Method and system for engine start

FIELD: engines and pumps.

SUBSTANCE: group of inventions relates to the field of engine start optimisation, which can be repeatedly stopped and started. Volume of fuel injection into intake channels is adjusted depending on position of engine stop relative to the dead points. Engine stop position may indicate the amount of injected fuel that enters the cylinder to complete the first combustion cycle after the engine is shutdown.

EFFECT: reduction of fuel consumption at engine start at acceptable toxicity of combustion products.

20 cl, 4 dwg

 



 

Same patents:

FIELD: power industry.

SUBSTANCE: invention can be used in pre-starting and auxiliary heat power plants of vehicles for simultaneous generation of heat and the electric power. Pre-starting heat power plant for vehicles contains an internal combustion engine (1), an electric generator (2), a waste heat exchanger (3) utilising the heat of exhaust gases, a mixing device (4) with an electric heater, a liquid pump (8) with the electric drive, a check valve (5) and hydraulic lines (9), (10), (11) with heat carrier. The plant is also contains the oil pump (15) with the electric drive, the recuperative heat exchanger (18) for heating of engine oil and the oil line which is built in the oil pan with the nozzles directed towards necks of the cranked shaft and towards the oil pump of the internal combustion engine, oil hydraulic lines. The recuperative heat exchanger (18) of heating of engine oil according to the series hydraulic circuit is connected by hydraulic lines of the heat carrier to the mixing device (4) with the electric heater. The oil pump (15) with the electric drive through oil hydraulic lines supplies engine oil to the recuperative heat exchanger (18) for heating of engine oil after which heated engine oil is supplied into the oil line which is built in the oil pan with the nozzles directed towards the necks of the cranked shaft and towards the oil pump of the internal combustion engine.

EFFECT: design simplification and reduction of dimensions.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engines. The invention proposes an electric heater of diesel oil or motor oil, which includes the following: outer casing (2), heating rods (1) and temperature control (3). Each of the heating rods (1) includes an electrode part, a heating part and a cover of the external coating, as well as it is connected to a mounting end of temperature control (3) by means of the electrode part and rigidly attached to outer casing (2) with one of its ends. Temperature control (3) is arranged inside outer casing (2); cavities of outer casing (2) are filled with a liquid sealant, and hole (5) is arranged on outer casing (2) for fixation of the heater in a set position.

EFFECT: heater has a low price; it is composed in the form of a structure; it is safe, reliable and serviceable.

6 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed heater comprises housing with coolant feed and discharge channels and cover tightly coupled with said housing, tubular electrical heater secured therein and motor-drive rotary pump Impeller is fitted on pump rotor shaft inside aforesaid housing Note here that said rotary pump is provided with jacket fitted in heater housing with secured by its one end in the latter in inlet channel zone Its opposite end is secured at housing cover in the area of rotor shaft with impeller exit so that said impeller is located inside aforesaid jacket Note here that said jacket in impeller zone has openings to communicate the jacket inside with heater housing inside Motor rotor is enclosed in cup-like case closed by cup cover on cover outer side and secured at cover inner side Note here that rotor shaft section with impeller fitted thereon extends through cup cover and heater housing cover inside the housing Tubular heater is composed of helical coil arranged around said jacket above its openings and secured at heater housing cover Coolant feed channel, pump jacket and rotor shaft with impeller are aligned.

EFFECT: higher efficiency, electric power saving.

11 cl, 5 dwg

FIELD: heating.

SUBSTANCE: invention claims autonomous device for diesel fuel heating in fuel tank 16, including heat exchanger 1 and heat carrier feed and control system 2. System 2 includes trolley 3 with gas heater 4 for heat carrier, pump 5, accumulator 6, control device 7 and gas cylinder 8 mounted on the trolley, heat exchanger is made in the form of rigid spiral tube mounted on handle 10 by a joint and connected to heater 4 with a flexible hose. Electric pump for heated diesel fuel stirring is installed inside spiral tube of the heat exchanger.

EFFECT: enhanced efficiency of diesel fuel heating in the whole volume of fuel tank.

3 dwg

FIELD: engines and pumps.

SUBSTANCE: measured ambient air and coolant temperatures are used to define air heater operating interval to correct it by fuel mix temperature in combustion chamber at compression stroke end while fuel in nozzle is heated to maximum possible value. After engine start, fuel heating intensity is decreased while nozzle operating heat conditions are kept up with the help of thermal pickup built in the nozzle, heater and control unit and maintained at said level during the entire cycle of post-starting interval with allowance for engine heat conditions and ambient air temperature. Inlet fuel and air controlled heating subject to engine and ambient air temperature allows maintenance of optimum temperature of combustion mix in the engine combustion chamber at whatever operating conditions.

EFFECT: decreased time and power consumption by diesel preparation for starting.

3 dwg

Fuel heater // 2535431

FIELD: machine building.

SUBSTANCE: electric fuel heater comprising body in form of the bolt with cavity in its rod, input and output holes, agitator, ceramic heating element, nickel-chromium spiral connected in series with the ceramic heating element, and casing. The internal cavity of the fuel heater body is made with spiral groove. The fuel agitator installed in the internal cavity of the body is in form of the bolt containing guide part and agitating element in form of the ellipse with spiral groove direct opposite to the spiral groove of the body.

EFFECT: higher efficiency of heat transfer.

1 dwg

Ice liquid heater // 2535291

FIELD: engines and pumps.

SUBSTANCE: heater comprises ICE, electrical generator, heat exchange offgas heat recovery unit, offgas main line, fluid lines, electrically drive fluid pump, check valve and tank with electric heater. In compliance with this invention incorporates extra recuperative heat exchanger for cooling of coolant with electrically driven blower and three-way valves with servo drive. Note here that fluid electrically driven pump is communicated via coolant fluid lines with ICE cooling system. Said system accommodates the tank with electric heater and heat exchanger-offgas heat recovery unit. Said heat exchanger is connected via fluid line with the first three-way valve with servo drive. The latter is arranged downstream of check valve in fluid line feeding coolant from ICE to carrier heater radiator lines and those of aforesaid recuperative heat exchanger. Second three-way salve with servo drive is arranged upstream of electrically driven fluid pump to communicate coolant feed and discharge lines with carrier ICE. Besides, ICE exhaust gases are fed via offgas main line to recuperative heat exchanger.

EFFECT: higher efficiency of pre-starting heating, higher thermal efficiency, decreased overall dimensions.

1 dwg

FIELD: transport.

SUBSTANCE: engine prestart heating is performed by natural gas feed into prestart heater combustion chamber to heat carrier engine coolant by natural gas combustion heat. Natural gas is fed from low-pressure main line via distribution gas line and gas hose into prestart heater combustion chamber. Prestart heater control system power supply and that of actuators related therewith is performed by connection to power supply located outside the carrier.

EFFECT: higher reliability and efficiency at long stops.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: system to maintain availability for start-up of an internal combustion engine (7) of a diesel locomotive comprises a standard system (4) for cooling of an internal combustion engine (7), a liquid heater (1), connected to the main manifold of the standard cooling system (4), a standard fuel system (18) of an internal combustion engine with a standard fuel tank (23) and a standard injecting fuel pump (19), an additional fuel tank (20), equipped with an overflow pipeline (21), a drain pipeline (22) with a tap and a pipeline connecting the additional fuel tank (20) with the liquid heater (1). There is an additional fuel pump (17), installed in the standard fuel system (18) in parallel to the standard injecting fuel pump (19), an additional oil pump (11), connected in parallel to the standard injecting oil pump (43), a device (15) for booster charge of an accumulator battery (16) of a diesel locomotive, maintaining it in the condition of availability for start-up of the internal combustion engine, and cooling coolant temperature sensors (13) for control of system operation, connected into the pipeline (46) with the lowest coolant temperature in the cooling system of the internal combustion engine. The additional fuel tank (20) of the system is connected into the drain pipeline of the standard fuel system (18) for provision of its reliable filling with diesel fuel. Additional circulating water pumps (30) are installed on inlet pipelines of standard liquid heaters (28) of air in driver's cabins (29) for provision of conditions in them for start-up of the internal combustion engine (7). Supply of the liquid heater (1), circulating electric motors (8), oil (11) and fuel pumps (17), a device (15) for booster charge of the diesel locomotive accumulator battery (16) and elements of the control system (47) is arranged via a separate cabinet (48) of electric equipment from the external source of energy.

EFFECT: increased reliability of system operation and increased time for engine standing idle in cold time of the year as continuously available for start-up.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed method consists in gas feed into cylinders and cylinder antechamber, spark ignition of gas in antechambers, and feed of gas combustion product from antechamber into combustion chambers of engine cylinders. At starting gas engine at crankshaft cranking by starter to stable idling rpm, gas is forced into engine cylinder antechamber and/or gas engine cylinders, gas volumetric combustion heat exceeding that of natural bas by some 1.5-2 times and higher. At starting the gas engine, fuel gas can be fed into some cylinders of multicylinder gas engine.

EFFECT: higher reliability of starting and accelerated starting.

2 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: internal combustion engine at stay after cold starting can change its combustion mode to homogeneous combustion mode or that based on fuel charge layer-by-layer distribution. Working range of combustion based on layer-by-layer fuel charge distribution at vehicle stay after cold starting is expanded relative to that of homogeneous combustion at stay after cold starting as vehicle inclination angle decreases.

EFFECT: expanded working range, negative pressure of sucked air for required brake characteristic, decreased HC content at stay after cold starting.

7 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to automotive industry. Proposed method of diesel (1) control consists in generating automatic oscillation of fuel feed device (7). On a sensor (6) signal at load decrease to magnitude smaller than 30% of rated value the fuel feed device position pickup (7) is used to feed signal from speed automatic controller (10) of control unit (13) and frequency generator via current sinusoidal oscillations of amplitude and frequency oscillator (12). Said oscillator (12) is timed by crankshaft turn angle transducer (5) with its angular position. Invention covers also the diesel control at low feed and minimum stable rpm.

EFFECT: lower minimum stable rpm at load and idling.

2 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: prior to switching on ignition gaseous fuel is injected. Then, also before switching on ignition, auxiliary fuel is additionally injected.

EFFECT: fuel savings, decreased harmful emissions.

9 cl

FIELD: engines and pumps.

SUBSTANCE: method of starting the ICE running on fuel contained in the tank comprises estimation of fuel amount, fuel volatility (PVR), fuel being injected into engine cylinder at starting subject to estimated fuel volatility (16). Estimated fuel volatility (15) is replaced by preset magnitude (20) at starting after replenishment.

EFFECT: easier starting at frost.

14 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed invention can be used for generation of four-stroke ICE sync signal NOCYL for ICE with uneven number of cylinders C1, C1, C3 with the help of electronic control system 7. Said NOCYL signal allows identification of preset moment at engine cylinder thermodynamic cycle. Sync signal is determined proceeding from TDC signal that identifies the position of every cylinder and signal Cg, Bn indentifying kinematics of crankshaft at fuel every ignition. Note here that both signals are generated on the basis of crankshaft position transducer 22. Proposed method comprises the steps whereat engine is operated for preset time interval with fuel ignition at engine every revolution, characteristic signal Cg, Bn is calculated with check magnitude at first second revolutions, sync signal NOCYL is re-initiated if sync signal is misphased.

EFFECT: decreased emission of contaminants.

4 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed method consists in utilisation of lubing oil heat and cooling water for heating, oil circulation, executing all preparatory jobs for starting and running standby diesel generator and starting diesel generator. Method covers automated and synchronous control over fuel and supercharge air feed at various operating conditions by means of three-pulse combination electronic fuel feed controllers and at various air pressures in the entire range of static loads and sharp variations of load. Regulation of lubing oil and cooling water temperatures is adapted to actual conditions, loads are distributed among diesel generators operated in parallel subject to control criterion and actual mean load thereto. Invention covers also forced synchronous outage of supercharging turbo compressor and diesel generator at normal and emergent conditions.

EFFECT: power savings, higher efficiency and reliability of starting and efficiency of diesel generator.

8 cl, 6 dwg, 1 tbl

FIELD: engines and pumps.

SUBSTANCE: this method in combination with cold start and/or warming-up at an idle operation of internal combustion engine (1) is used to start engine (1) by means of a cold start mode with preset values of engine operating parameters; quantity of accumulated one or several hydrocarbons in at least one component of exit gas neutralisation is estimated and the cold start mode of a motor is activated, if according to estimation quantity of peaks of HC-desorption stipulated by combustion gases of filler exceeds preset limit value.

EFFECT: method provides possibility of heating of components of exit gas neutralisation and allows defining exact time of engine warming-up with possibility to stop an active mode of the motor cold start, thus allowing to avoid fuel overflow or at least to restrict it.

20 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed method comprises the following jobs: (a) feeding first amount of fuel in combustion chamber in compression stroke by pre-injection to produce partially homogeneous premix in combustion chamber, (b) feeding main amount of fuel in combustion chamber by main injection and combustion of fuel-air mix by self-ignition. Beginning of pre-injection is selected to allow premix to ignite after short delay of ignition while beginning of the main injection is selected to allow main amount of fuel to be injected during combustion or directly after combustion of said premix. Pre-injection is executed at crankshaft turn through 22 to 100, in particular 25 to 30, before piston TDC. Main injection is executed at crankshaft turn through 20 before piston TDC to 20 after TDC. Main injection is divided into some partial injections. In starting ICE, first partial injection is executed at crankshaft turn through 2 before TDC to 2 after TDC, while second partial injection is executed at crankshaft turn through 2 to 5 after TDC.

EFFECT: fast starting, higher reliability.

10 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed system comprises storage battery, device to disconnected the latter from onboard circuit, electric starter, starting contactor terminals, capacitive power accumulator made up of capacitors interconnected in series or in parallel. Charge circuit of said power accumulator comprises current-limiting resistor and diode to shunt said resistor. System includes also additional contactor with closing contacts to connect storage battery with said capacitive power accumulator prior to starting locomotive diesel engine, contactor with closing contacts, transducers of accumulator charge current and voltage, controlled rectifier of accumulator charge, unit to generate and indicate charge voltage, and pulse-phase control unit. Said accumulator is connected to controlled rectifier output via contactor with closing contacts. Rectifier power input is connected to charge generator output. Voltage transducer is connected parallel with power accumulator. Outputs of current and voltage transducers are connected with voltage generation unit input and indication unit input. Output of voltage generation unit is connected to pulse-phase control unit with its output connected to control input of controlled rectifier. Capacitive power accumulator is charged automatically without interference of engine crew after starting of locomotive diesel. Charge indication unit allows visual control over charge current and voltage.

EFFECT: higher reliability and longer life, automated charging.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed electric starter comprises storage battery (1), starter (2), traction relay comprising winding (3) and make contact (4), starting switch (5), capacitive storages (6), (7) and (8), short-term make button (9), threshold elements (10), (11) and (12), decoder (13) and interrupter disks (14), (15), (16), (17), (18), (19) and (20) with control electrodes.

EFFECT: starter higher starting current.

1 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention makes it possible to develop method of control of runout of internal combustion engine to set piston in at least one cylinder into required position providing direct starting of engine at minimum possible expenditures. According to proposed method, piston in at least one of engine cylinders is purposefully set into required position corresponding to turning of crankshaft through angle whose value lies behind top dead center passed by piston. Valves of one or several cylinders of internal combustion engine after switching off the ignition are closed for one or several time intervals V1, V2. moments of beginning V2B and end V1E, V2E for each time interval V1, V2 when valves are closed, are set to provide stopping of crankshaft in required position of piston stop at runout.

EFFECT: provision of direct starting of engine.

6 cl, 3 dwg

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