Engine idling speed sensing system

Patent · Tue Sep 20 04:00:00 EDT 1988

OSTI ID:6888759

Smyth, R R

This patent describes engine idling speed sensing system for a vehicular internal combustion engine having a throttle member for controlling engine speed, a transmission drivingly coupled to a drive train and having a selectable neutral disengaged condition and engaged change gear conditions for causing the drive train to move the vehicle, and a clutch member selectively operable to engage the engine with and to disengage the engine from the transmission. The system consists of: (a) an engine speed sensor member operative to provide a signal indicative of engine speed, (b) a throttle position sensor member operative to provide a signal indicative of whether the throttle member is in an advanced or idle condition, (c) a clutch condition sensor member operative to provide a signal indicative of whether the engine is in the engaged or disengaged condition with the transmission, (d) a transmission condition sensor member operative to provide a signal indicative of whether the transmission is in change gear engaged or neutral condition, and (e) circuit means including a memory portion for storing at least a stored clutch disengaged engine idling speed value and operative to proves the engine speed, throttle condition, clutch condition and transmission condition signals and to replace the stored speed value with engine speed value sensed by the engine speed sensor as a clutch disengaged engine idling speed value whenever the throttle signal indicates that the throttle is in the idle condition and the clutch signal indicates that the clutch member is in the disengaged condition and the transmission signal indicated that the transmission is in the neutral condition.

• Assignee: Eaton Corp., Cleveland, OH
• Patent Number(s): US 4774832
• OSTI ID: 6888759
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
ENGINES
GEARS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
MEASURING INSTRUMENTS
MECHANICAL TRANSMISSIONS
METERING
METERS
OPERATION
VELOCITY