Engine & Compression Brake - Revision history

Slobodan: Tweaks

2025-03-17T23:21:28Z

Tweaks

← Older revision		Revision as of 23:21, 17 March 2025
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	Disengaging {{pll\|Throttle\|throttle}} of an engine naturally leads it to drop RPM. However, because the {{pll\|Mechanical Transmission\|mechanical transmission}} has such a ~~tight bond~~ between the engine and the wheels, slowing down of the engine causes the vehicle to slow down too, if the {{pll\|Reverser\|reverser}} is set in the direction of travel. Selecting a gear where RPM is high gets the most out of an engine brake, and if a train is light enough it will slow down from mere disengagement of the throttle.		Disengaging {{pll\|Throttle\|throttle}} of an engine naturally leads it to drop RPM. However, because the {{pll\|Mechanical Transmission\|mechanical transmission}} has such a firm link between the engine and the wheels, slowing down of the engine causes the vehicle to slow down too, if the {{pll\|Reverser\|reverser}} is set in the direction of travel. Selecting a gear where RPM is high gets the most out of an engine brake, and if a train is light enough it will slow down from mere disengagement of the throttle.

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	~~Engine losses and compression both~~ exert braking force on the transmission, which may contribute to the {{pll\|Powertrain Overheating\|warming up of the transmission hydraulic fluid}}.		Disengaged engines exert braking force on the transmission, which may contribute to the {{pll\|Powertrain Overheating\|warming up of the transmission hydraulic fluid}}.

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Slobodan: Cleanup

2025-03-11T16:29:05Z

Cleanup

← Older revision		Revision as of 16:29, 11 March 2025
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	<translate>		<translate>
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	Engine braking is an alternative way of {{pll\|Braking Overview\|slowing down}} a {{pll\|Rail Vehicle Types\|~~train~~}}, without {{pll\|Wheels & Brakes Damage\|wearing}} and {{pll\|Brake Shoes\|overheating the brake shoes}}. It is a {{pll\|Dynamic Brake\|dynamic braking}} ~~feature of~~ {{pll\|~~Powertrains Overview~~\|diesel-mechanical}} ~~vehicles~~.		Engine braking is an alternative way of {{pll\|Braking Overview\|slowing down}} a {{pll\|Rail Vehicle Types\|motorized rail vehicle}}, without {{pll\|Wheels & Brakes Damage\|wearing}} and {{pll\|Brake Shoes\|overheating the brake shoes}}. It is a property of {{pll\|Internal Combustion Engine\|internal combustion engines}}, utilized as a type of {{pll\|Dynamic Brake\|dynamic braking}} on vehicles with a {{pll\|Mechanical Transmission\|diesel-mechanical powertrain}}.

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	~~To engage the engine brake, the driver needs to disengage the~~ {{pll\|Throttle\|throttle}} ~~and have~~ the {{pll\|~~Reverser~~\|~~reverser~~}} ~~set in~~ the ~~direction~~ the ~~{{pll\|Rail Vehicle Types\|vehicle}} is moving. The losses in~~ the engine ~~cause it~~ to slow down ~~over time~~, ~~and even more so at higher RPM. With a~~ {{pll\|~~Mechanical Transmission~~\|~~mechanical transmission~~}}~~, this slowing down directly affects~~ the ~~vehicle speed too~~. ~~Therefore, selecting~~ a gear where RPM is ~~the highest, within safe limits, will {{pll\|Driving Efficiency\|get~~ the most}} out of ~~the~~ engine brake, and if a train is light enough it will slow down from mere disengagement of the throttle.		Disengaging {{pll\|Throttle\|throttle}} of an engine naturally leads it to drop RPM. However, because the {{pll\|Mechanical Transmission\|mechanical transmission}} has such a tight bond between the engine and the wheels, slowing down of the engine causes the vehicle to slow down too, if the {{pll\|Reverser\|reverser}} is set in the direction of travel. Selecting a gear where RPM is high gets the most out of an engine brake, and if a train is light enough it will slow down from mere disengagement of the throttle.

	<!--T:3-->		<!--T:3-->
	Some diesel-mechanical vehicles ~~are~~ also equipped with a compression brake. Typically operated by a lever, this brake functions by modifying the engine exhaust process in a way that creates extra load on the engine, causing it to slow down quicker than it would normally. This supplements the effect of the engine brake.		Some diesel-mechanical vehicles also come equipped with a compression brake. Typically operated by a lever, this brake functions by modifying the engine exhaust process in a way that creates extra load on the engine, causing it to slow down quicker than it would normally. This supplements the effect of the engine brake.

	<!--T:4-->		<!--T:4-->
	Engine ~~brake~~ and compression ~~brake~~ both exert braking force on the transmission, which may contribute to the {{pll\|Powertrain Overheating\|~~heating~~ up}} of the transmission hydraulic fluid.		Engine losses and compression both exert braking force on the transmission, which may contribute to the {{pll\|Powertrain Overheating\|warming up of the transmission hydraulic fluid}}.

	<!--T:5-->		<!--T:5-->
	~~It is crucial to monitor~~ both the transmission fluid temperature, as well as the engine RPM when using any form of engine braking, to ensure {{pll\|Mechanical Powertrain Damage\|safe operation}}.		Monitoring both the transmission fluid temperature, as well as the engine RPM, when using any form of engine braking, is crucial to ensure {{pll\|Mechanical Powertrain Damage\|safe operation}}.

	<!--T:6-->		<!--T:6-->
	Engine and compression braking, featured only on some ~~{{pll\|Rail Vehicle Types\|~~motorized vehicles}}, does not provide a very powerful braking force for large trains, but it can slow them down over time if used tactfully. The lower the RPM, the weaker the braking force, and at low enough speeds it can practically have no effect. To bring a vehicle to a complete halt, ~~the driver must~~ use braking methods that rely on brake shoes.		Engine and compression braking, featured only on some motorized vehicles, does not provide a very powerful braking force for large trains, but it can slow them down over time if used {{pll\|Driving Efficiency\|tactfully}}. The lower the RPM, the weaker the braking force, and at low enough speeds it can practically have no effect. To bring a vehicle to a complete halt, use {{pll\|Braking Overview\|braking methods}} that rely on brake shoes.

	<!--T:7-->		<!--T:7-->
	~~The driver needs to disengage the compression brake to~~ operate the throttle, reverser and gearbox ~~controls~~ again.		To operate the throttle, reverser and gearbox again, disengage the compression brake.
	</translate>		</translate>

	~~{{See also\|Rheostatic & Regenerative Brake\|Hydrodynamic Brake\|Dynamic Brake\|Train Brake\|Mechanical Transmission\|Internal Combustion Engine\|Throttle\|Reverser\|Brake Shoes\|Weather}}~~
	[[Category:Diesel-Mechanical\|2]]		[[Category:Diesel-Mechanical\|2]]

Leko at 17:16, 10 March 2025

2025-03-10T17:16:04Z

← Older revision		Revision as of 17:16, 10 March 2025
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	<translate>		<translate>
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	Engine braking is an alternative way of slowing down a train, without wearing and overheating the brake shoes. It is a dynamic braking feature of diesel-mechanical vehicles.		Engine braking is an alternative way of {{pll\|Braking Overview\|slowing down}} a {{pll\|Rail Vehicle Types\|train}}, without {{pll\|Wheels & Brakes Damage\|wearing}} and {{pll\|Brake Shoes\|overheating the brake shoes}}. It is a {{pll\|Dynamic Brake\|dynamic braking}} feature of {{pll\|Powertrains Overview\|diesel-mechanical}} vehicles.

	<!--T:2-->		<!--T:2-->
	To engage the engine brake, the driver needs to disengage the throttle and have the reverser set in the direction the vehicle is moving. The losses in the engine cause it to slow down over time, and even more so at higher RPM. With a mechanical transmission, this slowing down directly affects the vehicle speed too. Therefore, selecting a gear where RPM is the highest, within safe limits, will get the most out of the engine brake, and if a train is light enough it will slow down from mere disengagement of the throttle.		To engage the engine brake, the driver needs to disengage the {{pll\|Throttle\|throttle}} and have the {{pll\|Reverser\|reverser}} set in the direction the {{pll\|Rail Vehicle Types\|vehicle}} is moving. The losses in the engine cause it to slow down over time, and even more so at higher RPM. With a {{pll\|Mechanical Transmission\|mechanical transmission}}, this slowing down directly affects the vehicle speed too. Therefore, selecting a gear where RPM is the highest, within safe limits, will {{pll\|Driving Efficiency\|get the most}} out of the engine brake, and if a train is light enough it will slow down from mere disengagement of the throttle.

	<!--T:3-->		<!--T:3-->
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	<!--T:4-->		<!--T:4-->
	Engine brake and compression brake both exert braking force on the transmission, which may contribute to the heating up of the transmission hydraulic fluid.		Engine brake and compression brake both exert braking force on the transmission, which may contribute to the {{pll\|Powertrain Overheating\|heating up}} of the transmission hydraulic fluid.

	<!--T:5-->		<!--T:5-->
	It is crucial to monitor both the transmission fluid temperature, as well as the engine RPM when using any form of engine braking, to ensure safe operation.		It is crucial to monitor both the transmission fluid temperature, as well as the engine RPM when using any form of engine braking, to ensure {{pll\|Mechanical Powertrain Damage\|safe operation}}.

	<!--T:6-->		<!--T:6-->
	Engine and compression braking, featured only on some motorized vehicles, does not provide a very powerful braking force for large trains, but it can slow them down over time if used tactfully. The lower the RPM, the weaker the braking force, and at low enough speeds it can practically have no effect. To bring a vehicle to a complete halt, the driver must use braking methods that rely on brake shoes.		Engine and compression braking, featured only on some {{pll\|Rail Vehicle Types\|motorized vehicles}}, does not provide a very powerful braking force for large trains, but it can slow them down over time if used tactfully. The lower the RPM, the weaker the braking force, and at low enough speeds it can practically have no effect. To bring a vehicle to a complete halt, the driver must use braking methods that rely on brake shoes.

	<!--T:7-->		<!--T:7-->

Nenad: importing old manual

2025-02-28T15:57:46Z

importing old manual

← Older revision		Revision as of 15:57, 28 February 2025
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	~~{{OldManualArticleNotice}}~~
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	{{See also\|Rheostatic & Regenerative Brake\|Hydrodynamic Brake\|Dynamic Brake\|Train Brake\|Mechanical Transmission\|Internal Combustion Engine\|Throttle\|Reverser\|Brake Shoes\|Weather}}		{{See also\|Rheostatic & Regenerative Brake\|Hydrodynamic Brake\|Dynamic Brake\|Train Brake\|Mechanical Transmission\|Internal Combustion Engine\|Throttle\|Reverser\|Brake Shoes\|Weather}}
	[[Category:Diesel-Mechanical]]		[[Category:Diesel-Mechanical\|2]]

Nenad: importing old manual

2025-02-28T15:29:16Z

importing old manual

New page

<languages />
{{OldManualArticleNotice}}
<translate>

Engine braking is an alternative way of slowing down a train, without wearing and overheating the brake shoes. It is a dynamic braking feature of diesel-mechanical vehicles.


To engage the engine brake, the driver needs to disengage the throttle and have the reverser set in the direction the vehicle is moving. The losses in the engine cause it to slow down over time, and even more so at higher RPM. With a mechanical transmission, this slowing down directly affects the vehicle speed too. Therefore, selecting a gear where RPM is the highest, within safe limits, will get the most out of the engine brake, and if a train is light enough it will slow down from mere disengagement of the throttle.


Some diesel-mechanical vehicles are also equipped with a compression brake. Typically operated by a lever, this brake functions by modifying the engine exhaust process in a way that creates extra load on the engine, causing it to slow down quicker than it would normally. This supplements the effect of the engine brake.


Engine brake and compression brake both exert braking force on the transmission, which may contribute to the heating up of the transmission hydraulic fluid.


It is crucial to monitor both the transmission fluid temperature, as well as the engine RPM when using any form of engine braking, to ensure safe operation.


Engine and compression braking, featured only on some motorized vehicles, does not provide a very powerful braking force for large trains, but it can slow them down over time if used tactfully. The lower the RPM, the weaker the braking force, and at low enough speeds it can practically have no effect. To bring a vehicle to a complete halt, the driver must use braking methods that rely on brake shoes.


The driver needs to disengage the compression brake to operate the throttle, reverser and gearbox controls again.
</translate>

{{See also|Rheostatic & Regenerative Brake|Hydrodynamic Brake|Dynamic Brake|Train Brake|Mechanical Transmission|Internal Combustion Engine|Throttle|Reverser|Brake Shoes|Weather}}
[[Category:Diesel-Mechanical]]