Powering a 2015 CR-V is a new Earth Dreams Technology™ direct-injected 2.4-liter DOHC i-VTEC inline 4-cylinder engine. The approach injection (DI) complement and other technologies brew to broach a poignant 11 percent boost in rise engine torque, to 181 lb-ft1, with larger appetite accessible over a far-reaching handling range. Peak appetite is 185 horsepower2 and a engine meets difficult PZEV and ULEV-2 emissions standards regulating on unchanging unleaded gasoline.
The CR-V’s new powerplant is interconnected with a invariably non-static delivery (CVT) with an altogether ratio operation 33-percent wider than a 5-speed involuntary delivery it replaces, that is a vital writer to a CR-V’s alleviation in fuel efficiency. Other important contributors are a fit approach injection, a new explosion cover design, equivalent cylinder bores and a operation of friction-reducing technologies. These improvements net an expected EPA fuel-economy rating of 27/34/293 mpg (city/hwy/combined) for front-wheel expostulate models and 26/33/283 mpg for models versed with Real Time AWD. Further enhancing all-around performance, engine weight was reduced by 1.3-percent pleasantness of a lighter retard design, a new cosmetic cam cover and a some-more fit appendage belt design.
For drivers who enterprise a four-season certainty of all-wheel drive, a 2015 CR-V is accessible with Real Time AWD with Intelligent Control System to assistance yield appetite to those wheels with traction in low-grip pushing conditions such as snow, sleet and unpaved highway surfaces. The electronically tranquil all-wheel-drive complement provides a fast, discerning initial response when a detriment of traction is rescued and minimizes a disastrous outcome on fuel efficiency.
Key New Powertrain Features
- 2.4-liter, DOHC, i-VTEC® + VTC direct-injected (DI) inline-four
- Computer-controlled approach injection (DI) with multi-hole fuel injectors
- 1.3-percent lighter: Cylinder block, crankshaft, piston, conduct cover, etc.
- Reduced friction: Offset cylinder, piston rings, appendage belt, etc.
- 11-percent some-more torque to 181 lb-ft torque @ 3900 rpm (SAE net)
- 185 horsepower @ 6400 rpm (SAE net)
- Engine (continued)
- 4-percent softened fuel potency (engine alone)
- Continuously Variable Transmission (CVT)
- G-design Shift for softened linearity and softened kick-down characteristics
- 33-percent wider ratio range
- 17-percent larger torque capacity
- Compact size
Cylinder Block, Crankshaft and Pistons
The CR-V’s 2.4-liter engine has a lighter-weight die-cast aluminum cylinder retard with a main-bearing singular cradle pattern that creates a firm public to assistance minimize sound and vibration. Cast-in iron cylinder liners yield long-lasting durability. Each biography on a forged-steel crankshaft is micro-polished to revoke middle friction. To urge fibre via a rpm operation and assistance revoke sound levels, a CR-V is propitious with an middle balancer unit. Consisting of a span of chain-driven counter-rotating shafts located in a oil pan, a balancing complement helps relieve a fundamental second-order harmonic vibrations that routinely impact inline 4-cylinder engines.
To revoke piston-sliding friction, a cylinder bores are equivalent by 8.0 mm from a crankshaft. This gives a joining rods a some-more auspicious angle during any appetite stroke, that reduces side loading on a pistons and in turn, improves efficiency. The engine also facilities a fake crankshaft for high acerbity and low friction. With 4 smaller-diameter counterweight and 4 larger-diameter counterweights, a crankshaft offers optimized flywheel outcome while minimizing sum weight.
Lightweight pistons have a delicately optimized dress pattern to minimize reciprocating mass, and reduced weight minimizes quivering and increases handling efficiency. The piston crowns are dished to assistance say quick explosion and to optimize placement of a stratified fuel assign from a approach injector in any cylinder. This tighten control over a explosion routine boosts altogether handling efficiency.
Cylinder Head and Valvetrain
A lightweight cylinder conduct done of pressure-cast aluminum amalgamate uses front-located empty ports that yield larger leisure in a blueprint of a close-coupled catalytic converter that mounts directly to a cylinder head. With empty passages expel directly into a cylinder head, a need for a normal apart empty plural is eliminated.
A silent-chain drives twin beyond cams and 4 valves per cylinder, and facilities a double-arm tensioner pattern that reduces handling friction. The cam expostulate is designed to be upkeep giveaway via a life of a engine. To serve revoke friction, a finish of a camshaft journals has been improved.
The explosion cover figure and valve angles have been optimized to boost fuel potency and power. The previous-generation CR-V engine had a 51-degree enclosed angle between a intake and empty valves; a new engine facilities an enclosed valve angle of 35 degrees. The narrower valve angle decreases a surface-to-volume ratio and helps emanate a flatter, some-more compress explosion cover that reduces unburned hydrocarbon emissions. With this new explosion cover figure and a accurate control of approach injection, a application ratio has been augmenting to 11.1:1 (up from 10.5:1 on a before port-injected engine), nonetheless a engine still operates on unchanging unleaded fuel.
The cylinder conduct facilities a new high-tumble intake-port design. In mixed with a new explosion cover and piston climax shape, a design’s high turn of airflow decrease helps emanate a homogenous fuel rebate for low fuel expenditure and high airflow for high appetite output.
The CR-V’s engine creates use of new friction-reducing technologies designed to urge engine efficiency. The outdoor skirts of a lightweight aluminum pistons underline a low-friction molybdenum cloaking practical in a singular dot-pattern. The outcome is reduced altogether attrition as a pistons pierce within a cylinder bores. A routine called “plateau honing” serve lowers a attrition turn between a pistons and a cylinders by formulating an ultra-smooth surface. Plateau honing is a 2-stage machining procession that uses dual harsh processes instead of a some-more compulsory singular honing process. This also enhances a long-term wear characteristics of a engine. Due to a ultra-smooth cylinder surface, low tragedy piston rings could be utilized, that revoke attrition while progressing sealing efficiency. A low-friction cam sequence and double-arm tensioner, alleviation in a camshaft biography finish, and a use of low flexibility engine oil (0W-20) serve revoke friction.
To boost altogether car efficiency, poignant efforts were done to revoke a weight of a 2015 CR-V’s engine. Through crafty engineering and courtesy to detail, mixed components were redesigned to be lighter while still providing Honda’s eminent continuance and efficiency. Chief among a changes is a some-more firm nonetheless lighter cylinder block. Block weight was shaved by shortening a incompatible mating aspect areas and deletion a breather passage; a cam sequence cover is used for respirating instead. Optimizing a figure of a dress helped to mislay weight from a pistons. A rebate in a hole of 4 crankshaft counterweights, while augmenting a hole of a other 4 provides a same turn of balancing while shortening weight. A high potency appendage belt pattern saves weight with a rejecting of a vagrant pulley, decreased hole of a other pulleys, a adoption of a hydraulic automobile tensioner, a creosote tensioner pulley and decreased belt length. The oil filter and fuel injector bases, oil gallery top and compressor joint were all separated with a components being ascent directly. Having one of a catalytic converters mounted directly to a cylinder conduct and integrated into a empty siren strew serve weight. The duty of a creosote cylinder conduct cover, a press-fit H2O siphon pulley, a delegate balancer being integrated with a oil pump, a compress high-output ACG (alternating stream generator) and handle strap routing efficiencies and length rebate also reduced a altogether weight of a new engine.
i-VTEC Valve Control System
The CR-V’s direct-injected 2.4-liter DOHC 16-valve i-VTEC engine uses an modernized valve-control complement to brew high appetite outlay with high fuel potency and low emissions. The CR-V complement combines Variable Valve Timing and Lift Electronic Control (VTEC), that varies valve lift, timing and era of a intake valves, with VTC (Variable Timing Control), that invariably adjusts a intake camshaft phase. At low rpm, a VTEC intake valve timing and lift are optimized for quick swirl-pattern cylinder filling. As engine rpm builds past 4800 rpm, a VTEC complement transitions to a high-lift, long-duration intake cam form for aloft high-rpm engine power.
The “intelligent” apportionment of a complement is a ability to invariably change a timing (phasing) of a intake cam relations to that of a empty camshaft. This helps boost appetite and also provides a smoother idle (allowing idle speed to be reduced). The intake cam timing is sundry formed on submit from sensors that ensure rpm, timing, stifle opening, cam position and empty air-fuel ratio. The outcome is augmenting fuel potency and revoke nitrous-oxide (NOx) emissions.
Direct Injection System
The CR-V’s engine incorporates direct-injection (DI) for 2015. Conventional engines regulating multi-port fuel injection brew fuel and atmosphere before they enter a explosion chamber, with approach injection, fuel is injected directly into a explosion chamber. This allows for softened explosion and altogether efficiency. The CR-V’s complement facilities a compress high-pressure direct-injection siphon that allows both high fuel upsurge and tapping suppression, and non-static vigour control optimizes injector operation. A multi-hole injector delivers fuel directly into any cylinder.
The multi-hole injectors emanate a ideal fuel/air rebate in a cylinders and also emanate a diseased stratified explosion outcome that maximizes fuel potency during revoke appetite conditions. The stratified assign puts a rebate that’s richer nearby a hint block for easy ignition, while other areas on a explosion cover have a leaner fuel/air ratio. Based on a handling conditions, a approach injection complement alters a duty for best performance. Upon cold engine startup, fuel is injected into a cylinders on a application stroke. This creates a diseased stratified assign outcome that improves engine start-up and reduces empty emissions before normal handling heat is reached. Once a engine is entirely comfortable for limit appetite and fuel efficiency, fuel is injected during a intake stroke, formulating a some-more comparable fuel/air brew in a cylinder that is aided by a high-tumble intake pier design. This improves volumetric efficiency, and a cooling outcome of a incoming fuel improves anti-knock performance.
Drive-by-Wire Throttle Control
An electronic drive-by-wire complement helps raise a pushing impression of a CR-V. With intelligent wiring joining a stifle pedal to a stifle moth valve in a intake manifold, a engine response can be optimized to fit a pushing conditions and to softened compare a driver’s expectations. By expelling a approach stifle wire tie to a engine, a ratio between pedal transformation and a DC motor-controlled stifle moth can be invariably optimized. To establish a stream pushing conditions, a complement monitors pedal position, stifle position, car speed, engine speed and engine vacuum. This information is afterwards used to conclude a stifle control sensitivity.
High-Efficiency Catalytic Converters
Key contributors to a CR-V engine’s glorious emissions opening are a high-efficiency catalytic converters. One converter mounts directly to a front of a cylinder head, close-coupled for quick activation after a engine is started. A second converter is positioned somewhat downstream, underneath a newcomer cell floor. Both converters use a thin-wall pattern that increases middle greeting area and improves efficiency. A high-efficiency empty complement and high-density catalytic converters assistance a CR-V engine accommodate difficult LEV2-ULEV emissions certifications in California and Federal BIN5 certifications.
Multi-stage Alternator Control
To urge battery life and assistance revoke fuel consumption, a CR-V has a new multi-stage alternator control system. By closely monitoring a battery’s assign state, a complement can adjust alternator outlay some-more precisely than a before high/low mode system. This glorious control reduces extreme assign or liberate and can assistance boost battery life by adult to 30 percent. By stopping over-abundance appetite generation, a multistage alternator control along with other electrical complement efficiencies contributes to an alleviation in fuel efficiency.
The 15.3-gallon fuel tank is molded of high-density polyethylene for low weight, gnawing rejecting and impact resistance. It is positioned immediately brazen of a back wheels to assistance ensure opposite collision damage. The corners of a tank are dull and a inside of a tank is confused to lessen a odds of sloshing-fuel noise. A lightweight and fit fuel siphon is housed inside a fuel tank. The fuel complement also incorporates a returnless fuel supply complement that helps revoke fog generation, and a lifetime fuel-filter that requires no unchanging maintenance. The CR-V’s smallest fuel class requirement is unchanging unleaded.
Torque-Rod Engine Mount System
A torque-rod engine-mount complement enhances a CR-V’s still and vibration-free operation. The complement resists a engine’s rotational torque inputs to a chassis, shortening idle quivering and mid- and high-frequency engine sound during acceleration.
Continuously Variable Transmission (CVT)
The CR-V’s new Continuously Variable Transmission (CVT) offers seamless rigging ratio transitions and glorious acceleration matched with fit low-rpm cruising. The CVT has a 33-percent wider altogether ratio widespread than a 5-speed involuntary delivery it replaces. This change formula in clever acceleration opening joined with reduced engine rpm during high highway speeds. The rarely fit operation of a CVT contributes a poignant alleviation in altogether fuel potency compared to a before 5-speed involuntary transmission.
The CVT is comprised of a torque converter that drives a variable-width expostulate pulley that is connected by a steel belt to a variable-width driven pulley. With a pointed middle faces, a belt can round a pointed pulley faces during varying diameters depending on a pulley width, that alters a effective ratio between a pulleys. Since there are no stairs in a pulley faces, a operation of probable rigging ratios is scarcely infinite. This ultra-fine control of a rigging ratio is a pivotal to a CVT’s larger potency over a compulsory involuntary delivery with a singular series of dissimilar rigging ratios. Instead of approximating a scold ratio for a conditions, like a compulsory involuntary does, a CR-V’s CVT can precisely name a best ratio from impulse to impulse but stairs or slippage. To boost a potency of a interface of belt to pulleys, a fellow of attrition was softened by 10-percent with optimized steel hit permitting for reduction belt tension.
Computer control of a delivery allows a ratio between a crane to be altered roughly now to best fit a pushing conditions and accelerator pedal use. A heavenly rigging set allows a delivery to change between brazen and retreat directions with a operation of a multi-plate clutch, with plates that have a 10-percent boost in aspect friction. A variable-flow oil siphon optimizes oil upsurge to a transmission’s relocating tools while minimizing a bucket on a engine. The CR-V’s CVT is some-more compress and lighter compared to a compulsory CVT by utilizing steel gaskets, carrying a unit-type physique construction and fewer tools by integration, such as a parking rigging being integrated with a driven pulley and a function-consolidated stator. Compared to a before generation’s 5-speed involuntary transmission, a CVT has some-more compress measure (24 mm shorter) and has a aloft torque ability (up by 17-percent).
G-Design Shift Feature
The CR-V CVT is designed to yield a best rigging ratio for a pushing conditions and to offer a some-more healthy pushing feel than some before CVT transmissions that have a away “rubber-band” feel compared to a compulsory involuntary transmission; a CR-V also offers stronger acceleration response with a linear build in engine rpm that avoids many of a “slipping” feeling some drivers notice with other CVTs. The G-design Shift proof gives a CR-V a some-more linear and sporty pushing feel.
The CR-V CVT’s G-design Shift proof is designed to offer some-more evident acceleration response than possibly compulsory automatics or other CVT designs. When abruptly requesting appetite from a steady-state cruising speed, a CR-V CVT immediately sends appetite to a expostulate wheels while concurrently adjusting a rigging ratio (seamlessly and gradually downshifting) to uniformly move a engine to a horsepower rise in a linear way. By comparison, a compulsory involuntary is slower to respond and loses time creation mixed downshifts. Since a involuntary delivery has a singular series of separate, dissimilar ratios, even when entirely downshifted, it can usually estimate a best engine rpm as speed increases, that reduces acceleration efficiency.
CVT Automatic Modes
The delivery can be operated in 3 opposite entirely involuntary modes with a console-mounted straight-gate shifter. The D mode is ideal for many pushing situations, and combines fuel potency with well-spoken operation and manageable appetite when needed. The S mode is for some-more performance-oriented driving, and facilities some-more assertive delivery mapping to keep engine rpm aloft for larger acceleration and response. The L mode is for revoke speeds and provides additional engine braking.
All CR-V models are versed with an ECON symbol on a left side of a instrument row as partial of a Eco Assist™ system. When activated, ECON mode alters a Drive-by-Wire stifle complement response bend in a operation from about 10 percent of pedal transformation to 80 percent. With reduction gain, a stifle opening in this operation increases some-more gradually to revoke a potentially extreme rise submit for softened fuel efficiency. ECON mode also alters a operation of a journey control complement and a atmosphere conditioning system, permitting for somewhat augmenting variances with a set speed or a set heat in sequence to preserve fuel whenever possible.
Real Time AWD with Intelligent Control System
The 2015 CR-V is offering with Real Time AWD with Intelligent Control System™. The compress and fit Real Time AWD provides a high grade of four-wheel-drive sophistication in rain, snow, mud roads and dry pavement. System operation is totally involuntary and probably pure in smoothness. Unlike some four-wheel-drive systems that need a motorist to name a expostulate mode formed on a viewed need, Real Time AWD’s involuntary operation means a complement is always prepared to send torque to a back wheels, permitting a motorist to concentration some-more on pushing when situations are demanding.
The capabilities of a complement are prioritized to serve support high fuel potency and all-around drivability on-road as good as off-road. Assisting a front wheels when it is beneficial, Real Time AWD now powers a back wheels when starting from a stop, even on dry pavement, operative in team-work with Vehicle Stability Assist™ (VSA)4 and a Motion-Adaptive Electric Power Steering (EPS). The Real Time AWD complement can work during all speeds when needed. When torque send to a back wheels is not compulsory such as when cruising, expostulate to a back wheels is decoupled for reduced drag.
The CR-V’s all-wheel expostulate complement consists of a compulsory front-wheel-drive system, a compress send box that distributes torque to a propeller missile regulating a length of a vehicle, a back differential, an electronically-controlled hydraulic pump, a multi-plate clutch, and left and right rear-wheel driveshafts. The multi-plate purchase connects a propeller missile to a back differential and is operated by an electric engine pushing a hydraulic pump. The electric engine is tranquil by a Intelligent Control System, that means that a complement can actively dispense appetite formed on a conditions. The complement doesn’t merely conflict to front circle spin; it minimizes circle spin before it happens by promulgation appetite to a back wheels accordingly. For efficiency, a electric engine activating a hydraulic siphon is idled when not required, serve shortening drag within a complement and assisting to revoke appetite consumption.
When starting on sleet for example, a complement sends appetite to a back wheels right from a start, minimizing a intensity for front circle spin. The complement can also detect when a CR-V is climbing a mountain and sends a larger volume of appetite to a back wheels in team-work with a Hill Start Assist feature. Hill Start Assist maintains stop vigour quickly after a stop pedal is released, giving a motorist time to accelerate and uniformly resume motion. The Intelligent Control System now assesses a road’s slope angle regulating a G-sensor and a turn of hold as rescued by VSA permitting combined initial apportioning of torque to a back wheels for well-spoken starts.
In summary, Real Time AWD offers a optimal change of assured capability and user friendship in a lightweight and fuel-efficient design. The motorist can simply step on a accelerator and let a complement maximize use of accessible hold and climbing capability.
The CR-V’s car upkeep report is distributed by a Maintenance Minder system. The Maintenance Minder complement automatically indicates when to have customary use achieved formed on tangible pushing conditions (tracked by a ECU) and minimizes a guesswork associated to either a car is being used in customary or serious use conditions for upkeep interlude purposes. The arrangement indicates when to change a oil, atmosphere cleaner, delivery fluid, hint plugs or coolant, as good as when to stagger a tires. As distributed by a Maintenance Minder system, a CR-V has an engine tune-up interlude of 100,000+/- miles or more.
*SAE J1349 contrast method
1 181 lb-ft @3900 rpm (SAE net)
2 185 horsepower @ 6400 rpm (SAE net)
3 2015 EPA fuel-economy ratings. Use for comparison functions only. Your mileage will change depending on how we expostulate and say your vehicle.
4 VSA is not a surrogate for protected driving. It can't scold a vehicle’s march in each conditions or recompense for forward driving. Control of a car always stays with a driver.
5 Does not request to liquid and filter changes. Will change with pushing conditions. Please see your Honda play for details.