97results about How to "Improve the state of combustion" patented technology

An engine ECU executes a program including the steps of: determining presence of abnormality in a low-pressure fuel system; ceasing an intake manifold injector when determination is made of abnormality in the low-pressure fuel system; increasing the target purge rate when the engine operation state attains an injection partaking state between an in-cylinder injector and an intake manifold injector; reducing the VVT overlap; and retarding the ignition timing.

An intake air amount control system for an internal combustion engine, which is capable of ensuring high robustness and improving controllability in intake air amount control, to thereby improve drivability and reduce exhaust emissions. A control system 1 of an internal combustion engine 3, which variably controls the amount of intake air drawn into cylinders #1 to #4 as desired via a variable intake valve actuation assembly 40 includes an ECU 2. The ECU 2 calculates a cylinder intake air amount Gcyl and a target intake air amount Gcyl_cmd (step 16), identifies, based on a controlled object model [equation (2)], a vector θs of all model parameters of the controlled object model with an identification algorithm [equations (8) to (13)], calculates a target auxiliary intake cam phase θmsi_cmd based on the vector θs with a sliding mode control algorithm [equations (15) to (21)] (step 80), and controls the variable intake valve actuation assembly 40 according to the target auxiliary intake cam phase θmsi_cmd.

A vehicle includes: an internal combustion engine; an exhaust gas recirculation device; and a controller that controls the internal combustion engine and the exhaust gas recirculation device. When acceleration of the vehicle is greater than or equal to zero and is less than or equal to a predetermined acceleration, an ignition performed with a predetermined energy and a predetermined number of times of performance that enable the internal combustion engine to efficiently operate for one event of explosion and combustion of the internal combustion engine. When the acceleration of the vehicle is greater than the predetermined acceleration, the ignition performed with an energy that is greater than the predetermined energy and/or a number of times of performance that is greater than the predetermined number of times of performance for one event of explosion and combustion of the internal combustion engine.

The invention discloses a combustion control system for a gas water heater or a wall-hanging stove and a control method thereof. The system comprises a flue gas channel composed of a combustor, a heat exchanger, a stepless variable speed fan and a smoke pipe which are sequentially connected, a control unit connected with the signal input end of the stepless variable speed fan and an air pressure sensor assembly for detecting pressure signals of the upstream of the stepless variable speed fan, and the signal output end of the air pressure sensor assembly is connected with the control unit. The control unit comprises a storage and a controller, the storage is used for storing the corresponding relation between the pressure signals of the upstream of the stepless variable speed fan and heating loads of the combustor, and the controller is used for controlling operation of the stepless variable speed fan according to the corresponding relation. By detecting the pressure signals of the upstream of the stepless variable speed fan, the rotating speed of the upstream of the stepless variable speed fan is further adjusted, and the combustion control system has high wind-resistant performance.

Provided is an engine exhaust energy recovery device wherein it is possible to reduce the fuel consumption rate of an engine to a predetermined level or lower in relation to the various engine loads and the number of revolutions of the engine, and to effectively use the exhaust gas which is emitted from the engine. The engine exhaust energy recovery device is provided with: a hybrid supercharger (3) which has a turbine section (3a) to which the exhaust gas emitted from an engine (2) is supplied, a compressor section (3b) which compresses and transfers a scavenging pressure to the engine (2), and a power generator/electric motor section (3d) which generates power when the turbine (3a) is driven; a bypass path (L2) which bypasses the exhaust gas that is supplied to the hybrid supercharger (3); and a control device which has a database for calculating the scavenging pressure, in which the fuel consumption rate of the engine (2) is at a predetermined level or lower, on the basis of the detection values obtained from the detection means including an engine load detection means, an engine revolution number detection means, and a scavenging pressure detection means. The control device controls an exhaust gas bypass control valve (V1) in order to control the scavenging pressure of the engine (2).

An electronic controller variably controls the center of an operating angle of an intake valve as follows: when an engine load factor is equal to or higher than a threshold in a low load operation, the electronic controller advances the center of the operating angle with a decrease in the engine load factor. When the engine load factor is lower than the threshold in the low load operation, the electronic controller retards the center of the operating angle with a decrease in the engine load factor.

A control system for an internal combustion engine in which fuel containing alcohol is used. In the control system, a maximum opening of a throttle valve of the engine is set, and a target opening of the throttle valve is set to a value which is equal to or less than the maximum opening. An opening of the throttle valve is controlled so as to coincide with the target opening. The maximum opening is according to a concentration parameter indicative of a concentration of alcohol in the fuel, a temperature parameter indicative of a temperature of the engine, and a number of ignitions performed after start of the engine.

A duel fuel diesel engine combining gas fuel, which comprises a first fuel supply system F1 for supplying a liquid fuel and a second fuel supply system F2 for supplying a gas fuel. The second fuel supply system F2 consists of a gas supply source 17, a pressure controller 19 for controlling the supply pressure of the gas and a gas injector 20 for injecting and supplying the gas fuel to an intake port 30. The gas injector 20 is arranged on the outer face of the engine, with its injection passage 21 having an exit 31 facing to the intake port 30. In a second intake stroke S2 after closing an exhaust valve 11, the gas fuel is injected and supplied to the intake port 30 by the gas injector 20. This makes it possible to achieve lower exhaust gas pollution by preventing the occurrence of unburnt gas or black smoke.

The invention relates to sludge-containing coal. China is a country with serious energy resource shortage. By calculating based on proved reserves and production capacity, the productive age limit of coal, oil and natural gas in China are 80 years, 15 years and 30 years. Recent years, the energy consumption is increased rapidly, therefore, the imbalance between supply and demand is increasingly outstanding. The composition of the sludge-containing coal comprises raw coal, sludge, coal slurry and sulfur-fixing smoke eliminating agent, the weight portion of the raw coal is 20 to 50, the weight portion of the sludge is 2 to 35, the weight portion of the coal slurry is 10 to 40, and the weight portion of the sulfur-fixing smoke eliminating agent is 3 to 8. The sludge-containing coal can be used as vicarious combustion material for coal.

A controller for a reformer includes supply quantity changing means for changing the supply quantity of at least either one of combustible gas and combustion oxidizing gas supplied to a combustion section, a combustion state change detecting means for detecting a change which is caused in the combustion state of the combustion section as a result that the change of the supply quantity is brought by the supply quantity changing means, based on a detection result from the combustion state detecting means, and combustion state checking means for checking the combustion state which arose at the combustion section before the change brought by the supply quantity changing means, based on a detection result from the combustion state change detecting means. Thus, the gone-out state of the combustion section can be reliably judged with the construction of a low cost, and the combustion state of the combustion section in the reformer of a fuel cell system can be adjusted to an optimum combustion state.

The invention relates to a hearth pressure control method of a vibrating grate boiler, which is an assistant adjusting method aiming at grate vibrating on the basis of an original hearth pressure control system, and can judge the hearth pressure change according to the influence of the grate vibrating on the flow of all the parts of an air and flue system, reduce grate air flow in due time and increase secondary air flow through advanced adjustment of all the executing mechanisms of the air and flue system, and provide guarantee for the safe combustion of the fuel while realizing the stable control of the hearth pressure. The method well solves the problems of raising, oscillating and the like of the hearth pressure along with the grate vibrating, improves the efficiency of the control system, improves the control effect, and is beneficial to the stabilization of the boiler burning state, and the improvement of the economical and safe operation level of the boiler.

The invention provides a nozzle for premixed combustion.A dilution zone is formed among the fluid outlet end of an inner-layer gas inflow structure, an outer-layer cylinder of an outer-layer gas inflow structure and the top ends of M layers of middle gas inflow structures, the influence of tempering on the nozzle and a combustor is lowered, and the tempering margin is increased.Oblique flow channels are formed between two adjacent wave rotational structures, between the corresponding wave rotational structure and an inner-layer cylinder and between the corresponding wave rotational structure and the outer-layer cylinder, combustion efficiency is improved, emissions of pollutants are reduced, flameout and flame pulsation are avoided, and the stability of combustion is improved.A drainage channel, an inner-side passageway and an outer-side passageway are formed by a supporting cylinder, the inner-layer cylinder and the outer-layer cylinder, and the stability, completeness and efficiency of combustion are further improved.

The invention provides an atomizing nozzle, a nozzle array and a combustor. Fuel is atomized through an atomizing wave cyclone and is fully mixed with air, the combustion state is improved, the combustion stability is improved, the stable operation range is enlarged, the combustion efficiency is improved, and the effect of reducing pollutant emission is achieved. Due to an oblique flow channel, a low-speed area is generated near a center shaft of an outlet of the nozzle, the flame combustion rate and the rate of a reaction fluid flow field are balanced, and the phenomena of flameout and flame pulsation are avoided. Due to the adoption of a supporting cylinder, the fuel and air flowing speed can be more stable, the flow field is more stable, and the stability, completeness and efficiency of combustion can be further improved. The atomizing nozzle is switched between a diffusion combustion mode and a premixed combustion mode according to combustion conditions so as to be suitable for various working conditions and various kinds of fuel, and the combustion performance is greatly improved.

The invention relates to a cooling-temperature-controllable-type engine intercooler assembly, and belongs to the technical field of supercharged engine intercoolers. The cooling-temperature-controllable-type engine intercooler assembly comprises an intercooler, a front gas channel, a rear gas channel and a temperature adjusting valve; the intercooler is provided with a gas inlet hole and a gas outlet hole; the front gas channel is connected between the gas inlet hole and the gas outlet hole and used for circulating gas not passing through the interior of a cooling device; the rear gas channelis connected between the gas inlet hole and the gas outlet hole and used for circulating gas passing through the interior of the cooling device; and the temperature adjusting valve adjusts the gas temperature in the gas outlet hole by adjusting the opening degree of a gas outlet of the front gas channel and/or the rear gas channel. The interior of the intercooler is arranged into a cooling and non-cooling double-gas-channel form, and the temperature adjusting valve is arranged at the common outlet of the front gas channel and the rear gas channel; the temperature adjusting valve can control the mixing ratio of the gas in the front gas channel to the gas in the rear gas channel to meet the control requirement of the gas inlet temperature of an engine, and the gas inlet temperature of the engine is automatically controlled; and the temperature adjusting valve can adjust the temperature after intercool to enable gas inlet temperatures of all operating points of the engine to be controlledin the optimal state.