173results about "Internal combustion piston engines" patented technology

A method for inspecting a honeycomb structured body of the present invention is a method for inspecting a honeycomb structured body comprising a pillar-shaped honeycomb fired body having a multitude of cells placed in parallel with one another in the longitudinal direction with a cell wall therebetween, the method comprising: measuring the shape of the honeycomb structured body in the longitudinal direction through preparing a contact measurement apparatus including a reference surface, a rail disposed perpendicularly to the reference surface, and a measurement probe including a contacting probe configured to move along the rail; contacting one end face of the honeycomb structured body with the reference surface; and moving the measurement probe in a direction nearing the reference surface to contact the contacting probe with the other end face of the honeycomb structured body.

A variable displacement internal combustion engine having selectively disabled cylinders, the engine including two turbochargers each having a turbine and a compressor, an exhaust system connecting the turbines of both turbochargers to all the engine cylinders, and valving within the exhaust system for selectively directing exhaust gases to flow through one, the other or both turbocharger exhaust turbines, the valving being controlled in dependence upon the number of deactivated cylinders.

A flow-through muffler includes a plurality of heat conducting walls, baffles, or partitions that together define a plurality of passages arranged to form acoustic waveguides, attenuators, and/or cancellation chambers, the walls, baffles, or partitions increasing a surface area exposed to the exhaust gases to facilitate extraction of heat while attenuating or canceling the resulting sound pressure waves. The muffler may have a cooling arrangement mounted thereon, and thermoelectric generator elements or other heat-powered device, such as a reformer, connected across the heat differential between the cooling arrangement and an exterior surface of the muffler housing that is in thermal contact with the heat conducting walls, bafflers, or partitions. In addition, the muffler may be made tuneable by providing a device for varying a length of one of the passages relative to another passage, and by including a sound cancellation chamber at an intersection of the passages. In addition, the internal surfaces of the muffler may be coated with a catalyst to provide a combination muffler and catalytic converter.

An engine controller determines the cost of operating a combustion engine and the cost of operating an emissions after-treatment device. Accordingly, the engine controller adjusts parameters for operation of the engine and the after-treatment device to ensure cost-effective use of the engine and the after-treatment device while complying with exhaust emissions requirements. In particular, the engine controller receives the price of fuel consumed by the engine and the price of reductant used by the after-treatment device to determine the respective cost of operation. Specifically, the fuel is diesel fuel used in a diesel engine; the reductant is urea use in a urea-based Selective Catalytic Reduction (SCR) system; and the regulated exhaust emissions is nitrogen oxide (NOx) emissions. The engine operating parameters may include cooled exhaust gas recirculation airflow, fuel injection timing, fuel injection pressure, and air-to-fuel ratio. The SCR system operating parameters may include the volume of urea injected.

Methods and systems are provided for operating an engine with variable displacement engine (VDE) operation coupled to a twin scroll turbocharger. One method comprises directing exhaust from a first outer cylinder and a first inner cylinder of four cylinders to a first scroll of the twin scroll turbocharger, directing exhaust from a second outer cylinder and a second inner cylinder of the four cylinders to a second scroll of the twin scroll turbocharger, and during a first condition, firing all four cylinders with uneven firing.

The invention provides a 2-stroke internal combustion engine comprising two opposed cylinders, each cylinder housing two opposed pistons and having at least one exhaust port and at least one intake port, and a crankshaft having asymmetrically arranged journals and scotch-yoke mechanisms for driving the journals from the pistons. The pistons in each cylinder operate to open its exhaust port or ports before its intake port or ports and to close its exhaust port or ports before its intake port or ports.

A method for operating an engine having at least one cylinder that may be deactivated and a fuel system operating with an alcohol fuel blend, comprising of adjusting a range of operating parameters in which the at least one cylinder is deactivated, where said range is adjusted as the alcohol blend of the fuel varies.

The invention discloses a non-road diesel engine combustor DPF regeneration temperature control method. According to the method, control over the regeneration temperature of a non-road diesel engine combustor DPF is completed by combining feedforward control and PID feedback control. The method has the advantages that closed-loop control is stable and feedforward control is fast. The control precision of the regeneration temperature of a DPF catalytic converter is improved. Under various diesel engine working conditions, the error of the actual temperature of an inlet of the DPF catalytic converter and the DPF target regeneration temperature can be controlled within 25 DEG C. Accordingly, a DPF system can conduct reliable regeneration temperature management under various working conditions.

The invention discloses a tumor MRI weak supervised learning analysis modeling method, which comprises the following steps: S1, constructing a tumor MRI segmentation network based on a full convolutional neural network to realize tumor MRI preliminary segmentation; S2, taking the tumor MRI segmentation network as a generator, taking the classification model as a discriminator, and proposing a generative adversarial training algorithm of the tumor MRI segmentation network; and S3, taking unlabeled image data in the medical image as additional input condition information of the generator model and the discriminator model, guiding a data generation process, and enhancing the stability of the segmentation-generative adversarial network. The invention also discloses a model established by usingthe tumor MRI weak supervised learning analysis modeling method. According to the method, the tumor target region and the endangered organ can be more accurately and automatically segmented under thecondition of fewer training samples, and the method is applied to target region and endangered organ sketching of tumor radiotherapy.

The invention provides a novel air distribution system with variable lift, which is applied to the field of the internal-combustion engine of the motor vehicle. The novel air distribution system with variable lift comprises a hydraulic tappet (1), an air valve (2) and a rocking arm (3), and further comprises a transmission gear (7), an adjusting rod (9) and a stepping motor (10), wherein, a cam shaft (6) is arranged between the rocking arm (3) and the adjusting rod (9), the cam of the cam shaft is in contact with the adjusting rod (9), the adjusting rod (9) is connected with the transmission gear (7), and the transmission gear (7) is meshed with the stepping motor (10). By adopting the technical scheme, the invention has the advantages that the purpose that the air valve is changed along with the demands of the operating conditions is achieved, and the performance of the engine is optimized to the utmost extent; the structure is simple and compact, and the design is reasonable; and the modification of the engine applying the mechanism is small. Furthermore, the invention is suitable for upgrading for the production products.

The invention provides an automobile exhaust gas purifier and a method for purifying automobile exhaust gas. According to the automobile exhaust gas purifier, a disperser is used for dispersing the automobile exhaust gas into minute bubbles, and the minute bubbles are guided into sodium hydroxide solution of a filter vat, so that acid gas in the automobile exhaust gas is reacted with sodium hydroxide, and suspended particles in the exhaust gas are dissolved in the solution, therefore, harmful substances in the exhaust gas are greatly reduced, and the effect of exhaust gas purification is realized.

A method for operating an internal combustion engine, in whose exhaust gas system an exhaust gas treatment device is positioned, a reagent, which is possibly mixed with compressed air, being introduced into the exhaust gas system upstream from the exhaust gas treatment device, and a device for performing the method. The reagent is brought to a predefined reagent setpoint pressure using a reagent pump and subsequently metered using a reagent dosing valve. The reagent pressure existing upstream from the reagent dosing valve is detected. In the framework of a diagnosis, a time curve of the reagent setpoint pressure is predefined. The reagent pressure detected during the diagnosis is compared to at least one predefined threshold value. If the threshold value is exceeded, an error signal is provided. The corresponding diagnosis of a compressed air path may be provided alternatively or additionally to the diagnosis of the reagent path.

The present invention provides a method and a device for temperature management of an exhaust purification equipment. The invention relates to a method for temperature management in an exhaust channel of an internal combustion engine, wherein at least one thermoelectric generator is equipped in the exhaust channel or the exhaust purification equipment. The operation mode of the thermoelectric generator comprises: in temperature management of the exhaust purification equipment, when exhaust flow in the exhaust channel or for controlling the exhaust purification equipment, an achievable heating or cooling capacity of the thermoelectric generator and cooling capacity of additional components for cooling the thermoelectric generator are considered. The invention also relates to a device for temperature management of exhaust purification equipment in an exhaust channel of the internal combustion engine. Through totally including cooling or heating capability of the thermoelectric generator in the operation mode of the exhaust purification equipment, the efficiency of the exhaust purification equipment is improved, temperature management is improved and fuel consumption is reduced. The method and the device can be particularly used in an Otto engine or a diesel engine advantageously.

Operating a self-igniting internal combustion engine includes: specifying a setpoint combustion position and a setpoint combustion noise feature; operating at least one cylinder of internal combustion engine for at least one cycle while maintaining a first injector control variable and/or an air valve control variable and a second injector control variable and/or a second air valve control variable; ascertaining actual combustion position and actual combustion noise feature of the at least one cylinder; comparing the actual combustion position to the setpoint combustion position and, in case the actual combustion position deviates from the setpoint combustion position, determining anew the first injector control variable and/or the air valve control variable; and comparing the actual combustion noise feature to the setpoint combustion noise feature and, in case the actual combustion noise feature deviates from the setpoint combustion noise feature, determining anew the second injector control variable and/or the air valve control variable.

A mobile refrigeration unit includes a refrigeration system having a plurality of electric motor driven components and an on-board power supply system for generating electric current and supplying the electric current to the plurality of electric motor driven components. The power supply system includes a first generator for generating a first portion of electric power, a second generator for generating a first portion of electric power, a fuel fired engine driving the first generator, and an organic Rankine cycle system driving the second generator. An engine exhaust line connects the fuel-fired engine in exhaust gas flow communication with the organic Rankine system. The unit may also include a storage battery and a power management system.

The invention provides a diesel-alternative fuel hybrid combustion engine control method without an electric oil pump rack actuating mechanism, belonging to the field of engine control. According to the invention, an exhaust temperature sensor, a wide-range oxygen sensor, a mixedly burning ratio information display screen, an alternative fuel injection controller, a high pressure diesel pump rack displacement sensor and an alternative fuel injector are additionally arranged on an original diesel engine with a mechanical high pressure fuel pump; a high pressure diesel pump rack is mechanically connected with a vehicle accelerator pedal; and according to the position of the high pressure oil pump rack of the diesel engine, the alternative fuel injection controller determines the injection quantity of alternative fuel in combination with estimation on the excess air coefficient of an engine and the operation intention of the driver and sends a control command to drive an alternative fuel injection valve to inject corresponding alternative fuel to an engine intake pipe. The method has the beneficial effects of lowering the cost and overcoming the adverse factors caused by the adoption of an electric oil pump rack actuator and can be widely applied to the diesel-alternative fuel hybrid combustion engines.

An exhaust filter regeneration regime is described in which a filter (20) is regenerated by triggering an exothermic reaction in the filter (20) to burn off particulate load. In order to attain the appropriate regeneration temperatures fuel is injected in the exhaust stream and oxidises upon contact with a catalytic converter (18). A control regime comprises metering fuel injection dependent uponexhaust stream temperature to provide a flexible control regime independent of engine duty cycle.

The invention discloses a resource joint allocation method based on deep reinforcement learning in Internet of Vehicles. The method comprises the following steps: S1, constructing an Internet of Vehicles communication scene including vehicle-to-infrastructure communication and infrastructure-to-data center communication; S2, a base station collecting resource state information which can be allocated to vehicle nodes by communication cell infrastructure, and taking the resource state information as an input state of a deep reinforcement learning network DQN; S3, taking the connection state of the vehicle nodes and the infrastructure as an output action; S4, establishing an optimization model by taking maximization of the total throughput of vehicle node request tasks in a communication cell as a target; S5, designing a DQN reward function and a network structure, and training the DQN; and S6, according to the input state of the vehicle nodes, the DQN outputting an action with the maximum Q value as communication of the vehicle nodes, and calculating and caching a resource allocation strategy. According to the method, the joint allocation problem of communication, calculation and cache resources in the Internet of Vehicles is solved with lower complexity.

A urea solution apparatus for a vehicle may include a urea solution storage tank installed in a side of a lower part in a rear part of a car body, and a urea solution pipe configured to inject a urea solution into the urea solution storage tank, wherein the urea solution pipe is connected to the urea solution storage tank in such a way that a urea solution injection nozzle of the urea solution pipe is located in a space in which a fuel inlet hole is provided.