The All New AJV8

Sandford, Malcolm H.; Page, G W; Crawford, Paul

doi:10.4271/2009-01-1060

Cited by 42 publications

(25 citation statements)

References 3 publications

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“…The PFI system was fed by a rail in the feed line to the high-pressure pumps, and they operated at 4.5 bar above boost pressure. Maximum injection pressure for the DI system was 200 bar, higher than the 150 bar maximum of the standard AJ133 [18].…”

Section: Turner Et Al / Sae Int J Engines / Volume 7 Issue 1 (May mentioning

confidence: 99%

“…This approach has been discussed in a previous publication [17], and was chosen since the general engine structure and main bearings were already known to be capable of handling the stresses imposed by the power and torque targets; essentially, these components are used in the supercharged version of the AJ133 engine which has much higher ratings than the NA variant [18].…”

Section: Major Technologies Employed On the Core Ub100 Enginementioning

confidence: 99%

“…The only compromise associated with adopting the approach of using the AJ133 cylinder block was that the cylinder head bolt spacing would have to be the same as that of the donor V8, which has a much bigger bore of 92.5 mm and an associated cylinder centre distance of 100 mm [18]. A completely new cylinder head was designed with these criteria in mind which incorporated a second-generation close-spaced DI combustion system, cam profile switching (CPS) on both the inlet and exhaust cams and the new inlet ports.…”

Section: Major Technologies Employed On the Core Ub100 Enginementioning

confidence: 99%

“…The UB100 engine also used the standard water, oil and high pressure fuel pumps, main bearing shells and fuel rails of the AJ133, plus other parts as suited to the task. For general design information on the donor AJ133 engine, including its use of a sump-mounted auxiliary shaft to drive the fuel pumps (rather than using the camshafts), see [18].…”

Section: Major Technologies Employed On the Core Ub100 Enginementioning

confidence: 99%

“…The DI injector and spark plugs were packaged in a similar 'asymmetric' arrangement to AJ133 [18], and the coolant jacket was optimized to achieve target heat transfer coefficients (HTCs) with minimal pressure drop.…”

Section: Cylinder Head Assemblymentioning

confidence: 99%

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Ultra Boost for Economy: Extending the Limits of Extreme Engine Downsizing

Turner

Popplewell

Patel

et al. 2014

SAE Int. J. Engines

147

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The paper discusses the concept, design and final results from the 'Ultra Boost for Economy' collaborative project, which was part-funded by the Technology Strategy Board, the UK's innovation agency. The project comprised industry-and academiawide expertise to demonstrate that it is possible to reduce engine capacity by 60% and still achieve the torque curve of a modern, large-capacity naturally-aspirated engine, while encompassing the attributes necessary to employ such a concept in premium vehicles.In addition to achieving the torque curve of the Jaguar Land Rover naturally-aspirated 5.0 litre V8 engine (which included generating 25 bar BMEP at 1000 rpm), the main project target was to show that such a downsized engine could, in itself, provide a major proportion of a route towards a 35% reduction in vehicle tailpipe CO 2 on the New European Drive Cycle, together with some vehicle-based modifications and the assumption of stop-start technology being used instead of hybridization. In order to do this vehicle modelling was employed to set part-load operating points representative of a target vehicle and to provide weighting factors for those points. The engine was sized by using the fuel consumption improvement targets and a series of specification steps designed to ensure that the required full-load performance and driveability could be achieved.The engine was designed in parallel with 1-D modelling which helped to combine the various technology packages of the project, including the specification of an advanced charging system and the provision of the necessary variability in the valvetrain system. An advanced intake port was designed in order to ensure the necessary flow rate and the charge motion to provide fuel mixing and help suppress knock, and was subjected to a full transient CFD analysis. A new engine management system was provided which necessarily had to be capable of controlling many functions, including a supercharger engagement clutch and full bypass system, direct injection system, port-fuel injection system, separately-switchable cam profiles for the intake and exhaust valves and wide-range fast-acting camshaft phasing devices.

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Section: Turner Et Al / Sae Int J Engines / Volume 7 Issue 1 (May mentioning

confidence: 99%

Section: Major Technologies Employed On the Core Ub100 Enginementioning

confidence: 99%

Section: Major Technologies Employed On the Core Ub100 Enginementioning

confidence: 99%

Section: Major Technologies Employed On the Core Ub100 Enginementioning

confidence: 99%

Section: Cylinder Head Assemblymentioning

confidence: 99%

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