Automatic engine ignition shut-off device

Patent · Tue Aug 15 04:00:00 EDT 1989

OSTI ID:5310575

Pettinelli, A J

This patent describes an apparatus for connecting the return spring of a throttle linkage to a movable accelerator for immediately shutting down the engine of a motor vehicle when the throttle fails in an open position. It includes: a switch housing attached to an accelerator means such that the switch housing will move with the accelerator means through a range of accelerator positions; a normally closed switch for shutting down the engine, the switch being mounted in the housing; a piston slidably mounted within the housing for cycling the switch. The piston being movable between a first normal position and a second switch opening position wherein the engine is shut down; a member connecting the piston to the return spring in the throttle linkage whereby the return spring holds the piston in the first normal position as the accelerator is moved through its range of positions, and a cut-off spring having less spring strength than the return spring so that the cut-off spring will move the piston into the second switch opening position when the return spring force is removed from the piston.

• Assignee: NOV; NOV-89-086062; EDB-90-009020
• Patent Number(s): US 4856471
• Application Number: PPN: US 7126552A
• OSTI ID: 5310575
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AUTOMATION
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
OPERATION
SPRINGS