EP0125531A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
V-type engine
Assignee: Mazda Motor Corp
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Filing: 1984-04-19
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Granted: —
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Expires: 2004-04-19
Abstract
Abstract A V-type engine comprises a cylinder block forming first and second cylinder banks arranged in V-shape. Each cylinder bank is provided with a row of cylinders extending in the axial direction of the crankshaft between the front and rear ends of the engine. The cylinder row in the second cylinder bank starts from a location spaced apart from the front end of the engine and the cylinder row in the first cylinder bank starts from a location near the front end of the engine so that the cylinder row in the second cylinder bank is axially rearwardly displaced from that in the first cylinder bank. A water pump is mounted on the front end of the cylinder block substantially at the center between the first and second cylinder banks. An coolant inlet-passage to the water pump is provided in the part of the cylinder block between the foremost cylinder in the second bank and the front end of the cylinder block, which part is a dead space.
Inventors
- 👤 Haruyoshi Ishimi
- 👤 Koji Asanomi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 07:15
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F01; F01P; F01P11/00; F01P11/04; F01P5/00; F01P5/10; F02B2075/1804; F02B2075/1824; F02B2275/00; F02B2275/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
232 words
A V-type engine comprising a cylinder block having first and second cylinder banks, each cylinder bank being provided with a row of a plurality of cylinders extending between front and rear end faces of the cylinder block in the axial direction of the crankshaft, the row of the cylinders in the first cylinder bank starting from a location near the front end face of the cylinder block and the row of the cylinders in the second cylinder bank starting from a location spaced apart from the front end face of the cylinder block, wherein the improvement comprises that a water pump of an engine cooling system is mounted on the front end face of the cylinder block substantially at the center between the first and second cylinder banks, and a coolant inlet-passage to the water pump is formed in the part of the cylinder block between the front end face of the cylinder block at the second cylinder bank and the foremost cylinder in the second cylinder bank, the water pump having a pump chamber in which an impeller is rotated, said coolant inlet-passage being communicated with the pump chamber at one end and with a discharge conduit of a radiator at the other end, and said pump chamber being communicated with water jackets formed in the first and second cylinder banks respectively by way of first and second coolant feed passages.
Claim 2
Dependent Claim
232 words
A V-type engine comprising a cylinder block having first and second cylinder banks, each cylinder bank being provided with a row of a plurality of cylinders extending between front and rear end faces of the cylinder block in the axial direction of the crankshaft, the row of the cylinders in the first cylinder bank starting from a location near the front end face of the cylinder block and the row of the cylinders in the second cylinder bank starting from a location spaced apart from the front end face of the cylinder block, wherein the improvement comprises that a water pump of an engine cooling system is mounted on the front end face of the cylinder block substantially at the center between the first and second cylinder banks, and a coolant inlet-passage to the water pump is formed in the part of the cylinder block between the front end face of the cylinder block at the second cylinder bank and the foremost cylinder in the second cylinder bank, the water pump having a pump chamber in which an impeller is rotated, said coolant inlet-passage being communicated with the pump chamber at one end and with a discharge conduit of a radiator at the other end, and said pump chamber being communicated with water jackets formed in the first and second cylinder banks respectively by way of first and second coolant feed passages.
Claim 3
Dependent Claim
46 words
A V-type engine as defined in Claim 1 in which said other end of the coolant inlet-passage to the water pump opens in the front end face of the cylinder block to form an inlet thereinto to which the discharge conduit of the radiator is connected.
Claim 4
Dependent Claim
51 words
A V-type engine as defined in Claim 1 in which said other end of the coolant inlet-passage to the water pump opens in the outer side face of the cylinder block at the second cylinder bank to form an inlet thereinto to which the discharge conduit of the radiator is connected.
Claim 5
Dependent Claim
60 words
A V-type engine as defined in Claim 1 in which said pump chamber is formed by the front end face of the cylinder block and a pump housing directly fixed to the front end face of the cylinder block, said one end of the coolant inlet-passage to the water pump opening in the front end face of the cylinder block.
Claim 6
Dependent Claim
52 words
A V-type engine as defined in Claim 4 in which said impeller is fixedly mounted on the rear end of a rotary shaft which is mounted on the pump housing for rotation at the front end portion thereof, the rotary shaft being arranged to be driven by the crankshaft of the engine.
Claim 7
Dependent Claim
59 words
A V-type engine as defined in Claim 1 in which each of said coolant feed passages has an inner wall portion extending substantially in the axial direction of the crankshaft and an outer wall portion inclined outwardly with respect to the axial direction of the crankshaft so that the coolant feed passage is flared toward the corresponding water jacket.
Claim 8
Dependent Claim
43 words
A V-type engine as defined in Claim 6 in which said outer wall portion of the second coolant feed passage is inclined with respect to the axial direction of the crankshaft less than the outer wall portion of the first coolant feed passage.
Claim 9
Dependent Claim
46 words
A V-type engine as defined in Claim 1 in which the wall portion in the cylinder block defining said coolant inlet-passage is partly common with the wall portion defining the cylinder nearest to the front end face of the cylinder block in the second cylinder bank.
Claim 10
Dependent Claim
90 words
A V-type engine as defined in Claim 1 further comprising first and second camshafts respectively mounted for rotation on the first and second cylinder banks, the first and second camshafts being operatively connected with the crankshaft to be rotated in synchronization therewith, by way of cam pulleys fixedly mounted on one ends of the respective camshafts, a crank pulley fixedly mounted on the corresponding end of the crankshaft and a transmission member entrained around the cam pulleys and the crank pulleys, said water pump being disposed inside the transmission member.
References Cited (Backward Citations)
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