Control system for engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorMasato Nishigaki
Life of this patent
Estimating the term…
Abstract
An electronically controlled engine management system for a multi-cylinder engine unnoticeably disables and enables various cylinder groups to preserve fuel economy. The engine management system enables the operator to enjoy high torque represented from a multi-cylinder engine and to maintain good fuel economy.
Claims15
An engine comprising an engine body having multiple cylinders, an engine management system at least controlling enablement of the cylinders, the engine management system including a controller configured to group the cylinders into at least a first group of cylinders and a second group of cylinders and to operate the first group of cylinders while disabling the second group of cylinders, the controller further configured to subsequently disable the first group of cylinders and operate the second group of cylinders, and an exhaust system having a plurality of exhaust passages, each exhaust passage communicating with one of the cylinders, the exhaust passages communicating with the first group of cylinders merging together, and the exhaust passages communicating with the second group of cylinders merging together, and at least one catalyst being disposed downstream of where the corresponding exhaust passages merge together, wherein the first group of cylinders comprises cylinders disposed in both banks of cylinders, and the second group of cylinders comprises cylinders disposed in both banks of cylinders.
An engine comprising a V-shape engine body having a pair of cylinder banks, the cylinders being divided into first and second groups of cylinders with each group of cylinders comprising cylinders from both cylinder banks, an engine management system configured to alternately disable the first and second groups of cylinders, and an exhaust system comprising a plurality of exhaust passages, each exhaust passage communicating with one of the cylinders, the exhaust passages that communicate with at least a portion of the first group of cylinders being routed to a first catalytic converter, and the exhaust passages that communicate with at least a portion of the second group of cylinders being routed to a second catalytic converter, the first catalytic converter and the second catalytic converter not communicating with each other.
Dependencies are inferred from the claim text.