What was the cat C7 diesel engine good for?
The electronic configuration was also more robust to offer better fuel management and electronic sensors into the engine. The CAT C7 was really the first heavy duty diesel engine to offer a greatly expanded ECM or electronic computer module.
Why did caterpillar Change the fuel pump on the C7?
With this change, Caterpillar changed the fuel system of the C7 to common-rail injection. The common-rail injection took injection pressures to 27,500 psi. The transfer pump supplies fuel to the fuel rail at 280 psi. The reduction of sulfur levels in ULSD means less lubricity, so circulating the fuel rapidly at high pressure keeps heat down.
What are the issues with the cat C7 ACERT engine?
The ACERT technology was prone to numerous regeneration issues. Drivers reported low power and low fuel economy. It was common that the CAT C7 ACERT engines would experience overheating when driving up an incline. The cooling fan does not kick in until 235 degrees Fahrenheit while many drivers reported overheating at 200 degrees Fahrenheit.
What kind of air inlet system does cat C7 use?
With the ACERT design the smaller CAT C7 models used an air inlet system with multiple traditional wastegated turbos to boost air intake flow and pressure. The more midsized hp models used only a single turbo while the larger horsepower models used dual turbochargers working in conjunction for optimal airflow.
What was the problem with the Caterpillar CAT C7 engine?
The ACERT Technology had a lot of problems for Caterpillar, first with the CAT C7 but more so later on with the CAT 13 and CAT 15 engines. The technology was really the first generation emissions technology for heavy duty diesel engines. The ACERT technology was prone to numerous regeneration issues. Drivers reported low power and low fuel economy.
What kind of fuel does a cat C7 ACERT use?
In 2007 diesel fuel itself changed to Ultra Low Sulfur Diesel or ULSD. The fuel change dictated that the fuel system of the CAT C7 ACERT needed to change to a common-rail injection system. The new common-rail injectors took injection pressures to 25,000-27,500 psi. The fuel transfer pump supplies the fuel to the fuel rail at 280 psi.
What is the fuel delivery system on a cat C7?
The fuel delivery system on the CAT C7 is hydraulic electronically controlled unit injectors for the mid horsepower models and mechanically actuated and electronically controlled on the higher horsepower models. Both systems are metered and timed to inject multiple bursts of fuel to create a more efficient combustion cycle.
What’s the life expectancy of a cat C7 engine?
B10 is the average life expectancy of an engine measured in miles where 10% of the produced engines failed and needed a major overhaul. Consequently, B50 is the average miles where 50% of the engines failed. With the CAT C7 the B50 rating of 450,000-500,000 miles.
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What kind of valve actuation does cat C7 use?
Within the design of the C7, the turbos use variable geometry valve actuation controlled by the ECM to adjust the perfect amount of airflow into the combustion chamber. This variable valve actuation also allows for the CAT C7 to offer an integral jake brake on two of the heavy duty diesel horsepower models.
The electronic configuration was also more robust to offer better fuel management and electronic sensors into the engine. The CAT C7 was really the first heavy duty diesel engine to offer a greatly expanded ECM or electronic computer module.
Our propulsion solutions deliver more power and control to the wheels while optimizing engine power. Whatever your travel plans, there’s an Allison to help you reach your destination. *Class 6-8 Type C Motorhomes require Truck RV Series. FuelSense® 2.0
Where is my 2006 Itasca ellipse cat C7 engine?
The long and short of it is my 2006 Itasca Ellipse with the 350 hp Cat C7 in pending a new engine in Jackson, Georgia. It has been at Georgia Truck and RV. Broken valve caused scored cylinder and broken piston. Likely a new engine. Waiting for damage estimate 6 weeks later. Have extended warranty with Protective Xtra Ride extended warranty.
Can a valve break on a cat C7 engine?
Very fortunate. Valve breakage is a very common problem on the C7 and its forerunner the 3126B. However the mileage is usually in excess of 200,000. I have know several that have had the same problem. Almost always the very last valve on the number 6 cylinder. Glad you had warranty because CAT won’t help.
