32 results about "Fuel starvation" patented technology

In a solid polymer fuel cell series, various circumstances can result in the fuel cell being driven into voltage reversal. For instance, cell voltage reversal can occur if that cell receives an inadequate supply of fuel (for example, fuel starvation). In order to pass current during fuel starvation, reactions other than fuel oxidation may take place at the fuel cell anode, including water electrolysis and oxidation of anode components. The latter may result in significant degradation of the anode. Such fuel cells can be made more tolerant to cell reversal by promoting water electrolysis over anode component oxidation at the anode. This can be accomplished by incorporating a catalyst composition at the anode to promote the water electrolysis reaction, in addition to the typical anode electrocatalyst for promoting fuel oxidation.

A solid oxide fuel cell (SOFC) includes a cathode electrode, a solid oxide electrolyte, and an anode electrode having a first portion and a second portion, such that the first portion is located between the electrolyte and the second portion. The anode electrode comprises a cermet comprising a nickel containing phase and a ceramic phase. The first portion of the anode electrode contains a lower porosity and a lower ratio of the nickel containing phase to the ceramic phase than the second portion of the anode electrode.

The invention discloses a method and a device of oil return control of an air conditioner and the air conditioner. The method of the oil return control of the air conditioner comprises the following steps: detecting flow velocity v of refrigerating fluid in an oil return pipe, comparing the flow velocity v with preset flow velocity v <min>, wherein the preset flow velocity v <min> is the minimum flow velocity which is needed when the air conditioner returns oil; and when the flow velocity v is judged to be smaller than or equal to the flow velocity v <min>, the air conditioner is controlled to carry out an oil return treatment. By the adoption of the method and the device of the oil return control of the air conditioner and the air conditioner, the problem that when the refrigerating fluid operates in slow speed, a compressor is easy to damage caused by fuel starvation in the prior art can be solved, so that the effect that the service life of the compressor is prolonged is achieved.

The invention relates to Membrane Electrode Assemblies (“MEAs”) for solid-polymer-electrolyte proton-conducting membrane fuel cells (“PEM-FCs”) having better performance and improved durability, in particular when operated under severe electrochemical conditions such as fuel starvation and start-up/shut-down cycling. The MEAs are characterized in that at least one of its two electrode layers (EL1 and/or EL2) contains a first electrocatalyst (EC1) comprising an iridium oxide component in combination with at least one other inorganic oxide component and a second electrocatalyst (EC2/EC2′), which is free from iridium. Preferably, an iridium oxide/titania catalyst is employed as EC1. The MEAs reveal better performance, in particular when operated under severe operating conditions such as fuel starvation and start-up/shut-down cycling.

The invention discloses a fuel supplying reminding method and device, and belongs to the field of intelligent traffic. The fuel supplying reminding method comprises the steps that the amount of current vehicle residue fuel is obtained; it is detected whether a vehicle-mounted system is navigated to the designated destination or not; if it is detected that the vehicle-mounted system is not navigated to the designated destination, after driving is carried out on a vehicle by utilizing the amount of the residue fuel, the passing distance between the vehicle and a nearest fuel supplying station is detected, it is detected whether the vehicle can reach a buffer site or not, and the distance between the buffer site and the fuel supplying station is less than a pre-set distance threshold value; after the driving is carried out on the vehicle by utilizing the amount of the residue fuel, the passing distance between the vehicle and the nearest fuel supplying station is detected, the vehicle cannot reach the buffer site, and the vehicle is reminded to drive to the nearest fuel supplying station to be subjected to fuel supplying. The problems that the number of charging piles is low, and vehicle anchor dropping is easy to happen are solved. The effect that the vehicle anchoring phenomenon due to the insufficient fuel is effectively avoided is achieved.

The invention is directed to a barrier layer for corrosion protection in electrochemical devices, e.g. carbon based gas diffusion layers (GDLs) in electrochemical devices, comprising electrically conductive ceramic material and a non-ionomeric polymer binder. The electrically conductive ceramic material has an electrical conductivity of >0.1 S/cm, preferably >1 S/cm in air atmosphere (as detected by the powder method) and is selected from the group of precious metal and/or base metal containing oxides, carbides, nitrides, borides and mixtures and combinations thereof. Membrane-electrode assemblies (MEAs), catalyst-coated membranes (CCMs), gas diffusion electrodes (GDEs) and gas diffusion layers (GDLs) comprising the barrier layer of the invention show improved corrosion resistance, preferably against carbon corrosion; particularly in start-up/shut-down cycles and fuel starvation situations of PEM fuel cells.

In an apparatus for detecting fuel shortage of a general-purpose internal combustion engine connectable to an operating machine to be used as a prime mover of the machine, the engine being supplied with fuel stored in a tank and having an actuator adapted to open and close a throttle valve installed in an air intake pipe so as to achieve a desired engine speed set by an operator, comprising a fuel shortage condition detector adapted to detect whether the engine is in a fuel shortage condition, and an engine stopper adapted to stop the engine when the engine is detected to be in the fuel shortage condition. With this, it becomes possible to detect whether the engine having the electronic governor is in the fuel shortage condition, thereby preventing occurrence of trouble such as afterburning.

The direction of flow of purged fuel reactant gas (20) is sensed (38, 39, 44, 53, 54) to ensure it flows outwardly from a fuel cell stack (9) towards the ambient (21). If the purged fuel reactant. gas is not flowing outwardly, a signal (39) causes a controller (26) to open the circuit (35) thereby disconnecting the electrical load (33) from the fuel cell stack.

The invention discloses a manufacturing method of an oil bearing used at a temperature over 250 DEG C, comprising the following manufacturing steps: powder mixing, powder compacting, high temperature sintering, bearing coining, cleaning, drying and oil immersion. The minitype oil bearing manufactured by the method can completely satisfy the working requirement under the condition of over 250 DEG C, has stable revolving speed within 10,000-15,000rpm, has the relative speed variation no more than 30% and the relative current variation no more than 10% when working at 250 DEG C and 40 DEG C, has low noise and maintained on/off test length as long as over 150h, and prevents the problems of large noise, abraded inner hole and excessive revolving speed or locking due to fuel starvation of the bearing.

According to one embodiment, a method of driving a fuel cell device includes calculating a fuel shortage based on a difference between the fuel concentration detected by a concentration sensor element and a predetermined desired fuel concentration, and obtaining an efficiency of electricity generation of an electromotive section based on the temperature of the electromotive section detected by a temperature sensor element and the load current measured by a control section. The method includes calculating a fuel consumption by the electromotive section for electricity generation based on the output of the electromotive section and the obtained electricity generation efficiency, and replenishing by a supply section a mixing tank with an amount of fuel equivalent to the sum of the calculated fuel shortage and the calculated fuel consumption, thereby controlling the concentration of the fuel supplied to the electromotive section.

Methods are disclosed for detecting and lessening fuel starvation conditions in an operating fuel cell system. The fuel cell systems comprise a solid polymer electrolyte fuel cell with a regulating apparatus for regulating the pressure of fuel supplied to the anode inlet of the fuel cell, in which the outlet pressure from the regulating apparatus oscillates during operation. The methods involve monitoring an electrical output of the fuel cell during operation, determining the amplitude of oscillation in the electrical output, and then, if the determined amplitude of oscillation in the electrical output exceeds a predetermined amount thereby indicating a fuel starvation condition, taking a remedial action to lessen the fuel starvation condition.

A fuel cell includes an anode, a cathode, and an electrolyte membrane arranged between the anode and the cathode. A fuel deficiency countermeasure is implemented for the anode and a fuel deficiency countermeasure is implemented for the cathode. As a result, the fuel cell suppresses a decline in performance caused by a fuel deficiency.

The invention discloses an automobile fuel starvation warning circuit capable of reminding a driver of fuel capacity of an automobile in time. The circuit comprises a comparator, wherein the inverting input end of the comparator is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with a center head of a float-type potentiometer, and the center head of the float-type potentiometer is located on the fuel surface of an automobile fuel tank; a first resistor is connected to the non-inverting input end of the comparator, the output end of the comparator is connected with one end of a sixth resistor and one end of a fifth resistor, the other end of the fifth resistor is connected to the non-inverting input end of the comparator, and the other end of the sixth resistor is connected with the base electrode of a first triode; the emitting electrode of the first triode is connected with the positive electrode of a power supply through a thirteenth resistor, the collector electrode of the first triode is connected with the base electrode of a second triode through an eleventh resistor, the collector electrode of the second triode is connected with the negative electrode of a light emitting diode, the positive electrode of the light emitting diode is connected with one end of a fourteenth resistor, and the emitting electrode of the second triode is grounded.

The present invention provides a fuel electrode of a solid polymer electrolyte fuel cell for advancing a fuel cell reaction to oxidize the fuel introduced through a diffusion layer, comprising at least one reaction layer which is in contact with a solid polymer electrolyte membrane and advances the fuel cell reaction and at least one water decomposition layer which is in contact with the diffusion layer and electrolyzes the water in the fuel electrode. The layer taking charge of the fuel cell reaction is protected by providing the fuel electrode having a multilayer structure and providing the layer for preferentially performing the electrolysis of the water contained in the fuel or the like. This results in a fuel electrode in which the reduction of the electrode performance will not easily occur even when fuel shortage may be created.

A powering method of a fuel cell includes following steps. A fuel cartridge including a plurality of fuel units and an accumulator is provided. An under-load electric quantity of the accumulator is detected. If the under-load electric quantity is less than a threshold, power is supplied by the accumulator to a load. If the under-load electric quantity is greater than the threshold, a first fuel unit of the fuel units is selected and triggered to provide fuel which converted into the power. If the fuel of the first fuel unit is not enough to supply the power to the load, a second fuel unit of the fuel units is selected and triggered to provide the fuel. If the load is removed, the other fuel units which are not yet triggered are not triggered, and the accumulator is charged with the power converted from the fuel.

The invention relates to an oil return device for a vehicle air conditioner, in particular to a self-oil return device for the vehicle air conditioner. The self-oil return device comprises an exhaust pipe, a compressor, an air suction pipe, an oil loop, lubricating oil, an oil return pipe, an oil collecting bag outlet pipe, an oil collecting bag and an oil collecting bag inlet pipe. The self-oil return device is characterized in that: the compressor is successively connected to a condenser, an expansion valve, an evaporator and the oil loop in a closed loop manner, and the oil collecting bag is installed at the lowest position of the evaporator. The self-oil return device has the advantages that: air return of the compressor is utilized, the lubricating oil is brought back to the compressor, damage due to fuel starvation of the compressor can be prevented, control is simple, operation is reliable, installation is simple, and production and operation are convenient.

An object of the present invention is to recover the performance of an exhaust gas purification apparatus while suppressing slipping of fuel through the exhaust gas purification apparatus. When the performance of the exhaust gas purification apparatus is to be recovered at a time when the intake air quantity of the internal combustion engine is increasing (S101, S103), an upper limit value is set for the quantity of fuel added through a fuel addition valve provided in the exhaust passage (S104). If a target fuel supply quantity to be supplied to the exhaust gas purification apparatus is larger than the upper limit value (S105), a quantity of fuel quantity equal to the upper limit value is added through the fuel addition valve, and the shortfall of fuel supply is injected by sub fuel injection in the internal combustion engine (S110, S111, S112).

The invention discloses a ground anchor fixing device. One side of a fixing device body is provided with a first handle. The outer side of the middle of the first handle is sleeved with a first rubber cover. Another side of the fixing device body is provided with a handle groove which is internally provided with a first rotary shaft cover. A first rotary shaft is sleeved with the first rotary shaft cover. One end of the first rotary shaft is connected with a second handle. The outer side of the middle of the second handle is sleeved with a second rubber cover. A storage net is arranged in the middle of the bottom end of the fixing device body. In the operating process, the fixing device is convenient to hold and carry and has the storage capacity to a certain extent, and damage to the fixing device caused by fuel starvation can be conveniently prevented; by adoption of a half-and-half combined mode, an expanded head is inlaid in the fixing device and externally fixed with a nut, operation is easy and convenient, the fixing device is kept on the same straight line all the time in the whole force-transfer process, time and labor are saved, machining is convenient, and cost is not high.

The invention provides a fuel starvation protecting device for an air compressor. The device comprises a fuel tank body. First through holes are formed in two ends of the fuel tank body, the fuel tankbody communicates through the first through holes, a second through hole is formed in the top of the fuel tank body, the second through hole communicates to the fuel tank body, a supporting block isarranged on the top of the fuel tank, the supporting block is placed in the second through hole, a secondary loop is arranged in the second through hole, a floating ball is arranged in the fuel tank body, and the floating ball is connected to the secondary loop. The fuel starvation protecting device for the air compressor provided by the invention detects the fuel quantity of the air compressor according to the principle that the floating ball floats up when a fuel is available and the floating ball sinks when the fuel is not available, so that normal operation of the air compressor is guaranteed.