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Class 123/504 - Variable stroke


Subclass of Class 123 - Internal-combustion engines
Definition: Subject matter wherein the actual physical stroke length
No. of patents: 53
Last issue date: 03/20/2012


1    
NumberTitleIssue Date
8136508Selective displacement control of multi-plunger fuel pump
A pump for a combustion engine is disclosed. The pump may have at least one pumping member movable through a plurality of displacement strokes during a single engine cycle. The pump may also have a controller in communication with the pumping member. The controller ...
03/20/2012
8015964Selective displacement control of multi-plunger fuel pump
A pump for a combustion engine is disclosed. The pump may have at least one pumping member movable through a plurality of displacement strokes during a single engine cycle. The pump may also have a controller in communication with the pumping member. The controller ...
09/13/2011
7438050Fuel injection system for an internal combustion engine
An internal combustion engine having a fuel injector which functions as a positive displacement pump and dispenses an amount of fuel which is fixed for each and every operation of the injector, and a controller which controls the operation of the fuel injector. In r...
10/21/2008
7216630System and method to control spool stroke motion
An oil activated fuel injector which provides a pilot quantity of fuel prior to the main fuel injection event. A control system for a fuel injector includes a sensor for providing a signal to a control which is indicative of an opening motion of a spool. The control...
05/15/2007
7100578Method for driving fuel injection pump
The present invention achieves an increase in the amount of vapor that is expelled, stabilized fuel injection and improved starting characteristics in a fuel injection pump. In an electromagnetically driven fuel injection pump 20 which allows fuel to escape i...
09/05/2006
7059295Self-igniting internal combustion engine
A method is provided for operating an internal combustion piston engine, in which fuel is injected directly into a working chamber in the form of a pre-injection and main injection by means of an injection nozzle with a plurality of injection holes. The pre-injectio...
06/13/2006
6942469Solenoid cassette pump with servo controlled volume detection
Servo controlled solenoids provide actuation of a pump piston and valves, and electronic LC resonance measurements to determine liquid volume and gas bubble volume. Third order nonlinear servo control is split into nested control loops: a fast nonlinear first-order ...
09/13/2005
6772735Method for controlling an injection valve
A method for controlling an injector is described, where the trigger signal for the actuator is controlled as function of the amplitude and the duration. The actuator, using an hydraulic coupler, actuates a control valve which, at a low voltage, operates in a ballis...
08/10/2004
6705297Fuel pump for an internal combustion engine
A fuel pump for an internal combustion engine that transmits fuel with pressure by a lifting movement of a plunger that is caused to lift by a movement of a cam includes a lift amount changing mechanism. The lift amount changing mechanism includes a cam in which a h...
03/16/2004
6581573Compound electromagnetic valve, high pressure pump and apparatus for controlling high pressure pump
An electromagnetic control valve has a passage for conducting fluid. An electromagnetic actuator generates an electromagnetic force. A main valve body opens and closes the passage in accordance with the electromagnetic force generated by the electromagnet...
06/24/2003
6439191Fuel ram-injector and igniter improvements
An electromagnetic fuel ram-injector and improved igniter apparatus, comprising a fuel injector, and a fuel igniter in series with the injector, to ignite fuel passing through the injector....
08/27/2002
6406269Fuel pump
A fuel pump comprises a pumping plunger reciprocable within a plunger bore under the action of a cam drive arrangement. The cam drive arrangement comprises first and second surfaces defining therebetween a chamber, the volume of which can be controlled to...
06/18/2002
6296197Injection valve for a fuel system of a vehicle
An injection valve for a fuel injection system, for multistage control of the effective cross section of an injection opening. A spring/stop system with a first compression spring for a control valve for a control chamber, whose pressure determined the po...
10/02/2001
6116207Fuel air mixer and proportioner
Improved combination apparatus is described for creating a fuel rich mixture in a displacer volume, separate from the combustion chamber of a piston internal combustion engine. This mixture is subsequently delivered into the engine combustion chamber, to ...
09/12/2000
5979414Fuel metering pump for internal combustion engine
A fuel metering pump assembly for delivering fuel to a combustion chamber of an internal combustion engine has a crankcase, a throttle and at least one cylinder. A housing has a fuel inlet and a fuel outlet, and a metering arrangement is disposed in the h...
11/09/1999
5899188Air fuel vapor stratifier
An air fuel vapor stratifier apparatus is described, for use with piston internal combustion engines, to create stratified air fuel vapor mixtures within the engine combustion chamber. A fuel rich air fuel vapor mixture is created within a separate chambe...
05/04/1999
5735250Fuel pump for two-stroke internal combustion engine
A fuel pump for a two-stroke internal combustion engines, having a pump chamber with an inlet valve for connecting to a fuel delivery pump. An outlet valve for connecting to an injection nozzle of the engine, and an axially driven pump piston which define...
04/07/1998
5562428Fuel injection pump having an adjustable inlet poppet valve
A fuel injection pump driven by an electric coil, the pump including a poppet valve slidable within a fuel passage in an armature structure and relative thereto in response to movement of the armature structure relative to the pump housing and through a s...
10/08/1996
5551391Accumulator fuel injection system
A series of method and apparatus advances in the accumulator-type fuel injector art, applicable to both intensified and unintensified accumulator injectors, which cooperate to provide major improvements in internal combustion engine fuel economy, reductio...
09/03/1996
5266014Prestroke adjustment mechanism for fuel injection pump
A prestroke adjustment mechanism for a fuel injection pump comprises a U-shaped lever provided on the outer surface of the pump housing for rotating a timing control rod of the injection pump and a rotation limit pin provided on the same outer surface for...
11/30/1993
5197418Fuel injection pump for a two-stroke engine
The invention is directed to a fuel injection pump for a two-stroke engine which is especially for portable handheld tools such as motor-driven chain saws or the like. A pneumatic drive chamber is provided in the pump housing which is partitioned by a mem...
03/30/1993
5197417Fuel injection pump for a two-stroke engine in a work apparatus such as a motor-driven chain saw
The invention is directed to a fuel injection pump for a two-stroke engine mounted in a work apparatus such as a motor-driven chain saw. The injection pump includes a pneumatic drive chamber which is charged with the crankcase pressure of the two-stroke e...
03/30/1993
5152271Fuel injection apparatus
Fuel is pumped and supplied to an injector which injects the fuel in the form of mist. The quantity of fuel injected from the nozzle is regulated by quantity control means. The control means is comprised of a control valve, which is disposed on the inject...
10/06/1992
4928656Fuel-injection pump with variable cylinder capacity for diesel engine injection systems
A fuel-injection pump for diesel-engine injection system, comprising at least one cylinder-piston unit with an associated intake valve for the introduction of fuel delivered by an electrical supply pump, and a delivery duct. Electronic means are provided ...
05/29/1990
4842496Fuel injection pump for internal combustion engines including onset of supply control means
It is proposed that a drive tappet of a pump piston be provided with an integrated hydraulic supply onset adjusting device. This device includes an adjusting piston, which is guided in a work cylinder and is joined to the piston base of the pump piston, a...
06/27/1989
4760831Adjustment mechanism for changing discharge initiation and timing of an internal combustion engine
An adjustment mechanism for changing the timing of fluid flow to or from the combustion chamber of an internal combustion engine wherein an axially displaceable support body 15 displaces a plunger 10 tangentially relative to a camshaft 2 which reciprocate...
08/02/1988
4700668Method of injecting fuel for two-stroke engine and apparatus therefor
The invention is directed to a method of fuel injection for two-stroke engines, especially for hand-operated tools such as motor-driven saws and the like. The fuel-injection pump is charged with pressure present in the crankcase thereby causing fuel to be...
10/20/1987
4648556Pump/nozzle unit for fuel injection in internal combustion engines
A pump/nozzle unit having a piston injection pump and an injection nozzle which includes a pump piston that is driven via a drive tappet and is rotatable via a regulating sleeve. The regulating sleeve is inserted into a recess on the end face of the pump ...
03/10/1987
4611566Fuel injection pump for internal combustion engines
In a fuel injection pump for internal combustion engines, a leakage connection is provided for varying the fuel supply quantity and the supply onset in accordance with rpm. The leakage connection, in a pump piston executing the stroke movement, is effecti...
09/16/1986
4501245Fuel injection valve with variable lifting amount of the nozzle needle
A piston is rotatably received within a piston chamber formed in the nozzle holder for lifting together with the nozzle needle. An oil passage opens in the piston chamber in a manner closable by the lifting piston. After the closure of the oil passage, th...
02/26/1985
4494514Hydraulic adjusting device for controlling the beginning of injection of an injection pump
The invention relates to an hydraulic adjusting device for controlling the start of an injection pump for a self igniting internal combustion engine, wherein means are provided for changing the effective working stroke of the pumping shaft of the injectio...
01/22/1985
4493617Fuel injection pump with plunger stroke control
A rotary fuel injection pump having a rotary charge pump and a stroke control mechanism for variably limiting the outward stroke of a pair of diametrically opposed reciprocable pumping plungers of the charge pump for controlling the fuel charge measure de...
01/15/1985
4478196Fuel injection pump for internal combustion engines
A fuel injection pump for combustion engines with at least one pump piston which is actuated by a cam mounted on a mechanically operable camshaft is disclosed. The piston stroke is utilized only in part for delivery of the fuel, whereby the fuel feed volu...
10/23/1984
4407252Fuel injection system
A fuel injection system for internal combustion engines includes an improved direct injection pump having a reciprocating metering plunger and an improved injector for atomizing and injecting the fuel into the combustion chamber. Respective moving parts o...
10/04/1983
4380223Liquid fuel injection pumping apparatus
A liquid fuel injection pumping apparatus includes a plunger movable inwardly in a bore to deliver fuel, by the action of a roller and a cam. An adjustable stop ring is provided to limit the extent of outward movement by the plunger and hence the maximum ...
04/19/1983
4374511Fuel injection pump with distributor type fuel control
A fuel injection pump has a single plunger either electromagnetically or hydraulically actuated for flow of fuel into a fuel distribution chamber from which the fuel is distributed individually to each engine cylinder past a series of small solenoid contr...
02/22/1983
4343275Electromagnetically actuated pumps
A pump and pump system employs electromagnetic actuation during discrete, periodic time periods, imparting rapid strokes covering small distances. Each stroke is delineated by stop members at least one of which is of wedge-like form and is controllably sh...
08/10/1982
4338904Device for distributing fuel to a combustion engine
A device for distributing fuel to a combustion engine provided with two or more fuel pumps which are electromagnetically driven, the stroke of said fuel pumps being bounded by an adjustable stop bearing on a fixed stop support. In order to avoid variation...
07/13/1982
4327695Unit fuel injector assembly with feedback control
A unit fuel injector assembly consisting of a plunger type pump surrounded by a solenoid actuator, the voltage to which is controlled to vary the duration and magnitude of fuel pumped, thereby controlling the plunger stroke, a position feedback device pro...
05/04/1982
4325342Fuel injection pump control for internal combustion engines, especially diesel engines
A fuel injection pump control for internal combustion engines including a pump piston which pump piston is actuatable by a shaft and a cam follower roller adapted to contact the pertaining cam of the camshaft, whereby the fuel delivery volume can be adjus...
04/20/1982
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