Engine
AssigneeYanmar Co., Ltd.
InventorShinya Fukuyoshi
Life of this patent
Estimating the term…
Abstract
Provided is an engine with a starter valve arranged in a compact space and with a cylinder head having a cooling water passage and a starter valve feeding compressed air to a combustion chamber. The starter valve is arranged parallel in the axial direction to a cylinder while fitted into a sleeve, and a portion of the cooling water passage is formed by the outer surface of the sleeve fitted into a starter valve insertion hole formed in the cylinder head. A starting air passage orthogonal to the axial direction of the starter valve insertion hole is formed in the cylinder head, and a portion of the wall surface of the starting air passage is formed by the end surface on one side of the sleeve.
Claims20
An engine comprising a cylinder head in which a starter valve with which compressed air is fed to a combustion chamber is provided and a cooling water passage is formed,
- wherein the starter valve is arranged in parallel with an axial direction of a cylinder while being fit in a sleeve,
- wherein an outer circumferential surface of the sleeve forms a part of a wall surface of the cooling water passage,
- wherein the sleeve is fit in a starter valve insertion hole formed in the cylinder head,
- wherein an air passage is formed in the cylinder head to be orthogonal to an axial direction of the starter valve insertion hole,
- wherein the air passage communicates with a distal end surface of the sleeve in an inserted direction, and
- wherein a step portion that engages with a step portion of the starter valve insertion hole is formed on an outer circumference of the sleeve.
An engine comprising:
- a combustion chamber;
- a cylinder head defining a starter valve insertion hole, a control fluid passage, a starting fluid passage and a coolant passage;
- a sleeve positioned in the starter valve insertion hole;
- and
- a starter valve positioned within the sleeve in the starter valve insertion hole and configured to provide starting fluid, received from the starting fluid passage, to the combustion chamber, wherein:
- the starter valve is arranged in parallel with an axial direction of a cylinder of the engine,
- an outer circumferential surface of the sleeve forms a part of a wall surface which defines the coolant passage,
- the starting fluid passage is orthogonal to the axial direction of the cylinder and to the starter valve insertion hole, and
- the starting fluid passage is partially defined by a distal end surface of the sleeve opposite a step portion of the sleeve.
Dependencies are inferred from the claim text.