Apparatus for controlling transmission gear shift selection
In an automotive engine having an electrical power source and an automatic or semi-automatic transmission including a manually operated transmission gear shift lever having at least two forward drive positions, an apparatus is described which consists of: (a) a speed sensing means for sensing the rotation speed of the engine and generating an output signal when the engine reaches a preselected rotational speed; and (b) a gear shifting means for changing the shift positions of the gear shift lever from a first drive position to a second drive position automatically in response to the output signal from the speed sensing means, the gear shifting means including (i) a latch actuable between open and closed positions, (ii) a normally de-energized solenoid having a plunger connected to the latch and operable to move the latch to the open position when the solenoid is energized by the electrical power source, (iii) a relay means for allowing the energizing of the solenoid by the power source in response to the output signal from the speed sensing means, and (iv) an actuating means, including a spring biased linkage mechanism operably connected to the gear shift lever and the latch, for actuating the movement of the gear shift lever from the first drive position to the second drive position in response to movement of the latch from the closed to the open position, thereby causing gear shifting to occur when the engine reaches the preselected rotational speed.
- Assignee:
- NOV; NOV-85-018965; EDB-86-158450
- Patent Number(s):
- US 4602528
- OSTI ID:
- 5339227
- Resource Relation:
- Patent File Date: Filed date 22 Apr 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MECHANICAL TRANSMISSIONS
CONTROL SYSTEMS
VEHICLES
ENGINES
FASTENERS
GEARS
POSITIONING
RELAYS
ROTATION
SIGNALS
SOLENOIDS
SPEED REGULATORS
VELOCITY
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
MACHINE PARTS
MOTION
330602* - Vehicle Design Factors- Engine-Transmission Matching