②Type-0 Test (Cold Braking):
- Initial speed: 40km/h or 60km/h (based on max vehicle speed).
- Engine disconnected: Braking in neutral, measuring stopping distance & deceleration.
③Type-I Test (Fade Resistance):
- Repeated braking to overheat system, then performance retested (simulates long descents).
④Brake Force Bench Test:
- Roller/platform tester measures per-wheel force. Road test if results fail.
4. Safety Tips for Users
- ABS Warning Light: Normal at ignition-on; constant light while driving requires immediate repair.
- Maintenance: Regularly check pad thickness. Prevent fluid leaks (causes corrosion).
- Emergency: If service brake fails, apply emergency brake progressively (do not jerk!).
Industry Insight: GB 24926-2010 is mandatory for ATV exports to EU/US markets, covering design to validation.
✅ Original Content Declaration: Expert analysis of GB 24926-2010 sourced from China National Standards.
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