Methanol-fueled Diesel Engines Research Articles

Effect of Pilot Diesel Quantity and Fuel Delivery Advance Angle on the Performance and Emission Characteristics of a Methanol-Fueled Diesel Engine

It is effective for diesel engines to burn more methanol using a methanol/diesel dual-fuel system; moreover, the NOx and PM emissions can be reduced simultaneously without encountering the miscibility problem. In this work, diesel was delivered through the original high-pressure diesel injection system of the engine, while an electronically controlled low-pressure common rail system was employed to deliver methanol to the inlet port. The effect of pilot diesel quantity and fuel delivery advance angle on engine performance and emissions was experimentally investigated. The experimental test results showed that, under high-load operating conditions, it is better for the dual-fuel engine to run with a high rate of methanol, which can achieve a higher thermal efficiency, while under low-load operating conditions, high pilot diesel quantity is recommended. Under dual-fuel operation, HC and CO emissions are remarkably increased, while NOx and smoke emissions are obviously decreased. With the increase of the pil...

Combustion control in a methanol-fueled diesel engine — Part 5: Improvement of NOx emission characteristics applying EGR with supercharging under high load conditions Yoshio Sato, Akira Noda, Takashi Sakamoto (Traffic Safety and Nuisance Research Institute, Ministry of Transport)

Combustion control in a methanol-fueled diesel engine — Part 5: Improvement of NOx emission characteristics applying EGR with supercharging under high load conditions Yoshio Sato, Akira Noda, Takashi Sakamoto (Traffic Safety and Nuisance Research Institute, Ministry of Transport)

9436954 Combustion control n methanol-fueled diesel engines: Part 4 Improvement of combustion and exhaust emissions using EGR with intake charge heating: Yoshio Sato, Akita Noda, Takashi Sakamoto (Traffic Safety and Nuisance Research Institute, MOT), pp. 57–60, 11 figs., 3 refs

9436954 Combustion control n methanol-fueled diesel engines: Part 4 Improvement of combustion and exhaust emissions using EGR with intake charge heating: Yoshio Sato, Akita Noda, Takashi Sakamoto (Traffic Safety and Nuisance Research Institute, MOT), pp. 57–60, 11 figs., 3 refs

メタノールエンジンの潤滑特性

Methanol-fueled diesel engines have some technical problems. Lubrication trouble is one of them. Authors investigated effects of alcohol injection on lubrication condition between the piston rings and the cylinder liner on a large size test rig in order to clear problems before tests on a large size single cylinder test engine (bore: 250 mm, stroke: 250 mm), such as the adaptability of lubricating oil. As a result of this test which simulates the mechanism of a piston ring and a cylinder liner on a engine, alcohol injection on the sliding surface causes the improvement of lubricating performance. On the methanol engine, a result is shown that appropriate lubricating oil should be used in order to prevent the lubrication trouble. And 1 contamination and dilution of lubricating oil are not found, 2 abnormal wear of the piston rings and cylinder liner are not found, 3 the combustion chamber parts are clean and adhesion of carbon. on them is less than oil burning engines, and 4 lower base number lubricating oil should be used on the methanol engine than oil burning engines.

A Study on Compression-Ignition Methanol Engine with Converted Dimethyl Ether as an Ignition Improver.

A part of methanol fuel can be converted to dimethyl ether (DME), which has very good compression ignition characteristics, in a catalytic reactor using exhaust heat. By introducing DME into the intake manifold, a diesel engine can be operated by pure methanol without any major engine modification. This report presents experiments on combustion and exhaust emission characteristics of methanol fueled diesel engine with pure DME supplied from a bomb. It was found that the methanol engine with DME could be operated with sufficient stability. The appropriate DME quantity at which thermal efficiency and emissions were optimum were identified.