Honda Motor Co., Ltd.

Sumitomo Metal Mining Company, Ltd.

Kyushu University

Hideyuki Okamoto

Yoshiyuki Tanaka

Hirotomi Nemoto

Tetsuya Ishiguro

Tatsuhiro Yone

Masaki Imamura

Hiroichi Miyashita

Ryoichi Nakayama

Takashi Yamaguchi

Daishi Ochi

Iichi Nakamura

Yuji Aoki

Tsuyoshi Hirajima

Yoshihisa Takahashi

Shigeto Kuroiwa

Keiko Sasaki

Provided are: an engine-mounted controller capable of being suitably used in a vehicle that carries out an idle-stop operation while the vehicle is moving; and a vehicle. An engine-mounted controller of a vehicle determines whether or not an engine is in a completely stopped state when an idle-stop operation is canceled. If the controller determines that the engine is in a completely stopped state, a first control operation for suppressing the transmission of engine vibrations associated with engine idling is executed on the assumption that the engine is in a completely stopped state, and if the controller determines that the engine is not in a completely stopped state, the first control operation is prohibited when the engine restarts.

Engine mounted controller, and vehicle

A control apparatus for controlling a vehicle includes an actuator ECU. The actuator ECU acquires a crankshaft angle (stopped crankshaft angle) at a time that an engine stops operating. The actuator ECU identifies a crankshaft angle depending on an edge of a first TDC pulse of a TDC pulse signal immediately after the engine has been started or restarted. Then, using the identified crankshaft angle as a reference, the actuator ECU corrects the stopped crankshaft angle.

Control apparatus for vehicles

There is provided a method for separating an arsenic mineral from a copper-bearing material containing arsenic, such as a copper ore or a copper concentrate, to obtain a copper concentrate with low arsenic grade. The method for separating an arsenic mineral from a copper-bearing material by flotation includes adding a flotation agent containing a depressant, a frother, and a collector to a slurry composed of a copper-bearing material containing arsenic, and blowing air into the slurry to float a copper concentrate, wherein the depressant is sodium thiosulfate. The sodium thiosulfate is preferably added in an amount of 10 kg or more and 200 kg or less in terms of sodium thiosulfate pentahydrate per ton of copper-bearing material to be subjected to flotation. Further, the oxidation-reduction potential of the slurry to be subjected to flotation, as measured against a silver/silver chloride reference electrode, is preferably &#x2212;10 mV or more and 50 mV or less.

Method for separating arsenic mineral from copper-bearing material with high arsenic grade

In an active anti-vibration supporting device (), an ACM_ECU () for estimating an engine vibration state by using output data from a crank pulse sensor (Sa) and a TDC sensor (Sb) drives a driving unit () so as to extend and contract and thereby suppresses the transmission of vibration. The ACM_ECU () calculates the number of STGs (S) that is a quotient obtained when dividing the phase delay (P) of a target current value waveform by an average STG time ((T)/4) in a first cycle (C) of engine vibration and the remaining time (P') of the phase delay (P), wherein the target current value waveform is used for suppressing the transmission of the engine vibration calculated using the output data from the crank pulse sensor (Sa) and the TDC sensor (Sb). The timing at which the elapse of the STG time equivalent to the number of STGs (S) in a third cycle (C) of the engine vibration in the driving timing of the driving unit has been detected is set as a phase delay reference. Further, after the remaining time (P&#x2032;) has elapsed, the target current value waveform is output.

Active anti-vibration supporting device and anti-vibration control method for same

Disclosed herein is a method for separating an arsenic mineral from a copper-bearing material, including the steps of grinding a copper-bearing material containing arsenic, adding water to the copper-bearing material to prepare a slurry, and adding a flotation agent including a depressant, a frother, and a collector to the slurry and blowing air into the slurry for performing flotation to obtain a copper concentrate, wherein the depressant is a chelator. As the chelator, a polyethyleneamine or the like is used. Particularly, when triethylenetetramine is used as the chelator, the amount of triethylenetetramine to be added is preferably 1 to 10 equivalents relative to the amount of soluble copper generated by oxidation of the copper-bearing material, and the pH of the slurry is more preferably adjusted to 7 or more but 8 or less before the slurry is subjected to the flotation.

An ACM_ECU () estimates an engine vibration state in a first cycle (C) of engine vibration on the basis of signal outputs from a TDC sensor (Sb) and a crank pulse sensor (Sa) and calculates a target current value waveform having a cycle length (T). The ACM_ECU () then samples the target current value waveform at a constant sampling rate, thereby obtaining, for example, an aggregate of the data of target current values (Fr_ICMD) for a driving unit for driving an active control mount (MF) on the front side (Fr side). After that, the ACM_ECU () estimates the cycle length (T') of a third cycle (C) of the engine vibration on the basis of a predetermined number of crank pulse intervals at a timing when the data of the target current values (Fr_ICMD) are output to the driving unit (). The obtained aggregate of the data of target current values is corrected so as to correspond to the estimated cycle length (T&#x2032;) and fed to the driving unit ().

When a revolution speed of the engine (crankshaft) changes faster or slower, the vibration from the engine is propagated to an occupant in the vehicle, and the occupant may feel a sense of discomfort. For this reason, the present invention provides an active vibration isolating support apparatus and method for controlling the same to suppress the propagation of the vibration from the engine to the vehicle body so that the occupant may feel less sense of discomfort even if the revolution speed of the engine changes.

Active vibration isolating support apparatus and method for controlling the same

When driving an actuatorof an active vibration isolating support apparatus M to extend and contract on a predetermined cycle so as to suppress the transmission of vibrations of an engine, since a combined target current ICMDT is calculated by combining a primary target current which cancels a primary vibration of the engine with a secondary target current which cancels a secondary vibration of the engine and furthermore, the actuatoris driven with a target driving current ICMD in which a minimum value of the combined target current ICMDT is offset to 0, can the primary vibration and the secondary vibration of the engine be cancelled so as to enhance a vibration isolating function and the inclusion of a direct current component into the target driving current ICMD can be prevented so as to suppress a wasteful heat release of the actuatorto a minimum level.

Active vibration isolating support apparatus

By suppressing oxidation of sulfide minerals in sulfide ore due to bacteria or the like, this invention prevents the elution of heavy metals from the sulfide ore, and reduces the decrease in flotation performance when processing sulfide ore that is stored in a stockpile. Also, the invention makes it easier to process acidic wastewater from a stockpile or tailings dumpsite. In order to accomplish this, oxidation of sulfide minerals in sulfide ore is suppressed by adding an antioxidant, which contains plant polyphenol and whose main component is an organic acid that contains a carboxyl group, to the sulfide ore stored in a stockpile or tailings dumpsite.

Anti-oxidation method for sulfide minerals in sulfide ore

A copper concentrate obtained by flotation of a high grade copper ore containing chalcopyrite as a main mineral constituent is leached at a temperature of 100&#xb0; C. or higher, and under a pressure greater than atmospheric pressure yielding a copper leachate containing ferric ions of at least 5 g/L and sulfuric acid, and this copper leachate is used in heap leaching or vat leaching of a low grade copper ore, whereby a method of recovering copper economically from a material containing copper is provided.

Process of recovering copper from ore

The present invention concerns a method of separating variable ores containing copper, lead, zinc and the like as the refining material for non-ferrous metals and gangue minerals such as pyrite, quartz, feld spar and the like from dug out ores and, particularly, it relates to a flotation method. For obtaining non-ferrous metal valuable ores as concentrates from ores by a flotation method, flotation is conducted by using gaseous sulfurous acid or aqueous sulfurous acid as a depressant for controlling the floatability of pyrite. The flotation method comprises measuring the redox potential of an ore solution before and after the addition of gaseous sulfurous acid or aqueous sulfurous acid and determining an optimum addition amount by utilizing a proportional relationship present between the difference of the potential and the valuable quality enhancing rate. According to the method, it is possible to judge the effect of depressing pyrite, that is, the effect of sulfurous acid for enhancing the valuable quality without complicate analysis or test and, further, when the method is applied to automatic control, an utmost economical merit can be obtained by quality control of concentrates or saving of wasteful consumption of the reagent.

Growing community of inventors

Saitama, Japan

Hideyuki Okamoto