Caltex with Techron® is proven at preventing build-up of harmful deposits, so your engine can perform like it’s supposed to.
What is knocking?
Have you ever heard a sharp ‘chattering’ or rattling sound from your car engine upon accelerating up a hill or steep incline?
Chances are, what you heard was ‘knocking’ or abnormal combustion. This occurs when the fuel inside the combustion chamber ignites uncontrollably, causing a knocking or pinging sound. It usually only lasts for a while but it can be harmful to your engine in the long run.
The fuel octane level required by a brand new engine is determined by its manufacturer. The engine’s octane number requirement (ONR) generally increases as combustion chamber deposits form during the first several thousand kilometers of operation. If the octane appetite of an engine is higher than the octane of the fuel being used, knocking occurs. Since sustained knocking is harmful to an engine, modern cars are fitted with devices called knock sensors (designed to detect knock, often even before the driver does).
How does ‘knocking’ damage your car and reduce power and acceleration?
A knock sensor is designed to detect knock, often even before the driver does. Upon sensing knocking or pinging, the engine’s computer control system adjusts the engine’s operation by retarding the spark timing to avoid the knock. These adjustments can reduce power and acceleration, particularly during heavy throttle, just when you need power the most!
How does Caltex with Techron® eliminate ‘knocking’?
Research shows that precursors for combustion chamber deposits can come from the fuel, lower quality fuel additives, and the engine oil.
Excessive combustion chamber deposits can promote knock, they can also suppress your engine’s full potential by contributing to more frequent knock sensor-induced ignition timing retardation. Caltex with Techron® is proven at cleaning vital engine parts. Its unique design helps minimise the contribution to harmful combustion chamber deposits, helping your engine maintain maximum performance.
Caltex™ with Techron® cleans your car’s fuel system to help restore fuel economy lost due to the build-up of performance-robbing deposits.
What are fuel injectors?
Fuel injectors are designed to accurately meter fuel to the engine and to deliver it in a precise pattern of extremely fine droplets. Because the fuel passages are very narrow, injectors are highly sensitive to even small amounts of deposits in the critical regions where the fuel is metered and atomised. These deposits can reduce fuel flow and alter the spray pattern.
How can Caltex with Techron® help fuel burn more efficiently?
Fuel needs to be finely atomised for it to burn properly, and an altered spray pattern can result in fuel droplets that are too large to be properly burnt. Although generally passing harmlessly through the exhaust system, the unburned fuel is clearly not producing power and the inefficient combustion ultimately means the engine uses more fuel to produce a given power output as a result.
Although less common than fuel injection these days, carburetted engines also experience similar problems from deposits because carburettors also use a number of small channels and orifices to meter and vaporise fuel.
Caltex™ with Techron® keeps your engine clean on the inside, helping it run more efficiently and reliably.
What is CCDI?
Combustion chamber deposit interference (CCDI) is the result of physical contact between deposits on the piston top and the bottom of the cylinder head and is manifested as a loud, metallic banging sound when the engine is cold. CCDI is limited to the engines that have been designed primarily to reduce emissions, with minimal clearance – one millimetre or less – between some areas of the piston top and the cylinder head (squish areas) when the piston is at top dead centre.
What is CCDF?
Combustion chamber deposit flaking (CCDF) causes low-compression pressure to result, due to improper sealing of the valves. This problem occurs when pieces of CCD flake off and end up lodged between the valve face and the valve seat. Typical symptoms of CCDF are difficulty in starting and rough running when cold.
How can Caltex with Techron® help your engine run more efficiently?
Using Caltex with Techron® means you can be sure that your car’s fuel system is cleaned up and kept clean. A clean engine provides for a smoother ride by ensuring optimum combustion and enhancing drivability. A car with a clean fuel system is more responsive than a car that is choked up with deposits.
Fewer deposits mean less chance of deposit-related engine problems, and can help your car maintain its tip-top condition so it stays on the road and out of the workshop.
Caltex gasolines with Techron® have the added bonus of containing a powerful demulsifier which helps separate water and minimise rust.
Caltex™ with Techron® keeps your engine clean on the inside, helping your engine to run at its best. Deposits in the car’s fuel injectors and intake valves can cause increased emissions of harmful substances such as hydrocarbons, carbon monoxide and nitrogen oxides.
Dirty engines are high emitters
It is well known that injector blockages and intake valve deposits contribute to emissions. Differences between injector flow rates are particularly important because the oxygen sensor controls fuel flow into the engine. While one injector may be injecting too little fuel, the oxygen sensor will instruct the engine’s computer to have all injectors put more fuel into the engine. This degrades performance, reduces fuel economy and increases exhaust emissions.
Deposits form on intake valves and ports because they operate at high temperatures in a very reactive environment whenever the engine is running. If the deposits become heavy, they reduce engine power because they restrict and alter the flow of air and fuel into and within the cylinder.
In some sensitive fuel-injected engines, even low levels of intake valve deposits can harm performance. Cold-start and warm-up drivability can be adversely affected and exhaust emissions increase.
The magnitude of the emissions increase can be surprisingly large. This occurs because the deposits act somewhat like a sponge, absorbing and then releasing fuel, which upsets the ratio of fuel and air, particularly as the engine is changing speed. Other valve deposit problems include valve sticking because deposits interfere with the valve stem sliding in its guide. Another problem involves burned valves because severe deposits prevent the valve from seating properly.
How can Caltex with Techron® reduce your engine’s emissions?
Caltex with Techron® is proven at keeping fuel systems clean. The unique formulation also minimises any contribution to harmful combustion chamber deposits which can cause increased emissions of nitrogen oxides.
Caltex™ with Techron® keeps your engine clean on the inside, helping you to experience a smoother drive.
How can deposits affect the smooth driving?
In most modern cars, fuel passes through nozzles called fuel injectors before it is ignited inside the combustion chamber. If these are blocked or coated with deposits, you could experience hesitation and stumbling upon acceleration.
Combustion chamber deposits can also contribute to run-on, the annoying occurrence when you switch off the ignition and the engine stumbles a few times before switching off.
How does Caltex with Techron® improve drivability?
Volatility, or a fuel’s tendency to vaporise, is the key characteristic for a smooth ride, also known as ‘drivability’. Drivability describes how easily your car starts, warms up, drives and accelerates. When the spray pattern of fuel from the fuel injector is restricted in any way, the vaporisation can be negatively affected. That has serious implications on your car’s drivability because only fuel vapor actually burns. It doesn’t burn at all in liquid form.
Caltex with Techron® is proven at cleaning vital engine parts. It also minimises the contribution to harmful combustion chamber deposits, helping your engine maintain the maximum performance for which it was designed.
How do port fuel injector (PFI) deposits form?
Port fuel injector (PFI) deposits form during the hot soak period after the engine has been turned off. The stationary gasoline trapped in the injector tip is exposed to a higher temperature for a longer time than the fuel that flowed through the injector when the engine was running. The heat degrades the fuel, initiating deposit formation. In the absence of an effective additive, injector deposits can form quite rapidly if the car is used predominantly for short trips.
Cold-start and warm-up drivability can be adversely affected as intake valve deposits can act somewhat like a sponge, absorbing and then releasing fuel, which upsets the ratio of fuel and air, particularly as the engine is changing speed.
Other valve deposit problems include valve sticking caused by deposits interfering with the valve stem sliding in its guide.