Variable-length intake manifold system designed by Toyota
The ACIS/TVIS System
Acoustic Control Induction System, or ACIS, is an implementation of a variable-length intake manifold system designed by Toyota.
Simply put, the ACIS system uses a single intake air control valve located in the intake to vary the length of the intake tract in order to optimize power and torque, as well as provide better fuel efficiency and reduce intake "roar".
The engine control unit (ECU) controls the position of one or more air control valves based on input signals from throttle angle and engine RPM. The vacuum switching valve (VSV) which controls the vacuum supply to the actuator is normally closed and passes vacuum to the actuator when it is energized by the ECU. By energizing the VSV vacuum is passed to the actuator, closing the air control valve. This effectively lengthens the intake manifold run. By de-energizing the VSV, vacuum to the actuator is blocked and trapped vacuum is bled off of the actuator diaphragm. Toyota ACIS is an On/Off system. The valve (or valves in newer models with multiple valves to create more than 2 lengths) is either fully opened or fully closed.
An example of early single-valve ACIS programming would be the 3.0L 3VZ-FE engine. The ECU actuates the VSV to close the valve when the throttle position is 60% or greater and engine speed is 3,900 RPM or more.[citation needed]
Applications:
5E-FHE
1G-FE (VVT-i)
1GR-FE (Single VVT-i variants only) [1]
1GZ-FE
2JZ-GE
7M-GE
3S-GE
1S-iLu
1MZ-FE
3UR-FE
1UZ-FE (VVT-i)
3VZ-FE
^"Engine Details". Retrieved 2018-02-25.
and 25 Related for: Acoustic Control Induction System information
AcousticControlInductionSystem, or ACIS, is an implementation of a variable-length intake manifold system designed by Toyota. Simply put, the ACIS system...
reduced-tension piston rings and auxiliary belt drive. An AcousticControlInductionSystem switches the length of the intake tract in two stages, based...
hard braking, and high speed maneuvering. ACIS (AcousticControlInductionSystem), a method of controlling air compression pulses inside the intake piping...
Toyota's AcousticControlInductionSystem. This system consists of a bulkhead to divide the intake manifold into two sections, and an intake air control valve...
Applications 2003–2004 Toyota Century List of Toyota engines AcousticControlInductionSystem Cleveland, Bryce (2021-08-13). "Toyota 1GZ-FE: Everything...
Induction cooking is performed using direct electrical induction heating of cooking vessels, rather than relying on indirect radiation, convection, or...
(Toyota Variable InductionSystem) used in the early versions of the 3S-GE, 7M-GE, and 4A-GE engines, and ACIS (acousticcontrolinductionsystem) Volkswagen:...
generation also did away with the T-VIS system, which was replaced by the ACIS (AcousticControlInductionSystem), proving to be much more efficient. T-VIS...
resonance at different engine speeds. Much like Toyota's AcousticControlInductionSystem, it had two sets of intake runners, a long set for low-medium...
Music Association (CMA) Awards (2011-2021, 1992 Rock & Roll Hall of Fame Induction Ceremony, and the 1985 Grammy Awards. Working with Lynda Carter, Marx...
2018-06-18. Lander, Cyril W. (1993). "§9–8 'Slip Ring Induction Motor Control' in Chapter 9 – A.C. Machine Control". Power electronics (3rd ed.). McGraw-Hill 480...
fed synchronous motor system has an independently excited rotor winding that does not rely on the principles of slip-induction of current. The brushless...
also exist combining attributes of the electric and acoustic guitars: the semi-acoustic and acoustic-electric guitars. Invented in 1932, the electric guitar...
motor Stepping motor "Acoustic noise in home appliances due to torque ripple in motor drives – part 1 - Motor Drive & Control - Blogs - TI E2E Community"...
robots using precise motion capture systems in laboratory conditions, current systems such as Shooting Star can control teams of hundreds of micro aerial...
windings, which enables dynamic control of pulse timing and shaping. This differs from the apparently similar induction motor that also energizes windings...
systems (with neck loops), and induction loop systems (also called "hearing loops") that transmit sound to hearing aids from public address systems and...
receivers and test equipment to control frequency, in place of the tuned circuits which are used at lower frequencies. Acoustic cavity resonators, in which...
type is the valveless pulsejet. The technical terms for this engine are acoustic-type pulsejet, or aerodynamically valved pulsejet. One notable line of...
law of induction Ampère's law Ohm's law Power Devices Gate turn-off thyristor MOS-controlled thyristor (MCT) Power BJT/MOSFET Static induction devices...
Electromagnetic acoustic transducer (EMAT) is a transducer for non-contact acoustic wave generation and reception in conducting materials. Its effect...
detonation. Influence firing mechanisms often use a combination of acoustic and magnetic induction receivers. Magnetic sensing can only be applied to detect huge...
charging handheld devices like phones and electric toothbrushes, RFID tags, induction cooking, and wirelessly charging or continuous wireless power transfer...
telecommunications systems (e.g. radio transmitters and receivers, remote controls, etc.) that use some form of energy (e.g. radio waves and acoustic energy) to...
Global Information