VVC Information - Revision history

Hbaumhardt: /* EU2 & EU3 Differences */

2011-09-19T16:53:21Z

EU2 & EU3 Differences

← Older revision		Revision as of 16:53, 19 September 2011
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	4. Dark blue 192cc/min injectors (EU2 cream 218cc/min)		4. Dark blue 192cc/min injectors (EU2 cream 218cc/min)

	5. TF160 pistons with marginally higher compression and expanded ring belt to strengthen ring lands, indentifiable by '160' engraved on the crown		5. TF160 pistons with marginally higher compression and expanded ring belt to strengthen ring lands, indentifiable by '160' engraved on the crown (EU2 standard pistons)

	6. ~~Machining of the head around the inlet and exhaust valves~~ (~~triple-angle valve seats~~) ~~both in the valve throats and combustion chamber to improve low lift flow~~		6. Double tang conrods (EU2 single tang)

	7. ~~VVC control connectors are differnt colours~~ and ~~have different keyways~~		7. Machining of the head around the inlet and exhaust valves (triple-angle valve seats) both in the valve throats and combustion chamber to improve low lift flow

	8. ~~IACV MDQ100170 is PWM (EU2 is Stepper)~~		8. VVC control connectors are differnt colours and have different keyways

	9. Cam Position Sensor NSC000010 may have a longer pickup (EU2 is NSC100380)		9. IACV MDQ100170 is PWM (EU2 is Stepper)

			10. Cam Position Sensor NSC000010 may have a longer pickup (EU2 is NSC100380)

	==VVC Failure Modes==		==VVC Failure Modes==

Hbaumhardt: /* VVC Failure Modes */

2011-06-08T13:01:52Z

VVC Failure Modes

← Older revision		Revision as of 13:01, 8 June 2011
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	==VVC Failure Modes==		==VVC Failure Modes==
	ECT Sensor ~~Error~~ limits to 6K RPM		ECT Sensor low/error limits to 6K RPM

	MAP Sensor ~~Error~~ limits to 6K RPM		MAP Sensor error limits to 6K RPM

			VVC Oil Temp Sensor low/error limites to 6K RPM

	VVC Solenoid low resistance (should be 6.6 to 8.8 Ohms) limits to 5.5K RPM		VVC Solenoid low resistance (should be 6.6 to 8.8 Ohms) limits to 5.5K RPM

Hbaumhardt: /* VVC Failure Modes */

2011-06-05T09:17:38Z

VVC Failure Modes

← Older revision		Revision as of 09:17, 5 June 2011
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	==VVC Failure Modes==		==VVC Failure Modes==
	ECT Sensor Error ~~Limits~~ to 6K RPM		ECT Sensor Error limits to 6K RPM

	MAP Sensor Error limits to 6K RPM		MAP Sensor Error limits to 6K RPM

	VVC Solenoid low resistance (should be 6.6 to 8.8 Ohms) ~~Limits~~ to 5.5K RPM		VVC Solenoid low resistance (should be 6.6 to 8.8 Ohms) limits to 5.5K RPM

	Cam Position Sensor ~~Limits~~ to 5.5K RPM (The VVC CPS is NSC000010 variable reluctance, different to the standard K16 Hall effect)		ECU VVC control circuit fried (from wrong battery polarity) limits to 5.5K RPM

			Cam Position Sensor limits to 5.5K RPM (The VVC CPS is NSC000010 variable reluctance, different to the standard K16 Hall effect)

Hbaumhardt at 16:05, 1 June 2011

2011-06-01T16:05:56Z

← Older revision		Revision as of 16:05, 1 June 2011
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	Excellent write up on the S1 EU2 VVC MEMS 2J logic and failure modes here * http://www.mgfcar.de/library/ENGINE_MANAGEMENT_SYSTEM_VVC_MEMS_2J.htm		Excellent write up on the S1 EU2 VVC MEMS 2J logic and failure modes here * http://www.mgfcar.de/library/ENGINE_MANAGEMENT_SYSTEM_VVC_MEMS_2J.htm

	Excellent write up on the S2 EU3 VVC MEMS 3 logic (which the K4 is based on) and failure modes here *		Excellent write up on the EU3 VVC MEMS 3 logic (which the S2 K4 is based on) and failure modes here *
	http://www.mgfcar.de/library/ENGINE_MANAGEMENT_SYSTEM_%20MPi_VVC_MEMS_3.htm		http://www.mgfcar.de/library/ENGINE_MANAGEMENT_SYSTEM_%20MPi_VVC_MEMS_3.htm

RobC: /* VVC Failure Modes */

2011-05-18T18:47:36Z

VVC Failure Modes

← Older revision		Revision as of 18:47, 18 May 2011
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	Note: Connecting the battery on wrong polarity can blow the K4 ECU VVC control circut, as can running with a low resistance solenoid. Lotus issued a service note on this.		Note: Connecting the battery on wrong polarity can blow the K4 ECU VVC control circut, as can running with a low resistance solenoid. Lotus issued a service note on this.

	~~[img]~~http://wiki.seloc.org/images/a/a2/VVC_Solenoid_SB.jpg~~[/img]~~		http://wiki.seloc.org/images/a/a2/VVC_Solenoid_SB.jpg

	==Lotus S2 K4 ECU VVC Connections==		==Lotus S2 K4 ECU VVC Connections==

RobC: /* VVC Mechanisms Strip down */

2011-05-18T18:46:29Z

VVC Mechanisms Strip down

← Older revision		Revision as of 18:46, 18 May 2011
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	Now the two pins on the cam locate into the to slidey blocks (one on the lower plate and one on the upper one). Its now ready for installation		Now the two pins on the cam locate into the to slidey blocks (one on the lower plate and one on the upper one). Its now ready for installation

	[[~~Image:~~Image:VVC-strippedmech-Step5.jpg]]		[[Image:VVC-strippedmech-Step5.jpg]]

	==VVC Hydraulic Control Unit==		==VVC Hydraulic Control Unit==

RobC: /* VVC Mechanisms Strip down */

2011-05-18T18:46:09Z

VVC Mechanisms Strip down

← Older revision		Revision as of 18:46, 18 May 2011
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	With all the bits removed from the mechanism I gave it a bit of a clean out then applied some fresh engine oil into it. Added the outer sleeve to the housing ready for the first plate.		With all the bits removed from the mechanism I gave it a bit of a clean out then applied some fresh engine oil into it. Added the outer sleeve to the housing ready for the first plate.

	[[~~ImageVVC~~-strippedmech-Step1.jpg]]		[[Image:VVC-strippedmech-Step1.jpg]]

	First insert the first plate, this goes in with the lip at the bottom		First insert the first plate, this goes in with the lip at the bottom
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	Taking the next plate (lip on top this time) and fitting the bearing cage before fitting both into the housing, noting that the large hole allows access to the slidey block on the lower plate that didn’t have the pin in. (this will be a locating hole for one of the cam pins) One of slidey blocks goes over the second pin that is fixed to the bottom of the housing. The last slidey block is ready to take the second pin from the cam.		Taking the next plate (lip on top this time) and fitting the bearing cage before fitting both into the housing, noting that the large hole allows access to the slidey block on the lower plate that didn’t have the pin in. (this will be a locating hole for one of the cam pins) One of slidey blocks goes over the second pin that is fixed to the bottom of the housing. The last slidey block is ready to take the second pin from the cam.

	[[~~Image:~~Image:VVC-strippedmech-Step4.jpg]]		[[Image:VVC-strippedmech-Step4.jpg]]

	Now the two pins on the cam locate into the to slidey blocks (one on the lower plate and one on the upper one). Its now ready for installation		Now the two pins on the cam locate into the to slidey blocks (one on the lower plate and one on the upper one). Its now ready for installation

RobC: /* VVC Mechanisms Strip down */

2011-05-18T18:45:36Z

VVC Mechanisms Strip down

← Older revision		Revision as of 18:45, 18 May 2011
Line 161:		Line 161:
	With all the bits removed from the mechanism I gave it a bit of a clean out then applied some fresh engine oil into it. Added the outer sleeve to the housing ready for the first plate.		With all the bits removed from the mechanism I gave it a bit of a clean out then applied some fresh engine oil into it. Added the outer sleeve to the housing ready for the first plate.

	[[~~Image:Image:VVC~~-strippedmech-Step1.jpg]]		[[ImageVVC-strippedmech-Step1.jpg]]

	First insert the first plate, this goes in with the lip at the bottom		First insert the first plate, this goes in with the lip at the bottom

	[[~~Image:~~Image:VVC-strippedmech-Step2.jpg]]		[[Image:VVC-strippedmech-Step2.jpg]]

	Insert the bearing cage, this sits around the plate. Add the two slidey blocks, making sure they are in the right place. They should fit “nice” i.e you don’t need to force them in. One of the slidey blocks sits on one of the pins that is in the bottom of the housing		Insert the bearing cage, this sits around the plate. Add the two slidey blocks, making sure they are in the right place. They should fit “nice” i.e you don’t need to force them in. One of the slidey blocks sits on one of the pins that is in the bottom of the housing

	[[~~Image:~~Image:VVC-strippedmech-Step3.jpg]]		[[Image:VVC-strippedmech-Step3.jpg]]

	Taking the next plate (lip on top this time) and fitting the bearing cage before fitting both into the housing, noting that the large hole allows access to the slidey block on the lower plate that didn’t have the pin in. (this will be a locating hole for one of the cam pins) One of slidey blocks goes over the second pin that is fixed to the bottom of the housing. The last slidey block is ready to take the second pin from the cam.		Taking the next plate (lip on top this time) and fitting the bearing cage before fitting both into the housing, noting that the large hole allows access to the slidey block on the lower plate that didn’t have the pin in. (this will be a locating hole for one of the cam pins) One of slidey blocks goes over the second pin that is fixed to the bottom of the housing. The last slidey block is ready to take the second pin from the cam.

RobC at 18:44, 18 May 2011

2011-05-18T18:44:47Z

← Older revision		Revision as of 18:44, 18 May 2011
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	[[Image:Headbuild-vvctimingfront.jpg]]		[[Image:Headbuild-vvctimingfront.jpg]]

			==VVC Mechanisms Strip down==

			First off here are most of the bits inside of the VVC mechanism housing, I say most because there is a bearing pressed into the housing that doesn’t come out. In this picture you can see the cam, two “plates” with caged bearings and 4 “slidey things” and finally an inner sleeve for want a better word which has the teeth for the VVC sync shaft.

			[[Image:Vvc-interntals.jpg]]

			At this point I have to point out that it was very important to mark every item if disassembling as the “slidey” bits do wear a little and if not fitted into the same place on reassembly they don’t slide properly. Same goes for the plates.

			With all the bits removed from the mechanism I gave it a bit of a clean out then applied some fresh engine oil into it. Added the outer sleeve to the housing ready for the first plate.

			[[Image:Image:VVC-strippedmech-Step1.jpg]]

			First insert the first plate, this goes in with the lip at the bottom

			[[Image:Image:VVC-strippedmech-Step2.jpg]]

			Insert the bearing cage, this sits around the plate. Add the two slidey blocks, making sure they are in the right place. They should fit “nice” i.e you don’t need to force them in. One of the slidey blocks sits on one of the pins that is in the bottom of the housing

			[[Image:Image:VVC-strippedmech-Step3.jpg]]

			Taking the next plate (lip on top this time) and fitting the bearing cage before fitting both into the housing, noting that the large hole allows access to the slidey block on the lower plate that didn’t have the pin in. (this will be a locating hole for one of the cam pins) One of slidey blocks goes over the second pin that is fixed to the bottom of the housing. The last slidey block is ready to take the second pin from the cam.

			[[Image:Image:VVC-strippedmech-Step4.jpg]]

			Now the two pins on the cam locate into the to slidey blocks (one on the lower plate and one on the upper one). Its now ready for installation

			[[Image:Image:VVC-strippedmech-Step5.jpg]]

			==VVC Hydraulic Control Unit==

			HCU is oil pressure controlled, the piston operates the VVC sync shaft which inturn changes the cam timing.

			In a few bits

			[[Image:HCU-Exploded.jpg]]

			VVC gaskets, this is available from Rimmer Bros or PTP

			[[Image:VVCgaskets.jpg]]

			HCU piston assembled

			[[Image:VVC-HCU.jpg]]

			The heart of the control mechanism of the HCU is the “spool valve”, this looks like a pipe which is full of holes.

			[[Image:VVC-internal.jpg]]

RobC at 18:32, 18 May 2011

2011-05-18T18:32:38Z

@@ Line 102: / Line 102: @@
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 ==VVC and Emerald ECU==