Shop (63 kW) at 3500 rpm Isuzu 4JB1 Series diesel engine | Tonkee®

The 4JB1 engine is a 2.8-liter, four-cylinder, naturally aspirated diesel engine.

It features an overhead valve (OHV) design with indirect fuel injection. The engine block is made of cast iron, which provides excellent strength and durability. The 4JB1 engine has a bore of 95.4 mm and a stroke of 100 mm, resulting in a displacement of 2771 cc.

One of the notable characteristics of the 4JB1 engine is its reliability. It is known for its robust construction and long service life. The engine is designed to withstand heavy-duty applications and harsh operating conditions. The 4JB1 engine has a reputation for low maintenance requirements and high durability, making it a preferred choice for many users.

The 4JB1 engine produces a power output of around 85 horsepower (63 kW) at 3,500 rpm and a torque of approximately 185 Nm at 2,000 rpm. The engine's torque curve is optimized for low-end performance, providing good pulling power and responsiveness. This makes it suitable for applications that require high torque at low engine speeds, such as off-road vehicles and utility trucks.

In terms of fuel efficiency, the 4JB1 engine offers good mileage. Its indirect fuel injection system delivers fuel precisely to each cylinder, optimizing combustion efficiency. This results in better fuel economy and reduced emissions. The engine's fuel consumption varies depending on the application and load conditions but generally offers competitive fuel efficiency.

The 4JB1 engine incorporates several features to enhance its performance and reliability. It has a gear-driven timing system that ensures precise valve timing and reduces maintenance requirements. The engine also utilizes a timing chain, which eliminates the need for frequent belt replacements. Additionally, the 4JB1 engine has a robust cooling system with an efficient radiator to maintain optimal operating temperatures.

Noise and vibration reduction are important considerations in engine design, and the 4JB1 engine addresses these aspects.

It features a balanced design with counter-rotating balance shafts to minimize vibration. Isuzu has also incorporated noise reduction measures to ensure a quieter operation, resulting in a more comfortable driving experience.

The 4JB1 engine meets various emission regulations, including the stringent Euro II standards. It utilizes technologies such as an exhaust gas recirculation (EGR) system and a diesel oxidation catalyst (DOC) to reduce harmful emissions. These features make the engine environmentally friendly while maintaining its performance.

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