Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
277 words
A V-type engine comprising a cylinder block, and first and second cylinder heads mounted on the cylinder block to form first and second cylinder banks arranged in V-shape, the front end face of the cylinder block at the first cylinder bank being substantially flush with the front end face of the same at the second cylinder bank, the rear end face of the cylinder block at the first cylinder bank being substantially flush with the rear end face of the same at the second cylinder bank, said first and second cylinder heads being shaped to conform to the shape of the cylinder block, each cylinder bank being provided with a row of cylinders extending axially between the front and rear end faces thereof, the row of the cylinders in the first cylinder bank starting from a location spaced apart from the front end face and terminating at a location near the rear end face and the row of the cylinders in the second cylinder bank starting from a location near the front end face and terminating at a location spaced apart from the rear end face so that the row of the cylinders in the first cylinder bank is axially rearwardly displaced from that in the second cylinder bank, characterized in that at least one oil-return passage communicating with a space defined by the corresponding cylinder head is formed in the cylinder block at, at least, one of the locations between the front end face of the cylinder block and the foremost cylinder in the first cylinder bank and between the rear end face of the cylinder block and the rearmost cylinder in the second cylinder bank.
Claim 2
Dependent Claim
277 words
A V-type engine comprising a cylinder block, and first and second cylinder heads mounted on the cylinder block to form first and second cylinder banks arranged in V-shape, the front end face of the cylinder block at the first cylinder bank being substantially flush with the front end face of the same at the second cylinder bank, the rear end face of the cylinder block at the first cylinder bank being substantially flush with the rear end face of the same at the second cylinder bank, said first and second cylinder heads being shaped to conform to the shape of the cylinder block, each cylinder bank being provided with a row of cylinders extending axially between the front and rear end faces thereof, the row of the cylinders in the first cylinder bank starting from a location spaced apart from the front end face and terminating at a location near the rear end face and the row of the cylinders in the second cylinder bank starting from a location near the front end face and terminating at a location spaced apart from the rear end face so that the row of the cylinders in the first cylinder bank is axially rearwardly displaced from that in the second cylinder bank, characterized in that at least one oil-return passage communicating with a space defined by the corresponding cylinder head is formed in the cylinder block at, at least, one of the locations between the front end face of the cylinder block and the foremost cylinder in the first cylinder bank and between the rear end face of the cylinder block and the rearmost cylinder in the second cylinder bank.
Claim 3
Dependent Claim
62 words
A V-type engine as defined in claim 1 in which a pair of the oil-return passages are formed in the cylinder block respectively at locations between the front end face of the cylinder block and the foremost cylinder in the first cylinder bank and between the rear end face of the cylinder block and the rearmost cylinder in the second cylinder bank.
Claim 4
Dependent Claim
35 words
A V-type engine as defined in claim 2 in which a pressure buffer chamber communicating with the interior of the crankcase defined by the cylinder block is provided between the first and second cylinder banks.
Claim 5
Dependent Claim
37 words
A V-type engine as defined in claim 3 in which both said oil-return passages are communicated with the pressure buffer chamber, whereby said space defined by the cylinder heads are communicated with the interior of the crankcase.
Claim 6
Dependent Claim
32 words
A V-type engine as defined in claim 4 in which at least one of said oil-return passages is directly communicated with the interior of the crankcase by way of a communicating section.
Claim 7
Dependent Claim
15 words
A V-type engine as defined in claim 5 in which said communicating section is narrowed.
Claim 8
Dependent Claim
32 words
A V-type engine as defined in claim 2 in which said first and second cylinder heads are identical to each other and are positioned rotated by 180° with respect to each other.