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4TN88G

Type Vertical cylinder, 4-cycle water-cooled gas engine
Combustion Spark Ignition/Pre-mixed/Stoichiometry
Maximum output 45 kW / 2600 rpm
Displacement 2.2 ltr
ATS Three way catalyst
Bore x Stroke 88 x 90 mm
Emission EPA Tier 2, CARB Tier 4, EU Stage V

More information

This LPG engine offers a quiet and clean option for those needing EPA Tier 2, CARB Tier 4 or EU Stage V compliance. It’s economical yet powerful due to the compact design of the unique Advanced Gas Combustion Technology.

These engines were unveiled for the first time at bauma 2019. An important step in fuel diversification of industrial engines. More information can already be found here.

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Specification

Model
4TN88G
Emission Compliance
EPA Tier 2 / CARB Tier 4 / EU Stage V
Engine Type
Vertical, 4-cycle water-cooled engine
Aspiration
Naturally aspirated
Combustion System
Spark Ignition/Pre-mixed/Stoichiometry
Fuel Type
LPG
ATS
Three Way Catalyst
Number of Cylinders
4
Bore x Strokemm88 x 90
DisplacementL2.2
Rated Output (WOT*/SAE J1995)kw/min-145/2600
Max. Torque (WOT*/SAE J1995)N-m / min-1175/1800
Overall Length x Width x Heightmm659 x 535 x 701
Weight (Dry)kg175 (w/o ATS) 

*WOT: Wide Open Throttle 


The line on the graph demonstrates the flat torque output across the rev range, perfectly tuned to industrial applications. So whether you are designing a machine for construction, mining or agriculture you can be sure of a consistent output whether it's geared towards drive or ancillaries like a bucket or forks.



Yanmar’s proprietary compact air-fuel mixing system results in a smaller engine (by approximately 9%) by eliminating the conventional gas engines with mixer system. Furthermore, our experience in installing industrial diesel engines to a variety of industrial machinery means that the engine layout is optimized to enable easy installation to forklifts, construction equipment, agricultural equipment and more.

By using the same application components and application software interfaces as those used with the machines and service tools on the market for use with Yanmar’s diesel engines, a high degree of compatibility has been secured between the diesel and gas engine installations.


With long experience in the development of gas engines, a combustion system optimized for LPG has been realized by implementing a high compression ratio and reducing intake pump loss. This has yielded fuel consumption reductions of 10%※8 compared to current mixer systems※9 resulting in longer operational hours for a same sized LPG tank, and reducing the lifecycle cost for the customer.

※8 Figures calculated by comparing the tested value of Yanmar’s mixer-type gas engines with the new gas engines. 
※9 Mixer system: The system uses air-gas mixer which is designed with the structure of venturi effect.