Showing papers on "Lean burn published in 1986"
TL;DR: In this article, the authors investigated the oxygen sensitivity of SrTiO3 doped with MgO in the exhaust gas of propane-oxygen combustion as a function of the mgO content.
Abstract: The oxygen sensitivity of SrTiO3 doped with MgO has been investigated in the exhaust gas of propane-oxygen combustion as a function of the MgO content. Among the specimens studied, SrTi0.6Mg0.4O3−δ. appeared to be a suitable material for a lean-burn oxygen sensor, because it exhibited a high oxygen sensing performance in the lean-burn region and an excellent stability in the rich-burn region.
34 citations
TL;DR: A methanol fueled, lean burn system has been developed to improve both specific fuel consumption and NOx emissions in the Toyota T-LCS as discussed by the authors, which is a 1.6L four-cylinder engine with increased compression ratio.
Abstract: A methanol fueled, lean burn system has been developed to improve both specific fuel consumption and NOx emissions. A 1.6L four-cylinder engine with increased compression ratio has been used to develop this system. Three major components of the Toyota Lean Combustion System (T-LCS) has been applied: (1) A helical port with a swirl control valve (2) A lean mixture sensor (3) Timed, multi-point fuel injection. A 2250 lb. Inertia Weight test vehicle has been fitted with this engine, and fuel system materials have been modified. This methanol, lean burn system has improved the fuel economy by about 12%, still satisfying the 1986 emission standards of the U.S.A. and Japan. Aldehyde emissions have also been evaluated.
5 citations
Patent•
04 Nov 1986
TL;DR: In this paper, a perovskite type oxide semiconductor having the ABO3 structure is used to obtain an oxygen sensor material capable of detecting and controlling the leaked air fuel ratio.
Abstract: PURPOSE:To obtain an oxygen sensor material capable of detecting and controlling the leaked air fuel ratio in the high air fuel ratio region by valency- controlling one part of the structural atoms of a provskite type oxide semiconductor with Al or Mg. CONSTITUTION:In a perovskite type oxide semiconductor having the ABO3 structure, SrAlxTi1-xO3 (x=0.01-0.2) wherein Ti of SrTiO3 is valency-controlled with Al is used. Also SrMgxTi1-xO3 (x=0.05-0.3) wherein Ti of SrTiO3 is valency-controlled with Mg is used. An oxide semiconductor having this composition is made to a lean burn sensor material. This oxygen sensor material is obtained by weighing a metallic compd. proportionate to its chemical composition on the basis of a stocihiometric composition, mixing and crushing it in a dry process and thereafter calcining, pressurizing, molding and sintering it.
2 citations
Patent•
18 Sep 1986
TL;DR: In this paper, the air-fuel ratio of a titled engine is reliably controlled to a desired value by using a lean burn sensor for feedback, and an amount of fuel injected is controlled so that the actual air fuel ratio is adjusted to adjust a given air- fuel ratio.
Abstract: PURPOSE:To enable the air-fuel ratio of a titled engine to be reliably controlled to a desired value, by a method wherein an actual air-fuel ratio is detected by a lean burn sensor for feedback, and an amount of fuel injected is controlled so that the actual air-fuel ratio is adjusted to a given air-fuel ratio CONSTITUTION:A two-dimensional fuel engine is provided with a gas fuel feed system 2, through which gas fuel 21 is by means of a regulator 22 and which is provided within a suction pipe 26 with a mixer 24, and a liquid fuel feed system 3 through which liquid fuel 35 is fed and which is provided within a suction pipe 36 with an injection valve 37 In this two-dimensional fuel engine, during operation of an engine, an actual air-fuel ratio is calculated from an output from a lean burn sensor 9 From outputs from a rotation detecting sensor 8 and an intake air pressure sensor 6, an injections starting time is calculated, and meanwhile, an injection time To is calculated and is corrected by means of an actual air-fuel ratio In case a change amount of an intake air pressure is low, a correction amount of an injection time is calculated according to a different between a correction injection time Ts and an injection time To, and the injection time To is controlled by means of the correction amount to produce an actual injection time T
2 citations
Patent•
18 Sep 1986
TL;DR: In this paper, a gas flow control valve was installed inside a gas fuel feeding passage to make the specified desired air-fuel ratio securable all the time, by installing an electrical actuator, while feeding back oxygen content in exhaust gas to be detected by a lean burn sensor and controlling the control valve.
Abstract: PURPOSE:To make the specified desired air-fuel ratio securable all the time, by installing a gas flow control valve to be operated by an electrical actuator, while feeding back oxygen content in exhaust gas to be detected by a lean burn sensor and controlling the control valve. CONSTITUTION:Inside a gas fuel feeding passage 1, there is provided with a gas flow control valve 2 whose opening is controlled by operation of a regulator 12 and a step motor 23. And, a nozzle 32 bringing an ejector effect into full play is installed in an air intake pipe 3, making almost constant air inhalable, and after this inhaled air is mixed with the said gas fuel, it is fed to an engine from a suction pipe 15 by way of a throttle valve 14 to be operated by a governor 13. And, an actual air-fuel ratio to be found according to the oxygen content detected by a lean burn sensor 7 installed in an exhaust route 5 is compared with the preset desired air-fuel ratio, operating such valve opening as making the difference lessen, and the step motor 23 is controlled according to the operated result.