Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2001-04-04
2003-01-21
Kwon, John (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S472000, C123S299000
Reexamination Certificate
active
06508233
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is generally related to a supercharging system for an engine and, more particularly, to a supercharged system having two superchargers which each provide a share of the fuel based on engine speed and the load on the engine.
2. Description of the Prior Art
Many different types of supercharger systems are known to those skilled in the art. U.S. Pat. No. 5,937,833, which issued to Kapich on Aug. 17, 1999, describes a control system for a hydraulic supercharger system. The control system is specially adapted to control a supercharger system comprising a hydraulic pump, a supercharger having a hydraulic turbine drive and a compressor driven by the hydraulic turbine drive, a main hydraulic piping means providing a hydraulic circulation loop for hydraulic fluid to flow from the pump to drive the hydraulic turbine drive and back to the pump, and a supercharger bypass system comprising a control bypass valve and a piping means to permit a portion of the hydraulic fluid to bypass the supercharger turbine drive. The control system includes a bypass control valve arranged to close and partially and fully open the controlled bypass valve. The bypass control valve may be a hydraulic valve controlled by the pressure of the compressed air intake to the engine. The bypass control valve may also be a solenoid valve controlled by a pressure switch connected to sense hydraulic pressure and to apply a voltage to the solenoid valve to open or close the valve upon the hydraulic pressure reaching a predetermined value.
U.S. Pat. No. 5,937,832, which issued to Kapich on Aug. 17, 1999, is generally similar to U.S. Pat. No. 5,937,833 which is described above. The control system includes a solenoid arranged to close and partially or fully open the control bypass valve. The solenoid may be controlled by a pressure switch connected to sense hydraulic sense and to apply a voltage to the solenoid to open or close the valve upon the hydraulic pressure reaching a predetermined value. Since the hydraulic pressure increases with engine speed, it is a simple matter to adjust the control system to provide for the hydraulic fluid to drive the supercharger or bypass the supercharger at any predetermined ranges of engine speed. The bypass valve may also be controlled based on engine throttle position. In another preferred embodiment where the turbocharger system comprises an air flow check valve which opens when a turbocharger is providing air to the engine, the bypass valve is also subject to control based on the position on the check valve so that the hydraulic supercharger can be substantially bypassed when the turbocharger is able to provide sufficient air to the engine.
U.S. Pat. No. 5,127,386, which issued to Sowards on Jul. 7, 1992, describes an apparatus for controlling a supercharger. The apparatus includes a compressor having a rotor portion, an inlet, and a discharge. A motor portion of the apparatus has an intake manifold connected to the discharge. A throttle is displaceable between an open and closed position for controlling fluid flow between the discharge and the intake manifold. A bypass return line connects the rotor portion of the compressor to the inlet. A piston valve, moveable between an open location and a closed location, controls flow through the bypass return line. A control line, connecting the intake manifold to the piston rod controls the location of the piston valve. A control valve may be included to control fluid flow through the control line. A computer, which is affected by the operation of the motor, controls the position of the control valve.
U.S. Pat. No. 4,637,210, which issued to Yamamoto on Jan. 20, 1987, describes a supercharge pressure control apparatus of a supercharged engine. A bypass is provided to bypass a supercharger turbine arranged between the intake and exhaust passages. A waste gate valve is attached at one end of the bypass and is coupled to an actuator having a pressure chamber communicated with a connecting passage which is branched at a branch point into the first and second passages. A first port is formed in the intake passage downstream near a suction inlet of a compressor and a second port is formed in the intake passage downstream of the first port. In the stationary operating state, the connecting passage is communicated with the second passage by the charge-over valve, so that a high pressure from the second port acts on the pressure chamber and the supercharged pressure is maintained at a set level. In the acceleration operating state, the connecting passage is communicated with the first passage for a predetermined time, so that a low pressure from the first port acts on the pressure chamber. When the pressure at the first port operates the set level, the pressure at the second port exceeds the set level, so that a supercharged pressure over the set level is supplied into the engine. After a preset time, the connecting passage is communicated with the second passage and the pressure is held at the set level.
U.S. Pat. No. 4,530,339, which issued to Oguma et al on Jul. 23, 1985, describes a supercharger control apparatus for motor vehicles. The apparatus comprises a control device which has as input signals the demand signal for acceleration and an engine rotation speed signal. Based on predetermined ranges of demand signal for acceleration and engine rotational speed and on the input signals, the control device regulates, through an actuator and bypass valve or through an actuator and variable capacity compressor, the amount of supercharging. The supercharge control apparatus allows a non-supercharged state, a maximum supercharged state, or an intermediate supercharged state. In the intermediate supercharged state, the amount of supercharging is in incremental steps to prevent hunting.
U.S. Pat. No. 4,461,149, which issued to Suzuki on Jul. 24, 1984, describes a turbocharger control system for an internal combustion engine. The system comprises a supercharger for applying a supercharge pressure to the engine by driving a compressor with a turbine rotated by the energy of the exhaust gas, and an exhaust gas bypass valve for regulating the amount of the exhaust gas supplied to the turbine. A factor related to the engine combustion state, such as a knocking condition, is detected and a signal representing the condition is generated. At least one output pressure produced from the compressor is modified in accordance with the above-mentioned signal. The pressure thus modified is used for adjusting the opening of the exhaust gas bypass valve thereby to control the supercharge pressure.
U.S. Pat. No. 5,848,582, which issued to Ehlers et al on Dec. 15, 1998, discloses an internal combustion engine with barometric pressure related start of air compensation for a fuel injector. The control system for a fuel injector system for an internal combustion engine is provided with a method by which the magnitude of the start of air point for the injector system is modified according to the barometric pressure measured in a region surrounding the engine. This offset, or modification, of the start of air point adjusts the timing of the fuel injector system to suit different altitudes at which the engine may be operating.
U.S. Pat. No. 6,032,642, which issued to Trumbower et al on Mar. 7, 2000, describes a method for enhanced split injection in internal combustion engines. It describes a method for controlling fuel delivery in a fuel injection system capable of performing a split injection and includes the step of comparing at least one engine operating temperature to a temperature threshold and disabling split injection when the engine operating temperature exceeds the temperature threshold. Disabling split injection in this manner enhances cold temperature engine operating while providing a single injection at higher operating temperatures, as desired. Further, an engine and a computer readable storage medium having information stored thereon representing the instructions executable by an engine
Ehlers Jeffery C.
Haddad Robert E.
Suhre Blake R.
Brunswick Corporation
Kwon John
Lanyi William D.
LandOfFree
Method for controlling a fuel system of a multiple injection... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for controlling a fuel system of a multiple injection..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling a fuel system of a multiple injection... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3042669