Working Principle of the Hydraulic Booster

The forklift hydraulic brake booster amplifies the driver's braking force through a hydraulic system, achieving efficient braking control. Core Working Principle The forklift hydraulic brake booster adopts the principle of hydraulic amplification. When the driver depresses the brake pedal, the brake master cylinder piston pushes the hydraulic oil to generate initial pressure; at this time, the booster uses an external hydraulic source (such as a gear pump) or a vacuum negative pressure device to perform secondary pressurization on the hydraulic pressure, ultimately transmitting the enhanced hydraulic pressure to the brake wheel cylinders, pushing the brake shoes to achieve braking. System Composition and Working Process Power Input Stage The driver depresses the brake pedal, pushing the master cylinder piston through the push rod to compress the hydraulic oil. In advanced designs, the head of the master cylinder piston is provided with six small holes to ensure oil replenishment during continuous braking. Boosting and Pressurization Stage After the hydraulic oil enters the booster, pressurization is achieved through the following two methods: (1) Vacuum boost type: Utilizes the pressure difference generated by the vacuum degree of the engine intake manifold to push the diaphragm seat to assist in pressurization. (2) Hydraulic boost type: High-pressure oil is provided by an independent gear pump, and pressurization is achieved by controlling the pressure gradient of the oil pressure chamber through a spool valve. Power Output Stage The pressurized hydraulic oil is transmitted through pipelines to each wheel brake cylinder; the wheel cylinder piston is pushed by pressure to expand the brake shoes, generating friction braking force against the brake drum. Key Technical Features Dual-mode boosting mechanism: Some systems adopt a hybrid of vacuum and hydraulic boosting, automatically switching to pure hydraulic mode when the engine stops. Dynamic pressure adjustment: The spool valve structure can precisely control the opening of the oil pressure chamber, achieving linear response of braking force. Fail-safe design: When boosting fails, basic braking force can still be maintained through pure mechanical transmission. Changjian Machinery Co., Ltd. has a complete vehicle test ground, R&D center, marketing center, and forklift training base, and is committed to independent development and innovation, researching, producing, and selling various types of forklifts. The company follows the corporate spirit of "Excellent Quality, Always Leading," adheres to the quality philosophy of "Quality Creates Trust," provides high-quality products, and serves customers. You are welcome to call the hotline: +8615065751292, click on online customer service, Changjian off-road forklift is dedicated to serving you!