Engineering - Induction Technologu

Question 1

2-Stage Intake Manifold (V-6 Models)
Print as PDF
What’s the Benefit?

This ingenious design enhances torque production throughout the engine’s rpm range for greater responsiveness.

Answer 1

The Feature:

A valve within the intake manifold opens and closes to alter the volume and shape of the chamber.

At lower engine speeds, the valve is closed, creating the optimum condition to take advantage of sonic resonance to help pack more of the intake charge into the combustion chamber.
At higher rpm, the valve opens to cancel the resonance effect and allow intake inertia to fill the cylinders more effectively.

Question 2

Drive-by-Wire Throttle System (Accord, Civic, CR-V, Fit, HR-V, Odyssey, Pilot and Ridgeline)
Print as PDF
What’s the Benefit?

This system enhances smooth acceleration appropriate for conditions, for greater driveability.

Answer 2

The Feature:

Instead of a mechanical linkage from the accelerator pedal to the fuel-injection throttle plate, all Honda models use Drive-by-Wire technology.

The system uses an electronic position sensor connected to the accelerator pedal that sends an electronic signal to the vehicle’s powertrain control module (PCM).
The PCM combines the accelerator-position signal with data such as engine rpm, coolant temperature and road speed, and then optimizes the movement of the throttle plate to the desired position.’

Question 3

Direct-Injection System (Accord, Civic, CR-V, Fit, Odyssey, Pilot and Ridgeline)
Print as PDF
What’s the Benefit?

Enhanced power output and fuel efficiency36 result from this technology.

Answer 3

The Feature:

Direct injection is a significant advance in induction design.

Traditional multi-port fuel-injection systems mix fuel and air in the engine’s intake ports before they enter the combustion chamber.
With direct injection, fuel is sprayed directly into the combustion chamber.
DI promotes a desirable “tumble motion” in the intake charge, promoting better combustion and higher overall fuel efficiency.

Question 4

Programmed Fuel Injection (PGM-FI) (Accord, Civic, CR-V, Fit, HR-V, Odyssey, Pilot and Ridgeline)
Print as PDF
What’s the Benefit?

This feature helps provide outstanding power and driveability, with reduced emissions and better fuel efficiency36—plus easier maintenance and repair.

Answer 4

Programmed Fuel Injection (PGM-FI) (Accord, Civic, CR-V, Fit, HR-V, Odyssey, Pilot and Ridgeline)
Print as PDF
What’s the Benefit?

This feature helps provide outstanding power and driveability, with reduced emissions and better fuel efficiency36—plus easier maintenance and repair.