GB2343665A - A hydraulically damped engine mounting arrangement having two load bearing mounts and two tie bars - Google Patents

A hydraulically damped engine mounting arrangement having two load bearing mounts and two tie bars Download PDF

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Publication number
GB2343665A
GB2343665A GB9824662A GB9824662A GB2343665A GB 2343665 A GB2343665 A GB 2343665A GB 9824662 A GB9824662 A GB 9824662A GB 9824662 A GB9824662 A GB 9824662A GB 2343665 A GB2343665 A GB 2343665A
Authority
GB
United Kingdom
Prior art keywords
engine
hydraulic
body structure
tie bars
motor vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9824662A
Other versions
GB9824662D0 (en
Inventor
Trevor Smith
Graham Edward Vanhouse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MG Rover Group Ltd
Original Assignee
MG Rover Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MG Rover Group Ltd filed Critical MG Rover Group Ltd
Priority to GB9824662A priority Critical patent/GB2343665A/en
Publication of GB9824662D0 publication Critical patent/GB9824662D0/en
Publication of GB2343665A publication Critical patent/GB2343665A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K5/12—Arrangement of engine supports
    • B60K5/1208—Resilient supports
    • B60K5/1216—Resilient supports characterised by the location of the supports relative to the motor or to each other

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

An engine mounting system for attaching an engine 5 to a body structure 4 of a motor vehicle comprises two spaced apart load bearing hydraulically damped mounts 7, 8 disposed at opposite ends of an engine 5 and two tie bars 9, 10 connected between the engine 5 at upper and lower positions to the body structure 4. Both of the tie bars 9, 10 includes at least one hydraulic damping means to damp out vibrations from the engine 5 to the body structure 4.

Description

A Motor Vehicle and an Engine Mounting Svstem Therefor This invention relates to a motor vehicle and in particular to a system for mounting an engine in a motor vehicle.
It is well known to attach the engine of a motor vehicle to part of the body structure of the motor vehicle using one or more elastomeric engine mountings to support the weight of the engine and a tie bar to resist rotation of the engine about a longitudinal axis extending along the engine.
It has recently become popular to replace the elastomeric mounting with so called hydromounts that include both elastomeric material and fluid to damp out vibrations. Examples of such hydromounts are disclosed in US Patent number 4,588,173 and French Application number 2,686,957.
It is further known from GB-A-2,314,401 to provide a hydraulic tie bar or torque strut having damping characteristics that inhibit low frequency resonance of the engine and air pockets to decouple high frequency vibrations.
It is an object of this invention to provide an engine mounting system that offers superior noise and vibration isolation characteristics.
According to the invention there is provided a motor vehicle having a body structure an engine having a crankshaft rotatable about a longitudinal axis and an engine mounting system to attach the engine to the body structure wherein the mounting system comprises of four spaced apart mounts each of which includes a hydraulic damping means, there being two load bearing hydraulic supports attaching the engine to the body structure so as to support the engine in a substantially vertical direction and two hydraulic tie bars attaching the engine to the body structure so as to resist rotation of the engine about the longitudinal axis.
The two hydraulic tie bars may be arranged so that irrespective of the direction of rotation of the engine that has to be resisted one of the tie bars is placed in tension and one of the tie bars is placed in compression.
The two tie bars may be connected between an upper part of the engine and the body structure and the other of the two tie bars may be connected between a lower part of the engine and the body structure.
The two hydraulic load bearing supports may be connected to the engine at opposite ends thereof.
The engine may have a transmission attached thereto and one of the hydraulic load bearing supports may be arranged to connect the transmission to the body structure and the other of the load bearing supports may be arranged to connect the engine to the body structure. Preferably, the two hydraulic load bearing supports are connected to the engine and transmission assembly at opposite ends thereof.
One of the load bearing supports and one of the hydraulic tie bars may be connected to the engine at the same position.
One of the tie bars may have hydraulic damping means at both ends, there being a first hydraulic damping means between the tie bar and the engine and a second hydraulic damping means between the tie bar and the body structure.
Preferably, both of the tie bars have a hydraulic damping means at both ends to damp vibrations between the engine and the body structure.
The invention will now be described by way of example with reference to the accompanying drawing of which: Fig. 1 is a side view of an engine and an engine mounting system forming part of a motor vehicle according to the invention; Fig. 2 is an end view of the engine shown in Fig. 1 in the direction of arrow Y; and Fig. 3 is a view in the direction of arrow X on Fig. 1.
With reference to Figs. 1 to 3 there is shown an engine 5 connected to part of a body structure 4 of a motor vehicle by means of an engine mounting system.
The engine 5 has a crankshaft (not shown) rotatable about a longitudinal axis L-L. A transmission in the form of a gearbox 6 is attached to one end of the engine 5 to form an engine and transmission assembly.
The engine mounting system comprises of a first hydraulic damping means in the form of a first hydraulic support 7, a second hydraulic damping means in the form of a second load bearing hydraulic support 8, a first hydraulic tie bar 9 and a second hydraulic tie bar 10.
The first or upper hydraulic tie bar 9 has a first hydraulic damping means 11 interposed between the tie rod and the body structure 4 and a second hydraulic damping means 12 interposed between the tie rod and a bracket 13 extending from the engine 5. The upper tie bar 9 is of the same form as that disclosed in GB-A2,314,410 and will not be described in further detail.
The second or lower tie bar 10 has a first hydraulic damping means 14 interposed between the tie bar and the body structure 4 and an elastomeric mount 15 interposed between the tie bar and a bracket 16 attached to a lower face 17 of the engine 5. The two tie bars 9,10 are disposed on opposite sides of the longitudinal axis L-L. Therefore, irrespective of the direction in which a pitching or torque force P occurs one of the tie bars will always be in tension and the other of the tie bars will always be in compression. For example, if the applied torque is in the direction P+ then the tie bar 10 is in tension and the tie bar 9 will be in compression. Alternatively, if the applied force is in the direction P-then the tie bar 9 will be in tension and the tie bar 10 will be in compression.
The first and second load bearing hydraulic supports 7,8 are used to support the weight of the engine 5 and also to resist roll of the engine 5 in the direction of arrow R and bounce of the engine 5 in the direction of arrow B. Both of the load bearing hydraulic supports 7, 8 include both elastomeric resilient means and a hydraulic damping structure.
To maximise the effect of the load bearing hydraulic supports 7,8 they are disposed at opposite ends of the engine 5 and as shown in Figs. 1 to 2 the first of said hydraulic load bearing supports is also used to support weight of the gearbox 6. By spacing the two load bearing supports 7,8 as far apart as possible the force required by each support to resist the roll forces R is the minimum possible.
The second load bearing hydraulic support 8 is interposed between the body structure 4 and the bracket 13 used to connect the upper tie bar 9 to the engine 5.
The structure of the second load bearing hydraulic support is very much as that shown in French Patent Application number 2,686,957 and will not be described in further detail.
It will be appreciated that the lower part tie bar 10 could be of the same form as that used for the upper tie bar that is to say having hydraulic damping means at both ends or of the form shown in EP 0 566 178 having a hydraulic damping means at only one end.
Hydraulic tie bar as meant herein includes a tie bar having a hydraulic damper at one end or at both ends.

Claims (10)

  1. CLAIMS 1. A motor vehicle having a body structure, an engine having a crankshaft rotatable about a longitudinal axis and an engine mounting system to attach the engine to the body structure wherein the mounting system comprises of four spaced apart mounts each of which includes a hydraulic damping means, there being two load bearing hydraulic supports attaching the engine to the body structure so as to support the engine in a substantially vertical direction and two hydraulic tie bars attaching the engine to the body structure so as to resist rotation of the engine about the longitudinal axis.
  2. 2. A motor vehicle as claimed in Claim 1 in which the two hydraulic tie bars are arranged so that irrespective of the direction of rotation that has to be resisted one of the tie bars is placed in tension and one of the tie bars is placed in compression.
  3. 3. A motor vehicle as claimed in Claim 1 or in Claim 2 in which one of the two tie bars is connected between an upper part of the engine and the body structure and the other of the two tie bars is connected between a lower part of the engine and the body structure.
  4. 4. A motor vehicle as claimed in any of Claims 1 to 3 in which the two hydraulic load bearing supports are connected to the engine at opposite ends thereof.
  5. 5. A motor vehicle as claimed in any preceding claim in which the engine has a transmission attached thereto and one of hydraulic load bearing supports is arranged to connect the transmission to the body structure and the other of the load bearing supports is arranged to connect the engine to the body structure.
  6. 6. A motor vehicle as claimed in Claim 5 in which the two hydraulic load bearing supports are connected to the engine and transmission assembly at opposite ends thereo
  7. 7. A motor vehicle as claimed in any preceding claim in which one of the load bearing supports and one of the hydraulic tie bars is connected to the engine at the same position.
  8. 8. A motor vehicle as claimed in any preceding claim in which one of the tie bars has a hydraulic damping means at both ends, there being a first hydraulic damping means between the tie bar and the engine and a second hydraulic damping means between the tie bar and the body structure.
  9. 9. A motor vehicle as claimed in Claim 8 in which both of the tie bars have hydraulic damping means at both ends.
  10. 10. A motor vehicle substantially as described herein with reference to the accompanying drawing.
GB9824662A 1998-11-11 1998-11-11 A hydraulically damped engine mounting arrangement having two load bearing mounts and two tie bars Withdrawn GB2343665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9824662A GB2343665A (en) 1998-11-11 1998-11-11 A hydraulically damped engine mounting arrangement having two load bearing mounts and two tie bars

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9824662A GB2343665A (en) 1998-11-11 1998-11-11 A hydraulically damped engine mounting arrangement having two load bearing mounts and two tie bars

Publications (2)

Publication Number Publication Date
GB9824662D0 GB9824662D0 (en) 1999-01-06
GB2343665A true GB2343665A (en) 2000-05-17

Family

ID=10842216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9824662A Withdrawn GB2343665A (en) 1998-11-11 1998-11-11 A hydraulically damped engine mounting arrangement having two load bearing mounts and two tie bars

Country Status (1)

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GB (1) GB2343665A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1533163A1 (en) * 2003-11-20 2005-05-25 HONDA MOTOR CO., Ltd. Supporting apparatus for a vehicular power unit
DE102008014940A1 (en) 2007-05-31 2008-12-04 Ford Global Technologies, LLC, Dearborn Pluggable body support damping device of a motor vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB554692A (en) * 1942-01-10 1943-07-15 Austin Motor Co Ltd Improvements in mountings of internal combustion engines
GB1434453A (en) * 1973-08-08 1976-05-05 Gen Motors Corp Rotary piston engine and transmission assembly mounting system
EP0566178A1 (en) * 1992-04-17 1993-10-20 General Motors Corporation Hydraulic torque strut with decoupling and related mounting system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB554692A (en) * 1942-01-10 1943-07-15 Austin Motor Co Ltd Improvements in mountings of internal combustion engines
GB1434453A (en) * 1973-08-08 1976-05-05 Gen Motors Corp Rotary piston engine and transmission assembly mounting system
EP0566178A1 (en) * 1992-04-17 1993-10-20 General Motors Corporation Hydraulic torque strut with decoupling and related mounting system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1533163A1 (en) * 2003-11-20 2005-05-25 HONDA MOTOR CO., Ltd. Supporting apparatus for a vehicular power unit
CN1305696C (en) * 2003-11-20 2007-03-21 本田技研工业株式会社 Supporting apparatus for a vehicular power unit
DE102008014940A1 (en) 2007-05-31 2008-12-04 Ford Global Technologies, LLC, Dearborn Pluggable body support damping device of a motor vehicle
DE102008014941A1 (en) 2007-05-31 2008-12-04 Ford Global Technologies, LLC, Dearborn Body carrier with a plug-in damping device for a motor vehicle
US8308148B2 (en) 2007-05-31 2012-11-13 Ford Global Technologies, Llc Plug-in body mount damping device for vehicles
DE102008014941B4 (en) 2007-05-31 2021-12-09 Ford Global Technologies, Llc Body / frame assembly arrangement, motor vehicle and method for damping operating loads in a body component

Also Published As

Publication number Publication date
GB9824662D0 (en) 1999-01-06

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