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December 12, 2013
Toyota Industries Develops New Toyota Industrial Engine
Meets the Latest Environmental Regulations and Enhances the Toyota Industrial Engine Lineup
Toyota 1ZS
Toyota 1ZS

Toyota Industries Corporation (TICO; Akira Onishi, President) has developed a new Toyota industrial engine, the Toyota 1ZS (diesel engine). This engine is a new addition to the lineup of clean and compact Toyota industrial engines that achieve the world's top level fuel efficiency, which includes the Toyota 1KD and 1FS engines announced in March of this year. These engines will be installed in lift trucks developed by TICO and marketed to manufacturers of construction machinery, agricultural equipment, power generators, and a wide range of other industrial equipment.

As with automobile engines, the exhaust emission regulations for industrial engines have become stricter in developed countries, while emerging emerging countriess such as China and India are considering the possibility of introducing similarly strict regulations. The latest exhaust emission regulations, in particular, include extremely strict indexes, such as reducing particulate matter (PM) emissions to 10% or less from the level allowed under the previous regulation, which means that the need to comply with stricter regulations and to improve fuel efficiency is increasing.

To respond to these market needs, TICO developed an inline, 3-cylinder, common-rail direct fuel injection turbo diesel engine with a newly designed basic frame, including the cylinder block. The TICO-developed variable-nozzle turbocharger, optimized to the supercharging characteristic for industrial engines, improves combustion efficiency and delivers high torque even at low engine speeds. This enables significant downsizing of displacement (50% lower than current models) as well as low emissions and high fuel efficiency (20% lower rated fuel consumption compared with current models) across all operating speeds.
Furthermore, TICO's significantly improved combustion efficiency has eliminated the need for the diesel particulate filter (DPF) typically installed in diesel engines that meet the latest regulations, enabling a highly compact system.

As an engine manufacturer, TICO is committed to continue developing clean, high fuel-efficiency engines that satisfy high-level customer needs and providing them to customers worldwide.

Main Features
  1. World's smallest* electronically controlled variable nozzle turbocharger (*Based on TICO's own survey)
    TICO further downsized its existing compact electronically controlled variable-nozzle turbocharger that is installed in the Toyota 1KD engine by optimizing the turbocharger to the 1ZS engine and developed a new, compact turbocharger specially designed to deliver high torque even at low speeds.
    The optimization of turbine wheel (which extracts energy from the exhaust gas), compressor wheel (which compresses fresh air) and variable nozzle aperture enables the supercharging across all operating speeds, greatly contributing to downsizing of the engine.

  2. DPF-less engine system
    The engine achieves dramatic improvement in combustion efficiency by combining the increased fresh air delivered by the newly developed turbocharger and atomized fuel spray provided by the direct-injection common-rail fuel injection system, with a newly designed combustion chamber. These features minimize the generation of PM and eliminate the need for a DPF, enabling the engine to meet the latest strict emission standards.
    The new design represents an environmentally- and customer-friendly engine system, preventing declines in fuel efficiency during the combustion and removal of the soot collected by a DPF and lowering maintenance costs by eliminating the need for periodic maintenance such as replacement of the DPF.

  3. Overbalancing
    In a 3-cylinder engine, the primary reciprocating couple remains from the pistons' up-and-down movements, generating shaking vibrations that try to move the two ends of the crankshaft alternately up and down. Installing a balance weight on the flywheel at the rear end of the crank and on the crank pulley at the front end converted this movement from an up-and-down vibration to a sideways vibration. The sideways vibration problem was then addressed by ways such as the optimized engine-mounting method.

  4. Meeting exhaust emission regulations in various countries
  5. Meets the EPA (US Environmental Protection Agency) Tier 4 Emission Standards
    Meets the EU Stage IIIB standards for nonroad engines
    Meets Japan's 2013 Exhaust Emission Regulations for special automobiles
    Engine Model Toyota 1ZS
    Cylinder Arrangement Inline 3-cylinder
    Total Displacement 1,795cc
    Bore×Stroke 86×103mm
    Valve Type 4-valve DOHC, Chain Drive
    Combustion System Direct Injection
    Supercharging System Electronically Controlled Variable Nozzle Turbocharger
    Fuel Injection System Common-rail Fuel Injection System
    After Treatment DOC (Diesel Oxidant Catalyst)
    Configuration 4-cycle, water-cooled
    Max. Output (reference value) 41 kW (2,200 rpm)
    Max. Torque (reference value) 200 Nm (1,600 rpm)
    Fuel Consumption at Rated Point
    (reference value)
    221 g/kWh
    (without fan, with DOC)
    Dry Weight 158kg

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