Development of Toyota 1ZZ-FE Engine

Adachi, Shoji; Horio, Kimihide; Nakamura, Yoshikatsu; Nakano, Kazuo; Tanke, Akihito

doi:10.4271/981087

Cited by 15 publications

(3 citation statements)

References 1 publication

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“…319-and 356type) alloys in engine blocks contributes to a considerable weight reduction (up to 45%) with the further benefit of improved thermal conductivity (three times better than cast iron). [262][263][264][265] However, this substitution has not been an easy task for the automotive industry. In 2002, about 50% of all vehicle engine blocks were produced using Al-Si alloys, but only y10% of them were Al-Si engine blocks without cast iron cylinder liners.…”

Section: Characteristics Of the Engine Blockmentioning

confidence: 99%

Application of cast Al–Si alloys in internal combustion engine components

Javidani

Larouche

2014

International Materials Reviews

311

112

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Excellent thermal conductivity and lower density make Al-Si alloys a suitable alternative for cast iron in the fabrication of engine components. The increase in the maximum operation temperature and pressure of engines necessitates improving the thermomechanical fatigue performance of Al-Si alloys. This paper has two major parts focussing on the use of Al-Si based alloys in cylinder heads and engine blocks. In the first part, the structural stress-strain and material property requirements of cylinder heads are discussed. In addition, the physical and mechanical properties of different competing materials used in the manufacture of engine components are reviewed. The physical metallurgy, solidification sequence and thermal conductivity of Al-Si based alloys are reviewed. Also discussed is the effect of microstructural features on thermomechanical fatigue lifetime. This part also includes an overview of the strengthening mechanisms of cast Al-Si alloys, by dispersed phases and heat treatment. Demands to improve fuel economy and reduce emissions necessitate modifications in the materials and design of engine blocks. Wear resistance and low friction coefficient are the major characteristics required for engine block materials. In the second part, the most promising alternative approaches to manufacturing liner-less Al-Si alloy cylinder blocks are elaborated.

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Section: Characteristics Of the Engine Blockmentioning

confidence: 99%

Application of cast Al–Si alloys in internal combustion engine components

Javidani

Larouche

2014

International Materials Reviews

311

112

View full text Add to dashboard Cite

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“…This is one of the reasons why aluminum and magnesium are used in engine components like crankcase, engine cover, and front cover [51]- [54]. Aluminum and grey cast iron alloys are also used for engine blocks and crankcase [55], [56]. Grey cast iron provides good damping capacity and temperature resistance.…”

Section: Structural Design and Materials To Improve Modal Performancementioning

confidence: 99%

Noise and Vibration in Switched Reluctance Motors: A Review on Structural Materials, Vibration Dampers, Acoustic Impedance, and Noise Masking Methods

2023

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Today, the majority of the commercial electrified vehicles use Interior Permanent Magnet Motors (IPMSMs) for propulsion. An IPMSM can deliver high starting torque and high efficiency in the low-and medium-speed operation, which makes it attractive for propulsion applications. However, IPMSMs generally utilize rare-earth permanent magnets and there are growing concerns about the price volatility and supply chain of these materials. Switched Reluctance Motors (SRMs) can potentially replace IPMSMs in various applications including propulsion. An SRM has a simple and low-cost construction, and it can provide reliable operation at high-speed and high-temperature conditions. Compared to IPMSMs, SRMs radiate considerably higher acoustic noise, which have historically hindered their widespread acceptance. Various approaches to mitigate acoustic noise and vibration at the source level have already been explored in the literarture by improving the electromagnetic design and current control. This paper explores multiple noise and vibration mitigation methods that can be applied at the transmission stage. First, the noise comparison between the Internal Combustion Engine (ICE) and SRMs is discussed, and then the methods used for ICEs are presented for their applicability to SRMs.

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“…St. Huege et al developed an in-line four-cylinder engine with a double balance shaft device, which greatly improved the NVH performance [17]. Shoji Adachi et al optimized the mass of reciprocating motion and valve train motion, greatly reducing the second-order inertial force [18]. Zhang carried out systematic research and software development on the balance schemes of in-line and V-type engines [19].…”

Section: Introductionmentioning

confidence: 99%

A Novel Coaxial Balance Mechanism for Reciprocating Piston Engines

Guan

Wang

et al. 2021

Applied Sciences

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Vibration is an important issue faced by reciprocating piston engines, and is caused by reciprocating inertia forces of the piston set. To reduce the vibration without changing the main structure and size of the original engine, we proposed a novel coaxial balance mechanism design based on a compact unit body. By introducing a second-order balance mass, this mechanism can significantly increase the efficiency of vibration reduction. The proposed mechanism can effectively balance the first-order and second-order inertia forces with the potential of balancing high-order inertia forces. To accurately determine the second-order balance mass, a closed-form method was developed. Simulation results with a single-cylinder piston DK32 engine demonstrate the effectiveness and advantage of the proposed mechanism. At a crankshaft speed of 2350 r/min, compared with the first-order balance device, the average root mean square velocity of the test points on the engine’s cylinder was reduced by 97.31%, and the support reaction force was reduced by 96.54%.

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Development of Toyota 1ZZ-FE Engine

Cited by 15 publications

References 1 publication

Application of cast Al–Si alloys in internal combustion engine components

Application of cast Al–Si alloys in internal combustion engine components

Noise and Vibration in Switched Reluctance Motors: A Review on Structural Materials, Vibration Dampers, Acoustic Impedance, and Noise Masking Methods

A Novel Coaxial Balance Mechanism for Reciprocating Piston Engines

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