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HIAMS in the U.S.A.

Water Pump

Hitachi Automotive Systems Americas, Inc.'s water pumps will keep your engine running cool.Considered the ‘heart’ of the cooling system, the water pump is responsible for circulating engine coolant. It contains an impeller using centrifugal force to transfer coolant from the radiator to the engine block. A malfunctioning water pump can prevent proper coolant flow, compromise the entire cooling system, and cause the engine to overheat. Never ignore a faulty water pump, get a reliable replacement from Hitachi Automotive Systems Americas, Inc., which is a world class quality leader and a trusted original equipment manufacturer. This water pump is carefully constructed by the engineers at Hitachi Automotive Systems Americas, Inc. to keep the cooling system operating at peak performance throughout the life of your vehicle.

Water Pump

Aim

  • Realization of a Lightweight and Cost Reduced Water Pump

Benefit

  • Weight Reduction
  • Cost reduction

Outline & Features

  • Change specification from double row BRG to a single row BRG
  • Change materials of the Pulley, BRG Shaft, and Impeller to plastic
  • Single BRG Gen I
    Using general single row BRG
  • Single BRG Gen II　
    Integrating the Pulley and BRG* Shaft to be made by plastic

*BRG :Water Pump Bearing

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Electric Water Pump

Realization of a high efficiency electric water pump for hybrid engine cooling systems .

Benefit

  • Cost Reduction by reduced magnet size
  • Ability to control low speed flow

Outline & Features

  • Cost reduction
    Reduce magnet quantity with a highly efficient pump design

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Application

  • HEV engine cooling

On-Off Controlled Water Pump

Sing BRG design allows space for a spring clutch that is small size and light weight.

Aim

  • Realization of an On-Off controlled water pump with reduced cost and weight to stop coolant flow during cold engine starts

Benefit

  • Improve fuel consumption through quick engine warm-up
  • Fuel economy improvement
  • Weight Reduction : 40 %
  • Cost Reduction : 50 %

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Multi Waterway Control Valve

Improve fuel consumption 3% by controlling engine coolant flow to reduce friction and improve thermal efficiency .

Aim

  • Realization of an On-Off controlled water pump with reduced cost and weight to stop coolant flow during cold engine starts

Benefit

  • Expected Benefit: Fuel consumption 3% (NEDC mode)

Outline & Features

  • Small Package
    Hitachi Automotive Systems Americas, Inc.’s unique rotor design
    Optimum waterway design with Computational Fluid Dynamics (CFD) expertise
  • Low Cost and High reliability
    Carryover Electronic Throttle Body (ETB) part expertise

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Function & Benefit

  • Stop coolant flow to accelerate engine warming up
    ⇒ Friction reduction with quick warm-up and EGR
  • Deliver warm coolant to transmission during engine warming up
    ⇒ Friction reduction with quick warm-up
  • Control coolant respectively to head and block
    ⇒ Thermal efficiency improvement by compression ratio increase and advanced ignition timing
  • Control coolant flow to radiator
    ⇒ Thermostat replacement
  • Control coolant flow to cabin heater
    ⇒ Heater valve replacement

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