Definition

1. Noun:
   • A power transmission system that uses pressurized fluid: A hydraulic transmission is a mechanism that transfers power from one point to another using a liquid, typically oil, under pressure. It converts mechanical energy into hydraulic energy and then back into mechanical energy to perform work.
   • A type of automatic gear system: In vehicles and machinery, it often refers to a system that uses fluid coupling or torque converters to change gears and transmit power smoothly without manual clutch operation.

Usage Examples

• Noun:
  • The excavator uses a hydraulic transmission to power its tracks and digging arm.
  • Many modern tractors are equipped with a hydraulic transmission for easier operation.

Advanced Usage

• "Hydraulic transmission system": This full term emphasizes the complete assembly of components (pump, valves, fluid, motor) that work together.
  • The efficiency of the entire hydraulic transmission system depends on maintaining clean fluid.

Variants and Related Words

• Hydraulics (n): The broader science and technology of using liquids to transmit power and motion.
  • He studied engineering with a focus on hydraulics.
• Hydrostatic transmission (n): A specific type of hydraulic transmission where a hydraulic pump drives a hydraulic motor.
  • This lawnmower features a quiet and efficient hydrostatic transmission.

Synonyms

• Fluid drive: A general term for a transmission system using fluid.
• Hydraulic drive: A synonym often used in engineering contexts.

Related Phrases

• Hydraulic fluid: The specialized liquid used in a hydraulic transmission.
  • Always check the level of the hydraulic fluid.
• Transmission oil: Another term for the fluid used in such systems.

Noun

1. a transmission that depends on a hydraulic system