Combine electro-hydraulic header height control systems have been widely accepted. Conventional on-off solenoid valves, however, perform less than ideally in automatic header height control systems due to their lack of metering. More acceptable automatic mode performance can be achieved with two stage valving, with a controlled response solenoid valve, or using a proportional valve.Electro-hydraulic proportional flow limiters provide smooth, repeatable flow control for combine hydraulic reel drives. Manual control options include a rheostat, a stepped resistance switch, or a pulse width modulated circuit. Automatic correlation of reel speed to ground speed is achieved with a closed loop or open loop electronic system.
Electro-Hydraulic Control of Combine Header Height and Reel Speed
Sae Technical Papers
1984 SAE International Off-Highway and Powerplant Congress and Exposition ; 1984
1984-09-01
Aufsatz (Konferenz)
Englisch
Electro-hydraulic control of combine header hight and reel speed
Kraftfahrwesen | 1984
|Closed Loop Electro-Hydraulic Control for Combine Header Floatation and Height
SAE Technical Papers | 1993
|Closed loop electro-hydraulic control for combine header floatation and height
Kraftfahrwesen | 1993
|Electro-Hydraulic Header Control for Combine Harvesters
SAE Technical Papers | 1994
|Electro-hydraulic header control for combine harvesters
Kraftfahrwesen | 1994
|