Prime-mover dynamo plants – Electric control – Engine control
Patent
1996-12-11
1998-09-15
Dougherty, Thomas M.
Prime-mover dynamo plants
Electric control
Engine control
322 29, 322 28, 123339, H02P 904
Patent
active
058083677
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
In a control system for a vehicle generator for generating power driven to rotate by an internal combustion engine mounted on a vehicle, the present invention provides a control system for the vehicle generator and a control method therefor having no variation in the rotation of the internal combustion engine due to an electrical load during an engine idling period or having no drop in the speed of rotation of the internal combustion engine at the time of a sudden change in driving conditions such as a change from a racing to an idling status or a change from a deceleration to an idling status, by achieving an optimum power generation which matches a driving status of the internal combustion engine as well as by supplying an optimum quantity of auxiliary air.
BACKGROUND ART
The control of a vehicle AC generator for performing a power generation operation driven to rotate by an internal combustion engine mounted on a vehicle has so far been achieved generally by a control unit called an IC regulator. The IC regulator controls a voltage of a vehicle battery charged by an output of the generator to a predetermined level by detecting the voltage of the vehicle battery.
The Patent Gazette of the Japanese Patent Post-exam Publication No. 1-39306 discloses a unit for controlling a volume of a current flowing through an excitation coil by ON/OFF controlling a switch incorporated in the generator by sending a control signal of a micro-computer through a signal line.
Further, according to the Japanese Patent Laid-open Publication No. JP-A-59-103935, an adjustment of the rotation number of the internal combustion engine is carried out by co-operation of a generator control unit for controlling a generation volume of a generator according to the rotation number and an ISC valve control unit. As a method for detecting an electrical load, ON/OFF of a switch of a specific electrical load has been detected through a wiring.
Among the above-described control units of a generator mounted on a vehicle according to the prior-art technique, the control unit using an IC regulator has a power generation function by itself and, therefore, has a merit of high generality. On the other hand, this control unit lowers the response of the power generation volume against variations in the electrical load. Accordingly, this control unit has a problem in that this has a low degree of freedom since the responsiveness of a load response control and a control range of variable voltage control have to be dependent on the hardware when carrying out a load response control for slowing the engine load variations and a variable voltage control for generating power based on an output voltage indication signal generated from the internal combustion engine control unit. There is also a problem of high costs since the generator also has a control unit. In the example of the Japanese Patent Post-exam Publication No. 1-39306, the relation between the control of the generator and the control of the internal combustion engine is unclear. Further, in the case of the Japanese Patent laid-open Publication No. JP-A-59-103935, it is possible to control the rotation number of the engine by an overall control of the generation operation by taking in an operational tire electrical load status. However, since a target voltage value is simply changed over by a control unit and an actual load is not taken into account as a method for controlling the power generation operation of the generator, the improvement in power performance of the internal combustion engine and the effect of reduction in fuel consumption are not sufficient. Further, it is not possible to obtain sufficient effect against rotation variations at time of variations in electrical load. Since the generator also has a control unit, there is a problem of a high cost. Further, since no consideration is given to the ON/OFF status of the head lamps, there is a problem that variations in the illuminance of the head lamps occur due to voltage variations arising from the load response c
REFERENCES:
patent: 4919096 (1990-04-01), Manaka et al.
patent: 4951627 (1990-08-01), Watanabe et al.
patent: 5256959 (1993-10-01), Nagano et al.
patent: 5263447 (1993-11-01), Fujimoto
patent: 5545928 (1996-08-01), Kotani
patent: 5592918 (1997-01-01), Suzuki et al.
patent: 5623903 (1997-04-01), Ueda
patent: 5685285 (1997-11-01), Ohtani et al.
patent: 5703410 (1997-12-01), Maekawa
Japanese Search Report, Jul. 9, 1996.
Akagi Yoshihiko
Fujishita Masakatsu
Dougherty Thomas M.
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
Ponomarenko Nicholas
LandOfFree
Control system for vehicle generator and control method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control system for vehicle generator and control method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system for vehicle generator and control method therefor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-91529