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As the central hub of the AISIN Group's 150 consolidated companies, Aisin Seiki pursues business expansion chiefly through its mainstay Automotive Parts and Systems Business.
This business covers such diverse fields as drivetrain related, brake and chassis related, body related, engine related and information related products segments. Aisin Seiki capitalizes on its accumulated automobile related expertise to offer products in such diverse fields as life, energy and welfare. In this way, Aisin Seiki endeavors to offer attractive products and services with truly high quality and cost competitiveness based on “Quality First.”

Variable intake manifold with an integrated rotary valve
High output is achieved by switching intake ports according to driving conditions
- Cost and weight are reduced by applying resin intake manifolds and variable valves
- Engine output is improved by optimally controlling air flow to cylinder chambers by switching passages having different length
- To improve engine output, a rotary valve, which has low intake pressure loss, is used for a variable intake portion
*Joint development with MANN+HUMMEL GMBH
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Engine Front Module
Realization of the Lightweight and Fuel-efficient Engine Front Module by Integrating Parts and Functions
- The weight is reduced by die-casting large-sized products. It contributes to improvement of fuel consumption. Strength is also improved.
- Modularizing the accessory brackets reduces the number of engine parts in total
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Oil Pumps
High-efficiency Oil Pumps Developed from the Engine System Requirements
- Wide variety of oil pumps developed from the design and evaluation techniques, that can optimize the drive systems and installation type in each engine
- Development of the unique tooth profile of rotors, which allow the oil pump to be low friction and low noise
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Water Pumps
High-reliability Water Pump Developed from the Engine System Requirements
- The material of mechanical seals having a large role to play in preventing cooling water leakage changed to silicon carbide (SiC) from alumina. Thereby heating in the sliding portion and wear of the sliding member are prevented. Sealability is also improved.
- The triple lip seal is adopted as the bearing seal on the rear side. The bearing damage caused by which cooling water leaking from the mechanical seal infiltrates in the bearing, is prevented
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Electric Oil Pumps
Compact, Lightweight and Long-life Electric Oil Pump
- Downsizing by integration of control circuit, motor and pump enables various kinds of vehicles to mount
- Noise is reduced by optimizing motor control
- The product line up from small capacity (for assisting hydraulic pressure of VVT) to large capacity (for controlling hydraulic pressure of AT) is available
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Electric Water Pump
Compact, Lightweight and Long-life Electric Water Pump
- Downsizing by integration of control circuit, motor and pump enables various kinds of vehicles to mount
- Noise is reduced by optimizing motor control
- The product line up from small capacity (for cooling inverters) to large capacity (for cooling engines) is under development
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VVT System
Optimal Control of Intake/Exhaust Valves for Improving Fuel Efficiency, Exhaust, and Output Power
- Fuel consumption during idling has been improved. Harmful substances in exhaust have been decreased on middle load conditions. Output has been improved on high load conditions
- Highly efficient operation possible by optimal designing in response to any conditions with combination of our current oil pump
- Product series compatible with various engines are available
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Oil control valve
Ultra-compact, lightweight and low cost attributes are achieved through innovations in the magnetic component design
- Compactness in magnetic components is made possible using thin resin molding technologies
- Black scale of magnetic circuits is achieved using high-precision thickness-deviation press technologies
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Piston |
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Oil pan |
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Magnesium Alloy Cylinder Head Cover
Realization of the Lightweight Engine by Using a Magnesium Alloy |
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Magnesium type headcover |
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Fuel rails |
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Fan coupling |
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Resin type surge tank and Aluminium type intake manifold |
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Resin Intake Manifold |
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Intake Manifold
Providing Optimal Engine Design through the Experienced Aluminum and Resin Intake Manifold Design Technology
- Intake manifoid with hybrid structure of resin and aluminum
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Engine mount bracket |
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