EP0402719A1
Expired / Lapsed
EP
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An automitive internal combustion engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1990-06-01
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Granted: —
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Expires: 2010-06-01
Abstract
Abstract The invention relates to an automotive internal combustion engine mounted as a transverse engine into a vehicle compartment (1) in a manner that the cylinder bank of the engine extends rearwards from a vertical. Moreover, an output shaft (16) is provided in parallel with the crankshaft (6) in order to transmit the output power of the engine to the drive wheel shafts. Said output shaft (16) is disposed in such a manner that a plane (L2) containing the axis of the crankshaft and the axis of the output shaft intersects at an acute angle with another plane which is defined by the axis of the cylinder barrels of the cylinder bank.
Inventors
- 👤 Kaoru Okui
- 👤 Manabu Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 17:20
CPC Classifications
F; F02; F02B; F02B61/00; F02B61/06; B; B60; B60K; B60K5/00; B60K5/04; F02B75/00; F02B75/16; F02B75/18; F02B75/20; F01; F01M; F01M1/00; F01M1/12; F01M2001/126; F02B2075/1804; F02B2075/1824; F02B2275/00; F02B2275/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
An automative internal combustion engine comprising a crankshaft extending transversely to the longitudinal axis of the vehicle, a cylinder bank which is inclined rearward from a vehicle and an output shaft which is disposed in parallel with the crankshaft, i.e., for transmitting the output power of the crankshaft to wheel shafts, characterized in that, said output shaft (16) of the engine (4) is disposed slantly forwardly above said crankshaft (6) in such a manner that a plane (L2) including both the axis of the crankshaft (6) and the axis of the output shaft (16) intersects with a plane (L1) including the cylinder axis of the cylinder bank at an acute angle (φ).
Claim 2
Dependent Claim
112 words
An automative internal combustion engine comprising a crankshaft extending transversely to the longitudinal axis of the vehicle, a cylinder bank which is inclined rearward from a vehicle and an output shaft which is disposed in parallel with the crankshaft, i.e., for transmitting the output power of the crankshaft to wheel shafts, characterized in that, said output shaft (16) of the engine (4) is disposed slantly forwardly above said crankshaft (6) in such a manner that a plane (L2) including both the axis of the crankshaft (6) and the axis of the output shaft (16) intersects with a plane (L1) including the cylinder axis of the cylinder bank at an acute angle (φ).
Claim 3
Dependent Claim
61 words
An automotive internal combustion engine as claimed in Claim 1, characterized in that, an oil tank (15) is disposed beneath the plane (L2) including both the axis of the crankshaft (6) and the axis of the output shaft (16) slantly forwardly with respect to the crankshaft/output shaft assembly (6, 16), said oil tank (15) facing to the front of the vehicle.
Claim 4
Dependent Claim
52 words
An automotive internal combustion engine as claimed in at least one of the preceding Claims 1 or 2, characterized in that, the rearwardly inclined cylinder bank is adapted to overlay the front wheel shafts (2) of the vehicle, with the crankshaft (6) being disposed in front of said front wheel shafts (2).
Claim 5
Dependent Claim
73 words
An automotive internal combustion engine as claimed in any of the preceding Claims 1 to 3, characterized in that, each cylinder head 11 of each cylinder is supplied with intake air through an associated intake pipe (41) which is connected to a surge tank (42) which extends substantially in parallel to the cylinder bank above the oil tank (15) or the output shaft (16), supported on the cylinder block (7) through stays (43).
Claim 6
Dependent Claim
48 words
An automotive internal combustion engine as claimed in Claim 4, characterized in that, the air intake pipe comprises a curved portion (41) associated to the cylinder head (11) and neighboured to an alternator (52), and a straight section connected to the surge tank (42) at the end thereof.
Claim 7
Dependent Claim
29 words
An automotive internal combustion engine as claimed in any of the preceding Claims 1 to 5, characterized in that, the output shaft (16) supports an accessory drive pulley (50).
Claim 8
Dependent Claim
48 words
An automotive internal combustion engine as claimed in any of the preceding Claims 1 to 6, characterized in that, the output shaft supports at the one end thereof a friction clutch, specifically a single-plate dry-type clutch (400) the output shaft of which is connected o a transmission (47).
Claim 9
Dependent Claim
52 words
An automotive internal combustion engine as claimed in any of the preceding Claims 1 to 6, characterized in that, the output shaft supports at the one end thereof a torque converter (502) adapted to transfer the output power of the output shaft 16 via an impeller shaft (506) to an automatic transmission.
Claim 10
Dependent Claim
69 words
An automotive internal combusiton engine as claimed in Claim 5, characterized in that, the surge tank (42) accomodates a throttle valve (44) at the air inlet side thereof and is tapered from the upstream inlet side to the downstream side of the surge tank (42) with a gradually decreasing cross-sectional area of the surge tank adapted to increase the air flow speed of the intake air in downstream direction.
Claim 11
Dependent Claim
53 words
An automotive internal combustion engine as claimed in Claim 9, characterized in that, a connecting angle in between the intake pipes (41) and the surge tank (42) varies along the surge tank in a manner to allow air to be evenly supplied to each of the cylinders through the respective intake pipe 41.
Claim 12
Dependent Claim
63 words
An automotive internal combustion engine as claimed in at least one of the preceding claims 1 to 10, characterized in that, the axis of a crankshaft (48) supporting the output side of the transmission (47) is disposed substantially on the notional plane containing the axis of the wheel shafts (2) and the axis of the output shaft (16) or being located adjacent thereto.
Claim 13
Dependent Claim
85 words
An internal combustion engine as claimed in claim 11, characterized in that, the diameter of the final gear (49) disposed on a wheel shaft (2) is reduced resulting in an increase of the distance in between the drive unit of the vehicle and the ground resulting from the acute angle (φ) in between the plane (L1) including the cylinder axis of the cylinder bank and the other plane (L2) including both the axis of the crankshaft (6) and the axis of the output shaft (16).
References Cited (Backward Citations)
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