Apparatus for preventing engine stall

Patent · Tue Aug 25 04:00:00 EDT 1987

OSTI ID:6050123

Rowen, H E

An apparatus is described for preventing the stall of an engine drivingly associated with a power train including a fluid pressure source and a fluid pressure engaged, spring disengaged clutch disc assembly having an input member driven by the engine and an output member arranged along a central axis, comprising: control valve means for controllably directing fluid pressure to an actuator of the clutch disc assembly from the source and including a body having a bore arranged along the axis, a valve member reciprocally disposed in the bore, and means for continually urging the valve member in a first axial direction; and speed sensing means for sensing the rotational speed of the input member, urging the valve member in a direction opposite the first axial direction controllably throttling the fluid pressure to the actuator of the clutch disc assembly in response to a decrease in the rotational speed of the input member to a preselected angular velocity, slipping the clutch disc assembly, and limiting the torque load on the engine to a preselected maximum value.

• Assignee: Caterpillar Inc., Peoria, IL
• Patent Number(s): US 4688665
• OSTI ID: 6050123
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
ACTUATORS
ANGULAR VELOCITY
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FAILURES
FLOW REGULATORS
FLUIDS
HYDRAULIC FLUIDS
MACHINE PARTS
MEASURING INSTRUMENTS
MECHANICAL TRANSMISSIONS
MOTION
PRESSURE CONTROL
ROTATION
SPRINGS
TORQUE
VALVES
VEHICLES
VELOCIMETERS
VELOCITY
WORKING FLUIDS